| 摘要 |
1345216 Fuel injection systems BENDIX CORP 11 Oct 1971 [15 Oct 1970] 47218/71 Heading G1N In an I.C. engine intermittent fuel injection system having at least two fuel injection groups, electrical pulses are applied to the injectors of each group in such a manner that the open times of the injectors of one group can overlap with those of the injectors of another group. As shown, engine rotation initiated pulses TR1, TR2 are applied to a pulse generator 10, TR1 being applied to AND gate 51 and TR2 to AND gate 52. A signal generator 10<SP>7</SP> provides a pulse train Á 2 , having pulse durations T1 controlled by a sensed engine parameter, e.g. absolute intake manifold pressure, which is applied to both gates 51, 52 so that gate 51 provides a pulse train Á 2 ' and gate 52 provides a pulse train Á 2 ". These pulse trains are applied to a bi-stable multi-vibrator 59 which provides output pulse trains Á 6 , Á 6 ' respectively to AND gates 53, 54 in a second pulse generator 30, to a second signal generator 30' which provides a pulse train Á 3 to both gates 53, 54, the duration T2 of these pulses being controlled by a sensed engine parameter, e.g. differential intake manifold pressure, and to OR gates 55, 56 respectively. The output pulses Á 3 ', Á 3 " of AND gates 53, 54 are respectively applied to the OR gates 55, 56 whereby gate 55 provides an output pulse train Á 5 of pulse duration T1 + T2 to one injection group 80, and gate 56 provides output pulse train Á 7 of pulse duration T1 + T2 to the other injection group 90. The pulses of train Á 5 are initiated with the pulses TR1 and the pulses of train Á 7 are initiated with the pulses TR2, the durations T1 + T2, however, being capable of being larger than the durations of TR1 and TR1 to provide the desired overlap. |
