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Stroke sensor

By arranging multiple sensor coils and conductors on the manual valve of the automatic transmission, combined with shields and sealing structures, the problem of false detection and wear caused by sensor failure is solved, and high-precision and reliable transmission range detection is achieved.

Inactive Publication Date: 2012-04-18
PANASONIC HOLDINGS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the wrong gear range may be falsely detected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0041] refer to Figure 1-4 B, the travel change sensor 1 of this embodiment includes a fixed block 10 fixed at a specific position of the motor vehicle (not shown) and a manual valve 80 (see Figure 5 A-5C) Movable mass 40 moving together. The stroke change sensor 1 detects the position of the manual valve 80 (that is, the shifting range) by detecting the position of the detected body 50 provided in the movable block 40 using detection units 61-64 provided in the fixed block 10 (hereinafter, if there is no need to distinguish them, the detection units 61-64 will be referred to as "detection unit 60"). Although in the following description the term "vertical direction" will be based on figure 2 The direction shown in B, but this is not intended to limit the installation direction of the stroke change sensor 1.

[0042] The fixing block 10 is made of synthetic resin and includes a box-shaped casing 11 having a reduced thickness in the vertical direction and a substrate bloc...

no. 2 example

[0076] The stroke change sensor 1 of the present embodiment is different from the stroke change sensor 1 of the first embodiment in the configuration for combining the body 14 and the cover 15 .

[0077] In other words, the stroke change sensor 1 is generally installed and used in AT (in oil), whereby high airtightness is required in the housing 11 for accommodating the substrate block 12 . In the structure of the first embodiment, the body 14 and the cover 15 constituting the housing 11 are combined by laser welding to ensure increased bonding strength and airtightness. In this embodiment, increased airtightness is achieved by employing the following structure combining the body 14 and the cover 14 .

[0078] refer to Figure 7 A to 7C, the body 14 includes a stepped portion 30 formed in the lower surface around the opening 13 in such a manner that the entire periphery of the opening 13 is recessed. The cover 15 has the same outer edge shape as that of the stepped portion 3...

no. 3 example

[0087] The difference between the stroke change sensor 1 of this embodiment and the stroke change sensor 1 of the second embodiment is that, as Figure 9 As shown, a fixing plate 90 made of synthetic resin and an elastic body 91 made of synthetic rubber as an O-ring are additionally provided to fix the detection unit 60 inside the housing 11 .

[0088] The fixing plate 90 is formed in a rectangular plate shape extending in the Y direction. The fixing plate 90 has a through hole 92 formed at a position corresponding to the positioning protrusion 27 and an insertion hole 93 formed between each pair of through holes 92 arranged in the X direction. The receptacle 93 conforms to the coil spool 70 in shape. On the inner bottom surface of the opening 13 of the main body 14 and around the positioning protrusion 27 , a cutout portion 94 is formed in conformity with the connecting piece 72 of the coil reel 70 . In this embodiment, the positioning protrusion 27 and the connecting piece...

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PUM

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Abstract

Disclosed is a stroke sensor that prevents the detection of erroneous shift ranges even when a sensor coil is broken. Conductor tabs (51-57) of a inspected body (50) are arranged in a prescribed two-dimensional pattern on the lower surface of a slider (41). Specifically, the lower surface of the slider (41) is divided in the Y direction into four areas corresponding to four inspection units (61-64), and in each area, the conductor tabs (51-57) are arranged in prescribed ranges in the X direction. Here, the arrangement of the conductor tabs (51-57) is such that the combination of the conductor tabs (51-57) detected by the inspection unit (60) in the X direction is different in each shift range.; Thus, each time the shift range is shifted, the combination of the inspection units (61-64) detecting the conductor tabs (51-57) changes, and the shift range can be identified by the combination of the inspection units (61-64) in a detecting state.

Description

technical field [0001] The present invention relates to a stroke change sensor for detecting a position of a manual valve that changes in association with a shift range of an automatic transmission. Background technique [0002] As a sensor used in detecting the shift range of an automatic transmission for automobiles (hereinafter abbreviated as "AT"), there is conventionally known a stroke change sensor which detects the shift range by detecting the position of a manual valve of the AT. The manual valve has a function of switching the oil passage associated with the AT shift range inside (in oil) or outside of the AT. [0003] As such a stroke change sensor, there is known a contact type stroke change sensor in which the contact state of each mechanical contact point changes with the linear reciprocating motion of a manual valve. In this contact travel change sensor, the mechanical contact point usually wears due to its sliding movement. [0004] In view of this, a non-co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/00G01B7/00
CPCF16H59/105G01B7/003F16H2061/1208G01B7/02F16H2061/1284
Owner PANASONIC HOLDINGS CORP