Adaptive spark timing controller for an internal combustion engine

Patent · Tue Sep 19 04:00:00 EDT 1989

OSTI ID:5375852

Javaherian, H

This patent describes a system for controlling the ignition timing angle in the 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, in combination: means for determining the start of combustion in a cylinder; means for monitoring the value of an indicator function during rotation of the crankshaft after the start of combustion; means for sensing the fpeak value of the indicator function; means for determining the crankshaft angle at which the value of the indicator function is one half the sume of the values of the indicator function at the start of combustion and the peak value occurring at the end of combustion; and means for controlling the ignition timing angle to initiate combustion in the cylinders to establish the crankshaft angle and therefore the cylinder burn establish the crankshaft angle and therefore the cylinder burn center at a predetermined crankshaft angle.

• Assignee: General Motors Corp., Detroit, MI
• Patent Number(s): US 4867123
• Application Number: PPN: US 7201658A
• OSTI ID: 5375852
• 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