| 摘要 |
#CMT# #/CMT# The device has an analogue comparator (11) for comparing a terminal voltage of an electrical control switch (8) with a reference voltage (Vref) equal to a preset voltage value when the switch is open and for delivering comparison information (I) which translates if the terminal voltage is equal or different from the preset voltage value. A control and diagnostic unit (12) receives the information on an inlet and delivers an alert signal (d1) if the information translates the terminal voltage different from the preset voltage value. #CMT#USE : #/CMT# Device for diagnosing an electronic firing circuit for an electronic firing system of an engine of a vehicle (claimed). #CMT#ADVANTAGE : #/CMT# The device allows the diagnosis of a control state being based on the observation of a primary ignition circuit and potential difference at terminals of a zener diode. The device indicates, to a calculator, that the diode does not consider the voltage of the instruction, and provides a breakdown of the state. The device provides the change of a spark plug to subjugate the control of an ignition coil for maintaining the minimum duration of the spark, thus ensuring a satisfying combustion level, and hence avoiding the combustion failure, and avoiding the misfire. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a functional diagram of an electronic firing circuit of a vehicle. d1 : Alert signal I : Comparison information Vref : Voltage reference Z : Zener diode 2 : Spark plug 6 : Calculator 8 : Electrical control switch 10 : Microcontroller 11 : Analogue comparator 12 : Control and diagnostic unit. |
