Electronic ignition timing adjusting system for internal combustion engines

Patent · Tue Nov 25 04:00:00 EST 1986

OSTI ID:7226197

Koketsu, H; Saga, T; Yamada, T; Mizuno, T; Nakase, T

This patent describes an electronic ignition timing adjusting system for an internal combustion engine for operating the engine with electronically adjusted ignition timing, the ignition timing adjusting system comprising: (1) a magneto-type generator driven by the internal combustion engine; (2) a constant voltage circuit energized by the output of the generator for producing a constant voltage output; (3) angular position detecting means for detecting first and second angular positions of a crank shaft of the engine and generating first and second corresponding detection signals respectively; (4) an advance angle computing circuit connected to the angular position detecting means and the constant voltage circuit for receiving the corresponding detection signals. It also produces an electronically computed ignition timing signal in relation to the corresponding detection signals and the constant voltage output from the constant voltage circuit; (5) an advance angle adjusting circuit connected to the constant voltage circuit for detecting the constant voltage output from the constant voltage circuit. The circuit also cancels the electronically computed ignition timing signal when the constant voltage output from the constant voltage circuit is lower than a voltage which is an absolute minimum voltage necessary for the accurate computation of ignition timing.

• Assignee: Nippondenso Co., Ltd., Kariya
• Patent Number(s): US 4624234
• OSTI ID: 7226197
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
ELECTRIC GENERATORS
ELECTRIC POTENTIAL
ELECTRONIC CIRCUITS
ENGINES
HEAT ENGINES
IGNITION SYSTEMS
INCIDENCE ANGLE
INTERNAL COMBUSTION ENGINES
POSITIONING
SIGNALS
TIMING CIRCUITS