| 摘要 |
PURPOSE:To enable to smooth the rising of torque by making to carry out reduced cylinder, reduced cylinder supercharged, all cylinder and all cylinder supercharged operation successively according to the increase of load in that which the reduced cylinder operation is enabled by providing a mechanical supercharger in the intake passage and making the intake valve of a part of cylinders stop. CONSTITUTION:In that which a supercharger 28 driven by an engine is provided in an intake passage 14, and that which a valve stopping mechanism including a twofold type rocker arm 56 is provided on an intake valve 18, the engine load L is compared with the first prescribed value L1 by a control means 50, and, when L<L1, reduced cylinder operation is made to be carried out by opening a bypass valve 44, and bringing the intake valve 18 of a part of cylinders in stopped state. When L>=L1, reduced cylinder supercharged operation is made to be carried out by closing the bypass valve 44 and turning an electromagnetic clutch 38 ON. And according to the increase of engine load comparison judgment is carried out with regard to the second and third prescribed values L2 and L3 (L3>L2>L1), and all cylinder operation in which the bypass valve 44 is opened and the said intake valve 18 is brought in operating condition, and all cylinder supercharged operation in which the bypass valve 44 is closed and the electromagnetic clutch 38 is turned ON is made successively to carry out. |
