| 摘要 |
PURPOSE:To constantly perform favorable combustion and contrive to improve fuel consumption, by a method wherein intake gas temperature and the atmospheric pressure or intake negative-pressure are detected, and the flow rate of a fuel is controlled on the basis of the detection results. CONSTITUTION:Outputs from an intake pressure sensor 1 and an intake gas temperature sensor 2 are current-amplified respectively by buffers 3, 4, the amplified signals are fed to comparators COM1-COM3 through an adder 5 and an inverter 6, and are compared with each of preset voltage values. In this case, for example, when the intake pressure is lower than a set point and the intake gas temperature is higher than a set point, all the outputs of the comparators COM1-COM3 become low, and a transistor Tr2 is turned ON by a low-level output inverted by an inverter 8. In addition, due to high-level outputs inverted by the inverters 7, 8 and a low-level output from the comparator COM3, a high- level output is applied to a transistor Tr1 through an NAND circuit 9 and an AND circuit 10, so that the transistor Tr1 is turned ON. Accordingly, both solenoid valves 11, 12 are opened, and an injection pump 14 is controlled in the direction for reducing the quantity of the fuel by a negative-pressure actuator 13. |
