The method of deciding coil on plug capacitive signal expansion and combustion time (cross reference of temporary application) long-cherished desire insists the preference of the American temporary patent application 60/308,580th number which is applied on 2001 July 31st, installs disclosure the whole that here with reference.

摘要

It is output by the coil on plug ignition which is covered to detect the weak electromagnetic field, the coil on plug test equipment in order to form the output signal which at the same time displays the ignition signal detects the electric field which is formed by the coil on plug device which is covered in ignition phenomenon at the same time responds to that and in order to output voltage, includes the installation possible capacitive sensor in the coil on plug device. The signal processing circuit which is connected to the capacitive sensor electrically is formed responding to the electric field which is detected, in order to form the output signal which responds to the fluctuation of the voltage which is output by the capacitive sensor. The signal processing circuit, in order to expand the output voltage of the capacitive sensor, has the amplifier which is formed.