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Method for diagnosing switching signal of clutch

A technology of clutch switch and diagnosis method, which is applied in the field of diagnosis of clutch switch signal, can solve problems such as engine speed drift, engine flameout, safety and drivability impact, and achieve the effect of avoiding engine flameout

Active Publication Date: 2011-04-13
奇瑞控股集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if the clutch switch signal is faulty on a gasoline vehicle equipped with an electronic throttle system, it is easy to cause the engine speed to rise when the clutch is depressed.
Under some EFI systems, the engine will stall when shifting gears, which will have varying degrees of impact on the safety and drivability of the vehicle

Method used

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  • Method for diagnosing switching signal of clutch
  • Method for diagnosing switching signal of clutch
  • Method for diagnosing switching signal of clutch

Examples

Experimental program
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Embodiment Construction

[0012] A method for diagnosing a clutch switch signal, the steps of which are as follows:

[0013] Step 1: The engine control unit recognizes the change of gear position information;

[0014] Step 2: When the gear position information changes, the engine control unit judges whether the clutch switch signal changes, if yes, do not perform any operation, if not, perform step 3;

[0015] Step 3: The engine failure unit starts a failure alarm.

[0016] The gear position information is the determined specific gear value, generally 1-5 gears or 1-6 gears, and the reverse gear is judged as 1 gear. Using the data obtained by the vehicle speed sensor and the engine speed sensor, a vehicle speed and speed ratio can be calculated, which is what we commonly call the speed ratio. The calculated speed ratio can be compared with the speed ratio tolerance zone of each gear that has been set by the engine control unit, which gear falls within the tolerance zone, and the specific gear at that...

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PUM

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Abstract

The invention relates to a method for diagnosing a switching signal of a clutch. By the method, the reliability of the switching signal of the clutch can be effectively diagnosed. The technical scheme of the method is that: the method for diagnosing the switching signal of the clutch comprises the following steps that: 1, an engine control unit identifies the change of gear information; 2, when the gear information changes, the engine control unit judges whether the switching signal of the clutch changes; if so, the engine control unit does not execute any operation; otherwise, the engine control unit executes a step 3; and 3, an engine fault unit starts fault alarm. The reliability of the switching signal of the clutch relates to the safety and drivability of an overall vehicle; at present, methods for diagnosing a single switching signal are a few; and by the method, the reliability of the switching signal of the clutch can be diagnosed through overall vehicle gear information and the phenomena of revolution speed increase of an engine, and engine flameout during gear shifting can be effectively avoided.

Description

technical field [0001] The invention relates to a method for diagnosing clutch switch signals. An engine control unit diagnoses clutch signal faults and can be applied to the control field of related systems such as gasoline vehicles and diesel vehicles. Background technique [0002] The clutch is a mechanical part of the vehicle, and whether it can correctly transmit its status signal to the engine control unit is crucial for the use of related functions of the vehicle. [0003] The impact of the clutch signal on the function of the vehicle is currently mainly manifested in the following aspects: monitoring of cruise, high pressure test function monitoring, compression test function monitoring, acceleration test function monitoring, clutch status monitoring and other failures. In addition, if the clutch switch signal is faulty on a gasoline vehicle equipped with an electronic throttle system, it is easy to cause the engine speed to fluctuate when the clutch is stepped on. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W50/02
Inventor 张传朋
Owner 奇瑞控股集团有限公司
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