EP 3519683 A1 20190807 - INTERNAL COMBUSTION ENGINE WITH A HYDRAULICALLY VARIABLE GAS EXCHANGE VALVE TRAIN
Title (en)
INTERNAL COMBUSTION ENGINE WITH A HYDRAULICALLY VARIABLE GAS EXCHANGE VALVE TRAIN
Title (de)
BRENNKRAFTMASCHINE MIT HYDRAULISCH VARIABLEM GASWECHSELVENTILTRIEB
Title (fr)
MOTEUR À COMBUSTION INTERNE À MÉCANISME DE DISTRIBUTION HYDRAULIQUEMENT VARIABLE DE SOUPAPE D'ÉCHANGE DES GAZ
Publication
Application
Priority
- DE 102016218918 A 20160929
- DE 2017100828 W 20170928
Abstract (en)
[origin: WO2018059627A1] An internal combustion engine having a hydraulically variable gas exchange valve train is proposed, which gas exchange valve train comprises the following: - a hydraulic housing (4) with a pressure chamber (5), a pressure relief chamber (6) and a vent duct (11), wherein the pressure chamber, the pressure relief chamber and the vent duct are connected to one another hydraulically, - a master piston (7) which is guided in the hydraulic housing, is driven on the housing outer side by a cam (3) and delimits the pressure chamber on the housing inner side, - a slave piston (8) which is guided in the hydraulic housing, drives the gas exchange valve (2) on the housing outer side and delimits the pressure chamber on the housing inner side, - and a hydraulic valve (9) which, in the closed state, interrupts the connection between the pressure relief chamber and the pressure chamber. The vent duct is connected hydraulically on the housing inner side via a throttle point (12) to the pressure relief chamber, and opens on the housing outer side below the pressure relief chamber with regard to the direction of gravity. The vent duct is to open into a hydraulic reservoir (13, 13', 13''), wherein the duct opening (14) lies below the normal level of the hydraulic reservoir with regard to the direction of gravity.
IPC 8 full level
F01L 9/02 (2006.01); F01L 9/10 (2021.01); F01L 9/12 (2021.01); F01L 9/14 (2021.01)
CPC (source: EP US)
F01L 3/06 (2013.01 - US); F01L 9/10 (2021.01 - EP US); F01L 9/12 (2021.01 - EP US); F01L 9/14 (2021.01 - EP US); F01L 2001/34446 (2013.01 - US)
Citation (search report)
See references of WO 2018059627A1
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)
DE 102016218918 A1 20180329; DE 102016218918 B4 20180913; CN 109715911 A 20190503; CN 109715911 B 20211012; EP 3519683 A1 20190807; EP 3519683 B1 20200902; US 10900389 B2 20210126; US 2019211718 A1 20190711; WO 2018059627 A1 20180405
DOCDB simple family (application)
DE 102016218918 A 20160929; CN 201780058183 A 20170928; DE 2017100828 W 20170928; EP 17787318 A 20170928; US 201716326944 A 20170928