Intelligent drain valve control feedback circuit of vehicle gas path and drain valve fault diagnosis method

Abstract

The invention relates to an intelligent drain valve control feedback circuit of a vehicle gas path and a drain valve fault diagnosis method. A central processing chip is connected with a drain valve main control power supply and a controlled end of an intelligent driving module respectively through an output port, the output end of the intelligent driving module is connected with the positive control end of a drain valve and the cathode of a diode, the anode of the diode is grounded and idiostatic with the negative end of an external drain valve of a circuit, a VDD, a D1, an R1, an R2 and a GND form a low-voltage low-current loop, the crossing point of the R2 and the R1 is connected with the positive control end of the drain valve so as to conduct state sampling, another electric wire is leaded out of the crossing point of the R2 and the R1 to a sampling processing module through a current-limiting resistor R3 for tracking, the sampling processing module is connected to an ADC pin of the central processing chip, and the crossing point of the current-limiting resistor R3 and the sampling processing module is connected with a voltage-limiting voltage-stabilizing tube Z1 to the GND.

Description

technical field [0001] The invention relates to a control feedback circuit of an intelligent drain valve of a vehicle gas path and a fault diagnosis method for the drain valve. Background technique [0002] The insufficiently dried moisture and condensed water in the compressed air of the vehicle will deposit in the air storage tank, causing the volume of the air storage tank to decrease, and even cause corrosion to the gas-using equipment. Most of the existing vehicles are regularly drained through the manual drain valve installed at the bottom of the air storage tank. In actual maintenance work, a large number of vehicle drainage maintenance work cannot be guaranteed. [0003] In the past two years, some automatic drainage devices have gradually appeared to replace manual drainage valves. The solenoid valve in the automatic drainage device is the main drainage execution component. If this component does not work normally and cannot provide an alarm, it will cause more and ...

AI Technical Summary

Problems solved by technology

[0003] In the past two years, some automatic drainage devices have gradually appeared to replace manual drainage valves. The solenoid valve in the automatic drainage device is the main drainage execution component. If this component does not work normally and cannot provide an alarm, it will cause more and more water in the air storage tank. Bring hidden dangers to the operation of vehicles and affect the performance of the entire drainage system

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