公开(公告)号：US20230018219A1

公开(公告)日：2023-01-19

申请号：US17756952

申请日：2020-12-04

Applicant: MCE 5 Development

Inventor： René-Pierre Bertheau ,  Sylvain Bigot ,  Xavier Chemin

IPC: F02D15/02 ,  F02B75/04

Abstract: A hydraulic control system for a variable compression ratio engine, comprises: a control cylinder comprising a piston, a body in which two hydraulic chambers with equivalent sections are defined on either side of the piston and a return device arranged in one of the chambers, a hydraulic control circuit comprising: at least one duct connecting the two chambers to each other, and a controlled fluid discharging device for establishing or blocking a fluid communication between the chambers, at least one duct connecting one of the chambers to a low-pressure oil supply, and a refill valve, at least one duct connecting an oil outlet to at least one of the chambers, and a relief valve.