| 摘要 |
<p>To secure enough 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 including: 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 to the cylinder head and communicating 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 (70) are provided with a pair of throttle portions (70a and 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 and 70b) .</p> |
