초록 ▼

A method of detecting knocking intensity of an internal combustion engine uses a detector for detecting vibration propagated within the engine and a first calculation circuit for obtaining an average value of vibration sensed by the vibration detector within a predetermined crank angle before the to

A method of detecting knocking intensity of an internal combustion engine uses a detector for detecting vibration propagated within the engine and a first calculation circuit for obtaining an average value of vibration sensed by the vibration detector within a predetermined crank angle before the top dead center, and in which knocking is identified when the ratio between the above average value and the maximum value of vibration after the top dead center exceeds a predetermined value. This method also uses a second calculation circuit for obtaining a further average value of vibration detected by the vibration detector within a predetermined crank angle after the top dead center of the internal combustion engine, and a knocking discrimination circuit for generating a knocking indication output corresponding to the ratio between the average value of vibration before the top dead center obtained by said first calculation circuit and the average value of vibration after the top dead center by said second calculation circuit.

대표청구항 ▼

A method for controlling ignition spark timing for an internal combustion engine having an output shaft rotated by a piston, the method comprising the steps of: monitoring the magnitude of vibration of said engine by vibration responsive means coupled to said engine; integrating said magnitude of vi

A method for controlling ignition spark timing for an internal combustion engine having an output shaft rotated by a piston, the method comprising the steps of: monitoring the magnitude of vibration of said engine by vibration responsive means coupled to said engine; integrating said magnitude of vibration during a predetermined interval of rotation of said output shaft before arrival of a piston of said engine at the top dead center position; integrating a predetermined magnitude during said predetermined interval of rotation of said output shaft; dividing the output of said former integrating step by the output of said latter integrating step; holding said division output of said former dividing step after an arrival of said piston to the top dead center position; dividing said monitored magnitude of vibration by a holding output of said former holding step; and holding said division output of said latter dividing step at the same time as said former holding step; and controlling ignition spark timing supplied to said engine in response to a holding output of said latter holding step.