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Fault diagnosis response circuit for vehicle solenoid valve and its application method

A fault diagnosis, solenoid valve technology, applied in general control systems, electrical testing/monitoring, instruments, etc., can solve problems such as difficulty in ensuring accuracy, prone to misjudgment, weak response, and achieve fault diagnosis and failure. Responding to and Avoiding Dangerous Situations

Active Publication Date: 2018-01-30
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] First of all, this design mainly diagnoses whether the fault exists based on the current detected by the sensor. The entire judgment depends on the sensitivity of the sensor. Low;
[0005] Secondly, although the design can realize the fault diagnosis function, it does not provide effective countermeasures to solve the fault, so its response is weak

Method used

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  • Fault diagnosis response circuit for vehicle solenoid valve and its application method
  • Fault diagnosis response circuit for vehicle solenoid valve and its application method

Examples

Experimental program
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Effect test

Embodiment 1

[0046] see figure 1 and figure 2 , a vehicle solenoid valve fault diagnosis response circuit, including a CPU1, a solenoid valve 2 and a display device 3, the display device 3 is connected to the information output port a on the CPU1, and the CPU1 is connected to the solenoid valve 2 through a fault diagnosis unit connected; the fault diagnosis unit includes a logic operation processing circuit 4 and an integrated chip 5, and the logic operation processing circuit 4 includes a NAND gate chip 41, a NOR gate chip 42 and a comparator 43; on the CPU1 An information output port a, a main control signal output port b, a secondary control signal output port c, and a voltage input port d are provided. The main control signal output port b, the secondary control signal output port c, and the input end of the NAND chip 41 Signal connection, the output terminal of the NAND gate chip 41 is connected with the input terminal signal of the NOR gate chip 42, the output terminal of the NOR g...

Embodiment 2

[0049] Basic content is the same as embodiment 1, the difference is:

[0050] The integrated chip 5 is a BTS7236W chip. The display device 3 refers to an instrument, a display or a display screen.

Embodiment 3

[0052] Basic content is the same as embodiment 1, the difference is:

[0053] The simultaneous feedback of the detection results in the form of voltage refers to: the integrated chip 5 first internally judges the detection results, and then simultaneously feeds back the judgment results in the form of voltage.

[0054] The feedback voltage is 5V or 0V, the voltage of 5V represents the signal 1, and the voltage of 0V represents the signal 0.

[0055] The processing of the feedback voltage by the CPU1 to determine whether there is a fault in the solenoid valve 2 refers to: when the feedback voltage is 0V, the CPU1 judges that the solenoid valve 2 is faulty.

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Abstract

The invention discloses a vehicle solenoid valve fault diagnosis addressing circuit, comprising a CPU, a solenoid valve, a logic operation processing circuit, an integrated chip and a display device. The logic operation processing circuit comprises a NAND gate chip, a NOR gate chip and a comparator. In usage, the integrated chip detects the state of the solenoid valve and transmits the detection result to the CPU and the comparator in a voltage form to determine whether the fault exists; if the fault exists, the fault information is outputted to the display device and control of the solenoid valve can be promptly disconnected through a logic operation processing circuit in order to realize the fault addressing. The invention can not only perform the fault diagnosis and addressing on the solenoid valve through the hardware and the software, but is high in accuracy, strong in addressing, high in safety and strong in universality.

Description

technical field [0001] The invention relates to a vehicle fault diagnosis technology, which belongs to the field of vehicle control technology, and in particular to a vehicle solenoid valve fault diagnosis and response circuit and its use method, which is specifically suitable for realizing the fault diagnosis and response of a vehicle solenoid valve, and is accurate. Higher and more responsive. Background technique [0002] With the continuous development of automobile electronic control technology, the number of solenoid valves used in automobiles has gradually increased. The application of many solenoid valves, while bringing convenience to the vehicle's electronic control system, also brings certain hidden dangers. If any of the solenoid valves fails, it will affect the normal operation of the vehicle, and what's more, it will Affect the safe driving of the vehicle. For example, when the vehicle ABS solenoid valve fails, if effective fault response measures are not take...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0259G05B2219/24033
Inventor 张衡蒋立伟张东凯刘伟李艳慧王伟桑璟如李永凯李朝乐
Owner DONGFENG COMML VEHICLE CO LTD
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