microprocessor-based engine control system

[David C. Allen]

It would be interesting to look up the patents that a listed on the actual 
ECU.

David

At 10:52 PM 11/30/1999 -0500, you wrote:
>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.
>|