Control method for the intake and exhaust valves of an engine and internal combustion engine comprising such valves
US7591244B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2005 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Aug 18, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/001
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
This method is for controlling the intake and exhaust valves of the cylinders of an internal combustion engine which is capable of operating either in four-stroke positive mode or in two-stroke braking mode. The control means pilot the valves so that at least a first exhaust valve of each cylinder (1) is opened (C43) prior to a first instant (t1) when the piston of said cylinder reaches its top dead center position and so that the first exhaust valve is kept in an open state (C43) with a first lift (L1) and for a first predetermined period of time (Δt1), prior to said first instant (t1), and at least an exhaust valve is kept in an open state, with a second lift (L2) higher than the first lift and for a second predetermined period of time (Δt2), after the first instant (t1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.