Port injection engine
AssigneeKubota Corporation
InventorsKosuke Aoki, Michisuke Iga
Life of this patent
Estimating the term…
Abstract
A port injection engine, in which injected fuel readily vaporizes inside suction ports, includes: a suction port; a suction valve; and a port injector that injects fuel to an inner peripheral surface of the suction port. When the fuel is burned in a predetermined combustion cycle, an injection start of a fuel injection period is set within an end part of a valve opening period before the suction valve is fully closed, during a combustion cycle previous to the predetermined combustion cycle. The end part of the valve opening period is preferably set from 50° to 20° before the suction valve is fully closed at a crank angle.
Claims20
A port injection engine comprising:
- a suction port;
- a suction valve;
- and
- a port injector that injects fuel to an inner peripheral surface of the suction port, and
- an engine ECU, wherein
- the port injector is electrically connected to the engine ECU, and
- the engine ECU is configured such that when the fuel is burned in a predetermined combustion cycle, an injection start of a fuel injection period is set within an end part of a valve opening period before the suction valve is fully closed, during a combustion cycle previous to the predetermined combustion cycle.
Dependencies are inferred from the claim text.