Method and apparatus for controlling the ignition timing of an i

Details Method and apparatus for controlling the ignition timing of an i Method and apparatus for controlling the ignition timing of an i

1997-01-10

1997-12-30

Dolinar, Andrew M.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

60284, F02P 515

Patent

active

057018685

ABSTRACT:
The heavy/light grade of fuel supplied to an internal combustion engine is detected, for example with a sensor or by detecting fluctuations in combustion pressure, and a retard angle correction amount for control of an ignition timing retard angle for activating an exhaust gas purification catalytic converter during a predetermined interval after engine start-up, is set based on the detected properties of the fuel. The time required for activating the exhaust gas purification catalytic converter can thus be shortened by retarding the ignition timing, corresponding to the heavy/light grade of the fuel, to increase the exhaust temperature while maintaining combustion stability.

REFERENCES:
patent: 4111010 (1978-09-01), Minami
patent: 4920494 (1990-04-01), Abo et al.
patent: 5345908 (1994-09-01), Nishimura et al.
JAPIO, Patent Abstracts of Japan (CD-ROM), vol. 94, No. 10, JP 6-288289 (Kenichi), Oct. 11, 1994.

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