Ignition timing control system for internal combustion engine

Patent · Tue Aug 19 04:00:00 EDT 1986

OSTI ID:5248117

Komurasaki, S

An ignition timing control system is described for an internal combustion engine of the type comprising switching means for interrupting the power supply to an ignition coil in response to an ignition signal, ignition signal generating means for generating the ignition signal in synchronism with the revolution of the engine, an acceleration sensor for detecting the vibratory acceleration of the engine, and control means for controlling the timing of the switching means by the ignition signal in accordance with engine knocking as determined by the acceleration sensor. The improvement described here consists of malfunction detection means for generating a malfunction detection signal in response to detection of a malfunction in the ignition timing control system, the malfunction detection means including gate means for receiving the sensor output and for cyclically blocking the passage of the sensor output within the malfunction detection means for at least one predetermined time interval in synchronism with operation of the switching means responsive to the ignition signals; and means in the control means responsive to the malfunction detection signal for controlling the timing of the switching means independently of the presence or absence of engine knocking. The switching means supplies power to the ignition coil during intervals each beginning with a starting time and terminating with a blocking time, and the gate means blocks the sensor output in response to gate control signals. The malfunction detection means further comprises gate control means for generating the gate control signals only at one or both of the starting times or blocking times.

• Assignee: Mitsubishi Denki Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4606316
• OSTI ID: 5248117
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ACCELERATION
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
FAILURES
GATING CIRCUITS
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
KNOCK CONTROL
MECHANICAL VIBRATIONS
SIGNALS
SPEED REGULATORS
SWITCHING CIRCUITS
SYNCHRONIZATION
TIMING CIRCUITS