Engine having fuel injection induced combustion chamber mixing
First Claim
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1. An engine assembly comprising:
- an engine structure defining a cylinder bore;
a piston disposed within the cylinder bore for reciprocal displacement between a top dead center position and a bottom dead center position; and
a direct injection fuel system including only a single fuel injector that provides a fuel spray to a combustion chamber defined by the piston and the cylinder bore, the fuel spray extending generally tangential to a circumference of the combustion chamber and defining a centerline extending in a direction radially across the combustion chamber;
wherein the fuel injector is in fluid communication with a pressurized fuel supply at an operating pressure of at least 120 mega Pascal (MPa).
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Abstract
An engine assembly may include an engine structure, a piston, and a direct injection fuel system. The engine structure may define a cylinder bore and the piston may be disposed within the cylinder bore for reciprocal displacement between a top dead center position and a bottom dead center position. The direct injection fuel system may include a fuel injector that provides a fuel spray to a combustion chamber defined by the piston and the cylinder bore. The fuel flow may extend generally tangential to a circumference of the combustion chamber and may define a centerline extending in a direction radially across the combustion chamber.
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Citations
18 Claims
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1. An engine assembly comprising:
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an engine structure defining a cylinder bore; a piston disposed within the cylinder bore for reciprocal displacement between a top dead center position and a bottom dead center position; and a direct injection fuel system including only a single fuel injector that provides a fuel spray to a combustion chamber defined by the piston and the cylinder bore, the fuel spray extending generally tangential to a circumference of the combustion chamber and defining a centerline extending in a direction radially across the combustion chamber; wherein the fuel injector is in fluid communication with a pressurized fuel supply at an operating pressure of at least 120 mega Pascal (MPa). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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providing only a single direct injection fuel injector in communication with a combustion chamber of an internal combustion engine defined by a cylinder bore in an engine structure and a piston disposed in the cylinder bore; injecting a fuel spray from the single fuel injector directly into the combustion chamber generally tangential to a circumferential sidewall of the combustion chamber; and generating rotational flow of the fuel spray and an air charge within the combustion chamber from the injecting; wherein the injecting includes providing a fuel spray to the fuel injector at an operating pressure of at least 120 mega Pascal (MPa). - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification