| 摘要 |
PURPOSE:To improve the reliability with detection of faults by detecting both the check bit value and the learning value of a backup memory with a fault detector of a learning control system and initializing the contents of the memory if both said values are out of set values. CONSTITUTION:The engine load information and the information on the rotational frequency of the engine, the driving speed of a car, etc. are supplied to a CPU1. At the same time, the programs and data are supplied to the CPU1 from a RAM2. While a stand-by RAM3 supplies the past learning value to the CPU1. A part 8 to be controlled controls a fuel injection valve, an igniter, etc. The voltage is always applied to the RAM3 from a secondary power supply together with a check bit set. Then the RAM3 is initialized if it keeps no prescribed value and also when the detected value exceeds the learning value to prepare for detection of faults. |
