Apparatus for controlling ignition timing for internal combustion engine

Patent · Tue Dec 02 04:00:00 EST 1986

OSTI ID:6956279

Kashimura, Y; Sugiura, N

An apparatus is described for controlling ignition timing for an internal combustion engine comprising a knock sensor, a memory into which a knock evaluation reference value is written, and an evaluation circuit which produces an ignition timing angle delay signal when the signal form the knock sensor exceeds the knock reference value written into the memory. The apparatus also comprises means for gradually advancing the angle of ignition timing for a specific cylinder and means for re-writing the knock evaluation reference value of the memory when a knock is generated by the advancing means. The means for gradually advancing the angle of ignition timing for a specific cylinder is operated when the engine revolution number and engine load are within a preset area after a reference crank angle signal from a crank angle sensor is generated.

• Assignee: Hitachi, Ltd., Tokyo
• Patent Number(s): US 4625692
• OSTI ID: 6956279
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMPUTERIZED CONTROL SYSTEMS
CONTROL
CONTROL SYSTEMS
CYLINDERS
ELECTRONIC CIRCUITS
ENGINES
HEAT ENGINES
IGNITION SYSTEMS
INCIDENCE ANGLE
INTERNAL COMBUSTION ENGINES
KNOCK CONTROL
MEMORY DEVICES
SIGNALS
TIMING CIRCUITS