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U.S. Department of Energy
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Method and apparatus for ignition system spark timing control during engine cranking

Patent ·
OSTI ID:6211098
A method and apparatus for controlling ignition system spark timing. Engine revolution speed is sensed and whether the engine is under cranking or not is sensed. Correction means are provided which, when the engine is under cranking and at the same time the engine speed is lower than a predetermined value, decreases spark advance to small values in accordance with a drop in the engine speed. A digital computer is used to calculate the preferred spark advance values in the preferred embodiment.
Assignee:
Nissan Motor Co Ltd (Japan)
Patent Number(s):
US 4378770
OSTI ID:
6211098
Country of Publication:
United States
Language:
English