... special mechanical protector. As we all know, the pull in current is very big, if the instantaneous ... use mechanical protector, when the solenoid can’t pull to the end, it has 4-5mm supplementary ... adjust the solenoid, it would help the solenoid pull in the end.2, Technology and material: We ... shutdown) of diesel engine. 2,Working principle:Through pull in/reset of fuel solenoid to control the fuel ...