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US 5,038,739 AGranted
Control arrangement for multi-cylinder two cycle engine
AssigneeNissan Motor Co., Ltd.
InventorMitsunori Ishii
Life of this patent
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Abstract
A multi-cylinder 2 cycle engine having n cylinders has fuel injected and ignited at (n-1).times.360/n crank angle intervals. This induces the situation wherein combustions occur in each cylinder at n-1 cycle intervals. This provides at least one piston stroke for each cylinder during in which no combustion takes place and fresh air is pumped through the combustion chamber in a manner to scavenge residual combustion gases therefrom.
Claims4
In a multi-cylinder two cycle internal combustion engine having n cylinders
- an engine load sensor;
- an engine speed sensor;
- fuel injection control means, said fuel injection control means being responsive to said engine load sensor and said engine speed sensor and arranged to detect the engine operating in a low load-low speed zone, said fuel injection means including circuitry for injecting fuel into any given cylinder at (n-1).times.360/n crank angle intervals and so that combustions in said any given cylinder occur at n-1 cycles, during said low speed low load mode of operation.
In a method of operating a two cycle internal combustion engine having n cylinders, the steps of:
- sensing engine load;
- sending engine speed;
- detecting the engine operating in a predetermined engine speed-load zone;
- controlling the fuel injection so that fuel is injected into a cylinder at (n-1).times.360/n crank angle intervals and so that combustions in said any given cylinder occur at n-1 cycles, when said engine is detected as operating in said predetermined engine speed-load zone.
1 more element
Dependencies are inferred from the claim text.