Method of controlling a supercharged internal-combustion engine with at least two cylinders and engine using such a method
US7318314B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2004 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Dec 16, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A supercharged internal-combustion engine has at least two cylinders with a combustion cycle during which a cylinder (10) of the engine is in the intake phase with burnt gas scavenging in the vicinity of the top dead center (TDC) thereof while another cylinder is in the exhaust phase in the vicinity of the bottom dead center (BDC) thereof, the cylinders having at least one intake (12) with an intake valve (141, 142, 143, 144) and at least one exhaust (18) with an exhaust valve (201, 202, 203, 204). Controlling the engine includes carrying out scavenging of the burnt gases of the cylinder in the intake phase by a valve overlap stage by opening simultaneously its exhaust (201) and intake (141) valves, and controlling opening of exhaust valve (203) of the cylinder in the exhaust phase so that, during at least part of the overlap stage, the exhaust pressure (Pe) of the cylinder in the intake phase is lower than its intake pressure (Pa).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.