Programmed electronic advance for engines
An ignition advance control is described for an internal combustion engine including a crankshaft, a throttle control, and at least one cylinder, the ignition advance control comprising a spark ignition circuit associated with the cylinder and including trigger means operative to cause an ignition spark, means for generating a control pulse associated with the cylinder, latch means for enabling the trigger means in response to generation of the control pulse, means for generating a constant plurality of sequentially occurring electrical reference pulses during each revolution of the crankshaft, means for counting the reference pulses developed during each revolution of the crankshaft, means for firing the enabled trigger means in response to the counting means counting a predetermined number of the reference pulses to cause the ignition spark at a predetermined ignition point in each revolution of the crankshaft, means for sensing the position of the throttle control, and means responsive to the throttle sensing means for varying the predetermined number of reference pulses solely in accordance with the position of the throttle control to vary the predetermined ignition point as appropriate for the position of the throttle control.
- Assignee:
- Outboard Marine Corp., Waukegan, IL
- Patent Number(s):
- US 4646696
- OSTI ID:
- 6720729
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330101* -- Internal Combustion Engines-- Spark-Ignition
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
CYLINDERS
ELECTRIC DISCHARGES
ELECTRIC SPARKS
ELECTRONIC CIRCUITS
ENGINES
HEAT ENGINES
IGNITION
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
POSITIONING
PULSE CIRCUITS
PULSE TECHNIQUES
SHAFTS
SPARK IGNITION ENGINES
TRIGGER CIRCUITS