Title:
IMPROVEMENTS TO LATCHABLE CAM-LOBE SYSTEMS FOR POPPET VALVE MOTION CONTROL
Document Type and Number:
WIPO Patent Application WO2004001199
Kind Code:
A3
Abstract:
A camshaft assembly with one or several slideable camlobes, where each slideable cam (707) is capable of latching in 2 positions perpendicular to the main axis of the camshaft, so the slideable camlobe is either latched to provide the controlling valve lift, or the slideable camlobe is withdrawn within the lift curve of a pair of adjacent cams (712) and latched in this retracted position, so that these latter cams control the valve lift. The movable cam may comprise an upper cam (707) which performs the lifting of the valve, and a retaining cap or clip (708) which secures the upper cam (707) to the camshaft axle (706). The latching of the slideable cam to the cam axle can be achieved with at least one latching pin (702) which engages with holes (701 & 711) either in the slideable cam or a cam tube. The slideable cam is arranged so that the distance, on the centreline of the slideable cam, from the nose (800) of the slideable cam to the axis through the latching hole (701) for the inactive cam position, is less than the distance from the nose (801) of the fixed low lift cams to the centreline of the latching pin major axis (802).
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| WO/2012/126756 | CAMSHAFT ASSEMBLY AND METHOD FOR PRODUCING A CAMSHAFT ASSEMBLY |
| WO/2016/071017 | CAMSHAFT HAVING AT LEAST ONE AXIALLY FIXED SLIDING ELEMENT |
Inventors:
PIRAULT JEAN-PIERRE
Application Number:
PCT/GB2003/002594
Publication Date:
March 04, 2004
Filing Date:
June 17, 2003
Export Citation:
Assignee:
POWERTRAIN TECHNOLOGY LTD (GB)
International Classes:
F01L1/047; F01L1/08; F01L13/00; F16H53/04; (IPC1-7): F01L13/00
Domestic Patent References:
| WO1995023912A1 | 1995-09-08 |
Foreign References:
| US5746166A | 1998-05-05 | |||
| DE10030904A1 | 2002-01-31 | |||
| US5855190A | 1999-01-05 | |||
| EP1172528A1 | 2002-01-16 | |||
| US4886022A | 1989-12-12 | |||
| US5992265A | 1999-11-30 | |||
| US5404770A | 1995-04-11 |
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