JPH0440023Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is applied to a clutch device of a vehicle connected to a drive shaft of an internal combustion engine. The present invention relates to an oil level warning device for a forced oil supply system for cooling a wet clutch plate of an automatic clutch device that performs creep mode control through program control.

Here, creep mode is a driving control in which when a mechanical clutch device is used to perform a driving operation such as parking the car in a garage or correcting the parking position without applying the accelerator, the clutch slips and engages to move forward or backward at a very slow speed. Refers to mode.

[Conventional technology]

In an automatic clutch device in which program control is performed by a central control unit including a microprocessor,
In order to perform creep mode control, a system has been developed in which oil is forced into a wet disk clutch. With this system, heat generated by friction of the clutch plate is cooled by the forced oil, making it possible to operate in creep mode for a relatively long period of time.

[Problem that the invention attempts to solve]

However, in the above case, if the amount of oil and the oil pressure that are forcibly supplied are below the required values, the cooling effect of the clutch plate will be insufficient, causing problems in clutch action and possibly causing clutch failure.

That is, in general, with a manually operated clutch, if the clutch seizes, the clutch will slip, so the driver can know this in advance and can take measures such as stopping the operation at an early stage. In contrast, with program-controlled automatic clutch devices, the driver does not know that the clutch will seize due to insufficient oil or hydraulic pressure until the clutch actually seizes. There are many things that can happen.

The present invention is an oil level warning system for a wet clutch in an automatic clutch system that immediately issues an alarm and notifies the driver in the event of an abnormality in the oil level or oil pressure status described above to prevent clutch failure. The purpose is to provide

[Means for solving problems]

The present invention includes a control circuit including a microprocessor that controls the creep mode of a vehicle clutch according to a preset program, an oil supply means for supplying oil to the clutch plate, and an oil reservoir for collecting this oil. A wet clutch of an automatic clutch device comprising: means for detecting the amount of oil in the oil reservoir or the oil pressure of the oil supply means; and an alarm output means for transmitting an alarm signal in accordance with the output of the detecting means. It is characterized by:

[Effect]

The oil that is forcibly supplied to the clutch plate is once collected in an oil reservoir below the clutch plate, and is then sprayed directly onto the clutch by an oil pump.

Therefore, by detecting the amount of oil in this oil reservoir or the oil pressure of the oil pump, it is possible to warn in advance that a problem will occur in the clutch plate.

〔Example〕

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

FIG. 1 is a block diagram for explaining the above embodiment.

An automobile engine 1, a wet type clutch part 2, and a transmission part 3 are assembled into one body, and oil is collected in an oil reservoir 21 at the bottom of the clutch part 2.

When the engine 1 rotates, the oil in the oil reservoir 21 is sucked up by the oil pump 23 through the passage 22, pressurized, and sprayed onto the clutch plate (not shown) through the passage 24 by the blowout part 27 in the clutch part 2. It will be done.

The central control unit 4 includes a microprocessor and performs automatic clutch control in conjunction with various vehicle operating devices (not shown), such as an access pedal and a gear shift lever. Electrical circuits are omitted.

Here, the feature of the present invention is that in a wet clutch in an automatic clutch device in which the clutch disengagement operation is program-controlled by a microprocessor in such a creep mode, the operation program control is The wet clutch to be engaged is provided with an oil amount sensor 7 for detecting the amount of residual oil in the oil reservoir 21 and an oil pressure sensor 8 for detecting the oil pressure between the blowout portion 27 from the oil pump 23 as an oil amount alarm device. The detection signal is sent from the oil amount comparison circuit 5a and the oil pressure comparison circuit 5b of the comparison unit 5, and is compared with the respective limit values stored in the central control unit 4. If it is determined that the detection signal is insufficient, the alarm unit 6 is activated. An alarm is issued from the oil amount marker section 6a and the oil pressure marker section 6b.

FIG. 2 is a diagram showing an embodiment of the above-mentioned embodiment, in which the residual oil in the oil reservoir 21 of the clutch portion 2 is temporarily discharged to the outside of the clutch portion 2 through a passage 22, and is further pumped by an oil pump 23 inside the clutch portion. The input shaft 2 is pressurized and passes through the passage 24 and the passage 26.
The air passes through the outer mantle of the air conditioner 8, is ejected from the air blowing portion 27, and is blown onto the clutch plate 29.

The oil amount sensor 7 is provided outside the oil reservoir 21,
The oil pressure sensor 8 is provided in a passage 26 from the oil pump 23.

[Effect of idea]

According to the present invention, when the wet clutch of an automatic clutch device that performs program control is operated in creep mode for a long time, a warning is issued before a problem occurs in the clutch section, so that the device can be shut down due to insufficient oil. The vehicle can be driven safely without any damage.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating an embodiment of the present invention. FIG. 2 is a diagram showing an embodiment of the above embodiment. DESCRIPTION OF SYMBOLS 1... Engine, 2... Clutch part, 3... Transmission part, 4... Central control unit (CPU), 5... Comparison part, 5a... Oil amount comparison circuit, 5b... Oil pressure comparison circuit, 6... ...Alarm section, 6a...Oil level marker section, 6b
...Hydraulic pressure marker section, 7...Oil amount sensor, 8...Hydraulic pressure sensor, 21...Oil reservoir, 22, 24, 26...
... Passage, 23 ... Oil pump, 27 ... Blowout section, 28 ... Input shaft, 29 ... Clutch plate.

Claims (1)

[Scope of Claim for Utility Model Registration] A control circuit including a microprocessor that controls the creep mode of a vehicle clutch according to a preset program; an oil supply means for supplying oil to a clutch plate; In a wet clutch of an automatic clutch device, the wet clutch is equipped with an oil sump for collecting oil, a means for detecting the amount of oil in the oil sump or the oil pressure of the oil supply means, and an alarm according to the output of the detecting means. 1. An oil level warning device for a wet clutch, comprising: warning output means for sending a signal.