THROTTLE CONTROL INTEGRATING AN ANGULAR POSITION SENSOR

• US 20100132500A1
• Filed: 11/28/2009
• Published: 06/03/2010
• Est. Priority Date: 12/01/2008
• Status: Abandoned Application

• Current Assignee: Magneti Marelli S.p.A.
• Original Assignee: Magneti Marelli S.p.A.
• Inventors: Baldassari, Andrea, Piciotti, Roberto, Cominetti, Paolo
• Application Number:
  US12/626,889
• Publication Number:
  US 20100132500A1
• Time in Patent Office: Days
• US Class Current: 74/504
• CPC Class Codes: B62K 23/04 Twist grips
• CPC Class Codes: F02D 11/106 Detection of demand or actuation
• CPC Class Codes: F02D 2400/08 Redundant elements, e.g. two sensors for measuring the same parameter
• CPC Class Codes: Y10T 74/20474 Rotatable rod, shaft, or post

Abstract

A throttle control provided with: a twist grip, which has a tubular shape and is centrally perforated to be fitted about a tubular handlebar so as to rotate with respect to the tubular handlebar; and an angular position sensor, which is adapted to read the angular position of the twist grip and has at least one rotor, which is supported by the twist grip to rotate along with the twist grip and is adapted to affect an electric and/or magnetic field, and at least a reader, which is adapted to be mounted in a fixed position inside the tubular handlebar so as to be arranged close to the rotor, and is adapted to remotely and contactlessly read the orientation of the rotor.

Claims

1. A throttle control (1) integrating an angular position sensor (16);

the throttle control (1) comprises;

a twist grip (11), which has a tubular shape and is centrally perforated to be fitted about a tubular handlebar (2) so as to rotate with respect to the tubular handlebar (2); and

an angular position sensor (16), which is adapted to read the angular position of the twist grip (11);

the throttle control (1) is characterized in that the angular position sensor (16) comprises;

at least one rotor (17), which is supported by the twist grip (11) to rotate along with the twist grip (11) and is adapted to affect an electric and/or magnetic field; and

at least one reader (18), which is adapted to be mounted in a fixed position inside the tubular handlebar (2) so as to be arranged close to the rotor (17), and is adapted to remotely and contactlessly read the orientation of the rotor (17).

2. A throttle control (1) according to claim 1, wherein the twist grip (11) comprises a cylindrical side wall (25) arranged about the tubular handlebar (2) and a circular end wall (26), which is arranged outside the tubular handlebar (2) to close one end of the tubular handlebar (2);

the rotor (17) is carried by the circular end wall (26) of the twist grip (11).

3. A throttle control (1) according to claim 2, wherein at the circular end wall (26), the twist grip (11) has a seat (31) which accommodates the rotor (17) and is closed by a lid (32).

4. A throttle control (1) according to claim 1, wherein the twist grip (11) comprises a cylindrical side wall (25) arranged about the tubular handlebar (2) and a circular end wall (26), which is arranged outside the tubular handlebar (2) to close one end of the tubular handlebar (2);

the rotor (17) is carried by the cylindrical side wall (25) of the twist grip (11).

5. A twist grip (1) according to claim 4, wherein the tubular handlebar (2) is made of non-magnetic metal.

6. A twist grip (1) according to claim 4, wherein the tubular handlebar (2) comprises a through window obtained at the rotor (17).

7. A throttle control (1) according to claim 1, wherein the reader (18) of the angular position sensor (16) comprises at least two electronic querying devices (20), which are reciprocally independent and are adapted to read the orientation of the rotor (17) to provide at least two reciprocally redundant measurements.

8. A throttle control (1) according to claim 7, wherein the reader (18) of the angular position sensor (16) comprises a common printed circuit (21) arranged in a fixed position and supporting the at least two electronic querying devices (20) which are fixed to both the surfaces of the printed circuit (21), so that an electronic querying device (20) is fixed to a first surface of the printed circuit (21) and the other electronic querying device (20) is fixed to a second surface of the printed circuit (21).

9. A throttle control (1) according to claim 8, wherein the reader (18) of the angular position sensor (16) comprises three electronic querying devices (20), which are reciprocally independent, are adapted to read the orientation of the rotor (17) to provide at least two reciprocally redundant measurements and are fixed to both the surfaces of the printed circuit (21), so that the two electronic querying devices (20) are fixed to a first surface of the printed circuit (21) and the remaining electronic querying device (20) is fixed to a second surface of the printed circuit (21).

10. A throttle control (1) according to claim 9, wherein the rotor (17) of the angular position sensor (16) comprises two electromagnetic elements (22;

23), the orientation of which is read by the three electronic querying devices (20).

11. A throttle control (1) according to claim 7, wherein the rotor (17) of the angular position sensor (16) comprises a single electromagnetic element (22;

23), the orientation of which is read by the electronic querying devices (20).

12. A throttle control (1) according to claim 7, wherein the rotor (17) of the angular position sensor (16) comprises at least two electromagnetic elements (22;

23), each of which is associated with a corresponding electronic querying device (20).

13. A throttle control (1) according to claim 1, wherein the rotor (17) comprises at least one permanent magnet (22).

14. A throttle control (1) according to claim 1, wherein the angular position sensor (16) comprises a first supporting body (27), which has a cylindrical shape, is adapted to be inserted and fixed into the tubular handlebar (2) and accommodates the reader (18).

15. A throttle control (1) according to claim 14, wherein the first supporting body (27) comprises a coupling element which determines a univocal, predetermined angular position of the first supporting body (27) inside the tubular handlebar (2).

16. A throttle control (1) according to claim 15, wherein the coupling element comprises at least one pin (29) which radially rises from the first supporting body (27) and is adapted to engage a corresponding seat (30) obtained in the tubular handlebar (2).

17. A throttle control (1) according to claim 1, wherein the twist grip (11) is made of plastic material by molding and the rotor (17) is co-molded to the twist grip (11) in order to be integrated into the twist grip (11).

18. A throttle control (1) according to claim 1 and comprising:

a supporting body (3), which is provided with a central through hole and is adapted to be fitted about the handlebar (2) to be rigidly fixed to the handlebar (2); and

at least one elastic returning element (13), which is arranged inside the supporting body (3) and has a first end (15) coupled to the twist grip (11) and a second end (16) secured to the supporting body (3) to exert an elastic bias on the twist grip (11) which tends to rotate the twist grip (11) towards a rest position corresponding to zero driving torque.