Knocking control system and method for an internal combustion engine

Patent · Tue Feb 07 04:00:00 EST 1989

OSTI ID:6302857

Abo, T

A knocking control system is described for a multi-cylinder engine comprising: (a) first means for detecting engine operating conditions; (b) second means for detecting the occurrence of knocking in each of the engine cylinders; (c) third means for setting a basic angle value for ignition timing on the basis of the engine operating conditions detected by the first means; (d) fourth means for calculating an angle correction amount for each engine cylinder by which the basic advance angle value set by the third means is to be adjusted toward the retarded-ignition side so as to suppress knocking when knocking is detected by the second means and toward the advanced-ignition side when the second means detects no knocking; (e) fifth means for calculating a limit value for the angle correction amounts calculated by the fourth means on the basis of an average value of the angle correction amounts for all cylinder and limiting the angel correction amounts to no more than the limit value; (f) sixth means for correcting the basic advance angle value set by the third means for each cylinder according to the angle correction amount for the corresponding cylinder calculated by the fourth means and limited by the fifth means and determining a final advance angle value for each cylinder from the correction thereof; and (g) seventh means for ignition and air-fuel mixture supplied to each engine cylinder on the basis of the final advance angle value for that cylinder.

• Assignee: Nissan Motor Co., Limited, Yokohama
• Patent Number(s): US 4802455
• OSTI ID: 6302857
• 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)
ANTIKNOCK RATINGS
COMPUTERIZED CONTROL SYSTEMS
CONTROL
CONTROL SYSTEMS
CORRECTIONS
DETECTION
ENGINES
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
IGNITION QUALITY
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
KNOCK CONTROL
METERING
OPERATION