| 摘要 |
A method and apparatus for controlling the supply of fuel to selected ones of the cylinders of a multi-cylinder internal combustion engine. The apparatus includes solenoid operated valves which are electrically energized to cause fuel to be supplied to the respective cylinders of the engine. Actuating current pulses are normally applied to all valves to discharge the required amount of fuel for each cylinder power stroke. In accordance with the present invention, an electronic system selectively disables certain of the solenoid operated valves to prevent fuel from being injected so as to cause the associated cylinder to pump air only. This unpowered cylinder operation may be used for any desired purpose, such as to pump air or to reduce the number of cylinders using fuel during idling or low power operation.
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