Diagnosis method of brake lamp switch of electric passenger vehicle
A diagnostic method and brake light technology, applied in the direction of brake safety systems, vehicle components, circuits or fluid pipelines, etc., can solve problems such as false alarms, and achieve the effect of accurate diagnosis results and less false alarms
Active Publication Date: 2020-11-20
ZHEJIANG LEAPMOTOR TECH CO LTD
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- Application Information
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Problems solved by technology
[0003] The present invention mainly solves the problem that the existing brake light switch diagnosis method only uses the disconnection of two circuits as the diagnosis basis, and there is a problem of false alarms, and provides a method that comprehensively considers pipeline pressure, vehicle settings, vehicle speed, steering angle and braking stroke, Diagnosis method for brake light switch of electric passenger car with accurate diagnosis result
Method used
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Embodiment
[0038] This embodiment is a method for diagnosing the brake light switch of an electric passenger car, such as figure 2 Shown, including:
[0039] Collect vehicle driving parameter information. The vehicle driving parameter information includes the driving speed at the moment the brake pedal is depressed each time the brakes are applied, the corresponding relationship between the brake pedal stroke and the real-time vehicle speed each time the brakes are applied, the turn-on status and turn-on lights each time the brake is turned on Corresponding relationship between the steering wheel deflection angle and the stroke of the brake pedal;
[0040] Obtain the conduction status of the brake light circuit and the cruise circuit;
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The invention relates to a diagnosis method of a brake lamp switch of an electric passenger vehicle. The diagnosis method comprises the steps of collecting vehicle driving parameter information; acquiring conduction states of a brake lamp loop and a cruise loop; detecting pressure of a brake pipeline and comparing the pressure with a preset pipeline pressure threshold value; when the pressure of the brake pipeline is larger than the pipeline pressure threshold value and the vehicle does not start automatic parking, if the brake lamp loop and the cruise loop are both disconnected, judging thatthe brake lamp switch breaks down; otherwise, adopting a first fault diagnosis method to diagnose the fault of the brake lamp switch. The method has the advantages that the brake lamp switch fault diagnosis is performed by comprehensively considering the pipeline pressure, vehicle setting, a vehicle speed, a steering angle and a brake stroke, a diagnosis result is accurate, and false alarm is noteasy to occur.
Description
Technical field [0001] The invention relates to the field of vehicle fault detection, in particular to a method for diagnosing brake light switches of electric passenger vehicles. Background technique [0002] At present, there are many types of brake light switches in the market, and the internal structure is also diversified. The common point is that the current brake light switches have two circuits. Such as figure 1 As shown, terminals 1 and 2 are brake light circuits, and terminals 3 and 4 are cruise circuits. The cruise circuit is connected when the brake pedal is not depressed, and the brake light circuit is connected when the pedal is depressed. There is an intermediate transition state between the light circuit and the cruise circuit switching process. The difference is that some brake light switches will be turned on at the same time during this conversion process, and some of them will be turned off. The current mainstream switch diagnosis solution is When both circui...
Claims
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Login to View More IPC IPC(8): B60R16/023B60T17/22
CPCB60R16/0232B60T17/22
Inventor 聂志福尹浩徐益李维超
Owner ZHEJIANG LEAPMOTOR TECH CO LTD