Adaptive spark timing controller for an internal combustion engine

Patent · Tue Sep 19 04:00:00 EDT 1989

OSTI ID:5375828

Javaherian, H

This patent describes a system for determining the ignition timing value in an ignition control system for an internal combustion engine having cylinders and an output crankshaft rotated during operation of the engine. The ignition control system initiating combustion in each cylinder of the engine at the determined ignition timing value. The system comprising, combination: means for sensing the end of combustion in a cylinder of the engine, the means for sensing including means for determining when an indicator function is at a peak as the crankshaft rotates; means for determining the magnitude of the crankshaft angle after top dead center of the cylinder at which the end of combustion in the cylinder was sensed; and means for establishing the ignition timing value at a start of combustion angle {theta}inew in advance of top dead center of the cylinders having a predetermined relationship to the determined magnitude of the end of combustion angle.

• Assignee: General Motors Corp., Detroit, MI
• Patent Number(s): US 4867124
• Application Number: PPN: US 7167514A
• OSTI ID: 5375828
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
AUTOMATION
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
ENGINES
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
OPERATION
SHAFTS
SPARK IGNITION ENGINES
TIMING PROPERTIES