Switching control of solenoid current in fuel injection systems

Patent · Tue Dec 30 04:00:00 EST 1980

OSTI ID:6574007

Harper, P D; Weber, R E

A method and apparatus for controlling the various functions of an internal combustion engine using a program-controlled microprocessor having a memory preprogrammed with various control laws and associated control schedules receives information concerning one or more engine-operating parameters such as manifold pressure, throttle position, engine coolant temperature, air temperature, engine speed or period and the like. These parameters are sensed and then supplied to input circuits for signal conditioning and conversion into digital words usable by the microprocessor. The microprocessor system computes a digital word indicative of a computer-commanded engine control operation, and output circuitry responds to predetermined computer-generated commands and to the computed digital command words for outputting corresponding pulse-width control signals for controlling such engine operations as fuel-injection, ignition timing, proportional and/or on-off egr control, and the like.

• Assignee: Bendix Corp The
• Patent Number(s): US 4242729
• OSTI ID: 6574007
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMPUTERIZED CONTROL SYSTEMS
COMPUTERS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLOW REGULATORS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
POLLUTION CONTROL EQUIPMENT
VALVES