VEHICLE WITH CONTACTLESS THROTTLE CONTROL

• US 20080114523A1
• Filed: 06/13/2007
• Published: 05/15/2008
• Est. Priority Date: 06/14/2006
• Status: Active Grant

• Current Assignee: GP Technology & Innovation Limited
• Original Assignee: Vectrix International Limited (Gold Peak Industries Limited)
• Inventors: Hughes, Peter S., Dugas, David, Bliss, Craig
• Granted Patent: US 7,762,231 B2
• Time in Patent Office: Days
• US Class Current: 701/101
• CPC Class Codes: B60L 2200/12 Bikes
• CPC Class Codes: B60L 7/16 for vehicles comprising converters between the power source and the motor
• CPC Class Codes: B62K 23/04 Twist grips
• CPC Class Codes: G01D 5/145 influenced by the relative movement between the Hall device and magnetic fields see G01R33/06

Abstract

A vehicle power control that includes a throttle mounting portion and a throttle that is movably mounted to the throttle mounting portion and configured for manipulation and operation by a rider. The power control also includes a sensor in contactless association with at least one of the throttle and throttle mounting portion. The sensor is configured for sensing a position of the throttle with respect to the mounting portion, in the contactless association, and generating a signal based on the sensed position for controlling motive power of a vehicle.

Claims

1. A vehicle power control, comprising:

a throttle mounting portion;

a throttle movably mounted to the throttle mounting portion and configured for manipulation and operation by a rider; and

a sensor in contactless association with at least one of the throttle and throttle mounting portion, the sensor configured for sensing a position of the throttle with respect to the mounting portion, in the contactless association, and generating a signal based on the sensed position for controlling motive power of a vehicle.

2. The power control of claim 1, wherein the sensor is configured for sensing an absolute position of the throttle without requiring movement of the throttle.

3. The power control of claim 1, further comprising a magnetic member having a magnetic field and associated with at least one of the throttle and the throttle mounting portion, wherein the sensor is configured to sense the magnetic field to sense the position of the throttle.

4. The power control of claim 3, wherein the sensor is configured for sensing the orientation of the magnetic field to sense the position of the throttle.

5. The power control of claim 3, wherein the magnetic member comprises a permanent magnet.

6. The power control of claim 3, wherein the magnetic member has magnetic poles disposed so that the magnetic field at the sensor changes orientation as the throttle is moved.

7. The power control of claim 6, wherein the throttle is rotatable about an axis, and the magnetic poles are disposed at different radial and circumferential locations with respect to the axis.

8. The power control of claim 7, wherein the sensor comprises a differential Hall effect sensor configured for sensing an absolute orientation of the magnetic field without requiring movement of the throttle.

9. The power control of claim 6, wherein the magnetic poles are disposed at different eccentric locations with respect to the axis.

10. The power control of claim 6, further comprising:

a support member supporting one of the magnetic member and sensor for moving said one with respect to the other to orient the magnetic field in a predetermined orientation when the throttle is in a predetermined position; and

a locking member configured for locking the support member in said predetermined position when such position is obtained to retain said orientation of the magnetic member with respect to the sensor with the throttle in said predetermined position for calibrating the sensor.

11. The power control of claim 10, further comprising a threaded member having threads and fixed to the throttle, wherein:

the support member is in threaded association with the threaded member and comprises first and second threaded portions that are flexible with respect to each other and that are in said threaded association; and

the locking member is configured for flexing the first and second flexible portions with respect to each other for gripping threads of the threaded member to rotationally lock the support member with respect to the throttle.

12. The power control of claim 11, wherein the locking member comprises a fastener.

13. The power control of claim 1, wherein the signal is a pulse-width modulated signal in which the pulse width is related to the sensed position.

14. The power control of claim 1, further comprising a throttle biasing assembly to resiliently bias the throttle towards a neutral position with respect to the sensor, the biasing assembly being configured for applying a lesser bias to the throttle toward the neutral position when the throttle is displaced from the neutral position on a first side thereof than when the throttle is displaced from the neutral position on a second side thereof.

15. The power control of claim 14, wherein rotation of the throttle from the neutral position in the first side demands acceleration, and rotation in the second side demands regenerative braking or reverse power.

16. The power control of claim 14, wherein the biasing assembly comprises:

a first biasing member configured to bias the throttle in a first direction from the first side toward the neutral; and

a second biasing member configured to bias the throttle in a second direction, opposite the first direction, to provide the greater bias when the throttle is on the second side than on the first side.

17. The power control of claim 14, wherein the biasing assembly is configured such that:

the first biasing member is in biasing association with the throttle when the throttle is on both the first and second sides; and

the second biasing member is in biasing association with the throttle when the throttle is on the second side and is disengaged from the throttle when the throttle is on the first side.

18. The power control of claim 1, wherein the sensor is mounted to the throttle mounting portion and is in the contactless association with the throttle.

19. A vehicle, comprising:

the vehicle power control of claim 1;

a motor configured for providing motive power to the vehicle; and

a controller connected to receive the signal from the sensor and to cause the motor to operate at a power level depending on the position of the throttle.

20. The vehicle of claim 19, further comprising handle bars configured for steering the vehicle, wherein the sensor is associated with the handle bars, and the throttle is a twist throttle mounted to the handle bars for operating the throttle and steering the handle bars.

21. A vehicle power control, comprising:

a throttle mounting portion;

a throttle movably mounted to the throttle mounting portion and configured for manipulation and operation by a rider;

a sensor in association with at least one of the throttle and throttle mounting portion, the sensor configured for sensing a position of the throttle with respect to the mounting portion, and generating a signal based on the sensed position for controlling motive power of a vehicle; and

a throttle biasing assembly to resiliently bias the throttle towards a neutral position with respect to the sensor, the biasing assembly being configured for applying a lesser bias to the throttle toward the neutral position when the throttle is displaced from the neutral position on a first side thereof than when the throttle is displaced from the neutral position on a second side thereof;

wherein the biasing assembly comprises;

a first biasing member configured to bias the throttle in a first direction from the first side toward the neutral; and

a second biasing member configured to bias the throttle in a second direction, opposite the first direction, to provide the greater bias when the throttle is on the second side than on the first side.