Engine intake port structure
AssigneeDoosan Infracore Co., Ltd.
InventorKu Yeon Han
Life of this patent
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Abstract
One exemplary embodiment of the present disclosure relates to an engine intake port structure. According to the engine intake port structure of the exemplary embodiment of the present disclosure, a chamfer is formed to be offset to either side from an end corner of an intake port. Accordingly, the inflow of a fuel gas is concentrated on a side in which an opening width of the chamfer is wide at the beginning of an opening stage when the intake port is opened/closed by a valve unit, and after the intake port is opened, the opening width is formed to be similar at four sides of the valve unit such that swirls formed in the fuel gas is weakened. That is, complete combustion of the fuel can be anticipated since the length of time during which the fuel gas remains in a combustion chamber is extended.
Claims6
An engine intake port structure comprising:
- a cylinder head block comprising an intake port and an exhaust port;
- a valve unit installed in the cylinder head block and configured to open and close the intake port;
- and
- a glow plug is installed at a glow plug installation hole that is formed between the intake port and the exhaust port,
- wherein the intake port is provided in multiple as first and second intake ports, and the first intake port is closer to the glow plug than the second intake port,
- wherein at an end corner of the first intake port, a first chamfer is formed to be offset with respect to the center of the first intake port and at an end corner of the second intake port, a second chamfer is formed to be offset with respect to the center of the second intake port,
- wherein an offset direction of the first chamfer is directed to an inner wall of a combustion chamber which is spaced apart from the glow plug, and an offset direction of the second chamfer is different than the offset direction of the first chamfer, and
- when the first and second intake ports are opened and closed by the valve unit, introduction of intake air is concentrated on a side in which an opening width of the first and second chamfers are wide at a beginning of an opening stage or at an end of a closing stage.
A diesel engine intake port structure which is formed to have torsion to control a swirl flow of a mixed gas, the diesel engine intake port structure comprising:
- a cylinder head block comprising a first intake port outlet, a second intake port outlet adjacent to the first intake port outlet, and an exhaust port inlet;
- first and second intake ports connected to the first and second intake port outlets and configured to guide air to a combustion chamber;
- valve sheet units provided in the cylinder head block and installed between the first and second intake port outlets and the first and second intake ports;
- a glow plug is installed at a glow plug installation hole that is formed between the first and second intake port outlets and the exhaust port inlet, and the first intake port outlet is closer to the glow plug than the second intake port outlet;
- and
- first and second chamfers which are formed such that an inclination angle toward the combustion chamber from environs of the first and second intake port outlets is changed, wherein an offset direction of the first chamfer is directed to an inner wall of the combustion chamber which is spaced apart from the glow plug, and an offset direction of the second chamfer is different than the offset direction of the first chamfer by at least 180 degrees.
Dependencies are inferred from the claim text.