EP 1911940 A4 20100721 - DIRECT-ACTION VALVE LIFTER FOR INTERNAL COMBUSTION ENGINE
Title (en)
DIRECT-ACTION VALVE LIFTER FOR INTERNAL COMBUSTION ENGINE
Title (de)
DIREKT WIRKENDER VENTILSTÖSSEL FÜR VERBRENNUNGSMOTOR
Title (fr)
POUSSOIR DE SOUPAPE À ACTION DIRECTE POUR MOTEUR À COMBUSTION INTERNE
Publication
Application
Priority
- JP 2005015520 W 20050826
- JP 2005222462 A 20050801
Abstract (en)
[origin: EP1911940A1] OBJECTS: To provide a direct-acting type valve lifter that is simple in structure, involves a small number of components, and is capable of switching its valve lift between a high and a low lift. MEANS FOR CARRYING OUT THE INVENTION: The valve lifter is mounted between a cam unit (20) and a valve stem (15). The cam unit (20) comprises a high-lift cam (22) and a low-lift cam (24) integrated to the high-lift cam. The valve lifter (30) is equipped with a side lifter (32) for slidably lifting the low-lift cams (24), a center lifter (40) for slidably lifting the high-lift cam, and hydraulic means (oil groove) (11b) for sliding the center lifter (40) so as to switch the valve lift in two levels, i.e. to switch between a high and a low lift. A cylindrical body of the valve lifter is provided on the top end thereof with a slit (33) for allowing the high-lift cam to freely rotate therein, and with sliding surfaces (32a) serving as a side lifter (32) to be in sliding contact with the low lift cam. Formed in the body of the valve lifter (lifter body) is a through-hole 34 perpendicular to the slit (33), which accommodate therein the piston type center lifter (40) such that the center lifter (40) can be slidably moved by a hydraulic pressure. When the center lifter (40) is located at a position aligned with the slit (33), the cam unit assumes a high lift mode. On the other hand, at a position well offset from the slit (33), the cam unit assumes a low lift mode. Thus, the valve lifter of the invention is composed of a small number of components, so that dimension tolerance demanded for the respective components are much relaxed, which permits easy assembly of the parts.
IPC 8 full level
F01L 13/00 (2006.01)
CPC (source: EP KR US)
F01L 1/14 (2013.01 - KR); F01L 1/143 (2013.01 - EP US); F01L 13/00 (2013.01 - KR); F01L 13/0036 (2013.01 - EP US); F01L 1/08 (2013.01 - EP US); F01L 1/25 (2013.01 - EP US)
Citation (search report)
- [Y] JP H08177426 A 19960709 - UNISIA JECS CORP
- [Y] JP 2004204706 A 20040722 - MAZDA MOTOR
- [A] JP 2005061241 A 20050310 - NISSAN MOTOR
- See references of WO 2007015315A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1911940 A1 20080416; EP 1911940 A4 20100721; CN 101228337 A 20080723; JP 2007040114 A 20070215; JP 4829562 B2 20111207; KR 101011427 B1 20110128; KR 20080033273 A 20080416; US 2009056659 A1 20090305; WO 2007015315 A1 20070208
DOCDB simple family (application)
EP 05780849 A 20050826; CN 200580051148 A 20050826; JP 2005015520 W 20050826; JP 2005222462 A 20050801; KR 20087001260 A 20050826; US 99764605 A 20050826