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US 7,621,248 B2Granted
Internal combustion engine
AssigneeHonda Motor Co., Ltd.
InventorKazuhiko Chiba
Life of this patent
Estimating the term…
Abstract
To secure enough of an amount of intake air and an increase in a flow rate in a balanced manner to improve a filling efficiency for increasing power in an internal combustion engine. A combustion chamber is formed between a cylinder block and a cylinder head opposite to a top portion of a piston slidably fitted in the cylinder block. An intake path extends from an inlet pipe, separately or integrally, connected to the cylinder head to the cylinder head and is in communication with an intake valve port that opens to the top surface of the combustion chamber to be opened/closed with the intake valve. Intake paths are provided with a pair of throttle portions arranged with an interval in an air flow direction of the intake paths and an expanding portion positioned between the throttle portions.
Claims11
An internal combustion engine, comprising:
- a combustion chamber formed between a cylinder block and a cylinder head opposite to a top portion of a piston slidably fitted in the cylinder block;
- and
- an intake path extending from an inlet pipe separately or integrally connected to the cylinder head and communicating with an intake valve port that opens to a top surface of the combustion chamber to be opened/closed with an intake valve;
- wherein the intake path is provided with a pair of throttle portions arranged with an interval in an air flow direction of the intake path and an expanding portion positioned between the throttle portions,
- wherein a throttle body is arranged upstream of the pair of throttle portions, and
- wherein the throttle portions are provided to a bent portion of the intake path formed in a substantially U-shape in section as viewed in a projected plan orthogonal to an axial line of a crank shaft and parallel to a cylinder axial line.
3 more elements
An internal combustion engine, comprising:
- a combustion chamber formed between a cylinder block and a cylinder head opposite to a top portion of a piston slidably fitted in the cylinder block;
- and
- an intake path extending from an inlet pipe separately or integrally connected to the cylinder head and communicating with an intake valve port that opens to a top surface of the combustion chamber to be opened/closed with an intake valve;
- the intake path is provided with a pair of throttle portions arranged with an interval in an air flow direction of the intake path and an expanding portion positioned between the throttle portions, wherein the throttle portions are provided to a bent portion of the intake path formed in a substantially U-shape in section as viewed in a projected plan orthogonal to an axial line of a crank shaft and parallel to a cylinder axial line.
1 more element
An internal combustion engine, comprising:
- a piston slidably fitted in a cylinder block, a top portion of said piston together with said cylinder block and a cylinder head forming a combustion chamber;
- an intake path extending from an inlet pipe separately or integrally connected to the cylinder head and communicating with an intake valve port operatively connected to the top surface of the combustion chamber to be opened/closed with an intake valve;
- a pair of throttle portions arranged with an interval in an air flow direction of the intake path;
- and
- an expanding portion positioned between the throttle portions,
- wherein a throttle valve of a throttle body is arranged upstream of the pair of throttle portions, and
- wherein the throttle portions are provided to a bent portion of the intake path formed in a substantially U-shape in section as viewed in a projected plan orthogonal to an axial line of a crank shaft and parallel to a cylinder axial line.
4 more elements
An internal combustion engine, comprising:
- a combustion chamber formed between a cylinder block and a cylinder head opposite to a top portion of a piston slidably fitted in the cylinder block;
- and
- an intake path extending from an inlet pipe separately or integrally connected to the cylinder head and communicating with an intake valve port that opens to a top surface of the combustion chamber to be opened/closed with an intake valve;
- wherein the intake path is provided with a pair of throttle portions arranged with an interval in an air flow direction of the intake path and an expanding portion positioned between the throttle portions, and
- wherein a throttle body is arranged upstream of the pair of throttle portions, wherein a first throttle portion has a single path and a pair of projections extending inwardly and the second throttle portion has a pair of paths, each second throttle portion path having a pair of projections.
2 more elements
An internal combustion engine, comprising:
- a piston slidably fitted in a cylinder block, a top portion of said piston together with said cylinder block and a cylinder head forming a combustion chamber;
- an intake path extending from an inlet pipe separately or integrally connected to the cylinder head and communicating with an intake valve port operatively connected to the top surface of the combustion chamber to be opened/closed with an intake valve;
- a pair of throttle portions arranged with an interval in an air flow direction of the intake path;
- and
- an expanding portion positioned between the throttle portions,
- wherein a throttle valve of a throttle body is arranged upstream of the pair of throttle portions, and wherein a first throttle portion has a single path and a pair of projections extending inwardly and the second throttle portion has a pair of paths, each second throttle portion path having a pair of projections.
3 more elements
Dependencies are inferred from the claim text.