High pressure natural gas shutoff valve drive circuit diagram

Posted on Mar 28, 2007

As shown for the driver circuit high pressure natural gas shut-off valve, the device 01 for the solid state relays. When the engine is in dual-fuel mode of operation, the opera

High pressure natural gas shutoff valve drive circuit diagram
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tion of the fuel switching mechanism, the logic judging section instructs so Y4 1, is high by U2 (7404, inverters), the electric point B UB low, surface potential UA point a to point B than high, then the input of the solid state relay is turned on, the output terminal is also turned on. The output of CD Once connected, the solenoid valve HPVALVE ends will add 12V rated working voltage, high-pressure natural gas before the pressure reducer valve open, gas enters the engine under reduced pressure. When the instruction issue logic portion of the electromagnetic valve is closed, Y4 0, after the inverter, B is high, UA UB, no input current through the solid state relay, the output terminal is not turned on, the solenoid valve recovery normally closed by the spring force.

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