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Throttle sensor

a technology of throbbing sensor and rotary shaft, which is applied in the direction of resistor housing/enclosement/embedding, instruments, machines/engines, etc., can solve the problems of large size and high cos

Inactive Publication Date: 2007-07-24
HITACHI LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004]An object of the present invention is to provide a throttle sensor of small size in which a sensor element does not have a bearing potion and a joint.
[0007]With the throttle sensor of the present invention, the brushes are mounted on the throttle valve spindle through the holder. Therefore, the sensor element can do away with bearings for receiving the throttle valve spindle and the joint, and the number of components is reduced, thereby to simplify the structure of the sensor element of the throttle sensor.

Problems solved by technology

Therefore, the structure of the sensor element has become complicated causing such problems as a large size and a high cost.

Method used

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Examples

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Embodiment Construction

[0015]Referring to FIG. 1, numeral 1 designates a throttle body, and a throttle valve 2 is fixed to a throttle valve spindle 3 by screws 4 for fixation. In addition, the throttle valve spindle 3 is rotated in accordance with the tread of an accelerator pedal (not shown), and it is mounted on the throttle body 1 through bearings 5. Numeral 6 designates a holder which is made of a resin or the like, and which is fixed to one end of the throttle valve spindle 3 by press fitting or the like. Numeral 7 indicates a brush which is joined to the holder 6. The brushes 7 slide on resistors 9 shown in FIG. 3 which are arranged on a ceramics circuit board 8 and which are made of electrically conductive plastics, with the rotation of the throttle valve spindle 3. On this occasion, assuming that the side of the throttle body 1 as viewed from the holder 6 having the brushes 7 is the inner side with respect to the holder 6, the brushes 7 are arranged on the outer side of the holder 6, or the side r...

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PUM

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Abstract

A throttle value spindle (3) is rotatably fixed to a throttle body (1). A recess is provided within the throttle body at one side of the throttle value spindle along the axial direction of the throttle valve spindle. A holder (6) is fixed to the throttle valve spindle within the recess and has brushes (7) at the opposite side of the throttle valve spindle, which rotates together with the throttle valve spindle. Resistors (12) are mounted on a ceramics circuit board (8) fixed on a housing (12). The housing engages with the recess in such a manner that the resistors contact with the brushes. When the brushes slide on the resistors corresponding to the rotation of the throttle value spindle, an electric signal is outputted continuously from the resistors.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a sensor for detecting the rotational angle of a rotary shaft, and more particularly to the structure of a throttle sensor for detecting the rotational angle of the throttle valve spindle of an internal combustion engine.BACKGROUND OF THE INVENTION[0002]As a prior art throttle sensor, there has been proposed one wherein, as disclosed in Japanese Utility Model Publication No. 99109 / 1982 published on June 18, 1982 entitled “Throttle open degree detector”, a sensor element is of the stand-alone type, and the sensor element including a bearing is mounted on a throttle body, thereby to detect the rotational angle of a throttle valve spindle.[0003]The prior art throttle sensor has been structurally such that, since the sensor element and the throttle body are separated each other, the former has the bearing portion, a joint etc. Therefore, the structure of the sensor element has become complicated causing such problems as a larg...

Claims

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Application Information

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IPC IPC(8): G01M19/00G01M99/00F02D9/00F02D35/00G01B7/30G01D5/165
CPCG01B7/30G01D5/1655
Inventor KUBOTA, MASANORIUENO, SADAYASU
Owner HITACHI LTD