Residual burnt gas scavenging method with double intake valve lift in a direct-injection supercharged internal-combusion engine, notably of diesel type
US8037873B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2009 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Apr 16, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method of scavenging residual burnt gas of a direct-injection internal-combustion engine, notably of diesel type, comprising at least one cylinder (10) including a combustion chamber (12), at least one exhaust means (14) with an exhaust valve (18) controlled by exhaust control means (42), at least one intake means (24) with an intake valve (28) controlled by intake control means (40) and a processing unit (44) receiving the values relative to the intake pressure (Pa) and to the exhaust pressure (Pe) of the engine. The method consists, when the engine runs under low speed and high load conditions, in carrying out a sequence of opening/closing of exhaust valves (18) during the exhaust phase of the engine, during this exhaust valve opening/closing sequence, in carrying out at least one sequence of opening/closing of intake valves (28) so as to achieve scavenging of the residual burnt gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.