| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an intake system of an internal combustion engine capable of measuring an intake pressure of an induction system accurately in a 4-cycle engine.SOLUTION: An intake system of a 4-cycle engine includes: an intake valve that opens and closes an intake port 13IN communicating with a combustion chamber; an intake pipe member 10 that connects with the intake port 13IN; a throttle body 11 that connects with an upstream end of the intake pipe member 10 and has a throttle valve for adjusting an intake amount; a fuel injection device 20 that injects fuel to the intake pipe member 10; and a reed valve 56 that is provided in the intake pipe member 10 and has a reed 55 separating or coming in contact in response to an intake flow in the intake pipe member 10 to open and close. An intake pressure sensor 25 for detecting an intake pressure is installed in a position on a downstream side of the reed valve 56 and on an upstream side of the intake valve in the intake pipe member 10.</p> |
