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A method to prevent the clutch solenoid valve from being stuck in a fixed gear

A technology for shifting clutches and solenoid valves, which is applied in the directions of clutches, components with teeth, transmission control, etc., and can solve problems such as solenoid valve sticking.

Active Publication Date: 2021-03-16
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the electromagnetic valve sticking caused by the deposition of impurities around the valve core due to the fact that the shift solenoid valve of the upper automatic transmission is in a static state during non-working hours, and prepare for the working state at the same time, improve the operating speed and rate stability of the valve core in the working state , so as to improve the responsiveness and stability of the shifting oil pressure. The present invention proposes a method for preventing the transmission from sticking in the fixed gear clutch solenoid valve. The specific technology of the present invention The scheme is as follows:

Method used

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  • A method to prevent the clutch solenoid valve from being stuck in a fixed gear
  • A method to prevent the clutch solenoid valve from being stuck in a fixed gear

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Embodiment 1

[0030] The invention is applicable to all automatic transmissions that realize gear shifting by controlling a hydraulic or pneumatic system with a solenoid valve, without pre-judging whether the battery valve is stuck or not. It can be flushed when the vehicle is running normally to prevent the stagnation, instead of flushing after the stagnation occurs; there is no need to detect the current movement mode of the vehicle, and it is compatible with all modes.

[0031] The following will only take a certain four-degree-of-freedom 9AT transmission as an example to describe in detail a method of preventing the transmission from sticking in a fixed gear clutch electromagnetic valve of the present invention, such as figure 1 shown, including the following steps:

[0032] S1: During the normal driving of the car, by reading the information in the automatic transmission TCU, including the current gear, the shift timing of all shift solenoid valves in the current gear, and the shift cl...

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Abstract

The invention discloses a method for preventing a clutch electromagnetic valve of a transmission from being stuck in a fixed gear position. The main method is to design a periodic "washing" action for the electromagnetic valve in the fixed gear position. By controlling the electromagnetic valve, the clutch oil pressure is kept at The range from the safe oil pressure to the maximum oil pressure in this gear is periodically increased and decreased, so that the transmission oil can generate more flow, prevent the accumulation of impurities, and achieve the purpose of preventing the solenoid valve from sticking.

Description

technical field [0001] The invention belongs to the technical field of automatic transmissions, and in particular relates to a method for preventing a transmission from sticking in a fixed gear clutch electromagnetic valve. Background technique [0002] The popularity of automatic transmissions in passenger cars provides drivers with good vehicle power, comfort and economy. The clutch and shift solenoid valve in the automatic transmission are the actuators that control the transmission gear and the shifting process. The gear formation of the transmission under normal driving conditions requires the cooperation of multiple sets of clutches and shift solenoid valves. For automatic transmissions that are shifted by hydraulic or pneumatic systems controlled by solenoid valves, as the use of automatic transmission fluids accumulates over time, more and more impurities will be mixed in the oil during the entire life cycle. If the automatic transmission is used for a long time In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16D48/10
CPCF16D48/066F16D48/10F16D2500/1022F16D2500/1045F16D2500/50239F16D2500/50296F16H61/0204F16H61/0251F16H2061/026
Inventor 王书翰陈一铉徐向阳董鹏郭伟刘艳芳郑威支景锋王涛
Owner BEIHANG UNIV