ALL-TERRAIN VEHICLE (ATV) PROPELLABLE ON WHEELS OR ENDLESS TRACKS

• US 20110315459A1
• Filed: 06/28/2011
• Published: 12/29/2011
• Est. Priority Date: 06/28/2010
• Status: Active Grant

• Current Assignee: Camso Inc. (Compagnie Generale DES Etablissements Michelin SCA)
• Original Assignee: Camso Inc. (Compagnie Generale DES Etablissements Michelin SCA)
• Inventors: Zuchoski, Jeremie, Bernard, Jean
• Granted Patent: US 9,656,703 B2
• Time in Patent Office: Days
• US Class Current: 180/9.21
• CPC Class Codes: B60W 2050/0095 Automatic control mode change
• CPC Class Codes: B60W 2300/18 Four-wheel drive vehicles
• CPC Class Codes: B60W 2300/185 Off-road vehicles
• CPC Class Codes: B60W 2300/362 Buggies; Quads
• CPC Class Codes: B60W 2300/44 Tracked vehicles
• CPC Class Codes: B60W 50/082 Selecting or switching between different modes of propelling
• CPC Class Codes: B60Y 2200/124 Buggies, Quads
• CPC Class Codes: B60Y 2200/25 Track vehicles
• CPC Class Codes: B62D 55/02 with tracks and additional ground wheels for multi-purpose tractors B62D49/0635
• CPC Class Codes: B62D 55/04 with tracks and alternative ground wheels, e.g. changeable from endless track vehicle into wheeled vehicle and vice versa for multi-purpose tractors B62D49/0635

Abstract

An all-terrain vehicle (ATV) equippable with a plurality of ground-engaging wheels or a plurality of ground-engaging track assemblies providing traction on the ground. The ATV is designed to facilitate its use whether it is equipped with the ground-engaging wheels or the ground-engaging track assemblies. A powertrain, a steering system, a suspension, a braking system, a body, and/or other components of the ATV have features which take into account that the ATV can be equipped with either the ground-engaging wheels or the ground-engaging track assemblies.

Claims

1. An all-terrain vehicle (ATV), the ATV being equippable with a plurality of ground-engaging wheels or a plurality of ground-engaging track assemblies providing traction on the ground, each ground-engaging track assembly of the plurality of ground-engaging track assemblies comprising:

a plurality of track-contacting wheels; and

an endless track disposed around the plurality of track-contacting wheels, the plurality of track-contacting wheels including a drive wheel for driving the endless track, the endless track comprising an inner side for facing the plurality of track-contacting wheels and a ground-engaging outer side for engaging the ground, the ATV comprising;

a powertrain for delivering power to the ground-engaging wheels when the ATV is equipped with the ground-engaging wheels and to the drive wheels of the ground-engaging track assemblies when the ATV is equipped with the ground-engaging track assemblies, the powertrain being operable in a wheel mode when the ATV is equipped with the ground-engaging wheels and in a track mode when the ATV is equipped with the ground-engaging track assemblies; and

a mode selector for selecting a particular one of the wheel mode and the track mode to cause the powertrain to operate in the particular one of the wheel mode and the track mode.

2. The ATV claimed in claim 1, wherein the powertrain comprises a prime mover for generating power, the prime mover operating differently in the track mode than in the wheel mode.

3. The ATV claimed in claim 2, wherein the powertrain is configured to control a power output of the prime mover differently in the track mode than in the wheel mode.

4. The ATV claimed in claim 2, comprising an accelerator for use by a user of the ATV, a response of the prime mover to input of the user at the accelerator being different in the track mode than in the wheel mode.

5. The ATV claimed in claim 2, wherein at least one of (i) an idle speed of the prime mover and (ii) a maximum speed of the prime mover is different in the track mode than in the wheel mode.

6. The ATV claimed in claim 2, wherein a torque curve or power curve of the prime mover is different in the track mode than in the wheel mode.

7. The ATV claimed in claim 2, wherein an operational region of a torque curve or power curve of the prime mover is different in the track mode than in the wheel mode.

8. The ATV claimed in claim 7, wherein the operational region of the torque curve or power curve of the prime mover in the track mode includes a lower range of speeds than the operational region of the torque curve or power curve of the prime mover in the wheel mode.

9. The ATV claimed in claim 2, wherein the powertrain is configured to control a temperature of the prime mover differently in the track mode than in the wheel mode.

10. The ATV claimed in claim 2, wherein an operational temperature range of the prime mover is different in the track mode than in the wheel mode.

11. The ATV claimed in claim 2, comprising a cooling system for cooling the prime mover, a rate of cooling of the prime mover by the cooling system being different in the track mode than in the wheel mode.

12. The ATV claimed in claim 2, wherein a warm-up process of the prime mover is different in the track mode than in the wheel mode.

13. The ATV claimed in claim 1, wherein the powertrain comprises a prime mover for generating power and a transmission for transmitting power, the transmission operating differently in the track mode than in the wheel mode.

14. The ATV claimed in claim 13, wherein the powertrain controls a transmission state of the transmission differently in the track mode than in the wheel mode.

15. The ATV claimed in claim 13, wherein a shifting scheme of the transmission is different in the track mode than in the wheel mode.

16. The ATV claimed in claim 13, wherein, for a given speed of the prime mover, a transmission ratio of the transmission is different in the track mode than in the wheel mode such that there is more torque at an output of the transmission in the track mode than in the wheel mode.

17. The ATV claimed in claim 13, wherein a set of available transmission states of the transmission is different in the track mode than in the wheel mode.

18. The ATV claimed in claim 17, wherein the set of available transmission states of the transmission in the track mode includes a transmission ratio that is lower than any transmission ratio of the set of available transmission states of the transmission in the wheel mode.

19. The ATV claimed in claim 13, wherein the transmission has at least one of (i) a transmission ratio dedicated to the wheel mode and (ii) a transmission ratio dedicated to the track mode.

20. The ATV claimed in claim 13, wherein the transmission has a greater number of transmission ratios in a reverse direction of the transmission in the track mode than in the wheel mode.

21. The ATV claimed in claim 1, wherein the powertrain comprises a traction control system, the traction control system operating differently in the track mode than in the wheel mode.

22. The ATV claimed in claim 1, wherein the powertrain is configured to control differently the power delivered to the drive wheels of the ground-engaging track assemblies in the track mode than the power delivered to the ground-engaging wheels in the wheel mode.

23. The ATV claimed in claim 1, wherein the powertrain is configured to apply more torque to the drive wheels of the ground-engaging track assemblies in the track mode than to the ground-engaging wheels in the wheel mode.

24. The ATV claimed in claim 1, wherein the powertrain comprises a powertrain controller for controlling the powertrain, the mode selector providing an indication of the particular one of the wheel mode and the track mode to the powertrain controller.

25. The ATV claimed in claim 1, comprising a user interface for use by a user of the ATV, the mode selector comprising a mode selection control implemented by the user interface, the mode selection control allowing the user to select the particular one of the wheel mode and the track mode.

26. The ATV claimed in claim 25, wherein the mode selection control comprises at least one of a button, a switch, a knob, and a lever.

27. The ATV claimed in claim 1, wherein the mode selector comprises a sensor for sensing whether the ATV is equipped with the ground-engaging wheels or the ground-engaging track assemblies.

28. The ATV claimed in claim 27, wherein the sensor is a contact sensor for sensing whether the ATV is equipped with the ground-engaging wheels or the ground-engaging track assemblies based on physical contact with the contact sensor.

29. The ATV claimed in claim 27, wherein the sensor is a contactless sensor for sensing whether the ATV is equipped with the ground-engaging wheels or the ground-engaging track assemblies without physical contact with the contactless sensor.

30. The ATV claimed in claim 29, wherein the contactless sensor includes at least one of an optical sensor, an acoustic sensor, and a magnetic sensor.

31. The ATV claimed in claim 1, wherein the mode selector comprises a mode controller configured to select the particular one of the wheel mode and the track mode based on input from the powertrain.

32. The ATV claimed in claim 1, comprising a user interface for use by a user of the ATV, the user interface comprising a mode indicator indicating the particular one of the wheel mode and the track mode to the user.

33. A controller for an all-terrain vehicle (ATV), the ATV being equippable with a plurality of ground-engaging wheels or a plurality of ground-engaging track assemblies providing traction on the ground, each ground-engaging track assembly of the plurality of ground-engaging track assemblies comprising:

a plurality of track-contacting wheels; and

an endless track disposed around the plurality of track-contacting wheels, the plurality of track-contacting wheels including a drive wheel for driving the endless track, the endless track comprising an inner side for facing the plurality of track-contacting wheels and a ground-engaging outer side for engaging the ground, the ATV comprising a powertrain for delivering power to the ground-engaging wheels when the ATV is equipped with the ground-engaging wheels and to the drive wheels of the ground-engaging track assemblies when the ATV is equipped with the ground-engaging track assemblies, the controller comprising;

a processing portion; and

a memory portion storing a program executable by the processing portion to control the powertrain such that the powertrain operates in a wheel mode when the ATV is equipped with the ground-engaging wheels and in a track mode when the ATV is equipped with the ground-engaging track assemblies.

34. Computer-readable storage media storing a program executable by at least one processor to implement a controller for an all-terrain vehicle (ATV), the ATV being equippable with a plurality of ground-engaging wheels or a plurality of ground-engaging track assemblies providing traction on the ground, each ground-engaging track assembly of the plurality of ground-engaging track assemblies comprising:

a plurality of track-contacting wheels; and

an endless track disposed around the plurality of track-contacting wheels, the plurality of track-contacting wheels including a drive wheel for driving the endless track, the endless track comprising an inner side for facing the plurality of track-contacting wheels and a ground-engaging outer side for engaging the ground, the ATV comprising a powertrain for delivering power to the ground-engaging wheels when the ATV is equipped with the ground-engaging wheels and to the drive wheels of the ground-engaging track assemblies when the ATV is equipped with the ground-engaging track assemblies, the program when executed by the at least one processor causing the controller to control the powertrain such that the powertrain operates in a wheel mode when the ATV is equipped with the ground-engaging wheels and in a track mode when the ATV is equipped with the ground-engaging track assemblies.

35. An all-terrain vehicle (ATV), the ATV being equippable with a plurality of ground-engaging wheels or a plurality of ground-engaging track assemblies providing traction on the ground, each ground-engaging track assembly of the plurality of ground-engaging track assemblies comprising:

a plurality of track-contacting wheels; and

an endless track disposed around the plurality of track-contacting wheels, the plurality of track-contacting wheels including a drive wheel for driving the endless track, the endless track comprising an inner side for facing the plurality of track-contacting wheels and a ground-engaging outer side for engaging the ground, the ATV comprising;

a frame;

a powertrain for delivering power to the ground-engaging wheels when the ATV is equipped with the ground-engaging wheels and to the drive wheels of the ground-engaging track assemblies when the ATV is equipped with the ground-engaging track assemblies;

a steering system for steering the ATV on the ground;

a suspension for allowing relative motion between the frame and the ground-engaging wheels when the ATV is equipped with the ground-engaging wheels and relative motion between the frame and the ground-engaging track assemblies when the ATV is equipped with the ground-engaging track assemblies; and

a braking system for braking the ATV;

at least one of the powertrain, the steering system, the suspension, and the braking system being operable in a wheel mode when the ATV is equipped with the ground-engaging wheels and in a track mode when the ATV is equipped with the ground-engaging track assemblies, the ATV comprising a mode selector for selecting a particular one of the wheel mode and the track mode to cause the at least one of the powertrain, the steering system, the suspension, and the braking system to operate in the particular one of the wheel mode and the track mode.