Method and apparatus for reducing NOx in internal combustion engine
US4682577A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1985 |
| Grant date | Jul 28, 1987 |
| Priority date | — |
| Expiry date | Jan 29, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of reducing the amount of nitrogen oxides (NOx) in an internal combustion engine in which the air/fuel ratio is controlled higher than a theoreticl air/fuel ratio during normal operation of a vehicle, characterized in that the air/fuel ratio is controlled lower than the theoretical air-fuel ratio for a predetermined period of time during acceleration from the start of acceleration, the control being effected by means for detecting an accelerated state of the vehicle, means for measuring the lapse of time during acceleration from the start of acceleration and means for performing an acceleration increment correction upon detection of acceleration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.