| 摘要 |
1312268 Engine fuel and ignition control systems NIPPONDENSO K K 4 Nov 1970 [13 Nov 1969] 52510/70 Heading G1N In an I. C. engine fuel injection and ignition control system, signals representing intake manifold pressure, engine temperature, and engine revolution are combined in a device 3 to provide a voltage representing the desired amount of fuel to be injected, this voltage being applied, together with a fuel injection starting signal, to a fuel injection signal generator 5 to provide a train of pulses each having a width representing the desired amount of fuel, the fuel injection signals being distributed at 7 in response to a signal derived in synchronism with engine rotation before injection occurs in a specific cylinder, and the signals representing intake pressure and engine revolution are also combined in device 3 to provide a voltage representing a desired ignition angular setting, this signal being applied, together with a saw-tooth wave generated at 4 in synchronism with a detected specific crankshaft position, to an ignition signal generator 6, to provide a train of ignition pulses which are distributed at 10 under control of the specific cylinders signal. The injection starting signal generator is, in the embodiment shown, the saw-tooth generator 4. In addition, the voltage representing the desired amount of fuel to be injected, is affected by the outputs of a throttle speed sensor, a throttle position sensor and a starting sensor, each enriching the fuel supply in response to acceleration, fully open throttle and starting, respectively. A fuel injection interrupting signal generator is also provided to cut of fuel when the temperature of the engine is normal but the intake pressure is extremely low, i.e. throttle closed and engine acting as a brake. |
