JP5176789B2 - Engine oil pan - Google Patents

Description

  The present invention relates to an engine oil pan in which the temperature of oil to be supplied rises rapidly.

  Oil is circulated in the engine to lubricate a mechanism such as a bearing that rotates and reciprocates. Oil accumulates in an oil pan installed at the bottom of the engine.

  As shown in FIG. 2, the conventional oil pan 21 has a bottom plate 2, a wall plate 3 surrounding the bottom plate 2 and raised from the bottom plate 2, and on the bottom plate 2 surrounded by the wall plate 3. In this space, oil that flows back from a mechanism such as a bearing (hereinafter referred to as a customer) is accumulated.

  An oil strainer inlet 7 is installed in the space of the oil pan 21. The oil strainer inlet 7 is connected to the oil pump 8.

  When the engine is driven, the oil pump 8 sucks up the oil in the oil pan 21 from the oil strainer suction port 7, and the sucked up oil is supplied to the customer. The oil that has passed through the customer flows down and returns to the oil pan 21. When the engine is stopped, the oil pump 8 does not suck up the oil, so that the oil accumulated in the oil pan 21 is accumulated as it is, and the oil left in the demand destination flows down and returns to the oil pan 21.

  Oil has the property that the viscosity is low when the temperature is high and the viscosity is high when the temperature is low.

  When the engine is cold started, the oil viscosity is high because the temperature of the oil in the oil pan 21 is low. Thereafter, it takes time for the temperature of the oil in the oil pan 21 to rise to such an extent that the viscosity of the oil is sufficiently low. From the time when the engine is cold-started, until the temperature of the oil in the oil pan 21 rises to such an extent that the viscosity of the oil is sufficiently low, high-viscosity oil continues to be supplied to the customers. Therefore, during this time, the friction at the customer is large and the lubrication is poor. As a result, the fuel consumption of the engine is unnecessarily increased until the temperature of the oil in the oil pan 21 rises.

  Accordingly, an object of the present invention is to solve the above-described problems and provide an oil pan for an engine in which the temperature of oil to be supplied rises rapidly.

In order to achieve the above object, the present invention includes a bottom plate and a wall plate that surrounds the bottom plate and is raised from the bottom plate. In the engine oil pan that accumulates the oil that flows back and flows down, a partition plate that divides the space into a short-term circulation space where an oil strainer suction port is installed and a long-term storage space, and an upper portion of the long-term storage space A baffle plate inclined toward the space for short-term circulation, and the short-term circulation space provided in the partition plate when the oil temperature is low, shuts off the short-term circulation space and the long-term storage space, and when the oil temperature is high and a switch valve for communicating the use space and the long-term storage space, the height of the partition plate is higher than the oil surface height when the plant is operated continuously the engine, the oil level height when the engine is stopped The upper end of the baffle plate is positioned above the wall plate on the long-term storage space side, extends obliquely downward from the upper end, and extends to the short-term circulation space side beyond the partition plate, and , And is arranged so as to form a gap between the upper end of the partition plate .

An oil drain plug is provided on the bottom plate on the long-term storage space side, and the partition plate is formed with an opening that communicates the short-term circulation space and the long-term storage space. The thermostat plate has a fixed end fixed at the upper end of the opening and has a lower end at the free end. The thermostat plate separates the free end from the opening toward the long-term storage space when communicating with the opening. It may be made like.

  The present invention exhibits the following excellent effects.

  (1) The temperature of the oil supplied to the customer can be quickly raised.

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

  As shown in FIG. 1, an oil pan 1 of an engine according to the present invention includes a bottom plate 2 and a wall plate 3 surrounding the bottom plate 2 and raised from the bottom plate 2, and is surrounded by the wall plate 3. In the oil pan 1 of the engine for accumulating oil that flows back from the customer in the space above the bottom plate 2, the space is divided into a space S for short-term circulation and a space L for long-term accumulation, and a partition lower than the wall plate 3. The plate 4, the baffle plate 5 that covers the upper part of the long-term storage space L and is inclined toward the short-term circulation space S, and the short-term circulation space S and the long-term storage space L are shut off when the oil temperature is low. Is provided with an on-off valve 6 for communicating the short-term circulation space S and the long-term storage space L.

  In the space S for short-term circulation, an oil strainer suction port 7 is installed close to the bottom plate 2. The oil strainer inlet 7 is connected to the oil pump 8.

  The bottom plate 2 is substantially flat. An oil drain plug 9 is provided on the bottom plate 2 on the long-term storage space L side.

  The partition plate 4 is higher than the oil level height P1 when the engine is operating (not immediately after starting but operating for a certain long time) and lower than the oil level height P0 when the engine is stopped.

  The on-off valve 6 is incorporated in the partition plate 4. That is, the partition plate 4 is formed with an opening for communicating the short-term circulation space S and the long-term storage space L, and the on-off valve 6 is provided so as to block the opening. The on-off valve 6 is composed of a thermostat plate having a fixed end fixed to one end of the opening and a free end opposite to the fixed end. When the temperature is low, the free end of the thermostat plate comes into close contact with the opposite end of the opening, thereby blocking the opening. When the temperature is high, the free end of the thermostat plate is spaced from the opposite end of the opening, thereby communicating the opening.

  Hereinafter, the operation of the oil pan 1 of the present invention will be described.

  When the engine is stopped, the oil is accumulated in the oil pan 1 up to the oil level height P0. Since the oil level height P0 is higher than that of the partition plate 4, the oil level height P0 is common to both the short-term circulation space S and the long-term accumulation space L.

  It is assumed that the temperature of the oil accumulated in the oil pan 1 is low and the on-off valve 6 is shut off.

  When the engine is cold-started, the oil pump 8 sucks oil from the oil strainer suction port 7 from the short-term circulation space S of the oil pan 1, and the sucked oil is supplied to the customer. When the oil level gradually decreases and becomes lower than the partition plate 4, the oil cannot move from the long-term storage space L beyond the partition plate 4, and the oil is sucked up only from the short-term circulation space S.

  The oil that has passed through the customer flows down to the baffle plate 5. Since the baffle plate 5 covers the upper part of the long-term accumulation space L and is inclined toward the short-term circulation space S, the oil that has flowed down does not flow into the long-term accumulation space L, but flows over the baffle plate 5. Return to the short-circulation space S.

  In this state, the oil is circulated only between the short-term circulation space S and the customer, and the oil accumulated in the long-term accumulation space L is not used for circulation. For this reason, when the oil warmed by the customer returns to the short-term circulation space S, it joins with a small amount of oil accumulated in the short-term circulation space S. Therefore, the oil accumulated in the short-term circulation space S The temperature rises quickly. Since oil does not return to the long-term storage space L, the temperature of the oil stored in the long-term storage space L does not rise.

  As described above, in the present invention, the oil circulation immediately after the engine is cold-started is performed in a small amount as compared with the total amount of oil, so that the oil accumulated in the short-term circulation space S has a temperature. Ascend quickly. As the temperature of the oil increases, the viscosity of the oil decreases, the friction at the customer site is large, and the poor lubrication is quickly resolved. As a result, an increase in fuel consumption of the engine is suppressed.

  Thereafter, when the temperature of the oil accumulated in the short-term circulation space S is sufficiently increased, the on-off valve 6 causes the short-term circulation space S and the long-term accumulation space L to communicate with each other. As a result, the oil moves from a space with a high oil level to a space with a low oil level, and the oil level in both spaces becomes a uniform oil level P1. At this point, the oil accumulated in the long-term accumulation space L has a low temperature, but the oil accumulated in the short-term circulation space S has a sufficiently high temperature. The temperature is made uniform.

  During the above operation, since the partition plate 4 is lower than the oil level height P0 when the engine is stopped, when the oil strainer suction port 7 in the short-term circulation space S sucks up oil after the engine is started, the partition plate is removed from the long-term storage space L. The oil is replenished to the space S for short-term circulation exceeding 4. Therefore, oil is not discharged to the bottom plate 2 in the short-term circulation space S, and there is no possibility that air is sucked into the oil strainer suction port 7. If the partition plate 4 is too low, the amount of oil circulated immediately after the engine is cold started increases, and the effect of rapidly increasing the oil temperature is weakened. Therefore, the partition plate 4 is preferably higher than the oil level height P1 during engine operation.

  The temperature at which the on-off valve 6 turns from shut-off to communication is determined by the temperature characteristics of the thermostat plate. The thermostat plate should be selected so that the oil temperature quickly rises to a temperature at which the viscosity can be obtained, referring to the viscosity of the oil required by the customer.

It is sectional drawing of the oil pan which shows one Embodiment of this invention. It is sectional drawing of the conventional oil pan.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil pan 2 Bottom plate 3 Wall plate 4 Partition plate 5 Baffle plate 6 On-off valve 7 Oil strainer suction port 8 Oil pump 9 Oil drain plug

Claims (2)

An engine having a bottom plate and a wall plate surrounding the bottom plate and raised from the bottom plate, and storing oil flowing back from a customer in a space on the bottom plate surrounded by the wall plate in the oil pan, the space, and the partition plate which bisects the short-term circulation space and long storage space oil strainer mouthpiece is installed, toward the short circulation space covering an upper part of the long-term storage spatial gradient communicating the baffle plate, and the short circulation space and the long-term storage space when the oil temperature cut off and the short circulation space and the long-term storage space when the oil temperature provided at the partition plate is low is high and a switch valve which, the height of the partition plate is higher than the oil surface height when the plant is operated continuously the engine, is formed below the oil surface height when the engine is stopped, the baffle plate The upper end is located above the wall plate on the long-term storage space side, extends obliquely downward from the upper end and extends to the short-term circulation space side beyond the partition plate, and the upper end of the partition plate An engine oil pan arranged to form a gap therebetween . An oil drain plug is provided on the bottom plate on the long-term storage space side, and the partition plate is formed with an opening that communicates the short-term circulation space and the long-term storage space. The thermostat plate has a fixed end fixed at the upper end of the opening and has a lower end at the free end. The thermostat plate separates the free end from the opening toward the long-term storage space when communicating with the opening. an oil pan according to claim 1, wherein the engine, characterized in that is adapted.

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