Method and system for diagnosing fault of clutch control failure

Abstract

The invention provides a method and system for diagnosing a fault of a clutch control failure. The method comprises the steps that whether a fault category is a disengagement fault or an engagement fault is judged according to a sent clutch control instruction and clutch actual position information fed back by a position sensor; a clutch control instruction of the same first electromagnetic valve driving type in the failure category is sent out according to the fault category, closed-loop control is carried out, an operator continues to judge whether a clutch successfully acts or not, and if the clutch successfully acts, an intermittent fault happens; if the clutch does not successfully act, the operator continues to send out the clutch control instruction of the first electromagnetic valve drive type, open-loop control is carried out, and the operator continues to judge whether the clutch successfully acts; if the clutch successfully acts, problems exist in a control model of a clutch; if the clutch does not successfully act, the electromagnetic valve drive type is changed, the operator continues to send out a clutch control instruction of a second electromagnetic valve drive type, and if the clutch successfully acts, a first electromagnetic valve in the first electromagnetic valve drive type fails. According to the method and system, the specific type of the fault of the clutch can be accurately judged in detail.

Description

technical field [0001] The invention relates to the technical field of clutch control, in particular to a fault diagnosis method and system for clutch control failure. Background technique [0002] First introduce a few technical terms in this field: [0003] Automatic gearbox: (also known as ATM gearbox) is developed on the basis of mechanical gearbox (manual gearbox), and the automation of shifting action is realized by adding an automatic shift actuator with a controller. [0004] Clutch booster: instead of the action of the driver stepping on the pedal, it provides driving force for the separation and combination of the clutch under the action of the controller. [0005] Solenoid valve: a valve that relies on the electromagnetic force generated by the power supply coil to drive the movable iron core to open and close the disc, and is used to adjust the direction, flow, speed and other parameters of the medium. [0006] Position sensor: In the clutch booster cylinder, t...

AI Technical Summary

Problems solved by technology

Moreover, the judged clutch failure is only a large category of solenoid valve or clutch booster cylinder failure, and it cannot be judged whether the two solenoid valves are faulty or only one of the solenoid valves is faulty when the clutch is separated or combined. Therefore, the existing The judgment method provided by the technology is too general to accurately judge whether one or two solenoid valves are faulty, and it is also impossible to judge which solenoid valve is faulty when one solenoid valve is faulty.

Images