EP 3377743 A1 20180926 - VARIABLE COMPRESSION RATIO ENGINE
Title (en)
VARIABLE COMPRESSION RATIO ENGINE
Title (de)
MOTOR MIT VARIABLEM VERDICHTUNGSVERHÄLTNIS
Title (fr)
MOTEUR A RAPPORT VOLUMETRIQUE VARIABLE
Publication
Application
Priority
- FR 1561059 A 20151117
- FR 2016052985 W 20161117
Abstract (en)
[origin: CA3005570A1] The invention relates to a variable compression ratio engine comprising a stationary engine block in which movable members, including a combustion piston, a rod, and a crankshaft, interact to enable the piston to translate in a combustion cylinder of the engine block, defining a stroke of the combustion piston ranging from top dead center to bottom dead center, wherein the translation is caused by forces resulting from the combustion of a mixture in the cylinder and inertial forces of the crankshaft. The engine is characterized in that it comprises a self-contained device for adjusting the position of the top dead center of the combustion piston, the self-contained device being connected to or built into at least one of the movable members and having a high-pressure hydraulic chamber to counteract the combustion and inertial forces at the bottom dead center, a low-pressure hydraulic chamber to counteract the inertial forces at the top dead center, at least one calibrated pipe to enable hydraulic fluid to flow between the high- and low-pressure hydraulic chambers, and return means to bring the device back to a nominal position. The calibrated pipe and return means are configured so that the self-contained device forms a highly damped oscillating system.
IPC 8 full level
F02B 75/04 (2006.01); F16C 3/28 (2006.01); F16C 7/06 (2006.01)
CPC (source: EP KR US)
F02B 75/04 (2013.01 - EP US); F02B 75/045 (2013.01 - KR US); F02B 75/048 (2013.01 - US); F02D 15/02 (2013.01 - US); F16C 3/28 (2013.01 - EP KR US); F16C 7/04 (2013.01 - EP US); F16C 7/06 (2013.01 - EP KR US)
Citation (search report)
See references of WO 2017085410A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
FR 3043720 A1 20170519; FR 3043720 B1 20191108; AU 2016355079 A1 20180607; CA 3005570 A1 20170526; CN 108495984 A 20180904; CN 108495984 B 20201020; EP 3377743 A1 20180926; JP 2019501322 A 20190117; JP 6858412 B2 20210414; KR 20180081760 A 20180717; US 10626791 B2 20200421; US 2018328274 A1 20181115; WO 2017085410 A1 20170526
DOCDB simple family (application)
FR 1561059 A 20151117; AU 2016355079 A 20161117; CA 3005570 A 20161117; CN 201680067275 A 20161117; EP 16812995 A 20161117; FR 2016052985 W 20161117; JP 2018524190 A 20161117; KR 20187016009 A 20161117; US 201615776736 A 20161117