EP 0962646 A4 20000920 - EXHAUST GAS RECIRCULATION CONTROL VALVE DEVICE
Title (en)
EXHAUST GAS RECIRCULATION CONTROL VALVE DEVICE
Title (de)
KONTROLLVENTIL FÜR ABGASRÜCKFÜHRUNG
Title (fr)
DISPOSITIF A SOUPAPE DE COMMANDE DE RECYCLAGE DES GAZ D'ECHAPPEMENT
Publication
Application
Priority
JP 9703822 W 19971022
Abstract (en)
[origin: WO9920886A1] An exhaust gas recirculation control valve device, in which wall surfaces at an inlet of an exhaust gas passage are enhanced in anticorrosion against exhaust gases to suppress deposit of fine particules thereto and significantly reduce frequency of maintenance, and which is excellent in assembling quality and inexpensive. The exhaust gas recirculation control valve device comprises a housing (41) having therein an exhaust gas passage (33), a control valve (7) provided in the housing for controlling an amount of exhaust gases circulated in an intake pipe of an engine through the exhaust gas passage, a shield body (42) formed from a material, which is superior to the housing in anticorrosion against exhaust gases, into a cylinder having a valve seat at a tip end thereof, the valve seat abutting against the control valve, the shield body being mounted at an inlet of the exhaust gas passage to cover an inner wall surface of the inlet of the exhaust gas passage, a valve stem (23) connected to the control valve and slidably arranged relative to a slide member press fitted into the housing, a diaphragm (8) mounted to an end of the valve stem and adapted to be actuated by a pressure difference to open and close the control valve, and a negative pressure casing (14) for forming the pressure difference through the diaphragm.
IPC 1-7
IPC 8 full level
F02M 25/07 (2006.01)
CPC (source: EP)
F02M 26/11 (2016.02); F02M 26/55 (2016.02); F02M 26/68 (2016.02); F02M 26/50 (2016.02)
Citation (search report)
- [XY] EP 0753656 A1 19970115 - AISAN IND [JP]
- [YA] US 4171689 A 19791023 - EHEIM FRANZ [DE]
- [YA] WO 9732125 A1 19970904 - BOSCH GMBH ROBERT [DE], et al
- [A] DE 19519204 A1 19961205 - PIERBURG AG [DE]
- [EA] US 6044827 A 20000404 - PFAFF RUEDIGER [DE], et al
- See references of WO 9920886A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 9920886 A1 19990429; EP 0962646 A1 19991208; EP 0962646 A4 20000920
DOCDB simple family (application)
JP 9703822 W 19971022; EP 97909586 A 19971022