Ignition timing control method for internal combustion engines

Patent · Tue Feb 09 04:00:00 EST 1988

OSTI ID:5422333

Kimura, S

In a method of controlling the timing of ignition of a mixture in an internal combustion engine, sensing predetermined crank angle positions intervening between the predetermined reference crank angle position of each of the cylinders and the predetermined reference crank angle position of the next cylinder to generate a second control signal indicative of the sensed predetermined crank angle positions, calculating a desired value of ignition timing at a timing corresponding to a first specific one of the sensed predetermined crank angle positions of which the second control signal is indicative, setting data indicative of the calculated desired value of ignition timing in counter means to start counting based upon the set data at a second specific one of the predetermined crank angle positions, which is subsequent to the first specific one of the predetermined crank angle positions, and effecting ignition of the mixture when the counting is completed. This patent describes the improvement comprising the following steps: (1) calculating a correct value for the desired value of ignition timing as well as the desired value of ignition timing at the timing corresponding to the first specific one of the sensed predetermine crank angle positions; (2) determining from the calculated desired value of ignition timing whether the ignition is to be effected after a third specific one of the predetermined crank angle positions which is subsequent to the specific one of the predetermined crank angle positions; and (3) when it is determined that the ignition is to be effected after the third specific one of the predetermined crank angle positions, updating the data indicative of the calculated desired value of ignition timing set in the counting means to the correction value.

• Assignee: Honda Giken Kogyo Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4723520
• OSTI ID: 5422333
• 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)
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
CORRECTIONS
CYLINDERS
ENGINES
HEAT ENGINES
IGNITION
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
METERING
OPERATION
TIMING PROPERTIES