Apparatus for controlling ignition timing in engines

Details Apparatus for controlling ignition timing in engines Apparatus for controlling ignition timing in engines

1997-10-15

1999-02-16

Solis, Erick R.

Internal-combustion engines

High tension ignition system

Having dwell control

123630, 123644, F02P 1100

Patent

active

058710027

ABSTRACT:
An apparatus controls an ignition timing in association with rotation of an engine. The engine has an ignitor, an ignition coil and a spark plug. The ignitor provides the ignition coil with primary current to actuate the ignition coil. The ignition coil provides the spark plug with secondary current to actuate the spark plug when the primary current is cut off. A sensor detects the rotation of the engine by a predetermined angle and outputs a first signal based on the detection. An electronic control unit (ECU) computes an ignition timing of the ignition coil based on the first signal and driving state of the engine. The ECU outputs a second signal to the ignitor to control the primary current provided to the ignition coil. The ECU prohibits a provision of the primary current to the ignition coil when the primary current is provided to the ignition coil for a first predetermined time period. The ECU prohibits the provision of the primary current to the ignition coil based on the second predetermined time period greater than the first predetermined time period, when the engine starts to work.

REFERENCES:
patent: 4367722 (1983-01-01), Mizuno
patent: 4448180 (1984-05-01), Bodig et al.
patent: 4690122 (1987-09-01), Sasakura et al.
patent: 4739743 (1988-04-01), Iwata
patent: 4854292 (1989-08-01), Urushiwara et al.
patent: 5301650 (1994-04-01), Neumayer et al.

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