PNEUMATICALLY ASSISTED CONTINUOUSLY VARIABLE TRANSMISSION

Title:

PNEUMATICALLY ASSISTED CONTINUOUSLY VARIABLE TRANSMISSION

Document Type and Number:

WIPO Patent Application WO/2014/052725

Kind Code:

A3

Abstract:

A CVT pulley includes a shaft having disposed thereon, a first and second sheave, and a spider. A spring biases the sheaves away from one another. The axially moveable second sheave is disposed axially between the axially fixed spider and the first sheave. A plurality of centrifugal weights, connected to either the spider or the second sheave, have a portion that moves radially outward with rotation of the shaft. The axial distance between the spider and the second sheave depends at least in part on the radial position of the portion which depends on the rotational speed. At least one cylinder is adapted to receive fluid. At least one piston, rotatable with the shaft, is adapted to move in the at least one cylinder in response to fluid being received therein, thereby selectively exerting force on one of the sheaves towards the other. CVTs and vehicles are also disclosed.

Inventors:

HOCHMAYR MARKUS (AT)
KORENJAK NORBERT (AT)
WILFLINGER JOHANN (AT)
HINDINGER THOMAS (AT)
RIOUX ROGER (CA)

Application Number:

PCT/US2013/062125

Publication Date:

July 16, 2015

Filing Date:

September 27, 2013

Export Citation:

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Assignee:

BRP POWERTRAIN GMBH & CO KG (AT)
BRP US INC (US)

International Classes:

F16H9/18; F16H55/56; F16H61/662

Domestic Patent References:

WO2012129417A1

2012-09-27

Foreign References:

US3939720A	1976-02-24
US20120179344A1	2012-07-12
US20110118066A1	2011-05-19
US20120238384A1	2012-09-20

Other References: