Lean mixture control system using a biased oxygen concentration sensor
US4546747A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1984 |
| Grant date | Oct 15, 1985 |
| Priority date | — |
| Expiry date | Jun 5, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1456
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A mixture control system comprises an oxygen sensor for generating a sensor signal varying linearly as a function of the oxygen concentration of exhaust emissions from an internal combustion engine when the air-fuel ratio of mixture supplied thereto is leaner than stoichiometric value. Optimum values of the sensor signal are stored in storage locations of a memory addressable as a function of detected engine operating parameters. A data processor determines the quantity of fuel to be supplied to the engine in accordance with the detected engine operating parameters, addresses the memory as a function of the detected engine operating parameters, detects a difference between the sensor signal and a signal addressed in the memory, integrates the difference and corrects the fuel quantity with the integrated value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.