Patent ID: 6257176
Filing Date: 2001-07-10
Classification: F01L,F02B

Abstract:
A controller of a variable cycle internal combustion engine, said engine comprising:a first cam driving an inlet valve and an exhaust valve, said first cam having at least one first projection;a second cam driving the inlet valve and exhaust valve, said second cam having at least one second projection, the number of which is more than that of said first projection; anda cam change mechanism for changeover between said first and second cams, so that said engine is operable at different engine cycles; anda controller comprising:an engine running state detector detecting engine load and engine revolving speed, said engine running state detector using an inlet-pipe-internal absolute pressure as a parameter representing the engine load; andcontrol means for selecting an engine cycle based on the detected engine load and engine revolving speed and controlling said cam change mechanism so as to operate at the selected engine cycle,wherein said controller selects said first cam, when the engine revolving speed is not more than a predetermined revolving speed and the inlet-pipe-internal absolute pressure is not more than a predetermined pressure.