Apparatus repetitively controlling the composition of exhaust emissions from internal combustion engines, in predetermined intervals
US4040394A · kind A · utility
25Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1975 |
| Grant date | Aug 9, 1977 |
| Priority date | — |
| Expiry date | Jul 21, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2700/09
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Certain intervals are determined in which output signals from an exhaust gas sensing device are sensed, and then applied to a control circuit, to control the fuel supply system (carburetor, or fuel injection system) in such a direction that a predetermined ratio of fuel and air is being supplied to the engine to provide exhaust gases of predetermined composition. The intervals are determined by a logic circuit which has applied thereto engine operating parameters such as operating time of the engine after having been started, engine speed, engine power condition (idling, or supplying power), engine temperature, or the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.