Borgwarner Inc.

Joseph P Goodsell

Matthew W Crump

Christopher Van Loon

Timothy K White

Sean R Simmons

George L Markley

Dale N Smith

Simon Barrette

Bradley F Adams

Paul Freemantle

Matthew E Junker

A tooth jump protection device is used to control chain slack and delay the torque at which chain jump occurs, thus increasing jump torque performance. The tooth jump protection device is preferably mounted to the transfer case.

Tooth jump protection device

A pattern for application to the face of the tensioner arm, guide or snubber in contact with a chain to intentionally break up the chain contact force between the back of the chain links and the tensioner arm, guide or snubber face. This is done to prevent alignment with the chain related orders which are causing NVH within the chain system or to increase overall NVH to obscure chain related orders.

Face of tensioner guide or arm with pattern to influence chain system NVH performance

A chain tensioning device which combats natural build-up of chain slack. In controlling the chain slack, the torque at which a chain jumps occurs is delayed resulting in a higher jump torque performance.

Method(s) to apply tension to increase drivetrain jump torque capacity

A parking mechanism located on a final drive or primary drive of a vehicle to engage or disengage an output shaft connected to wheels of the vehicle. The parking mechanism includes a back drive chain on the final drive or primary drive that engages with a parking pawl. A cam assembly biases the parking pawl to engage with the back drive chain to prevent rotation of the wheels.

Park system integration with chain drive

A hydraulic tensioner () and method of manufacture can include a housing (), a piston () moveable from a retracted position toward an extended position with respect to the housing () in response to fluid pressure, and a tensioner spring () biasing the piston () toward the extended position. The hydraulic tensioner () can include a modular sleeve () supported by the housing () and defining an aperture () for slidably receiving the piston () and defining an expandable fluid chamber (). The housing () can provide a fluid passage () for fluid communication between the expandable fluid chamber () and a source of pressurized fluid. The housing () can have a seat () in fluid communication with the aperture (). An end () of the modular sleeve () can be seated with respect to a seat () of the housing () to seal the fluid passage ().

Weight and cost optimized carrier for modular hydraulic tensioner

A tensioner comprising a piston slidably received within a piston bore of the housing having a plurality of grooves formed on an outer circumference, the piston forming a first pressure chamber with the piston bore. The tensioner uses a mechanism to remove a sliding pawl or expandable clip from engaging the grooves on the piston, such that the piston can move towards the housing and reduce chain load when fluid pressure is reduced in the first pressure chamber during engine shutdown, but not so much as to leave the chain uncontrolled during engine restart. The mechanism may for example be a fluid biased spool piston which engages the expandable clip or a pawl piston that engages a sliding pawl.

Growing community of inventors

Freeville, NY, United States of America

Joseph P Goodsell