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neutral position sensor

A sensor and neutral technology, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as the inability to guarantee the consistency of signal switching angles, errors in air gap distances, etc., and reduce manufacturing costs. The requirements of installation accuracy and the effect of ensuring consistency

Active Publication Date: 2016-01-20
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For a conventional neutral position sensor, when the air gap distance L between the Hall device 11 and the magnet 12 changes, the signal switching angle between neutral and in gear will change accordingly. When the neutral position sensor is installed on different vehicles, due to There will inevitably be errors in the air gap distance between the Hall device and the magnet, resulting in different signal switching angles between neutral and in gear on different vehicles, and the neutral and in gear signal switching angles of the neutral position sensor on different vehicles cannot be guaranteed. Consistency of signal switching angle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] neutral position sensor figure 2 , image 3 As shown, it includes a magnet 11 and a Hall device 12;

[0018] The magnet 11 is installed on the gear shift shaft 10 along the circumferential direction. The polarity toward the end of the shift shaft 10 is opposite. The polarity of the middle part facing away from the shift shaft end can be S pole, and the polarity of both ends facing away from the shift shaft end can be N pole, or the middle part can face away from the shift shaft. The polarity of the shaft end is N pole, and the polarity of the two ends facing away from the shift shaft end is S pole.

[0019] The Hall device 12 is used to output electrical signals according to the strength and direction of the passing magnetic field. The Hall device 12 is installed on the side of the magnet 11 away from the shift shaft 10 and kept constant with the magnet 11. When the shift shaft 10 is in the neutral position, the Hall device 12 is located directly above the middle pa...

Embodiment 2

[0021] The magnet 11 includes three permanent magnets, and the three permanent magnets are adjacently installed on the shift shaft along the circumferential direction of the shift shaft. The polarity of the end of the block permanent magnet facing away from the shift shaft is reversed.

[0022] The Hall device 12 is installed on the side of the magnet 11 away from the shift shaft 10 and maintains a certain air gap distance from the magnet 11. When the shift shaft is in the neutral position, the Hall device 12 It is directly above a permanent magnet installed in the middle position on the shift shaft 10 .

Embodiment 3

[0024] The magnet 11 is an arc-shaped permanent magnet, and the arc-shaped permanent magnet is installed on the shift shaft along the circumferential direction, so that the arc-shaped permanent magnet can rotate around the axis of the shift shaft. The shift shaft is divided into three parts in the circumferential direction, and the polarity of the middle part is opposite to that of the two ends.

[0025] The Hall device 12 is installed on the side of the arc-shaped magnet away from the shift shaft 10 and maintains a certain air gap distance from the arc-shaped magnet. When the shift shaft is in the neutral position, the Hall The device 12 is located directly above the middle part of said arc-shaped magnet 11 mounted on the shift shaft 10 .

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Abstract

The invention discloses a neutral position sensor which comprises a magnetic body and a Hall device, wherein the magnetic body is circumferentially installed on a gear shift shaft, the polarity of the magnetic body in the middle part opposite to the gear shift shaft end along the gear shift shaft circumference is different from the polarities of the two end parts opposite to the gear shift shaft end along the gear shift shaft circumference; the Hall device is used for outputting electricity signals according to the intensity and direction of the penetrated magnetic field; the Hall device is installed on one side of the magnetic body far away from the gear shift shaft and keeps a certain air gap with the magnetic body; and when the gear shift shaft is at the neutral position, the Hall device is positioned right above the middle part of the magnetic body on the gear shift shaft along the gear shift shaft circumference. The neutral position sensor provided by the invention can determine the neutral position state, the shifting state and the transition state between the neutral position state and the shifting state of a motor vehicle transmission; and the requirement of manufacturing and mounting accuracy is lowered.

Description

technical field [0001] The present application relates to a motor vehicle transmission, in particular to a neutral position sensor. Background technique [0002] The neutral position sensor is used to detect whether the car is in neutral or in gear. Conventional neutral position sensors such as figure 1 As shown, it includes a magnet 11 and a Hall device 12. The magnet 11 is installed on the shift shaft 10. One pole (N pole or S pole) of the magnet 11 faces the shift shaft, and the other pole (S pole or N pole) faces away from the shift shaft 10, and the Hall device 12 is installed on the side of the magnet away from the shift shaft 10. When in neutral, the top of the magnet 11 installed on the shift shaft 10 is facing The Hall device 12. [0003] Conventional neutral position sensor, only when the motor vehicle transmission is in neutral, the Hall device 12 can detect the magnetic field and output the neutral signal; when the motor vehicle transmission is in gear, the ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H63/42
Inventor 孙广建吕存养程捷朱银
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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