Ignition timing control method for internal combustion engines at idle

Patent · Tue Sep 29 04:00:00 EDT 1987

OSTI ID:5832093

Kato, A; Otobe, Y; Kimura, S

This patent describes a method of controlling the timing of ignition of a mixture being supplied to an internal combustion engine on the basis of an ignition timing value determined in response to operating conditions of the engine. The method comprises the steps of: (1) determining whether or not the engine is in a predetermined idling region; (2) determining whether or not a temperature of the engine is above a predetermined value; (3) retarding the determined ignition timing value by a predetermined amount when the engine is determined to be in the predetermined idling region and the engine temperature is determined to be above the predetermined value; (4) setting a desired idling speed in response to operating conditions of the engine; (5) calculating a correction value by multiplying the difference between the set desired idling speed and actual engine speed by a predetermined coefficient; (6) correcting the ignition timing value retarded by the predetermined amount at the step (3), by the correction value thus calculated; and (7) controlling the ignition timing to the ignition timing value thus corrected.

• Assignee: Honda Giken Kogyo Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4696272
• OSTI ID: 5832093
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTER CALCULATIONS
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
CORRECTIONS
ENGINES
FUEL-AIR RATIO
FUNCTIONS
HEAT ENGINES
IGNITION
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
MONITORING
OPERATION
RESPONSE FUNCTIONS
TEMPERATURE MEASUREMENT
TIMING PROPERTIES
VELOCITY