BODY LEANING CONTROL SYSTEM, AND A SADDLE RIDING TYPE VEHICLE HAVING THE SAME

• US 20100032914A1
• Filed: 07/29/2009
• Published: 02/11/2010
• Est. Priority Date: 08/08/2008
• Status: Active Grant

• Current Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Original Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Inventors: Hara, Nobuo, Oomura, Yasuhiro
• Granted Patent: US 8,020,878 B2
• Time in Patent Office: Days
• US Class Current: 280/5.509
• CPC Class Codes: B60G 13/08 hydraulic
• CPC Class Codes: B60G 21/026 transversally
• CPC Class Codes: B60G 21/05 between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
• CPC Class Codes: B60G 2200/13 with longitudinal arms only
• CPC Class Codes: B60G 2202/12 Wound spring
• CPC Class Codes: B60G 2202/24 Fluid damper
• CPC Class Codes: B60G 2300/124 Quads
• CPC Class Codes: B60G 2300/322 Snowmobiles
• CPC Class Codes: B60G 2300/45 Rolling frame vehicles
• CPC Class Codes: B60G 2400/0511 Roll angle
• CPC Class Codes: B60G 2400/104 lateral or transversal with regard to vehicle
• CPC Class Codes: B60G 2400/204 Vehicle speed
• CPC Class Codes: B60G 2800/012 Rolling condition
• CPC Class Codes: B62D 9/02 combined with means for inwardly inclining vehicle body on bends
• CPC Class Codes: B62J 45/4151 for sensing lateral inclination of the cycle
• CPC Class Codes: B62K 2005/001 Suspension details for cycles with three or more main road wheels
• CPC Class Codes: B62K 5/01 Motorcycles with four or more wheels specially adapted for disabled riders B62K5/003
• CPC Class Codes: B62K 5/08 with steering devices acting on two or more wheels
• CPC Class Codes: B62K 5/10 with means for inwardly inclining the vehicle body on bends

Abstract

A body leaning control system includes a support mechanism arranged to support at least a pair of traveling members that contact a traveling surface and are provided at opposite sides of the vehicle body to be movable up and down relative to the vehicle body, a resistance applying mechanism arranged to apply to the support mechanism a resistance to up-and-down motions of the pair of wheels, a lean information detecting device arranged to detect information on a lean amount of the vehicle body, and a controller arranged to perform control, based on detection results received from the lean information detecting device, to set the resistance of the resistance applying mechanism to a first resistance when the lean amount of the vehicle body is increasing, and to set the resistance of the resistance applying mechanism to a second resistance smaller than the first resistance when the lean amount of the vehicle body is decreasing.

Claims

1. A body leaning control system for a saddle riding type vehicle capable of making turns by leaning a vehicle body, the body leaning control system comprising:

a support mechanism arranged to support at least a pair of traveling members that contact a traveling surface and are provided at opposite sides of the vehicle body to be movable up and down relative to the vehicle body;

a resistance applying mechanism arranged to apply to the support mechanism a resistance to up-and-down motions of the pair of traveling members;

a lean information detecting device arranged to detect information on a lean amount of the vehicle body; and

a controller arranged to perform control, based on detection results received from the lean information detecting device, to set the resistance of the resistance applying mechanism to a first resistance when the lean amount of the vehicle body is increasing, and to set the resistance of the resistance applying mechanism to a second resistance smaller than the first resistance when the lean amount of the vehicle body is decreasing.

2. The system according to claim 1, wherein the second resistance has a substantially minimum value of the resistance of the resistance applying mechanism.

3. The system according to claim 1, wherein the lean amount of the vehicle body is a degree of an angle at which the vehicle body leans sideways relative to a substantially vertical direction.

4. The system according to claim 1, wherein:

a decrease in the lean amount of the vehicle body is a variation of the lean amount toward a neutral position where an up-and-down direction of the vehicle body is parallel or substantially parallel to a substantially vertical direction; and

an increase in the lean amount of the vehicle body is a variation of the lean amount away from the neutral position.

5. The system according to claim 1, wherein the controller is arranged to perform control, based on the detection results received from the lean information detecting device, to set the first resistance to include a region where the first resistance increases with the lean amount of the vehicle body.

6. The system according to claim 1, wherein the controller is arranged to set the resistance of the resistance applying mechanism to the first resistance when the lean amount of the vehicle body is increasing and is larger than a first angle, and to set the resistance of the resistance applying mechanism to a third resistance smaller than the first resistance when the lean amount of the vehicle body is increasing and is equal to or less than the first angle.

7. The system according to claim 6, wherein the third resistance has a substantially minimum value of the resistance of the resistance applying mechanism.

8. The system according to claim 1, wherein the controller is arranged to set the resistance of the resistance applying mechanism to the first resistance when the lean amount of the vehicle body is increasing and is equal to or less than a first angle.

9. The system according to claim 1, further comprising a vehicle speed detecting device arranged to detect a vehicle speed, wherein the controller is arranged to set a first angle based on a detection result received from the vehicle speed detecting device.

10. The system according to claim 9, wherein the controller is arranged to set the first angle to include a region where the first angle increases with the vehicle speed.

11. The system according to claim 1, further comprising a vehicle speed detecting device arranged to detect a vehicle speed, wherein the controller is arranged to perform control, based on detection results received from the vehicle speed detecting device, to set the first resistance to include a region where the first resistance decreases with an increase in the vehicle speed.

12. The system according to claim 1, wherein the controller is arranged to perform control, based on detection results received from the lean information detecting device, to set the first resistance to include a region where the first resistance increases with an angular speed of the lean amount which is a variation in the lean amount of the vehicle body.

13. The system according to claim 1, wherein the support mechanism includes:

a right side support mechanism arranged to vertically movably support a right traveling member of the pair of traveling members;

a left side support mechanism arranged to vertically movably support a left traveling member of the pair of traveling members; and

a balancer mechanism rotatably supported by the vehicle body and interlocked to the right side support mechanism and the left side support mechanism to allow the right traveling member and the left traveling member to move up and down in corresponding amounts in opposite directions; and

the resistance applying mechanism includes;

a damper body arranged to damp rotation of the balancer mechanism relative to the vehicle body; and

an adjusting element arranged to vary a damping force of the damper body;

wherein

the controller is arranged to control a level of resistance to the rotation of the balancer mechanism by driving the adjusting element.

14. The system according to claim 1, wherein the traveling members are wheels or skis.

15. A saddle riding type vehicle arranged to make turns by leaning a vehicle body, the saddle riding type vehicle comprising:

a body leaning control system including;

a support mechanism arranged to support at least a pair of traveling members that contact a traveling surface and are provided at opposite sides of the vehicle body to be movable up and down relative to the vehicle body;

a resistance applying mechanism arranged to apply to the support mechanism a resistance to up-and-down motions of the pair of traveling members;

a lean information detecting device arranged to detect information on a lean amount of the vehicle body; and

a controller arranged to perform control, based on detection results received from the lean information detecting device, to set the resistance of the resistance applying mechanism to a first resistance when the lean amount of the vehicle body is increasing, and to set the resistance of the resistance applying mechanism to a second resistance smaller than the first resistance when the lean amount of the vehicle body is decreasing.