Bombardier Recreational Products Inc.

Bombardier Inc.

Gaetan Lecours

Michel Lefebvre

Sylvain Matte

Mathieu Gauthier

Max Richer

Jean-Sebastien Pard

Louis Lefebvre

Brian H Mastine

Duceppe Daniel

Remy Oddo

A snowmobile has a frame with an engine compartment and a tunnel, a front suspension, at least one ski, an engine, a bracket having a first portion joined to the engine and a second portion having an aperture defined therein, an output shaft, a countershaft passing through the aperture, a motion decoupler disposed around the countershaft and being supported by the second portion of the bracket, the countershaft being rotationally supported in the motion decoupler, a driving pulley disposed on the output shaft, a driven pulley disposed on the countershaft, a drive belt looped around the driving and driven pulleys, and an endless drive track. The driving pulley, the driven pulley and the drive belt together form a continuously variable transmission.

Continuously variable transmission mounting assembly

A snowmobile has a frame with an engine compartment and a tunnel, a front suspension, at least one ski, an engine, a bracket having a first portion joined to the engine and a second portion having an aperture defined therein, an output shaft, a countershaft passing through the aperture and being supported by the second portion of the bracket, a motion decoupler disposed in the aperture around the countershaft, the countershaft being rotationally supported in the motion decoupler, a driving pulley disposed on the output shaft, a driven pulley disposed on the countershaft, a drive belt looped around the driving and driven pulleys, and an endless drive track. The driving pulley, the driven pulley and the drive belt together form a continuously variable transmission.

A noise-reducing engine enclosure for an engine includes first and second members removably mounted to one another in cooperating relation to define an engine receiving space therebetween. The first and second members each include a noise-reducing layer of material to reduce noise transmission to the atmosphere outside of the engine enclosure during operation. The first and second members are movable between (1) an engine accessing position, wherein the first and second members are positioned to allow access to the engine during operation and (2) an engine enclosing position, wherein the first and second members cooperate to define the engine receiving space to receive and enclose the engine therein such that noise transmission to the atmosphere during operation is reduced.

Noise-reducing engine enclosure

A noise reducing system for a personal watercraft. The system includes a pump insulating system which insulates the pump housing from the hull. More particularly, the pump insulating system includes at least one insulating attachment for connecting a pump housing to a supporting surface of a personal watercraft. Such insulating attachment includes an insulator having a portion mounted between the pump housing and the supporting surface. Advantageously, the system also includes a resonator and a shield, both mounted on the exhaust system, and an insulating material mounted inside an air intake pipe.

Noise reducing system

The noise generated by a snowmobile track in operation can be reduced and attenuated by arranging for the track elements such as the drive lugs and ground-engaging lugs to have a degree of non-uniformity in their repeating pattern and thus to avoid the generation of peak noise levels at particular frequencies.

Track noise suppression

A variable ratio drive pulley designed for use in a belt drive transmission of a snowmobile includes fixed and movable flanges, the movable flange being controlled by centrifugally responsive thrust means employing pivoted weighted levers cooperating with shaped cam surfaces. The dynamic response of the pulley can be adjusted in a simple manner by abutment means supporting the ramps on which the cam surfaces are provided, these abutment means being accessible for adjustment from the exterior of the pulley.

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Valcourt, Canada

Gaetan Lecours