| 摘要 |
PURPOSE:To normally execute various controls, by generating the other signal at an equal interval even if one signal is broken, in an electronic control device for controlling by use of 2 reference signals. CONSTITUTION:A 4-cylinder and 4-cycle engine is constituted so that a reference angle signal SS being the first pulse signal is generated at dead point of each cylinder, that is to say, at every 180 deg. crank angle, and a unit angle signal US being the second pulse signal is generated at every 1 deg. crank angle. In this state, when the engine is operated, if the signal SS is not generated due to a fault of the first pulse device, the third pulse signal CS2 generated by a comparator 13 when a counting value of a counter 11 has coincided with contents of a register 14 resets counters 1, 11, and also an interruption is generated in a microcomputer 4. Subsequently, a signal CS2 is generated at an equal interval to that of the signal SS, the signal CS2 is supplied to an apparatus to which the signal SS is supplied, and control synchronizing with an angle of rotation of the crank shaft is performed. |
