KR20150041323A - Method for controlling HEV mode of hybrid vehicle - Google Patents

Method for controlling HEV mode of hybrid vehicle Download PDF

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Publication number
KR20150041323A
KR20150041323A KR20130119708A KR20130119708A KR20150041323A KR 20150041323 A KR20150041323 A KR 20150041323A KR 20130119708 A KR20130119708 A KR 20130119708A KR 20130119708 A KR20130119708 A KR 20130119708A KR 20150041323 A KR20150041323 A KR 20150041323A
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KR
South Korea
Prior art keywords
hev
relay
hybrid vehicle
entry
mode
Prior art date
Application number
KR20130119708A
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Korean (ko)
Inventor
이재문
Original Assignee
현대자동차주식회사
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Priority to KR20130119708A priority Critical patent/KR20150041323A/en
Publication of KR20150041323A publication Critical patent/KR20150041323A/en

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    • 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
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • 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
    • B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

The present invention relates to a hybrid electric vehicle (HEV) mode entry control method for a hybrid vehicle capable of improving drivability and fuel efficiency of the hybrid vehicle. Namely, the present invention provides the HEV mode entry control method for a hybrid vehicle preventing the unnecessary operation of an engine by controlling to delay an HEV mode entry request until gear shifting is completed when entry to the HEV driving mode from an electric vehicle (EV) mode is requested while shifting gears in the middle of a drive to improve drivability and fuel efficiency at the same time. The HEV mode entry control method for a hybrid vehicle includes a step of determining the completion of the gear shifting in the middle of a drive; a step of determining whether the entry to the HEV driving mode from the EV mode is requested or not; and a step of determining whether an engine clutch is locked up or not.

Description

[0001] The present invention relates to a method for controlling an HEV entry of a hybrid vehicle,

The present invention relates to a HEV entry control method of a hybrid vehicle capable of improving the operability and fuel economy of a hybrid vehicle.

Hybrid vehicles, which are one of eco-friendly vehicles, are capable of reducing exhaust gas and improving fuel economy by employing motors as power sources as well as engines. They are used to transmit engine or motor power to a traveling wheel, It is equipped with a power transmission system that transmits to the driving wheels.

The conventional hybrid vehicle power transmission system is arranged between the engine 1 and the motor 2 directly connected to each other, the engine 1 and the motor 2, as shown in Fig. 5, , A transmission 4 for outputting power by shifting the power to the traveling wheel 6 and a generator 5 connected to the crank pulley of the engine for starting and generating the engine .

In the hybrid vehicle having such a power transmission device, an EV (electric vehicle) mode, which is a pure electric vehicle mode using only motor power, and a hybrid electric vehicle (HEV) mode, And a regenerative braking (RB) mode for recovering braking and inertia energy of the vehicle when the vehicle is running due to braking or inertia, through power generation in the motor and charging the battery.

In the hybrid vehicle power transmission system, the driving force can be secured by using the motor instead of the engine in the running condition requiring the constant speed running and the small output, and at the same time, the fuel efficiency can be improved. In addition to operating at a good operating point, insufficient output and over-power provide the advantage of significantly improving fuel efficiency compared to conventional internal combustion engine vehicles, as the motor is driven or developed.

However, when engaging and shifting of the engine clutch occur at the same time when the above-mentioned hybrid vehicle is entered (shifted) from the EV traveling mode to the HEV traveling mode, unnecessary engine starting is generated to lower the drivability .

In the hybrid vehicle, the driver's demand depends on the operating depth of the Accel-pedal Position Sensor (APS) and Braking Position Sensor (BPS). As shown in the attached FIG. 4, the driver's request And the APS is repeatedly operated on and off based on the operation of depressing and releasing the accelerator pedal, the gear shift of the transmission is performed.

At this time, referring to the portion indicated by the arrow in FIG. 4, there is a case where the driver's request is positioned (reflected) in the hysteresis region where the HEV entry decision is not clear at the time when the gear shifting of the transmission ends.

Therefore, when the engine enters the HEV running mode (transition) from the EV running mode, engagement of the engine clutch is performed so as to reflect the driver's demand in the hysteresis region together with the shifting of the transmission as described above, Unnecessary engine starting (indicated by a hint line in Fig. 4) occurs, which causes deterioration of fuel economy and deterioration of operability.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a hybrid vehicle having a hybrid vehicle, The present invention aims to provide an HEV entry control method for a hybrid vehicle in which unnecessary engine start-up is prevented, thereby improving the operability and the fuel consumption at the same time.

According to an aspect of the present invention, there is provided a hybrid vehicle including: a hybrid vehicle; Determining whether an entry request from the EV traveling mode to the HEV traveling mode is present; Determining whether the engine clutch is in a lockup state; Wherein the hybrid vehicle is controlled so as to delay the HEV entry request until the end of the shift when the engine clutch is in the lock-up state while the HEV traveling mode entry request is present in the shifting state. Provides an entry control method.

The control for delaying the HEV entry request to the end of the shift according to the preferred embodiment of the present invention is performed by a method for resetting the relay for determining the HEV traveling mode entry determination.

In particular, the method of resetting the relay comprises: comparing a reset input signal value input to the relay with a predetermined relay-on value; Turning on the relay if the reset input signal value is greater than the relay on value, and turning off the relay if the reset input signal value is less than the predetermined relay off value or the relay on value and the relay off value; .

Through the above-mentioned means for solving the problems, the present invention provides the following effects.

According to the present invention, when a shift is made while the hybrid vehicle is running, and when an HEV traveling mode transition (entry) is requested in the EV traveling mode, control is performed to delay the HEV entry request until the end of the shift, It is possible to prevent unnecessary engine starting from being generated simultaneously with engagement and shifting of the clutch, thereby improving the operability and fuel economy of the hybrid vehicle at the same time.

1 is a flowchart showing a HEV entry control method of a hybrid vehicle according to the present invention,
2 is a control block diagram showing a HEV entry control method of a hybrid vehicle according to the present invention,
3 is a flowchart showing a method of resetting a relay for HEV traveling mode entry decision, which is a HEV entry control method of a hybrid vehicle according to the present invention,
FIG. 4 is a waveform chart explaining a problem when the HEV enters the hybrid vehicle,
5 is a power transmission system diagram of a hybrid vehicle.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As described above, during traveling of the hybrid vehicle, the APS is repeatedly turned on and off based on the driver's request, thereby shifting the transmission gear.

At this time, there is a case where the driver's request is positioned (reflected) in the hysteresis region where the HEV entry decision is not definite at the time when the gear shifting is not completely completed in the section where the gear shifting of the transmission is finished.

Therefore, when a shift is made while the hybrid vehicle is traveling, when an entry request is made from the EV traveling mode to the HEV traveling mode, engaged of the engine clutch is performed to reflect the driver's demand in the hysteresis region together with the shift of the transmission, Unnecessary engine start-up due to the joining of the engine clutch occurs before entering the HEV, thereby deteriorating the fuel economy and reducing the operability.

In order to solve such conventional problems, the present invention provides a control system for a hybrid vehicle in which, when a shift is made while the hybrid vehicle is running, when an HEV traveling mode transition (entry) is requested in the EV traveling mode, So that it is possible to prevent unnecessary engine starting from occurring, thereby improving the operability and the fuel consumption of the hybrid vehicle at the same time.

Hereinafter, a method of controlling the HEV of the hybrid vehicle according to the present invention will be described.

FIG. 1 is a flowchart showing a HEV entry control method of a hybrid vehicle according to the present invention, and FIG. 2 is a control block diagram.

First, a step of determining whether or not the shift is completed at the time of traveling of the hybrid vehicle is preceded.

That is, the transition from the EV driving mode to the HEV driving mode or from the HEV driving mode to the EV driving mode is performed when the APS is repeatedly operated on and off according to the driver's request, It is determined whether or not the gear shift is completed when the gear shift of the transmission is performed in each running mode.

Subsequently, it is determined whether or not there is a request to enter the HEV running mode in the EV running mode before the end of the gear shift.

Next, if there is a request to enter the HEV running mode before the end of the gear shift, it is determined whether or not the engine clutch is in the lockup state.

At this time, there is a request to enter the HEV traveling mode before the gearshift end (shifting is not yet completed), and when the engine clutch is in the lock-up state, control is performed to delay the HEV entry request to the shift ending point.

In other words, even if the engine clutch is in the lock-up state to enter the HEV driving mode before the gear shift is terminated (the shift is not yet finished) and before the shift is completely terminated Control to delay the HEV entry request until the end of the shift is performed.

Therefore, when there is a request for entry (transition) from the EV traveling mode to the HEV traveling mode during the shifting of the transmission, the engine clutch is engaged to reflect the driver's demand in the hysteresis region just before the gearshift of the transmission, Unnecessary engine start-up due to the joining of the engine clutch occurs before entry, thereby deteriorating the fuel economy and reducing the operability.

That is, when there is a request for entry (transition) from the EV traveling mode to the HEV traveling mode during the shifting of the hybrid vehicle, by controlling the delay of the HEV entry request until the end of the shift, It is possible to prevent unnecessary engine starting from occurring, thereby improving the operability and the fuel consumption of the hybrid vehicle at the same time.

On the other hand, the control for delaying the HEV entry request until the end of the shift is performed by a method for resetting the relay for determining the HEV running mode entry.

The relay for determining whether to enter the HEV mode is applied to prevent repeated occurrence of the HEV traveling mode on-off phenomenon. A request to enter the HEV traveling mode is made when the relay is on, and a request to enter the HEV traveling mode is blocked when the relay is off .

In the method of resetting the relay, first, a reset input signal value input to the relay is compared with a pre-set relay ON value, and if the reset input signal value is greater than the relay ON value, the relay is turned on to request the HEV driving mode entry request .

On the other hand, if the reset input signal value is smaller than a predetermined relay off value or if the relay ON value is between the relay ON value and the relay OFF value, the relay is turned off, thereby blocking and delaying the HEV driving mode entry request.

As described above, according to the present invention, when there is a request for entry (transition) from the EV traveling mode to the HEV traveling mode during the shifting of the hybrid vehicle, by controlling the delay of the HEV entry request until the end of the shift, It is possible to prevent unnecessary engine start-up from occurring before entering the HEV driving mode, thereby improving the operability and the fuel consumption of the hybrid vehicle at the same time.

Claims (3)

Determining whether or not a shift is completed at the time of traveling of the hybrid vehicle;
Determining whether an entry request from the EV traveling mode to the HEV traveling mode is present;
Determining whether the engine clutch is in a lockup state;
Lt; / RTI >
Wherein control is performed to delay the HEV entry request until the end of the shift when the engine clutch is in the lock-up state while the HEV traveling mode entry request is present in the shift completion state.
The method according to claim 1,
The control for delaying the HEV entry request until the end of the shift is performed by:
And resetting the relays for HEV traveling mode entry determination.
The method of claim 2,
The method of resetting the relay comprises:
Comparing a reset input signal value input to the relay with a predetermined relay ON value;
Turning on the relay if the reset input signal value is greater than the relay on value, and turning off the relay if the reset input signal value is less than the predetermined relay off value or the relay on value and the relay off value;
Wherein the HEV entry control method comprises the steps of:
KR20130119708A 2013-10-08 2013-10-08 Method for controlling HEV mode of hybrid vehicle KR20150041323A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101704297B1 (en) 2015-11-30 2017-02-07 현대자동차주식회사 Method for controlling trnasmission of hybrid vehicle
KR20180134190A (en) * 2017-06-08 2018-12-18 현대자동차주식회사 Hybrid vehicle and method of controlling transmission pattern for the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101704297B1 (en) 2015-11-30 2017-02-07 현대자동차주식회사 Method for controlling trnasmission of hybrid vehicle
KR20180134190A (en) * 2017-06-08 2018-12-18 현대자동차주식회사 Hybrid vehicle and method of controlling transmission pattern for the same

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