Ignition timing control system for two-cycle internal combustion

Details Ignition timing control system for two-cycle internal combustion Ignition timing control system for two-cycle internal combustion

1985-10-23

1987-06-02

Dolinar, Andrew

Internal-combustion engines

Charge forming device

Fuel injection system

123427, F02P 5145

Patent

active

046694382

ABSTRACT:
An ignition timing control system for a two-cycle internal combustion engine compares a first reference signal which rises to a predetermined level as a first pulse signal is generated corresponding to a predetermined crank angle and which thereafter decays at a predetermined slope, and a second reference signal of generally trapezoidal shape and having a pulse width corresponding to the pulse width of a second pulse signal corresponding to a predetermined crank angle. When the signal level of the second reference signal rises above that of the first reference signal, an ignition signal is generated. A first reference signal control circuit generates a triangular signal in synchronism with the second pulse signal, which triangular signal rises at a predetermined slope, and controls the first reference signal in such a manner that the first reference signal decays at a slope gentler than the predetermined slope from an instant in time at which the signal level of the triangular signal exceeds a predetermined level.

REFERENCES:
patent: 4201163 (1980-05-01), Hattori et al.
patent: 4385617 (1983-05-01), Nakata et al.
patent: 4473050 (1984-09-01), Kondo et al.
patent: 4503823 (1985-03-01), Shibukawa et al.

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