초록 ▼

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 suc

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 to digital words usable by the microprocessor system. 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 converting them to 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 system is provided for sensing the immediate need for acceleration enrichment (by monitoring for an abrupt increase in manifold absolute pressure or throttle angle) and an interrupt request signal is sent to the microprocessor system which responds to the interrupt request to compute an acceleration enrichment digital word which the output circuitry uses to provide an immediate additional charge of fuel, and if a fuel charge is currently being applied at the time of the interrupt request, the additional acceleration enrichment fuel charge is applied immediately upon the completion of the normally-applied fuel charge.

대표청구항 ▼

In an internal combustion engine having an intake system, an exhaust system, an engine block, a plurality of cylinders disposed in said engine block, a piston mounted for reciprocal movement within each of said plurality of cylinders, throttle means disposed in said intake system for controlling the

In an internal combustion engine having an intake system, an exhaust system, an engine block, a plurality of cylinders disposed in said engine block, a piston mounted for reciprocal movement within each of said plurality of cylinders, throttle means disposed in said intake system for controlling the air flow into said plurality of cylinders, means generating a fuel control signal in response to sensed engine parameters, an electronic engine control system including means responsive to said fuel control signal for selectively supplying a controlled quantity of fuel into selected one or more of said plurality of cylinders, and means for controlling the timing and duration of the ignition timing of said air and fuel supplied to said selected one or more cylinders; said electronic engine control system comprising program-controlled computing means, memory means for storing data representative of look-up tables of control schedules and control means for implementing a predetermined fuel control law; means for sensing at least one engine-operating parameter for detecting a need for acceleration enrichment and for generating an acceleration enrichment command in response thereto; means responsive to said acceleration enrichment command for transmitting an acceleration enrichment interrupt request signal to said computing means, said computing means being responsive to said acceleration enrichment interrupt request signal for generating signals to implement said fuel control law stored in said memory means and generating an acceleration enrichment fuel pulse command word signal in response thereto; and means responsive to said acceleration enrichment fuel pulse command word signal for initiating the immediate generation of a separate one-time acceleration enrichment fuel control pulse in response thereto or, if a normal fuel control pulse is currently being generated at the time of said acceleration enrichment interrupt request, for initiating the generation of said additional onetime acceleration enrichment fuel control pulse immediately upon the completion of said currently-generated normal fuel control pulse.