CN101570131A - Four-wheel driven hybrid vehicle driving system and driving management method thereof - Google Patents

Four-wheel driven hybrid vehicle driving system and driving management method thereof Download PDF

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Publication number
CN101570131A
CN101570131A CNA2009100399646A CN200910039964A CN101570131A CN 101570131 A CN101570131 A CN 101570131A CN A2009100399646 A CNA2009100399646 A CN A2009100399646A CN 200910039964 A CN200910039964 A CN 200910039964A CN 101570131 A CN101570131 A CN 101570131A
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control unit
motor
drive
car load
load control
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CNA2009100399646A
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CN101570131B (en
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董长静
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Chery Automobile Co Ltd
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SAIC Chery Automobile Co Ltd
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Priority to CN2009100399646A priority Critical patent/CN101570131B/en
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Priority to PCT/CN2010/073496 priority patent/WO2010139275A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • B60K6/448—Electrical distribution type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/52—Driving a plurality of drive axles, e.g. four-wheel drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/10—Accelerator pedal position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention provides a four-wheel driven hybrid vehicle driving system capable of meeting the needs of a motor vehicle for torque during running in an urban area and reducing oil consumption and tail gas emission and a driving management method thereof. The driving system comprises an engine driving front wheels, an ISG motor coaxially arranged with the engine and a driving motor driving rear wheels, wherein the engine is connected with an engine management unit; the ISG motor is connected with an ISG motor control unit; the driving motor is connected with the motor control unit; and the ISG motor and the driving motor are connected with a high voltage battery through an inversion unit. The key point is that the driving system also comprises a vehicle control unit and a high voltage management unit connected with the high voltage battery. The vehicle control unit, the high voltage management unit, the engine management unit, the ISG motor control unit and the motor control unit are connected through CAN buses; and the vehicle control unit is also connected with an accelerator pedal position sensor and a vehicle speed sensor.

Description

A kind of drive system of four-drive hybrid electric vehicle and driven management method thereof
Technical field
The invention belongs to hybrid vehicle manufacturing technology field, specially refer to the drive system and the driven management method thereof of four-drive hybrid electric vehicle.
Background technology
Now, automobile fuel consumption and emission problem have become the automobile of the two principal themes that influences automobile industry development, particularly four wheel drive, though enough propulsive efforts and cross country power are arranged, but its oil consumption and discharging are bigger, have not only brought very big economical burden to the car owner, also pollute the environment.For energy savings with improve environment, four-drive hybrid electric vehicle becomes a direction of people's research and development, and it can be realized fuel-economizing, reduce the purpose of discharging, environmental protection, has both had the advantage of electronlmobil fuel-economizing, environmental protection, easy to lubricate as general-utility car again, the restriction of no continual mileage.
Existing four-drive hybrid electric vehicle general using driving engine direct drive front-wheel utilizes heavy-duty motor direct drive trailing wheel, and the general electric-only mode that adopts travelled when low speed driving and battery electric quantity were relatively more sufficient on good road surface; And when being higher than certain value, the speed of a motor vehicle switches to driving engine independent drive pattern; If when vehicle needs brish acceleration or climb very steep slopes, just can switch to the 4 wheel driven pattern.Though this driving method can satisfy the dynamic property requirement; car load economy and emission performance performance also are better than traditional 4 wheel driven automobile; but it also has some drawbacks; when for example travelling in the urban district; run into the situation of traffic congestion, traffic lights through regular meeting; the words that only adopt electric-only mode to travel this moment; when brish acceleration, be difficult to satisfy the instantaneous torque demand of automobile; in case and electrokinetic cell SOC is low excessively; the pure motor driving pattern can't start; thereby can only rely on the engine drive car load to travel, causing province's oil consumption and reducing discharging high-volume is not clearly.
Summary of the invention
First purpose of the present invention is the drive system that satisfies the vehicle torsional moment demand when proposing a kind of can travelling in the urban district and can reduce the four-drive hybrid electric vehicle of oil consumption and exhaust emissions.
The drive system of four-drive hybrid electric vehicle of the present invention comprises the driving engine that drives front-wheel, drive motor with coaxial mounted ISG motor of driving engine and driving trailing wheel, described driving engine links to each other with the engine management unit, described ISG motor links to each other with the ISG motor control unit, described drive motor links to each other with motor control unit, described ISG motor links to each other with high-tension battery by inversion unit with drive motor, key is that this drive system also comprises car load control unit and the high-tension battery administrative unit that links to each other with high-tension battery, described car load control unit, the high-tension battery administrative unit, the engine management unit, the ISG motor control unit links to each other by the CAN bus with motor control unit, and described car load control unit also links to each other with accelerator pedal position sensor and car speed sensor.
Vehicle ' demand torque T can know that detailed process is as follows according to accelerator open degree, car weight, vehicle speed value and radius of wheel r:
Vehicle ' demand power P=F * v, wherein F is the needed propulsive effort of vehicle ', v is the speed of a motor vehicle;
Vehicle ' demand torque T=F * r, wherein F is the needed propulsive effort of vehicle ', r is a radius of wheel;
Can derive by above-mentioned formula: vehicle ' demand torque T=P * r/v.
Wherein vehicle ' demand power P when accelerator open degree is bigger, just illustrates that vehicle ' demand power P is bigger by the aperture decision of gas, and vice versa, and both are proportional relation.Radius of wheel r is a fixed value, and speed of a motor vehicle v can be known that promptly the car load control unit can be learnt vehicle ' demand torque T by the signal of accelerator pedal position sensor and car speed sensor by car speed sensor.The car load control unit is gathered the charged information of battery by the high-tension battery administrative unit; and carry out the adjustment of drive pattern according to torque demand and speed information; satisfying the vehicle torsional moment demand and keeping under the prerequisite of cell safety electric weight; preferentially utilize drive motor and ISG motor-driven; when particularly travelling in the urban district of the frequent start-stop of needs; also can realize the idle stop function; when meeting traffic lights with tail-off; stop control lever; and when vehicle need start, utilize drive motor quick operated start vehicle, require and reduction oil consumption and exhaust emissions to satisfy to start.
For utilizing the automobile brake energy electric energy supplement, this drive system also comprises and car load control unit bonded assembly brake pedal sensor, like this after the car load control unit detects brake pedal and depresses, promptly control the generating of ISG motor and/or drive motor, and with electrical power storage in battery, make full use of the braking energy of automobile, reduce oil consumption and exhaust emissions.
For avoiding inconsistent meaningless loss and the unnecessary wearing and tearing of tire that cause driving energy of the front and rear wheel rotating speed of automobile under the four wheel drive pattern, above-mentioned drive system also comprises two tachogens that are installed in respectively on the automobile front and rear wheel, and described tachogen links to each other with the car load control unit.The car load control unit just can be regulated the rotating speed of drive motor according to the rotating speed of automobile front and rear wheel like this, and the front and rear wheel rotating speed of automobile is consistent, and improves to drive energy utilization ratio.
For the power supply that makes whole drive system keeps consistency, be unlikely to cause the signal disorder because of the power supply above earth potential difference of each control unit, guarantee the reliability of driving control system, described car load control unit, high-tension battery administrative unit, engine management unit, ISG motor control unit and motor control unit utilize high-tension battery to power through step-down.
Second purpose of the present invention is the driven management method that proposes the drive system of above-mentioned four-drive hybrid electric vehicle, makes automobile more fuel-efficient and emission abatement under the prerequisite that satisfies the dynamic property requirement.
The driven management method of the drive system of four-drive hybrid electric vehicle of the present invention comprises chaufeur setting drive pattern and automatic guidance drive pattern, and key is that described automatic guidance drive pattern comprises the steps:
A: the car load control unit is gathered the gas opening information by accelerator pedal position sensor, gather actual vehicle speed information V by car speed sensor, gather the charged information SOC of battery by the high-tension battery administrative unit, and calculate the torque demand information T of vehicle;
B: the car load control unit compares actual vehicle speed V and the preset vehicle speed V0 that collects, and when actual vehicle speed V is lower than preset vehicle speed V0, carries out the C1 step, otherwise carries out the C2 step;
C1:, otherwise carry out the D step if torque demand T less than drive motor torque peak T_motor, carries out the C11 step;
C11: if the charged information SOC of battery is greater than battery charge lower bound threshold values SOCL, then the car load control unit adopts drive motor independent drive pattern; Otherwise the car load control unit adopts driving engine independent drive pattern;
C2: less than drive motor torque peak T_motor, then the car load control unit adopts driving engine independent drive pattern as if torque demand T, otherwise carries out the D step;
D: greater than drive motor torque peak T_motor and less than maximum engine torque T_engine, then the car load control unit adopts driving engine independent drive pattern as if torque demand T; Otherwise carry out the E step;
E:, otherwise carry out the F step if torque demand T greater than maximum engine torque T_engine and less than maximum engine torque T_engine and ISG motor maximum torque T_motorI sum, carries out the E1 step;
E1: if the charged information SOC of battery is greater than battery charge lower bound threshold values SOCL, then the car load control unit adopts driving engine and the common drive pattern of ISG motor; Otherwise the car load control unit adopts driving engine independent drive pattern and sends the alarm that moment of torsion can not satisfy the demands;
F: if torque demand T is greater than maximum engine torque T_engine and ISG motor maximum torque T_motorI sum and less than maximum engine torque T_engine, ISG motor maximum torque T_motorI and drive motor torque peak T_motor sum, carry out the F1 step, otherwise carry out the H step;
F1: if the charged information SOC of battery is greater than battery charge lower bound threshold values SOCL, then the car load control unit adopts driving engine, ISG motor and the common drive pattern of drive motor; Otherwise the car load control unit adopts driving engine independent drive pattern and sends the alarm that moment of torsion can not satisfy the demands;
H: the car load control unit adopts driving engine independent drive pattern and sends the alarm that moment of torsion can not satisfy the demands.
Above-mentioned chaufeur is set drive pattern will have precedence over the automatic guidance drive pattern, automobile is at first selected drive pattern under the order of chaufeur, have only after chaufeur is selected the automatic guidance drive pattern, entire car controller just can wait the drive pattern of Control of Automobile according to the condition of setting and torque demand, speed information.
In above-mentioned B step, entire car controller is selected different drive patterns according to the difference of the speed of a motor vehicle, when being in fast state, can only adopt by automobile driving engine independent drive pattern, this is because if take pure motor driving during fast state, run at high speed so and can consume battery electric quantity very soon, and driving engine economy when high rotation speed operation is relative with emission performance better, therefore adopts engine drive when running at high speed as far as possible, and does not adopt electric-only mode.
When the car load control unit detects that brake pedal depresses or after the speed of a motor vehicle is higher than predetermined value and Das Gaspedal and is totally released, promptly control the generating of ISG motor and/or drive motor, like this when utilizing ISG motor and/or drive motor to brake, can also make full use of braking energy, battery electric quantity is replenished.When the speed of a motor vehicle is lower than predetermined value and Das Gaspedal and unclamps, rely on ground-surface resistance that vehicle is slowly braked, and the braking energy of this moment is not a lot, therefore need not to utilize the generating of ISG motor and/or drive motor.
Under above-mentioned automatic guidance drive pattern, when entire car controller adopts driving engine, ISG motor and the common drive pattern of drive motor, entire car controller detects the velocity contrast of front and rear wheel by the tachogen that is installed on the front and rear wheel, and the rotating speed of regulating drive motor is consistent the speed of front and rear wheel.
When the charged information SOC of battery was less than or equal to battery charge lower bound threshold values SOCL, car load control unit control driving engine drove the ISG electric power generation.So at any time, battery charge state is monitored, and in time be battery charge, make the carrying capacity of battery be higher than battery charge lower bound threshold values SOCL as far as possible, be in the state that can be used for drive motor, can avoid causing drive pattern single, can't satisfy the torque demand of vehicle because of battery electric quantity is not enough.
When battery be charged to battery charge state signal value SOC greater than the high limit of default battery charge threshold values SOCH after, car load control unit control driving engine and the generation outage of ISG motor.The window ranges of battery charge is set; just stop charging when battery is higher than the high limit of battery charge threshold values SOCH, rather than in a single day battery electric quantity be higher than battery charge lower bound threshold values SOCL and promptly stop charging, so just can not be frequently to battery charge; can protect battery, prolong the service life of battery.
Entire car controller in the drive system of four-drive hybrid electric vehicle of the present invention with the position signal of Das Gaspedal as the demand order of chaufeur to vehicular drive moment, obtain the requirements of vehicle by calculating to power, and and driving engine, the torque peak that ISG motor and drive motor can be exported compares, on the basis of the charged information of reference high-tension battery, select suitable drive pattern, make automobile guarantee the cell safety electric weight and satisfy under the prerequisite of torque demand, adopt electric model as far as possible, oil consumption and exhaust emissions have been reduced, avoided traditional four-drive hybrid electric vehicle not consider battery charge information, cause the battery short of electricity easily and can't adopt the 4 wheel driven pattern, thereby make drive pattern single, can't satisfy the vehicle torsional moment demand and cause the oil consumption rising and the drawback of exhaust emissions aggravation.
Description of drawings
Fig. 1 is the structural representation of drive system of the four-drive hybrid electric vehicle of embodiment 1.
The specific embodiment
Describe the present invention in detail below in conjunction with specific embodiments and the drawings.
Embodiment 1:
As shown in Figure 1, the drive system of the four-drive hybrid electric vehicle of present embodiment comprises the driving engine that drives front-wheel, drive motor with coaxial mounted ISG motor of driving engine and driving trailing wheel, described driving engine links to each other with the engine management unit, described ISG motor links to each other with the ISG motor control unit, described drive motor links to each other with motor control unit, described ISG motor links to each other with high-tension battery by inversion unit with drive motor, this drive system also comprises car load control unit and the high-tension battery administrative unit that links to each other with high-tension battery, described car load control unit, the high-tension battery administrative unit, the engine management unit, the ISG motor control unit links to each other by the CAN bus with motor control unit, described car load control unit also with accelerator pedal position sensor, car speed sensor, before brake pedal sensor reaches, two tachogens on the trailing wheel link to each other.
As shown in phantom in FIG., car load control unit, high-tension battery administrative unit, engine management unit, ISG motor control unit and motor control unit utilize the step-down of high-tension battery process DC-DC voltage transformer to power.
In the drive system of the four-drive hybrid electric vehicle of present embodiment, high-tension battery administrative unit, engine management unit, ISG motor control unit and motor control unit pass through the total line control of CAN by entire car controller, thereby high-tension battery, driving engine, ISG motor and drive motor are managed, and above-mentioned ISG motor and drive motor all have electronic and two kinds of mode of operations of generating.
The driven management method of the drive system of the four-drive hybrid electric vehicle of present embodiment comprises chaufeur setting drive pattern and automatic guidance drive pattern, and wherein the automatic guidance drive pattern comprises the steps:
A: the car load control unit is gathered the gas opening information by accelerator pedal position sensor, gather actual vehicle speed information V by car speed sensor, gather the charged information SOC of battery by the high-tension battery administrative unit, and calculate the torque demand information T of vehicle;
B: the car load control unit compares actual vehicle speed V and the preset vehicle speed V0 that collects, and when actual vehicle speed V is lower than preset vehicle speed V0, carries out the C1 step, otherwise carries out the C2 step;
C1:, otherwise carry out the D step if torque demand T less than drive motor torque peak T_motor, carries out the C11 step;
C11: if the charged information SOC of battery is greater than battery charge lower bound threshold values SOCL, then the car load control unit adopts drive motor independent drive pattern; Otherwise the car load control unit adopts driving engine independent drive pattern;
C2: less than drive motor torque peak T_motor, then the car load control unit adopts driving engine independent drive pattern as if torque demand T, otherwise carries out the D step;
D: greater than drive motor torque peak T_motor and less than maximum engine torque T_engine, then the car load control unit adopts driving engine independent drive pattern as if torque demand T; Otherwise carry out the E step;
E:, otherwise carry out the F step if torque demand T greater than maximum engine torque T_engine and less than maximum engine torque T_engine and ISG motor maximum torque T_motorI sum, carries out the E1 step;
E1: if the charged information SOC of battery is greater than battery charge lower bound threshold values SOCL, then the car load control unit adopts driving engine and the common drive pattern of ISG motor; Otherwise the car load control unit adopts driving engine independent drive pattern and sends the alarm that moment of torsion can not satisfy the demands;
F: if torque demand T is greater than maximum engine torque T_engine and ISG motor maximum torque T_motorI sum and less than maximum engine torque T_engine, ISG motor maximum torque T_motorI and drive motor torque peak T_motor sum, carry out the F1 step, otherwise carry out the H step;
F1: if the charged information SOC of battery is greater than battery charge lower bound threshold values SOCL, then the car load control unit adopts driving engine, ISG motor and the common drive pattern of drive motor; Otherwise the car load control unit adopts driving engine independent drive pattern and sends the alarm that moment of torsion can not satisfy the demands;
H: the car load control unit adopts driving engine independent drive pattern and sends the alarm that moment of torsion can not satisfy the demands.
Above-mentioned chaufeur is set drive pattern will have precedence over the automatic guidance drive pattern, automobile is at first selected drive pattern under the order of chaufeur, have only after chaufeur is selected the automatic guidance drive pattern, entire car controller just can wait the drive pattern of Control of Automobile according to the condition of setting and torque demand, speed information.
In above-mentioned B step, entire car controller is selected different drive patterns according to the difference of the speed of a motor vehicle, when being in fast state, can only adopt by automobile driving engine independent drive pattern, this is because if take pure motor driving during fast state, run at high speed so and can consume battery electric quantity very soon, and driving engine economy when high rotation speed operation is relative with emission performance better, therefore adopts engine drive when running at high speed as far as possible, and does not adopt electric-only mode.
When the car load control unit detects that brake pedal depresses or after the speed of a motor vehicle is higher than predetermined value and Das Gaspedal and is totally released, promptly control the generating of ISG motor and/or drive motor, like this when utilizing ISG motor and/or drive motor to brake, can also make full use of braking energy, battery electric quantity is replenished.When the speed of a motor vehicle is lower than predetermined value and Das Gaspedal and unclamps, rely on ground-surface resistance that vehicle is slowly braked, and the braking energy of this moment is not a lot, therefore need not to utilize the generating of ISG motor and/or drive motor.
Under above-mentioned automatic guidance drive pattern, when entire car controller adopts driving engine, ISG motor and the common drive pattern of drive motor, entire car controller detects the velocity contrast of front and rear wheel by the tachogen that is installed on the front and rear wheel, and the rotating speed of regulating drive motor is consistent the speed of front and rear wheel.
When the charged information SOC of battery was less than or equal to battery charge lower bound threshold values SOCL, car load control unit control driving engine drove the ISG electric power generation.So at any time, battery charge state is monitored, and in time be battery charge, make the carrying capacity of battery be higher than battery charge lower bound threshold values SOCL as far as possible, be in the state that can be used for drive motor, can avoid causing drive pattern single, can't satisfy the torque demand of vehicle because of battery electric quantity is not enough.
When battery be charged to battery charge state signal value SOC greater than the high limit of default battery charge threshold values SOCH after, car load control unit control driving engine and the generation outage of ISG motor.The window ranges of battery charge is set; just stop charging when battery is higher than the high limit of battery charge threshold values SOCH, rather than in a single day battery electric quantity be higher than battery charge lower bound threshold values SOCL and promptly stop charging, so just can not be frequently to battery charge; can protect battery, prolong the service life of battery.

Claims (9)

1, a kind of drive system of four-drive hybrid electric vehicle, comprise the driving engine that drives front-wheel, drive motor with coaxial mounted ISG motor of driving engine and driving trailing wheel, described driving engine links to each other with the engine management unit, described ISG motor links to each other with the ISG motor control unit, described drive motor links to each other with motor control unit, described ISG motor links to each other with high-tension battery by inversion unit with drive motor, it is characterized in that this drive system also comprises car load control unit and the high-tension battery administrative unit that links to each other with high-tension battery, described car load control unit, the high-tension battery administrative unit, the engine management unit, the ISG motor control unit links to each other by the CAN bus with motor control unit, and described car load control unit also links to each other with accelerator pedal position sensor and car speed sensor.
2, the drive system of four-drive hybrid electric vehicle according to claim 1 is characterized in that this drive system also comprises and car load control unit bonded assembly brake pedal sensor.
3, the drive system of four-drive hybrid electric vehicle according to claim 1 is characterized in that this drive system also comprises two tachogens that are installed in respectively on the automobile front and rear wheel, and described tachogen links to each other with the car load control unit.
4,, it is characterized in that described car load control unit, high-tension battery administrative unit, engine management unit, ISG motor control unit and motor control unit utilize high-tension battery to power through step-down according to the drive system of claim 1 or 2 or 3 described four-drive hybrid electric vehicles.
5, a kind of driven management method of drive system of four-drive hybrid electric vehicle comprises chaufeur setting drive pattern and automatic guidance drive pattern, it is characterized in that described automatic guidance drive pattern comprises the steps:
A: the car load control unit is gathered the gas opening information by accelerator pedal position sensor, gather actual vehicle speed information V by car speed sensor, gather the charged information SOC of battery by the high-tension battery administrative unit, and calculate the torque demand information T of vehicle;
B: the car load control unit compares actual vehicle speed V and the preset vehicle speed V0 that collects, and when actual vehicle speed V is lower than preset vehicle speed V0, carries out the C1 step, otherwise carries out the C2 step;
C1:, otherwise carry out the D step if torque demand T less than drive motor torque peak T_motor, carries out the C11 step;
C11: if the charged information SOC of battery is greater than battery charge lower bound threshold values SOCL, then the car load control unit adopts drive motor independent drive pattern; Otherwise the car load control unit adopts driving engine independent drive pattern;
C2: less than drive motor torque peak T_motor, then the car load control unit adopts driving engine independent drive pattern as if torque demand T, otherwise carries out the D step;
D: greater than drive motor torque peak T_motor and less than maximum engine torque T_engine, then the car load control unit adopts driving engine independent drive pattern as if torque demand T; Otherwise carry out the E step;
E:, otherwise carry out the F step if torque demand T greater than maximum engine torque T_engine and less than maximum engine torque T_engine and ISG motor maximum torque T_motorI sum, carries out the E1 step;
E1: if the charged information SOC of battery is greater than battery charge lower bound threshold values SOCL, then the car load control unit adopts driving engine and the common drive pattern of ISG motor; Otherwise the car load control unit adopts driving engine independent drive pattern and sends the alarm that moment of torsion can not satisfy the demands;
F: if torque demand T is greater than maximum engine torque T_engine and ISG motor maximum torque T_motorI sum and less than maximum engine torque T_engine, ISG motor maximum torque T_motorI and drive motor torque peak T_motor sum, carry out the F1 step, otherwise carry out the H step;
F1: if the charged information SOC of battery is greater than battery charge lower bound threshold values SOCL, then the car load control unit adopts driving engine, ISG motor and the common drive pattern of drive motor; Otherwise the car load control unit adopts driving engine independent drive pattern and sends the alarm that moment of torsion can not satisfy the demands;
H: the car load control unit adopts driving engine independent drive pattern and sends the alarm that moment of torsion can not satisfy the demands.
6, the driven management method of the drive system of four-drive hybrid electric vehicle according to claim 5, it is characterized in that under the automatic guidance drive pattern, when entire car controller adopts driving engine, ISG motor and the common drive pattern of drive motor, entire car controller detects the velocity contrast of front and rear wheel by the tachogen that is installed on the front and rear wheel, and the rotating speed of regulating drive motor is consistent the speed of front and rear wheel.
7, the driven management method of the drive system of four-drive hybrid electric vehicle according to claim 5, it is characterized in that detecting that brake pedal depresses or after the speed of a motor vehicle is higher than predetermined value and Das Gaspedal and is totally released, promptly controlling the generating of ISG motor and/or drive motor when the car load control unit.
8, according to the driven management method of the drive system of claim 5 or 6 or 7 described four-drive hybrid electric vehicles, it is characterized in that when the charged information SOC of battery is less than or equal to battery charge lower bound threshold values SOCL car load control unit control driving engine drives the ISG electric power generation.
9, the driven management method of the drive system of four-drive hybrid electric vehicle according to claim 8, it is characterized in that when battery be charged to battery charge state signal value SOC greater than the high limit of default battery charge threshold values SOCH after, car load control unit control driving engine and the generation outage of ISG motor.
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