WO2016092564A4

WO2016092564A4 - Throttle position sensor

Info

Publication number: WO2016092564A4
Application number: PCT/IN2015/000449
Authority: WO
Inventors: Amol Ajitkumar RENKUNTALWAR; Kiran Shantaram PATIL; Ashok Kumar DAS
Original assignee: Varroc Engineering Pvt. Ltd.
Priority date: 2014-12-12
Filing date: 2015-12-11
Publication date: 2016-09-01
Also published as: WO2016092564A3; WO2016092564A2

Abstract

This invention embodies a single piece magnetic field sensor component part comprising a printed circuit and a Hall Effect IC (Integrated Circuit); the Hall Effect IC comprising two in-built separately programmable Hall Elements. This invention comprises an automobile component comprising above a single piece magnetic field sensor component part; comprising a throttle position sensor. The Hall Effect Sensors generate two independent analog output signals which are proportional to the magnitude of the relative positional change of magnetic flux density and these signals are conveyed to the ECU. One of the signals is a redundant signal This invention also comprises a mechanical means for reducing friction between two parts, at least one of the parts is moving against the other; wherein the mechanical means is not a ball bearing. The mechanical means comprises a friction ring of a wear resistant material.

Claims

AMENDED CLAIMS received by the International Bureau on 30 July 2016 (30.07.2016) Amended Claims :

1. A single piece magnetic field sensor component part comprising a printed circuit and a Hall Effect IC (Integrated Circuit) integrated in to a physically single piece..

2. The single piece magnetic field sensor component part of claim 1 wherein a Hall Effect IC is soldered directly on a Printed Circuit Board or integrated as one piece with the Printed Circuit Board without requirement of an Integrated Circuit (IC) holder between the Hall Effect IC and the Printed Circuit Board.

3. The single piece magnetic field sensor component part of claim 2, wherein the Hall Effect IC comprises two in-built separately programmable Hall Elements, the two Hall Elements being designated herein as Die A and Die B.

4. An automobile component comprising a single piece magnetic field sensor component part comprising a printed circuit and a Hall Effect IC (Integrated Circuit) integrated in to a physically single piece.

5. The automobile component of claim 4 wherein a Hall Effect IC is soldered directly on a Printed Circuit Board or integrated as one piece with the Printed Circuit Board without requirement of an Integrated Circuit (IC) holder between the Hall Effect IC and the Printed Circuit Board.

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6. The automobile component of claim 4, wherein the Hall Effect IC comprises two in-built separately programmable Hall Elements, the two Hall Elements being designated herein as Die A and Die B.

7. The automobile component of claim 4 for controlling the performance of the engine control unit (ECU) of the automobile via sensing the change in magnetic flux, generated by a relative positional change of a magnet due to rotation of a throttle of the automobile mounted on its handle bar, by the Hall Effect Sensors to generate two independent output electrical signals which are proportional to the magnitude of the relative positional change and are these signals are conveyed to the ECU.

8. The automobile component of claim 7 wherein the component consists of one or more components selected from the list consisting of a throttle grip comprising a throttle position sensor, clutch comprising a clutch position sensor, Clutch pedal position sensor and gear comprising a gear position sensor.

9. The automobile component of claim 8 consisting of the throttle position sensor comprising of following major sub-assemblies: a. upper case (6) complete with screws (7a) and (7b), b. rotor complete assembly comprising rotor (3) and magnet (4) fitted to a throttle pipe (1) and friction plate/ring (2) to make a throttle pipe assembly, c. lower case complete assembly [ comprising insert nuts (8a, 8b), locating pin (9) and lower case (10)], and d. single piece magnetic field sensor component part comprising a printed circuit (12) and a Hall Effect IC (Integrated Circuit) (11) integrated in to a physically single piece and a wiring harness (13), the Hall Effect IC consisting of two Hall elements being precisely located inside Hall Effect IC called as Die A (11a) and Die B (11b).

10. The automobile component of claim 9 wherein the: a. the rotor complete assembly comprises of rotor and NdFeB magnet, b. the friction plate/ring is assembled with throttle pipe, rotor complete assembly is engaged with throttle pipe through Oldham coupling mechanism, freely rotates inside throttle position sensor assembly and torsion spring assists to retain its initial position after the throttle pipe is released, the use of friction plate/ring ensures giving a smooth feeling of throttle pipe when it is manually rotated by vehicle rider, c. the single piece magnetic field sensor component part comprising a printed circuit and a Hall Effect IC (Integrated Circuit) integrated in to a physically single piece by being soldered to a wiring harness, and being further fitted in lower case by inserting it in pocket provided in lower case, covered with potting material and wiring harness fitted with cable tie, a specific gap relation is maintained between Hall Effect IC and magnet fitted in the Rotor, the throttle pipe assembly being finally enclosed inside lower case complete assembly and upper case, lower case complete and upper case are clamped with each other on handle bar by two screws, d. while one Die of Hall Effect IC is programmed to sense the magnetic flux value of magnet and gives a first output signal (OUT1) with respect to angular movement of throttle pipe from 0 degree to 85 degrees, which is master output to ECU, at the same time the other Die B of Hall Effect IC is programmed and is used for giving second output signal (OUT2) with respect to angular movement of throttle pipe from 0 degree to 85 degrees for redundancy purpose for serving as diagnostic signal to ECU, e. Hall Effect IC being programmed with 16 or 6 point calibration method, the throttle position sensor using single NdFeB magnet magnetized in such a way that it has neutral axis formation at the center of the magnet, and the two arching sides on the two sides of the center of the magnet have opposite polarities [North (N) and South (S)] on outer and inner portion/surface of the arc/arch in such a way that if on one side North pole is on the upper side and South pole is on the lower side, on the other side, South pole is on the upper side and north pole is on the lower side; as illustrated in Figure 7.

11. The automobile component of claim 10 consisting of the throttle position sensor wherein: a. the lower case complete assembly and an upper case assembly are stationary; b. the rotor complete assembly is assembled with throttle pipe and is mounted in throttle position sensor in such a way that it can be manually rotated from 0 to 85 degrees with respect to case fitted on handle bar, a permanent magnet is fitted into rotor cavity to generate respective predetermined angular distributions of magnetic flux density over the Hall Effect IC,

12. The automobile component of claim 11 wherein:

52 both Die A and Die B operating on independent +5V power supply with individual Ground connections; whereas the first output signal gives an Linear analog output signal (OUT1) of from 0.5V to 4.5V and whereas the second linear analog output signal (OUT2) gives an output of from 0.25V to 2.25V and vice versa when throttle pipe is rotated in counter-clockwise and clock-wise direction, these two independent analog outputs being achieved by programming both Die A and Die B inside of the Hall Effect IC through an external programming device (GUI Tool) which distinguishes first and second output characteristics by providing and filling adequate parameters in the GUI to each Die with respect to magnetic flux density sensed by each Die during angular movement of the magnet fitted in the rotor while rotating along with the throttle pipe, the Hall Effect IC being an tri axis position sensor which senses magnetic flux density of magnet in lengthwise (X), lateral (Y) and vertical (Z) direction of magnet, analog voltage outputs of each of the two Dies, Die A and Die B, linearity of the Throttle Position Sensor being maintained within ±2% linearity over its entire operating range,

53 c. the throttle position sensor construction is designed to fit within 27-30 mm range in addition to the length of throttle pipe, d. the response time of the throttle position sensor in CCW direction when throttle pipe is fully rotated to 85 degree is 36 milliseconds or less. The Hall Effect IC gives less response time in clock wise direction, i.e. the movement of throttle pipe from 85 degrees to 0 degrees position. The output response time of Hall Effect IC of is 36 milliseconds, e. output from Die A is 0.5 volts at 0 degree rotation to 4.5 volts at 85 degree rotation of the throttle pipe. And Output from Die B is 0.25 volts at 0 degree rotation to 2.25 volts at 85 degree rotation of the throttle pipe which is exactly half of the output from Die A. The co-relation between two redundant outputs from Die A and Die B is accurately maintained, f. the collective dimensional variation of throttle pipe, rotor, magnet, single piece magnetic field sensor component part comprising a printed circuit and a Hall Effect IC (Integrated Circuit) integrated in to a physically single piece being not more than ±0.40 mm, the magnet width is 1 mm more than Hall Effect IC,

54 the magnet used in the throttle position sensor have following properties: material : NdFeB. Arc type, grade : N35, magnetic flux Density - with Gauss Value : 1500 +/- 500 gauss, magnetized in such a way that it has neutral axis formation at the center of the magnet, and the two arching sides on the two sides of the center of the magnet have opposite polarities [North (N) and South (S)] on outer and inner portion/surface of the arc/arch in such a way that if on one side North pole is on the upper side and South pole is on the lower side, on the other side, South pole is on the upper side and north pole is on the lower side; as illustrated in Figure 7, g. the dimensions of parts of throttle position sensor being maintained in a range of ±0.10 mm.

13. The automobile component of claim 4 wherein: a. the component is a throttle position sensor, and b. the automobile is a two wheeler or. a three wheeler.

14. A mechanical means for reducing friction between two parts, at least one of the parts is moving against the other; wherein the mechanical means is not a ball bearing.

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15. The mechanical means of claim 14 comprising a ring of a wear resistant material that provides a line contact to the stationary part/s.

16. The mechanical means of claim 15 wherein the ring comprises a "V" shape in a cross section having a first arm that comes in contact with the stationary part/s and a second arm, wherein both the arms of the "V" are at 90° angle to each other and the surface of first arm of "V" is provided with a projecting curvature made in such a way that when it comes in the contact with the stationary part/s, the contact is established along the line of circumference provided by the projecting curvature, thereby reducing the abrasion/friction.

17. The mechanical means of claim 15 wherein the wear resistant material is polyacetal.

18. The mechanical means of claim 14 wherein the at least one moving part is the friction ring and the stationary parts comprises lower case and upper case of a position sensor of an automobile.

19. The mechanical means of claim 18 wherein the position sensor of an automobile is a throttle position sensor and the automobile is a two wheeler or a three wheeler.

20. The mechanical means of claim 19 wherein the throttle position sensor comprising of following major sub-assemblies:

56 a. upper case (6) complete with screws (7a) and (7b), b. rotor complete assembly comprising rotor (3) and magnet (4) fitted to a throttle pipe (1) and friction plate/ring (2) to make a throttle pipe assembly, c. lower case complete assembly [ comprising insert nuts (8a, 8b), locating pin (9) and lower case (10)], and d. single piece magnetic field sensor component part comprising a printed circuit (12) and a Hall Effect IC (Integrated Circuit) (11) integrated in to a physically single piece and a wiring harness (13), the Hall Effect IC consisting of two Hall elements being precisely located inside Hall Effect IC called as Die A (11 a) and Die B (11 b).

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STATEMENT UNDER ARTICLE 19(1) (RULE 46.4)

The applicant respectfully submits his response to Box no. V in the Written Opinion of the International Searching Authority.

Claims 1 , 4, 9, 10, 12 and 20 are amended to add after the phrase "a printed circuit and a Hall Effect IC (Integrated Circuit)" the phrase "integrated in to a physically single piece".

This amendment is supported by lines 11-13 on page 20 of the "as filed" application. Hence, there is addition of no new matter and Applicant submits that the amendments are allowable.

Claim 12, sub-claim a. is amended in line 15 to add the word "tri". This amendment is supported by the lines 3 and 4 of page 31 of the "as filed" application. Hence/there is addition of no new matter and Applicant submits that the amendments are allowable.

No new matter is added by above corrections, hence these are allowable amendments.

There may be a need to amend the description.

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