| 摘要 |
PURPOSE:To aim at improvements in a suction inertia effect over a wide range, by installing a variable device, which makes suction passage length reaching to a cylinder variable, while changing the timing of a suction valve corresponding to variations in the suction passage length. CONSTITUTION:A suction passage 7 to be interconnected to a suction port 3 installs a surge tank 9, while a passage length variable device 13 changing the suction passage's length is installed in this surge tank 9. The variable device 13 is driven and controlled by a control signal out of a control device 21 via a driving device 20. On the other hand, a valve timing change device 23 is installed in a valve mechanism 22 of a suction valve 5, then the length is changed by the suctin passage length variable device 13 and simultaneously the suction valve timing is also changed, thus inertial supercharging effect in times of high and low loads is improved. |
