| 摘要 |
PROBLEM TO BE SOLVED: To appropriately achieve both of reduction of errors of the fuel amount to be supplied to an engine and improvement of the air-fuel mixture charging efficiency. SOLUTION: An intake duct 19 for connecting a throttle device 18, which adjusts the intake amount of an engine 15 and an air cleaner 20 which purifies the air to be guided to the throttle device 18 to each other, includes: a flow-in opening 19f into which the air from the air cleaner 20 flows; a flow-out opening 19d from which the air flows out to the throttle device 18; and a cylindrical wall 19a forming an intake passage 39 connecting the flow-in opening 19f and the flow-out opening 19d to each other. The cylindrical wall 19a has an injector installation part 19h for installation of an upstream side injector 28, which injects fuel to the intake passage 39, and the injector installation part 19h is formed with a fuel injection opening 19i communicated with the intake passage 39. COPYRIGHT: (C)2011,JPO&INPIT |
