Engine oil pressure transducer for four-stroke motorcycle

The utility model relates to an oil pressure sensor for crank cases. The utility model is characterized in that a push rod, the end part of which is fixed with a contact sheet, is arranged at an oil inlet of an upper oil circuit of a crank case; the contact sheet can be contacted with a steel jacket, communicated with a wiring terminal, to form electric contact. When lubricating oil is pumped out from the oil inlet by an oil pump in the crank case, the push rod is pushed up because of high oil pressure, the contact sheet fixed at the end part of the push rod is disengaged with the steel jacket, and the electric connection is switched off. When a motorcycle is lack of lubricating oil, namely, the oil pump can not pump out oil or the oil pressure of pumped oil is not enough to push up the push rod, the electric connection can not be switched off, a cue circuit works to send out signals to indicating oil starvation.