| 摘要 |
PROBLEM TO BE SOLVED: To provide a multicylinder engine capable of more uniformly distributing gaseous mixture to each cylinder. SOLUTION: In the multicylinder engine, a butterfly valve is employed as a throttle valve 7. A top end 9 of an injector 8 is arranged just behind a valve stem 12 of the throttle valve 7. An extension axial line 8b of the injector 8 extended from a central axial line 8a of the injector 8 via the top end 9 of the injector 8 into a throttle air intake passage 6 is imagined, and the orientation of the injector 8 is set so that the extension axial line 8b of the injector 8 passes just behind the valve stem 12 of the throttle valve 7. Injection axial lines 10a of liquid fuel injection holes 10 extending from the liquid fuel injection holes 10 into the throttle air intake passage 6 are imagined, and the orientations of the liquid fuel injection holes 10 are set so that an angle of the injection axial line 10a of each liquid fuel injection hole 10 with respect to the extension axial line 8b of the injector 8 is equal to or smaller than 30°. COPYRIGHT: (C)2008,JPO&INPIT
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