Oxygen sensor feedback loop digital electronic signal integrator for internal combustion engine control
US4276600A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1978 |
| Grant date | Jun 30, 1981 |
| Priority date | — |
| Expiry date | Feb 27, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/28
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
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, and engine speed or period and the like. These parameters are sensed or measured and then the value thereof is supplied to input circuits for signal conditioning and conversion to digital words usable by the microprocessor. The microprocessor system computes digital control 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 converting them into 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. The engine control system further includes an oxygen sensor feedback system for providing reliable data to said microprocessor for command control p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.