Air-to-fuel ratio control system for an engine
US4572135A · kind A · utility
9Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1984 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Oct 29, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1489
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a carburetor in which air-to-fuel ratio is feedback controlled into a stoichiometric mixture ratio in response to oxygen sensor signals, air-to-fuel ratio is determined to a lower value to supply a rich mixture to an engine when intake air temperature and engine coolant temperature both exceed each reference value, so that engine overheat can be prevented at high temperatures. The lower air-to-fuel ratio is determined to a fixed value or to an appropriate value under consideration of intake air temperature and engine coolant temperature or additionally vehicle speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.