METHOD AND DEVICE FOR CONTROLLING AMOUNT OF INTAKE AIR FOR IGNITION TYPE INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To reduce pumping loss by controlling an amount of intake air into a cylinder using a variable valve system with a simple structure, and to improve fuel consumption and stabilize idling operation by combining the variable valve system and a throttle valve for increasing lean limit. SOLUTION: A solid cam 27 for driving an intake valve is provided with continuously changing at least a lifting amount of a cam profile in the axial direction from idling operation to full load operation through light load operation and high load rotation range. The solid cam 27 is displaced in the axial direction with being connected with a pedaling amount of an accelerator pedal to change at least the lifting amount of the intake valve 21 with being connected with the pedaling amount of the accelerator pedal and also change the opening of the throttle valve 8 with being connected with the pedaling amount of the accelerator pedal, and by combining these changes, the amount of the intake air into the cylinder is controlled.