| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the intake efficiency of air taken into an intake passage while suppressing a reduction in the chamber capacity of an air box by accurately supplying fuel from a second fuel injection valve mounted on an air box toward the center of the intake passage of a throttle body. <P>SOLUTION: The throttle body 70 having a first fuel injection valve J1 is arranged on a bottom wall portion 1a of the air box 1, and the second fuel injection valve J2 is arranged on a top wall portion of the air box 1. The top wall portion of the air box is formed as an inclined wall face 1c which has an acute angle of A-degree to a longitudinal axial center line X-X of the intake passage 71. A holder member 2 is arranged on the inclined wall face 1c, and an injection valve insertion cylindrical portion 2b integrally formed on the holder member 2 is arranged concentric with the longitudinal axial center line X-X of the intake passage 71. The second fuel injection valve J2 is inserted into an injection valve insertion hole 2c formed in the injection valve insertion cylindrical portion 2b. The second fuel injection valve J2 is arranged concentric with the longitudinal axial center line X-X of the intake passage 71. <P>COPYRIGHT: (C)2007,JPO&INPIT |
