Method and system for controlled exhaust gas recirculation in an internal combustion engine with application to retarding and powering function
US6170474A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1998 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Oct 2, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/01
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In an internal combustion engine braking system which may provide compression release braking and/or exhaust braking, methods and systems are disclosed of controlling the overlap between an exhaust gas recirculation event and an intake valve event to optimize engine braking at various engine operating speeds. Optimization may be achieved by selectively advancing and retarding the opening and closing of an exhaust valve for exhaust gas recirculation. The opening and closing of the exhaust valve may be carried out responsive to the monitored levels of such engine parameters as: exhaust manifold pressure, exhaust manifold temperature, cylinder pressure, and/or cylinder temperature. Various engine parameters may be monitored. Control of exhaust gas recirculation may be responsive thereto, such that a monitored parameter does not exceed a predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.