| 摘要 |
PURPOSE:To control a valve securely and accurately with a simple device by detecting the operating condition of a fuel injection device and a suction and exhaust valve operating devices only by the variation in a current in valve control without need for using a particular sensor. CONSTITUTION:The electrifying time and the time to cut off the current, of solenoid coils 11 and 38, which are built in a fuel injection valve and a suction and exhaust valve respectively, are controlled by means of a microcomputer 54 and according to the output of a rotation phase angle sensor 10. In the device, a first and a second current detecting means 101, 102 for measuring the exciting current of each coil 11, 38 respectively, are provided. The output signals of these detecting means 101, 102 are inputted in the CPU114 of the microcomputer 54 through an A/D convertor. And, the variation in current in the coil 11 is allotted to the opening time of an injection valve, the initial variation in current in the coil 38 preceeding said variation in current in the coil 11, is allotted to the opening time of the suction valve, and the following variation in current in the coil 38 is allotted to the opening time of the exhaust valve, and these are fed back to the CPU114. |
