High performance digital ignition system for internal combustion engines

Patent · Tue Nov 15 00:00:00 EST 1988

OSTI ID:6487688

Brown, C R

This patent describes a spark ignition system for an internal combustion engine comprising: a free running source of equally time-spaced pulses which periodically switch between logic ''high'' and logic ''low'' levels; engine angular position sensing means for generating an engine timing signal characterized by the presence of a first logic level when the engine angular position is within a first angular range and by the presence of a second logic level when the engine angular position is within a second angular range which does not include the first angular range. The first engine angular position corresponding to at least a portion of an engine cylinder power stroke; a triggerable source of intermittent high voltage pulses, the triggerable source having an output delivering a single high voltage single-polarity pulse each time it is triggered. The triggerable source consists of an ignition coil including a single-ended low voltage primary winding and a high voltage secondary winding; trigger signal developing means having an input and an output, the trigger signal developing means output being connected to the triggerable source and adapted to trigger the triggerable source in response to the transition of a signal between logic ''low'' and logic ''high'' appearing at the input to the trigger signal developing means, the trigger signal developing means including an electronic switch disposed in series with the ignition coil primary winding and a d-c electrical power source such that, when the electronic switch is closed, current from the power source passes through the primary winding to generate a magnetic field and when the electronic switch is opened, the magnetic field collapses to induce a high voltage plus in the secondary winding.

• Assignee: NOV; NOV-89-037139; EDB-89-032677
• Patent Number(s): US 4784105
• OSTI ID: 6487688
• Resource Relation: Patent File Date: Filed date 23 Mar 1987
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
IGNITION SYSTEMS
DIGITAL SYSTEMS
SPARK IGNITION ENGINES
COMPUTERIZED CONTROL SYSTEMS
ELECTROMAGNETIC PULSES
FREQUENCY MEASUREMENT
GATING CIRCUITS
PULSE GENERATORS
SIGNAL CONDITIONING
CONTROL SYSTEMS
ELECTROMAGNETIC RADIATION
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
ENGINES
EQUIPMENT
FUNCTION GENERATORS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
PULSES
RADIATIONS
330100* - Internal Combustion Engines
990220 - Computers
Computerized Models
& Computer Programs- (1987-1989)