Device for controlling the compression rate of a variable compression ratio engine, comprising a two-way solenoid valve provided with a secondary circuit for fluid refilling
US10830160B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2018 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Feb 28, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2201/411
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for controlling the compression rate of a variable compression ratio engine comprises: an actuating cylinder comprising a piston defining two chambers for receiving a pressure fluid, a pressure accumulator supplying the pressure fluid, a first fluid circuit connecting the upper chamber to the accumulator and comprising a first valve assembly for controlling the flow of the fluid in the first fluid circuit, and a second fluid circuit connecting the lower chamber to the accumulator and comprising a second valve assembly for controlling the flow of a fluid in the second fluid circuit. At least one of the fluid circuits comprises a bypass conduit arranged so as to connect one of the chambers to the accumulator. The bypass conduit comprises a non-return valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.