Exhaust gas recirculation control system for an internal combustion engine
US4171691A · kind A · utility
15Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1977 |
| Grant date | Oct 23, 1979 |
| Priority date | — |
| Expiry date | Nov 10, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exhaust gas recirculation control system for an internal combustion engine wherein the control is effected so as to accord intake manifold pressure of the engine to target values predetermined for various operating conditions of the engine and retained in a memory means, wherein the target values are modified in accordance with atmospheric pressure to a compensater for the reduction in atmospheric pressure at high altitutde and to modify the ratio of exhaust gas recirculation in operation of the engine at high altitude when compared with its operation at sea level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.