Apparatus and method for successively inactivating the cylinders of an electronically fuel-injected internal combustion engine in response to sensed engine load
In a multi-cylinder fuel injection type internal combustion engine, apparatus is provided for successively inactivating one or more cylinders of the engine by inhibiting the injection pulses supplied to the fuel injection units in response to a sensed engine load. The apparatus includes a forward-backward counter which operates in downward count mode to decrease the number of active cylinders when light load is sensed and in forward count mode to increase the number of active cylinders when heavy load is sensed. A ring counter is provided to generate recyclically occurring pulses on its output terminals equal in number to the cylinders successively in response to the occurrence of each injection pulse. A logic circuit is connected to the ring counter to generate injection inhibit pulses equal in number to the inactive cylinders.
- Assignee:
- Nissan Motor Co., Ltd.
- Patent Number(s):
- US 4064844
- OSTI ID:
- 5212504
- Resource Relation:
- Patent Priority Date: Priority date 17 Sep 1975, Japan
- Country of Publication:
- United States
- Language:
- English
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