| 摘要 |
PROBLEM TO BE SOLVED: To secure an amount of intake air and increase a flow rate in a balanced manner to improve a filling efficiency to increase power in an internal combustion engine in which a combustion chamber is formed between a cylinder block and a cylinder head with the top portion of a piston opposed thereto, and intake paths are formed to extend from an inlet pipe separately or integrally connected with the cylinder head to the cylinder head and to communicate with intake valve ports that open to the top surface of the combustion chamber to be opened and closed by intake valves. SOLUTION: The intake paths 70 are provided with a pair of throttle portions 70a, 70b arranged with an interval in an air flow direction of the intake paths 70 and an expanding portion 70c positioned between the throttle portions 70a, 70b. COPYRIGHT: (C)2008,JPO&INPIT
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