JPH0564248B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an oil supply device for a wet clutch that supplies oil to the contact surface of a friction clutch plate of a wet clutch connected to a rotating engine, and is mainly applicable to wet clutches of automobiles. used.

〔overview〕

The present invention is an oil supply device for a wet clutch that supplies oil to the contact surfaces of the friction clutch plates of a clutch, in which an oil reservoir is provided at a position higher than the oil supply point of the clutch, and a constant amount of oil is always kept within a certain range within this oil reservoir. By driving the oil pump to accumulate oil and supplying oil to the clutch via a valve that responds to the opening and closing of the clutch, the oil pump operates only when necessary, saving engine fuel consumption. The present invention is designed to prevent the quality of oil from deteriorating due to unnecessary driving of the oil pump, prolong the life of the oil pump, and provide a simple configuration of the supply device.

[Conventional technology]

Conventionally, wet clutch oil pumps are directly connected to the output shaft of the rotating engine through gears, etc.
Since the rotary engine is always in operation during operation, oil is supplied to the clutch even when the automobile engine is idling, for example.

[Problem that the invention seeks to solve]

However, as mentioned above, operating the oil pump all the time causes energy loss, and in particular, as has recently been the case, circulating high-performance lubricating oil in an oil pump unnecessarily promotes oil deterioration, so it is not a desirable method. Good and difficult.

In addition, a technology has been proposed for controlling oil supply in a wet clutch by increasing the amount of oil supplied when the clutch is released or partially engaged, and decreasing it when the clutch is engaged (Japanese Patent Application Laid-Open No. 132436-1982).
Publication No.).

However, this technology uses an oil pump to directly supply oil from the oil pan to the clutch friction area, and because the oil pump is activated in response to clutch operation, the frequency of pump use depends on the operating condition. This caused the problem that the load on the pump increased.

The object of the present invention is to provide an oil supply device for a wet clutch to overcome these drawbacks.

[Means for solving problems]

The present invention comprises a nozzle for supplying oil to the contact surfaces of a wet clutch, an oil pan in which oil dripping from the contact surfaces of the clutch is collected, and a pump that sucks oil from the oil pan and supplies it to the nozzle. An oil supply device for a wet clutch comprising: an oil reservoir that accumulates oil by the pump and is located at a higher position than the nozzle;
The structure is such that the oil supplied to the nozzle is supplied from this oil reservoir by a drop, and there is a means for detecting the amount of oil accumulated in this oil reservoir, and a means for detecting the amount of oil accumulated in this oil reservoir when the amount of oil detected by this means is less than a predetermined amount. The present invention is characterized by comprising means for driving the pump, a valve provided in a passage between the oil reservoir and the nozzle, and means for controlling the opening and closing of this valve in accordance with the operation of a clutch. .

[Effect]

In the present invention, an oil reservoir is provided at a higher position than the oil supply device of the clutch, an oil amount detection means is provided in the oil reservoir, and the oil pump is operated so that the amount of oil within a certain range is accumulated. , oil is removed from the clutch by the oil head in the oil reservoir, and the oil pump is operated intermittently. In addition, the oil in this oil reservoir is removed by valve operation only when necessary when the clutch is operated.
It is not necessary to operate the oil pump in response to each clutch operation.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment. 1st
In the figure, a nozzle 3 for supplying oil to the clutch contact surface 2 of the wet clutch housing 1;
There is an oil pan 4 that collects the oil dripping from the nozzle 3, and an oil pump 6 that sucks the oil in the oil pan 4 through an oil suction port 5.

Here, the feature of the present invention is that oil is accumulated in an oil reservoir 7 arranged at a higher position than the nozzle 3 by the oil pump 6, and this accumulated oil is caused to drop from the oil reservoir 7. Therefore, the oil is removed from the nozzle 3 via the oil supply amount 8, and the oil reservoir 7 has an upper sonde 9 and a lower sonde 10 that detect the amount of accumulated oil, and a sensor whose oil amount is lower than the lower sonde 10. a motor 6A directly connected to an oil pump 6 controlled by a control circuit 11 including a switch means that is closed when the water level reaches a level higher than that of the upper sonde 9; The present invention includes a valve 12 provided in an oil supply pipe 8, which is a passage between an oil reservoir 7 and a nozzle 3, and a control device 13 that controls opening and closing of this valve 12 according to the operation of a clutch.

In FIG. 1, the operating time rate of the oil pump 6 can be set to an appropriate value by appropriately determining the ratio between the amount of oil transported by the oil pump 6 and the amount of oil removed from the nozzle 3. can.

Further, this control device 13 is related to an automobile transmission that is program-controlled by a microcomputer.

Here, the control device 13 is related to an automobile transmission that is program-controlled by a microcomputer.

A control signal from the control device 13 allows the valve 12 to be opened only when the clutch is disengaged to drain oil to the clutch, thereby preventing unnecessary oil supply to the clutch.

In this embodiment, in the case of an automobile equipped with an ordinary mechanical clutch that does not have the program-controlled control device 13 as described above, a switch is provided on the clutch pedal to detect the engagement/disengagement state of the clutch pedal, and a signal from this switch is used to activate the valve. This can be carried out by opening and closing 12.

FIG. 2 is a sectional view showing a more specific structure of the above embodiment. However, the valve 12 provided midway through the oil supply pipe 8 is not shown.

〔Effect of the invention〕

According to the present invention, there is no need to constantly operate the oil pump in the oil supply device that supplies oil to the contact surfaces of the wet clutch, so the energy for operating the oil pump is efficiently used, and the oil It has the effect of preventing useless deterioration of Furthermore, since the oil pump is not operated in response to clutch operation, the life of the oil pump can be extended.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment according to the present invention. FIG. 2 is a sectional view showing a more specific structure of the above embodiment. 1... Wet type clutch housing, 2... Clutch contact surface, 3... Nozzle, 4... Oil pan, 5... Oil suction port, 6... Oil pump, 6A... Motor, 7... Oil reservoir, 8... Oil supply pipe, 9... Upper part Sonde, 1
0...lower sonde, 11...control circuit, 12...valve, 1
3...Control device.

Claims (1)

[Scope of Claims] 1. A nozzle for supplying oil to the contact surface of the wet clutch, an oil pan that collects oil dripping from the contact surface of the clutch, and sucking oil from the oil pan and supplying it to the nozzle. A wet clutch oil supply device including a pump, comprising an oil reservoir arranged at a higher position than the nozzle, in which oil is accumulated by the pump, and the oil supplied to the nozzle is supplied from the oil reservoir by a drop. means for detecting the amount of oil accumulated in the oil reservoir; means for driving the pump only when the amount of oil detected by the means is less than a predetermined amount; and a combination of the oil reservoir and the nozzle. An oil supply device for a wet clutch, comprising: a valve provided in a passage between the clutches; and means for controlling opening and closing of the valve according to the operation of the clutch.