Two-cycle engine
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorKoji Morikawa
Life of this patent
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Abstract
A two-cycle engine having a fuel injector, scavenge port and an exhaust port is provided with a scavenge pump for supplying scavenging air into a cylinder. An exhaust rotary valve is connected to the exhaust port to open and close the port. Similarly, a scavenge rotary valve is connected to the scavenge port to open and close the port. Engine operating condition including engine speed and degree of depressing the accelerator pedal, representing the engine load, is inputted to a control unit, which variably controls the timings of opening and closing the exhaust and scavenge rotary valves in accordance with the engine operating condition.
Claims6
A two-cycle engine having a cylinder, a piston slidable in the cylinder, an exhaust port for being opened and closed by the piston, a scavenge port for being opened and closed by the piston, a scavenge pump connected to said scavenge port for supplying scavenging air into the cylinder, and a fuel injector for injecting fuel into the cylinder, comprising:
- an exhaust rotary valve connected to said exhaust port for opening and closing the exhaust port;
- a scavenge rotary valve connected to said scavenge port for opening and closing the scavenge port;
- detector means for detecting an operating condition of the engine;
- and
- control means responsive to the operating condition of the engine for variably controlling timings of opening and closing the exhaust and scavenge rotary valves.
Dependencies are inferred from the claim text.