Spark ignition timing control system for spark ignition internal combustion engine with quicker advance of spark advance in transition from anti-knock mode to MBI mode control operation

Patent · Tue Oct 04 04:00:00 EDT 1988

OSTI ID:6672583

Morita, T

This patent describes a spark ignition timing control system comprising: first means for causing spark ignition in an engine combustion cylinder in response to a trigger signal; second means for deriving a basic spark advance on the basis of a preselected first engine operation parameter; third means for deriving a first correction value for modifying the basic spark advance so as to adjust a crank shaft angular position, at which a maximum pressure in an engine combustion chamber is obtained, toward a predetermined target angular position; fourth means for deriving a second correction value for retarding the basic spark advanced by a predetermined magnitude for suppressing engine knocking, the fourth means; and fifth means for deriving a spark advance on the basis of the basic spark advance and one of the first and second correction value. The fifth means normally selecting the first correction value for modifying the basic spark advance in a first mode and responsive to the engine knocking heavier than a predetermined level to select the second correction value for modifying the basic spark advance in a second mode and to hold the first correction value derived immediately before the engine locking heavier than the predetermined value is detected, and the fifth means being responsive to resumption of the first mode operation to modify the basic spark advance with the first correction value held during the second mode operation, and the fifth means producing the trigger signal when the crank shaft reaches an angular position identified by the spark advance.

• Assignee: Nissan Motor Co., Limited, Yokohama
• Patent Number(s): US 4774922
• OSTI ID: 6672583
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTERIZED CONTROL SYSTEMS
CONTROL
CONTROL SYSTEMS
DESIGN
ELECTRIC DISCHARGES
ELECTRIC SPARKS
ENGINES
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
KNOCK CONTROL
MACHINE PARTS
OPERATION
SHAFTS
SPARK IGNITION ENGINES
TIMING PROPERTIES