Network optimization information:

Solenoid valve failure will directly affect the action of the switching valve and regulating valve, common solenoid valve failure should be investigated from the following four aspects:

Pilot solenoid valve leakage: leakage will lead to insufficient air pressure, so that the forced valve is difficult to open and close. This is due to damage to the gasket or wear of the slide valve, resulting in several cavity leaks. When the solenoid valve fault occurs in the switching system, it should be dealt with after the appropriate time of the solenoid valve power off. If you cannot handle it within a switching interval, you can suspend the switching system and deal with it calmly.

Carbon tank vacuum solenoid valve stuck: solenoid valve spool sleeve and spool fit gap is very small (less than 0.008mm), generally is a single assembly, mechanical impurities or lubricating oil is too little easy to stuck. The processing method can be used to Pierce the hole in the head with iron wire and make it rebound. The basic solution is to remove the solenoid valve, take out the spool and the spool sleeve, clean with CCI4, so that the spool in the spool sleeve flexible movement. When disassembling and assembling, pay attention to the assembly sequence and external wiring position of each component to facilitate reassembly and correct wiring. At the same time, check whether the oil spray hole is blocked and whether the lubricating oil is sufficient.