| 摘要 |
PROBLEM TO BE SOLVED: To prevent fuel injection characteristic change resulting from the output characteristic of an in-accumulator chamber pressure sensor by holding the output signal value of the in-accumulator chamber pressure sensor at a point in time when pressure in an accumulator chamber becomes a predetermined value as a learning value, and correcting the output signal value of the in-accumulator chamber pressure sensor based on the learning value. SOLUTION: An internal combustion engine stop counter started using the stop of an internal combustion engine 1 as a trigger and renewing its value at each output signal of a clock is provided, when the output voltage value of an in-accumulator chamber pressure sensor 11 is corrected by a CPU in an ECU 10. When the counter value of the counter exceeds a predetermined time, the output voltage value of the pressure sensor 11 is read in, and the output voltage value of the pressure sensor 11 is written onto a RAM. Thereafter, when the internal combustion engine 1 is restarted and the output voltage value of the pressure sensor 11 is read in, the leaning value stored in the RAM is read out, and a value obtained by reducing the learning value from the output voltage value of the pressure sensor 11 is regarded as an actual output signal value so as to control a fuel injection valve 2. |
