| 摘要 |
PROBLEM TO BE SOLVED: To prevent the erroneous detection of the valve-opening and valve-closing of an electromagnetic valve.SOLUTION: When a signal line INJ_ON for driving an injector 3 is brought into an on-state at a time ton, a count of a counting part 301 is started. A signal line EN from SR_FF305 becomes 1 at a time t51. A valve-opening/valve-closing detection part 203 detects a discontinuous point of a signal line I_INJ during the signal line EN remains at 1. The valve-opening/valve-closing detection part 203 detects the discontinuous point of the signal line I_INJ at a time t1, and outputs 1 to a signal line DETECT when detecting the discontinuous point. At the same time, a count value holding register 306 holds a count value at the time t1. The signal line EN of the SF_FF305 becomes 0 at a time t52, and signal processing for detecting the discontinuous point of the signal line I_INJ is finished. A control part 202 calculates a time from a drive start of the injector up to the finish of the valve-opening, and adjusts a pulse width of injector drive. |
