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US 6,253,728 B1Granted
Direct injection gasoline engine with stratified charge combustion and homogeneous charge combustion
AssigneeNissan Motor Co., Ltd.
InventorsYutaka Matayoshi, Nobuhisa Jingu, Tadashi Nomura, Tsuyoshi Masuda
Life of this patent
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Abstract
An internal combustion gasoline engine has an air intake assembly which injects air through the cylinder head into the cylinder to generate swirl (horizontal vortex) flow (as opposed to tumble (vertical vortex) flow) for stratified charge combustion, and to generate tumble flow for homogeneous charge combustion. The piston includes a cavity combustion chamber at the top surface of the piston, the cavity combustion chamber having an increasing cross sectional area as the top of the piston is approached.
Claims21
An internal combustion gasoline engine, comprising:
- a cylinder;
- a cylinder head at a head of the cylinder;
- a piston within the cylinder;
- a fuel injector to inject fuel in the form of gasoline directly into the cylinder;
- an air intake assembly to introduce air through the cylinder head into the cylinder to generate swirl flow for stratified charge combustion and to generate tumble flow for homogeneous charge combustion by controlling air flow into the cylinder;
- and
- an ignition plug, in the cylinder head, to ignite an air-fuel mixture in the cylinder;
- wherein the piston includes
- a first incline surface approximately parallel to an intake-side inclined surface of the cylinder head;
- a second inclined surface approximately parallel to an exhaust-side inclined surface of the cylinder head;
- side surfaces connected to the first and the second inclined surfaces;
- and
- a cavity combustion chamber recessed in the first inclined surface, the cavity combustion chamber having an increasing cross sectional area as the top of the piston is approached.
10 more elements
Dependencies are inferred from the claim text.