Ignition apparatus for internal combustion engine

Details Ignition apparatus for internal combustion engine Ignition apparatus for internal combustion engine

1995-12-08

1996-12-24

Argenbright, Tony M.

Internal-combustion engines

High tension ignition system

Having dwell control

123645, F02P 304, F02P 1100

Patent

active

055865429

ABSTRACT:
An ignition apparatus for internal combustion engine includes an ignition power unit 1A having an ignition coil 13 and a power transistor 14 for supplying and shutting off a primary current i1 to the ignition coil; and a control circuit 2A for determining ignition timing of the internal combustion engine and a period for supply of the primary current in accordance with driving conditions D of the internal combustion engine so that it generates an ignition signal Ga in the form of a pulse to the power transistor. The primary current is supplied and shut off by the power transistor in accordance with the ignition signal to produce a high-tension secondary voltage V2 from the ignition coil. The control circuit includes an oscillation circuit 23 starting operation from a point when the ignition signal rises and operating for a predetermined period shorter than a pulse width of the ignition signal, the waveform of the ignition signal thereby being made to rise gradually. With this arrangement, there is obtained an ignition apparatus for internal combustion engine by which faulty operation can be prevented at a time when the ignition signal rises and the size and cost of the ignition apparatus can be reduced without using a high-tension diode.

REFERENCES:
patent: 4290406 (1981-09-01), Iyoda et al.
patent: 5392754 (1995-02-01), Hopper et al.

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