초록 ▼

A method of controlling the timing of spark ignition for an internal combustion engine by monitoring the magnitude of vibration of the engine caused when the engine is knocking. A vibration sensor is mounted on the engine to detect the magnitude of the engine vibration, and the average value of the

A method of controlling the timing of spark ignition for an internal combustion engine by monitoring the magnitude of vibration of the engine caused when the engine is knocking. A vibration sensor is mounted on the engine to detect the magnitude of the engine vibration, and the average value of the magnitude of vibration of the engine prior to the engine piston arriving at the top dead center position is compared with the instantaneous value of the magnitude of vibration of the engine caused after the arrival of the piston at the top dead center position. Consequently, when the instantaneous value of the vibration is greater than the average value of the vibration, the spark timing is retarded to prevent the occurrence of knocking in the engine. To accurately detect knocking in the engine, the average value of the vibration is obtained by dividing the integrated value of the monitored vibration by the monitoring time.

대표청구항 ▼

A method for controlling the timing of spark ignition for an internal combustion engine having an output shaft rotated by a piston, the method comprising the steps of: establishing a timing characteristic of spark ignition relative to operating conditions of said engine so that a maximum output torq

A method for controlling the timing of spark ignition for an internal combustion engine having an output shaft rotated by a piston, the method comprising the steps of: establishing a timing characteristic of spark ignition relative to operating conditions of said engine so that a maximum output torque is produced by said output shaft in each of said operating conditions; monitoring the magnitude of load of said engine; comparing the magnitude of load monitored by said load monitoring step with a predetermined magnitude; detecting a first and second rotational positions of said engine before the arrival and at the arrival of said piston to the top dead center position thereof, respectively; monitoring the magnitude of vibration of said engine by a vibration responsive means coupled to said engine; averaging the magnitude of vibration monitored by said monitoring step during the rotation of said output shaft from said first to second rotational positions detected by said position detecting step; comparing the magnitude of vibration monitored by said vibration monitoring step with a reference magnitude proportional to the output average value of said averaging step; and changing the control mode of the timing of spark ignition in response to the load comparison result of said load comparing step such that the timing of spark ignition is controlled in accordance with said established timing characteristic of said establishing step and irrespective of the vibration comparison result of said vibration comparing step in response to the load comparison result indicative of the magnitude of load being smaller than said predetermined magnitude and that the timing of spark ignition is controlled in accordance with both said estblished timing characteristic of said establishing step and the vibration comparison result of said vibration comparing step in response to the load comparison result indicative of the magnitude of load being larger than said predetermined manitude.