microprocessor-based engine control system

[Bruce Plecan]

Most interesting filed in  78, and granted 80.
About, 74 was when I saw my first CCC/EFI car.
Had so much wiring/relays/stuff (<g>), hard to say what it was.
Grumpy


| The Bendix Corporation, Southfield, MI
|
| http://patent.womplex.ibm.com/details?&pn10=US04242728
|
| 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 relating to one or more actual engine operating
| parameters such as manifold absolute pressure, throttle position, engine
| coolant temperature, air temperature, engine speed or period or 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 system computes one or more digital words indicative of
| particular computer-commanded engine control operations and output
| circuitry responds to predetermined computer-generated commands and to the
| computed digital command words for generating 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. A
| fuel management control "limp home" circuit is also disclosed which will
| allow a vehicle to be driven for a short distance such as to a repair
| station or the like whenever the microprocessor-controlled fuel injection
| system fails to function properly.
|