Bombardier Recreational Products Inc.

Brp-rotax Gmbh & Co Kg

Sebastien Thibault

Berthold Fecteau

Luc Champigny

Bertrand Mallette

Bruno Schuehmacher

Frederic Desjardins

Roger Rioux

Michel Lefebvre

Jonathan Claveau

Roland Ennsmann

Christian Berger

Francois Leboeuf

Pascal Gagnon

Michael Seyrl

Marc Giguere

Roland Wimmer

Felix Labonte

Gabriel Dessureault

Claude Fortin

Vincent Gamache

A snowmobile including: a frame; an engine supported by the frame; an exhaust pipe connected to the engine; and a turbocharger connected to the exhaust pipe. The turbocharger includes a bypass conduit fluidly communicating with the turbocharger housing and including an exhaust inlet fluidly connected to the exhaust pipe; a valve in the bypass conduit for controlling the flow of exhaust gas, and an exhaust collector. The valve is movable between first and second positions, a first flow path passing through the exhaust inlet, through the bypass conduit, and into the exhaust collector, a second flow path passing through the exhaust inlet, through the bypass conduit, through the exhaust turbine, and into the exhaust collector, in the first position, a majority of the exhaust gas flowing along the first flow path and in the second position, a majority of the exhaust gas flowing along the second flow path.

Exhaust system for an engine

A two-stroke engine assembly has a two-stroke internal combustion engine (ICE) and an exhaust system fluidly connected to the ICE. The exhaust system has a tuned pipe and at least one catalytic converter. A bypass valve is provided to selectively bypass the at least one catalytic converter. A method for controlling a two-stroke engine assembly controls the ICE to bring the temperature of exhaust gases within an operating temperature range of the catalytic converter. Another method for controlling a two-stroke engine assembly uses a lambda sensor to control the air-fuel ratio in cylinders of the ICE.

Two-stroke engine assembly having a catalytic converter and method for controlling same

A vehicle including an engine; a turbocharger, an intake air flow path of the vehicle defined from air entering the vehicle, passing through the compressor, and flowing into the engine air inlet; a coolant container assembly; a temperature sensor configured for determining a temperature in the intake air flow path; and a controller configured to selectively cause cooling liquid to flow from the coolant container into the intake air flow path. A method for managing engine air intake temperature or piston temperature of a turbocharged vehicle including: sensing a temperature of fluid within the air intake flow path, determining an estimated piston temperature; and in response to the estimated piston temperature and/or the temperature of the fluid being above threshold temperatures, causing an amount of cooling liquid to flow from a coolant container to the air intake flow path.

System and method for managing piston temperature in a vehicle

A snowmobile including a frame; at least one ski; an engine with an engine air inlet and an exhaust outlet; a turbocharger including an exhaust turbine, and a compressor. An air intake system includes a first flow path connecting the compressor to the atmosphere; a second flow path connecting the compressor to the engine air inlet; an intake bypass flow path connecting atmosphere to the engine air inlet for bypassing the compressor; and an intake bypass valve for controlling the flow through the intake bypass flow path. An exhaust system includes a third flow path connecting the exhaust outlet to the exhaust turbine; a fourth flow path connecting the exhaust turbine to the atmosphere; an exhaust bypass flow path connecting the exhaust outlet to the atmosphere for at least partially bypassing the exhaust turbine; and an exhaust bypass valve for controlling the flow through the exhaust bypass flow path.

Air intake and exhaust systems for a snowmobile engine

A rear suspension assembly for a snowmobile has a front suspension arm, a rear suspension arm, a pair of slide rails, at least one shock absorber, and at least one suspension coupler. The at least one suspension coupler couples the rear suspension arm with the front suspension arm. The at least one suspension coupler generates a coupling force to continuously couple the front and rear suspension arms with each other during a full range of movement between the fully extended position and the fully compressed position. A snowmobile having the rear suspension assembly is also disclosed.

Rear suspension assembly for a snowmobile

A suspension assembly for a snowmobile comprises first and second suspension arms pivotally connected to a chassis and to a rail, and extending forwardly and upwardly from the rail. A bracket arm is fixedly connected to the first suspension arm. A link is pivotally connected to the bracket arm. A first shock absorber is pivotally connected to the first suspension arm and to the rail. The lower end of the first shock absorber is disposed forwardly of the lower end of the first suspension arm. A second shock absorber is pivotally connected to the link and to second suspension arm. The lower end of the second shock absorber is disposed rearwardly of the lower end of the first shock absorber. A tie rod is pivotally connected to the link, and to the second suspension arm. A snowmobile having such suspension system is also disclosed.

Snowmobile suspension

A suspension system for a snowmobile has a rail for engagement with an endless drive track, and first and second suspension arms having upper ends adapted for pivotally connecting to the chassis and lower ends pivotally connected to the rail. The upper end the second suspension arm includes a shaft. A first shock absorber is operatively pivotally connected between the first suspension arm and the rail. A second shock absorber is operatively pivotally connected between the rail and the second suspension arm. Left and right brackets are connected to the shaft on either side of the second shock absorber. The shaft has a bent portion between the left and right brackets.

A suspension system for a snowmobile comprises first and second suspension arms pivotally connected to a chassis and to a rail, and extending forwardly and upwardly from the rail. A bracket arm is fixedly connected to the first suspension arm. A link is pivotally connected to the bracket arm. A first shock absorber is pivotally connected to the first suspension arm and to the rail. The lower end of the first shock absorber is disposed forwardly of the lower end of the first suspension arm. A second shock absorber is pivotally connected to the link and to second suspension arm. The lower end of the second shock absorber is disposed rearwardly of the lower end of the first shock absorber. A tie rod is pivotally connected to the link, and to the second suspension arm. A snowmobile having such suspension system is also disclosed.

A position-sensitive shock absorber is disclosed. The position-sensitive shock absorber includes a choking member positioned within the housing at a specific point along the stroke of the working piston that cooperates with the working piston to increase the resistance to fluid flow when the working piston reaches the specific point along its stroke thereby defining a second damping characteristic of the position-sensitive shock absorber from the specific point along the stroke of the working piston onward.

Position sensitive shock absorber

A suspension system for a snowmobile has a rail and first and second suspension arms having lower ends pivotally connected to the rail. A first shock absorber pivotally connected between the first suspension arm and the rail. A second shock absorber operatively pivotally connected between the first suspension arm and the rail. Left and right brackets are connected to the second suspension arm. Left and right tie rods have lower ends operatively pivotally connected to the first suspension arm and upper ends pivotally connected to their corresponding brackets about a first pivot axis. The second shock absorber is disposed laterally between the left and right tie rods. The suspension is movable between a first position where the first pivot axis intersects the second shock absorber and a second position where the first pivot axis is spaced from the second shock absorber.

Growing community of inventors

Sherbrooke, Canada

Sebastien Thibault