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Control method for electromagnetic valve of automatic transmission

A technology of automatic transmission and control method, applied in the direction of transmission control, valve operation/release device, valve details, etc., can solve the problems of slow response of solenoid valve of automatic transmission, etc., and achieve improved shifting feeling, fast and good working response Effects of Response Properties

Inactive Publication Date: 2016-01-20
HARBIN DONGAN AUTOMOTIVE ENGINE MFG CO LTD
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of slow response of the existing automatic transmission solenoid valve, the present invention further provides a control method of the automatic transmission solenoid valve with faster oil pressure build-up and smoother shifting feeling

Method used

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  • Control method for electromagnetic valve of automatic transmission
  • Control method for electromagnetic valve of automatic transmission

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specific Embodiment approach

[0014] The specific embodiment provided by the invention is as follows:

[0015] Detailed ways: like figure 1 As shown, a control method of an automatic transmission solenoid valve:

[0016] Step 1. According to the current and plunger position characteristics of the solenoid valve, find the current I that maintains the solenoid valve at the critical point of the dead zone.

[0017] When the current of the solenoid valve is maintained at the critical point, the solenoid valve is in a critical state between moving and not moving. According to the characteristics of the current of the solenoid valve and the position of the plunger, find the critical point of the dead zone of the solenoid valve, and place the solenoid valve at the critical point. The operating current of the solenoid valve at the critical point of the dead zone is determined as I.

[0018] Step 2. When the solenoid valve is not working, give the solenoid valve a 1 current, the current I 1 Current I greater ...

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Abstract

The invention provides a control method for an electromagnetic valve of an automatic transmission and relates to the technical field of control over the automatic transmission. The control method aims at solving the problem that an existing electromagnetic valve of an automatic transmission is low in response speed. The control method for the electromagnetic valve of the automatic transmission includes the steps that firstly, a current I keeping the electromagnetic valve in a dead zone critical point is found according to the current and plunger position characteristics of the electromagnetic valve; secondly, when the electromagnetic valve does not work, a current I1 is kept for the electromagnetic valve, the current I1 is larger than the current I and smaller than a clutch kisspoint current, the electromagnetic valve has a tiny opening degree, and it is guaranteed that tiny oil pressure exists between the electromagnetic valve and a corresponding clutch; and thirdly, when the electromagnetic valve prepares to start to work, a working current I2 is continuously supplied to the electromagnetic valve, the current I2 is quickly increased on the basis of the current I1, and it is guaranteed that the oil pressure of the clutch corresponding to the electromagnetic valve is gradually increased. The control method has the beneficial effects that the working response speed of the electromagnetic valve is high, and the oil pressure of the clutch is more stably established, gear shifting control over the automatic transmission is facilitated, and the gear shifting feeling of a vehicle is improved.

Description

technical field [0001] The invention relates to a control method, in particular to a control method for a solenoid valve of an automatic transmission, and belongs to the technical field of automatic transmission control. Background technique [0002] A typical automatic transmission includes a torque converter and a power train with multiple speed gearing coupled to the torque converter. In addition, a hydraulic control system is installed on the automatic transmission for selectively operating at least one operable element included in the power train according to the operating state of the vehicle. In a hydraulic control system, the main component responsible for the work is the solenoid valve. [0003] The current of the solenoid valve and the position characteristics of the plunger of the solenoid valve are used to control the opening of the solenoid valve to achieve the purpose of further controlling the clutch pressure. [0004] Due to the influence of friction, wande...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/28F16K31/06
CPCF16H61/2807F16H2306/00F16K31/06
Inventor 王延昭严丽丽李延斌徐景欣丁帮伟丁麟王惠郑佳雷郭凤男吴鹏李晓龙
Owner HARBIN DONGAN AUTOMOTIVE ENGINE MFG CO LTD
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