Increased engine braking with adjustable intake valve timing
US6951198B1 · kind B1 · utility
15Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2004 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Jul 8, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/001
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system and method for operating at least an intake and exhaust valve in a cylinder with a piston of an engine in a vehicle are described. In one aspect, the method comprises maintaining at least the exhaust valve in a closed position during a period of net engine torque less than zero. Further, during said period of net engine torque less than zero, operating with at least the intake valve open, then closing the intake valve, and then opening the intake valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.