System and method for controlling an ignition timing for an internal combustion engine
Patent
·
OSTI ID:5836200
A system is described for controlling an ignition timing for an internal combustion engine, comprising: (a) means for detecting occurrence of engine knocking; (b) means for detecting an internal pressure in an engine cylinder, (c) means for detecting an engine operating condition; (d) means for setting a basic ignition timing according to the engine operating condition; (e) means for detecting a crankshaft angular displacement; (f) means for calculating a knock correction quantity; (g) means for calculating an MBT correction quantity for correcting the instantaneous ignition timing so that the maximum internal cylinder pressure timing coincides with a target position at which a generation of engine output torque becomes maximum; (h) means for selecting one of the knock and MBT correction quantities whose value is smaller than the other correction quantity as an ignition timing correction quantity; (i) means for correcting the basic ignition timing on the basis of the instantaneous ignition timing correction quantity selected by the eight means; (j) means for comparing the instantaneous knock correction quantity with a previous ignition timing correction quantity and correcting the instantaneous knock correction quantity toward a retardation angle side by a predetermined value when a magnitude of the engine knocking exceeds the predetermined level and when the previous ignition timing correction; and (h) means for determining the instantaneous ignition timing from the corrected basis ignition timing by the ninth means and igniting fuel supplied to the engine at the determined ignition timing.
- Assignee:
- Nissan Motor Co., Limited
- Patent Number(s):
- US 4825832
- OSTI ID:
- 5836200
- Country of Publication:
- United States
- Language:
- English
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