| 摘要 |
PURPOSE:To provide capability to check any car trouble which appears intermeittently by equipping an equivalent electronic device to car electronics as regards the output power at the normal time and a judgement circuit which is to judge coincidence of the outputs of the car electronics and the equivalent electronic device. CONSTITUTION:An electronically controlled computor for injection of fuel 1, is fed with signals from a throttle sensor 2, suction air flow sensor 3 and water temp. sensor 4 and sends the output pulses B to the fuel injection valve 5. A trouble checking device 8 is composed of an equivalent computer 9 having the same function as the computer 1, a judgement circuit 10 to judge coincidence of the outputs of computer 1 and equivalent computer 9, and an indicator lamp 11 to indicate incoincedence in these two outputs. The judgement circuit 10 has an exclusive logical sum circuit 12, that gives capability to check even a trouble which yields an erroneous output out intermittently. |
