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1. (WO2018158540) DEVICE FOR CONTROLLING THE COMPRESSION RATIO OF AN ENGINE WITH VARIABLE COMPRESSION RATIO COMPRISING A TWO-WAY SOLENOID VALVE HAVING CONTROLLED PERMANENT LEAKAGE

Pub. No.:    WO/2018/158540    International Application No.:    PCT/FR2018/050470
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Thu Mar 01 00:59:59 CET 2018
IPC: F02D 15/00
F16K 11/16
Applicants: MCE 5 DEVELOPMENT
RABHI, Vianney
Inventors: BIGOT, Sylvain
TEYSSIER, Benjamin
BESSON, François
Title: DEVICE FOR CONTROLLING THE COMPRESSION RATIO OF AN ENGINE WITH VARIABLE COMPRESSION RATIO COMPRISING A TWO-WAY SOLENOID VALVE HAVING CONTROLLED PERMANENT LEAKAGE
Abstract:
The invention relates to a device for controlling the compression ratio of an engine with variable compression ratio, comprising an actuating cylinder comprising a piston (111) defining two chambers (112, 113) intended for receiving a pressurised fluid supplied by a pressure accumulator (33), a first fluid circuit (31A, 32A) connecting the upper chamber to the accumulator and comprising a first valve assembly (2A), and a second fluid circuit (31B, 32B) connecting the lower chamber to the accumulator (33) and comprising a second valve assembly (2B), characterised in that the first and/or second fluid circuit(s) at least include a calibrated fluid leakage opening.