EP 3524816 A1 20190814 - DUAL SWITCH ELECTROMAGNETIC VALVE-BASED LEVEL 3 OR LEVEL 4 VARIABLE DISPLACEMENT OIL PUMP
Title (en)
DUAL SWITCH ELECTROMAGNETIC VALVE-BASED LEVEL 3 OR LEVEL 4 VARIABLE DISPLACEMENT OIL PUMP
Title (de)
ÖLPUMPE MIT VARIABLER VERDRÄNGUNG AUF STUFE 3 ODER STUFE 4 BASIEREND AUF EINEM ELEKTROMAGNETISCHEN VENTIL MIT DOPPELSCHALTER
Title (fr)
POMPE À HUILE À CYLINDRÉE VARIABLE DE NIVEAU 3 OU DE NIVEAU 4 À BASE DE SOUPAPE ÉLECTROMAGNÉTIQUE À COMMUTATEUR DOUBLE
Publication
Application
Priority
- CN 201711021757 A 20171027
- CN 2018097838 W 20180801
Abstract (en)
A three-stage or four-stage variable displacement engine oil pump based on two switch solenoid valves uses a structure of two variable feedback cavities. One variable feedback cavity is directly connected to a pump outlet, and the other variable feedback cavity is controlled by a pressure control valve. The control valve includes two independent control cavities that are both in communication with a main oil gallery and are each controlled by a switch solenoid valve. The two switch solenoid valves are in four different combined states: off and off, on and off, off and on, and on and on, so that the pressure control valve has four different pressure control modes, and an engine oil pump correspondingly forms four different pressure control modes, which can meet pressure requirements of various different working conditions of an engine, to realize a pressure control target that is very close to actual requirements of the engine; power saving of the pump is very close to that of a continuously variable displacement engine oil pump controlled by an electro-hydraulic proportional valve, and the control modes in the present invention are logically simple and reliable, fast in response, and stable in pressure control, and have a small pressure fluctuation.
IPC 8 full level
F04C 2/344 (2006.01); F04C 14/24 (2006.01)
CPC (source: EP)
F01M 1/02 (2013.01); F04B 49/22 (2013.01); F04C 2/344 (2013.01); F04C 2/3442 (2013.01); F04C 14/223 (2013.01); F04C 14/24 (2013.01); F04C 2240/811 (2013.01)
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)
EP 3524816 A1 20190814; EP 3524816 A4 20200603; CN 107605720 A 20180119; CN 107605720 B 20190628; WO 2019080570 A1 20190502
DOCDB simple family (application)
EP 18865337 A 20180801; CN 201711021757 A 20171027; CN 2018097838 W 20180801