Flushing control method and system for solenoid valves of wet type dual clutch transmission clutch

A wet dual-clutch, solenoid valve technology, applied in clutches, transmission control, components with teeth, etc., can solve the problems affecting the control quality of the solenoid valve, affecting the driving safety, and the solenoid valve sticking, etc., to prevent long-term work. Wear, ensure driving safety, avoid slippage and wear

Active Publication Date: 2018-02-16
SHANGHAI AUTOMOBILE GEAR WORKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the long-term use of the dual-clutch automatic transmission, the wear and tear of the moving components of the transmission will cause oil pollution, which will affect the control quality of the solenoid valve and even cause the solenoid valve to stick, seriously affecting driving safety

Method used

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  • Flushing control method and system for solenoid valves of wet type dual clutch transmission clutch
  • Flushing control method and system for solenoid valves of wet type dual clutch transmission clutch
  • Flushing control method and system for solenoid valves of wet type dual clutch transmission clutch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] By detecting the driving state of the vehicle and judging the state in real time: when the vehicle is running normally, pulse flushing is performed on the solenoid valve of the non-working clutch, such as figure 1 shown. When the vehicle speed is greater than 40km / h, the actual gear position is 5th gear or 6th gear, and the throttle change rate is less than 20% (step 2), then enter the automatic flushing function (step 3). Determine the number of flushing cycles in a flushing process (step 4), and exit flushing if it exceeds 3 cycles.

[0052] The judgment of the above-mentioned flushing process is as follows: figure 2 shown. Detect the actual gear and the target gear (step 6), when there is no change (step 7), it is judged to be the same flushing process, and the cycle counter is incremented by 1 after a flushing cycle is completed (step 9), otherwise Then the counter is cleared to 0 (step 10).

[0053] In the above flushing cycle, the selection of the target sole...

Embodiment 2

[0057] By detecting the driving state of the vehicle and making a real-time state judgment: when the solenoid valve is stuck and reports a pressure difference fault, the vehicle limps or is in a parking state, the faulty clutch solenoid valve is pulsed to be flushed, such as Figure 8 shown. When there is a differential pressure failure in the odd clutches and the transmission utilizes the even gears to limp (the 43rd step), then the odd clutch electromagnetic valve is automatically flushed (the 47th step). When there is a differential pressure failure in the even clutches and the transmission utilizes the odd gears to limp (the 44th step), then the odd clutch electromagnetic valve is automatically flushed (the 45th step). In order to protect the solenoid valve, the flushing cycle is set to 10 (step 50), and when the upper limit is reached, the flushing is completed (step 51).

[0058] In the above flushing cycle, the automatic flushing process of odd-numbered clutch solenoid...

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Abstract

The invention discloses a flushing control method and system for solenoid valves of a wet type dual clutch transmission clutch. The transport condition of a vehicle is detected, and state judgment iscarried out in real time; when the vehicle is normally driven, impulse type flushing is carried out on the solenoid valve of a clutch which does not work; and when the solenoid valve is blocked and apressure difference failure, vehicle limping or a parking state are given out, impulse type flushing is carried out on the broken clutch solenoid valve, when impulse type flushing cannot eliminate theblocking failure, impulse type flushing is carried out on the solenoid valves of the two clutches at the same time in a parked state, and therefore automatic recovery of the solenoid valve state is achieved. By means of the flushing control method and system, the cleanliness of the solenoid valves can be guaranteed, a transmission failure is prevented, and the probability of the transmission failure is reduced; and the service life of the transmission is prolonged, and the maintaining cost and the using cost are saved.

Description

technical field [0001] The invention relates to a technology in the field of dual-clutch control, in particular to a flushing control system and method for a clutch electromagnetic valve of a wet dual-clutch transmission. Background technique [0002] During the long-term use of the dual-clutch automatic transmission, the wear and tear of the moving components of the transmission will cause oil pollution, which will affect the control quality of the solenoid valve and even cause the solenoid valve to stick, seriously affecting driving safety. Therefore, it is particularly important to prevent the solenoid valve from sticking by flushing the solenoid valve. At the same time, in order to efficiently solve the stuck fault of the solenoid valve caused by oil pollution, the necessary automatic and manual processing functions are also essential. Contents of the invention [0003] Aiming at the defects of the prior art that the automation program is relatively low and different ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/00F16H61/12F16D48/02
CPCF16D48/02F16D2048/0221F16H61/00F16H61/12F16H2061/0043F16H2061/126
Inventor 万朕东高晶徐彬杰王龙
Owner SHANGHAI AUTOMOBILE GEAR WORKS
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