Closed-loop mixture controlled fuel injection system
US4545355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1984 |
| Grant date | Oct 8, 1985 |
| Priority date | — |
| Expiry date | Jan 27, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A closed-loop mixture control system for an internal combustion engine comprises an intake air pressure sensor, an engine speed sensor, an exhaust gas sensor for detecting the concentration of a predetermined composition of exhaust emissions from said engine, said concentration varying as a function of the air-fuel ratio of a mixture supplied to the engine, a memory having a plurality of storage locations, and a data processor. The processor derives a basic quantity of fuel to be injected to the engine as a function of the detected pressure and engine speed, a mixture trimming value as a function of the detected concentration, a fuel injection trimming value dependent on the mixture trimming value, and stores the fuel injection trimming value into a memory location exclusively addressable as a function of the detected engine speed. The stored fuel injection trimming value is read as a function of the detected engine speed from the memory and summed with the basic quantity in response to which the fuel quantity to be injected to the engine is controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.