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Motor-driven throttle valve control device for internal combustion engine

A motor drive and control device technology, which is applied in engine control, machine/engine, mechanical equipment, etc., can solve the problem of shaft length and achieve the effect of shortening the configuration space

Inactive Publication Date: 2006-10-18
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in this structure, since two parts consisting of one spring are arranged in series in the axial direction, there is a problem that the shaft is long.

Method used

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  • Motor-driven throttle valve control device for internal combustion engine
  • Motor-driven throttle valve control device for internal combustion engine
  • Motor-driven throttle valve control device for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The outer ring of the ball bearing 5 is fixed to the throttle body 3 , and the throttle shaft 6 is fixed to the inner ring of the same ball bearing 5 .

[0028] The other end of the throttle shaft 6 is held by a slide bearing 13 so as to be slidable with respect to the throttle body 3 . The throttle valve 4 is fixed on the throttle shaft 6 with the valve locking screw 11 .

[0029] In this way, the throttle valve 4 is rotatably arranged in the intake passage formed inside the hole wall 3D of the throttle body 3 .

[0030] The throttle gear 2 is fixed to the ball bearing 5 side end of the throttle shaft 6 .

[0031] The spring 1 (1A, 1B) is held on a shaft around the throttle shaft 6 . The rotational force of the throttle gear 2 is transmitted from a motor gear 7A fixed to an output shaft of the motor 7 via an intermediate gear 9 rotatably held on a gear shaft 8 .

[0032] In this embodiment, a brush-type DC motor is used as the motor 7, but a driver capable of genera...

Embodiment 2

[0087] Figure 11 Example 2 of the present invention is shown. relative to the above Figure 8 In terms of (a), in this embodiment, the spring with a small diameter is used as the return spring 1A, and the spring with a large diameter is used as the default spring 1B.

[0088] At this time, the hook-shaped hook portion 1E, which is the open end of the return spring 1A having a small diameter, is engaged with the locking portion 3E formed on the throttle body 3 .

[0089] On the other hand, a hook-shaped hook portion 1D, which is an open end of a default spring 1B having a large diameter, is hooked to a locking protrusion 2D formed on the throttle gear 2 .

[0090] if from Figure 11 At the default opening position, power on the motor and rotate the throttle gear 2 counterclockwise, then the locking protrusion 2D of the throttle gear 2 will rotate counterclockwise along with the hook-shaped hook part 1D located at one end of the default spring 1B. At this time, the short co...

Embodiment 3

[0096] Figure 12 Example 3 of the present invention is shown. relative to the above Figure 8 In terms of (a), in this embodiment, the spring engaging end surface 2E is formed on the outer side of the spring with a large diameter, so that the spring engaged on the short connecting arm portion 1C1 of the spring hook portion 1C is engaged with the spring formed on the throttle gear 2. End face 2E.

[0097] In this configuration, since one part of the short connecting arm portion 1C1 of the snap hook portion 1C can also serve as two locking portions, there is an advantage that the shape of parts other than the snap hook portion 1C can be freely set.

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PUM

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Abstract

The invention relates to a spring to ensure default opening is constituted by a single piano wire where a return spring (1A) with a larger coil diameter and a default spring (1B) with a smaller coil diameter are connected via a connection arm formed with a spring hook (1C). The spring with a smaller coil diameter is inserted in the spring with a larger coil diameter thereby the springs are overlapped in an axial direction as a duplex-winding spring structure. Further, a magnetic sensor (11A) is provided in a position inside the both spring with a larger coil diameter and spring with a smaller coil diameter.

Description

technical field [0001] The present invention relates to a throttle control device for controlling the intake air amount of an internal combustion engine according to the operating state of the machine, and more particularly to an evasive travel mechanism when the throttle control device driven by a motor fails. Background technique [0002] In the so-called motor-driven throttle control device driven and controlled by a DC motor or a stepping motor (hereinafter referred to as a motor), it is necessary to have a security function to keep the throttle opening at an opening that allows the vehicle to avoid running. Even in the event of failure of the control circuit and motor, the vehicle can be moved to a safe place. [0003] In addition, in order to prevent the so-called seizure that cannot be opened by the motor torque when starting due to the throttle valve biting the wall surface of the intake passage, it is necessary to maintain the throttle valve at the position when the...

Claims

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Application Information

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IPC IPC(8): F02D9/02F02D11/10
CPCF02D9/1065F02D9/107F02D2009/0277
Inventor 齐藤康夫志村隆弘
Owner HITACHI LTD
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