公开(公告)号：US3727081A

公开(公告)日：1973-04-10

申请号：US3727081D

申请日：1971-10-15

Applicant: MOTOROLA INC

Inventor： FREDERIKSEN T ,  DAVIS W ,  SHUMWAY H

IPC: F02D41/34 ,  F02D41/32 ,  G06G7/28 ,  H03K4/02 ,  H03K4/94 ,  H03K4/12

CPC classification number: F02D41/32 ,  G06G7/28

Abstract: In fuel injection ignition systems, it is necessary to provide control of the open time of the fuel injector valves which varies with the engine speed. However, for efficient operation with a minimum of pollution, the relationsip of valve open time to engine speed is not a simple relationship, and factors other than engine speed are involved. It has been found that the open time should change with engine speed by steps not directly related to engine speed. This can be accomplished by providing a waveform which varies with time across a capacitor by a regulator system which controls both increase and decrease of the voltage across the capacitor. This voltage waveform, which varies with time and is independent of engine speed, can then be combined with a ramp voltage initiated at a particular point of rotation of the engine at the time the injector valves are opened. The valves can then be turned off when the combined voltage has the desired relation to a voltage produced by manifold pressure to provide the required open time for the injector valves.

Abstract translation: 在燃油喷射点火系统中，需要提供随着发动机转速变化的燃料喷射阀的打开时间的控制。 然而，为了有效运行，污染最小，阀门打开时间与发动机转速的关系不是一个简单的关系，涉及发动机转速以外的因素。 已经发现，开放时间应随发动机速度而变化，与发动机转速无直接关系。 这可以通过提供一种由控制电容器两端的电压的增加和减小的调节器系统随电容器随时间变化的波形来实现。 随后随时间而变化并且独立于发动机转速的电压波形可以与在喷射器阀打开时在发动机的特定旋转点处开始的斜坡电压组合。 然后当组合电压与由歧管压力产生的电压具有期望的关系以为喷射器阀提供所需的打开时间时，阀可以被关闭。