Microprocessor-based electronic engine control system

Patent · Tue Mar 10 04:00:00 EST 1981

OSTI ID:6130216

Hartford, T W; Johnson, E A; Russo, F A

A method and apparatus are dscribed 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, and engine speed or period and the like. These parameters are sensed and then supplied to input circuits for signal conditioning and conversion to digital words usable by the microprocessor. The microprocessor-based electronic engine control 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 converting them to corresponding pulsewidth control signals or the like 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 4255789
• OSTI ID: 6130216
• Country of Publication: United States
• Language: English

Related Subjects

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