Title:
DUAL PHASERS ASSEMBLED CONCENTRICALLY ON A CONCENTRIC CAMSHAFT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2012/109013
Kind Code:
A3
Abstract:
A variable cam timing phaser for an internal combustion engine having a concentric camshaft can include a stator (14) having an axis of rotation. An outer rotor (20) can rotate independently relative to the axis of rotation of the stator (14). A combination of an outer vane (22) and cavity (20a) can be associated with the outer rotor (20) to define first and second outer variable volume working chambers (20b, 20c). A radially inner located rotor (30) can rotate relative to the axis of rotation and independently of both the stator (14) and the outer rotor (20). A combination of an inner vane (32) and a cavity (30a) can be associated with the inner rotor (20) to define first and second inner variable volume working chambers (30b, 30c). When the first and second, outer and inner chambers (20b, 30b, 20c, 30c) selectively communicate with a source of pressurized fluid, phase orientation of the outer and inner rotors (20, 30) with respect to one another and with respect to the stator (14) is facilitated.
Inventors:
WIGSTEN MARK (US)
MARSH MICHAEL W (US)
MARSH MICHAEL W (US)
Application Number:
PCT/US2012/022463
Publication Date:
November 22, 2012
Filing Date:
January 25, 2012
Export Citation:
Assignee:
BORGWARNER INC (US)
WIGSTEN MARK (US)
MARSH MICHAEL W (US)
WIGSTEN MARK (US)
MARSH MICHAEL W (US)
International Classes:
F01L1/344; F01L1/34; F01L13/00
Foreign References:
| US20100186698A1 | 2010-07-29 | |||
| US7421989B2 | 2008-09-09 | |||
| US20100089353A1 | 2010-04-15 | |||
| US20030196621A1 | 2003-10-23 |
Attorney, Agent or Firm:
HELMHOLDT, Thomas D. et al. (3408 Greenspring LaneRochester Hills, Michigan, US)
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