JPH03279640A - Sensor device for throttle opening detection - Google Patents

Abstract

PURPOSE:To prevent hysteresis from being generated at a throttle opening sensor, even in the case in which the tip contacting portions of a derive side turning lever and a driven side turning lever have worn in time, by putting them into the state of their contacting each other at all times through elastic members. CONSTITUTION:The rotation of a throttle valve 56 is transmitted to a drive side turning lever 2 through a throttle valve support shaft 51, and at the inside of a lever housing portion 2A at the tip of this lever, the spherical end portion 58B of a driven side turning lever 58 is pinchingly held at its center portion by the same force from both sides by means of sliders 4A, 4B, so the driven side turning lever 58 is in linkage with the drive side turning lever 2, and a sensor shaft 52A is rotated by a determined angle. Hereupon, even if the contacting portions of the spherical end portion 58B and sliders 4A, 4B wear, contact is maintained at all times by means of springs 5A, 5B, so hysteresis being generated at the output characteristic of a throttle sensor 52 can be prevented.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、スロットル開度検出用センサ装置に係り、更
に詳しくは、自動車、オートバイ、船外機に装備されて
いるキャブレタ　スロットルボディ等のスロットルバル
ブの開度を検出し、それに基づきエンジンの点火時期、
燃料噴射量等を制御するためのスロットル開度検出用セ
ンサ装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sensor device for detecting a throttle opening, and more specifically, to a sensor device for detecting a throttle opening, and more specifically, to a sensor device for detecting a throttle opening, and more specifically, for a throttle opening detection sensor device such as a carburetor or throttle body installed in an automobile, motorcycle, or outboard motor. Detects the valve opening and adjusts the engine ignition timing based on that.
The present invention relates to a sensor device for detecting throttle opening for controlling fuel injection amount and the like.

〔従来の技術〕[Conventional technology]

一般に、自動車、船外機等においては、そのエンジンの
点火時期は、マグネトのステータをキャブレタ（スロッ
トルボディ）のスロットルバルブ（吸気通路を流れる吸
入空気の流量を制御する絞り弁）の開度と連動させるこ
とによって変化させている。一方、昨今においては、ス
ロットルバルブの開度（以下、「スロットル開度」とい
う。）を検出し、この検出開度に比例する電圧信号を出
力するスロットルセンサ（通常、可変抵抗器を含んで構
成されたポテンショメータが使用される。Generally, in automobiles, outboard motors, etc., the ignition timing of the engine is determined by linking the magneto stator with the opening of the throttle valve (throttle valve that controls the flow rate of intake air flowing through the intake passage) of the carburetor (throttle body). It changes by making it happen. On the other hand, in recent years, throttle sensors (usually composed of variable resistors) detect the opening degree of the throttle valve (hereinafter referred to as "throttle opening degree") and output a voltage signal proportional to the detected opening degree. A potentiometer is used.

）を装備し、当該センサの出力に基づきエンジン点火時
期、燃料噴射量等を制御する電子制御燃料噴射システム
が開発されている。), and an electronically controlled fuel injection system has been developed that controls engine ignition timing, fuel injection amount, etc. based on the output of the sensor.

第７図ないし第９図には、この電子制御燃料噴射システ
ムに使用されるスロットル開度検出用センサ装置の一般
的なものが示されている。7 to 9 show typical throttle opening detection sensor devices used in this electronically controlled fuel injection system.

この内、第７図のものは、連結部材５０を介してスロッ
トルバルブの支軸（スロットルバルブ支軸）５１にスロ
ットルセンサ５２のセンサ軸（入力軸）５２Ａを直接連
結するとともに、キャブレタ本体５３にボディ部材５４
．５４を介してスロットルセンサ５２を装備したもので
ある。Among these, the one shown in FIG. 7 directly connects the sensor shaft (input shaft) 52A of the throttle sensor 52 to the throttle valve support shaft (throttle valve support shaft) 51 via the connecting member 50, and also connects the sensor shaft (input shaft) 52A to the carburetor body 53. Body member 54
．． A throttle sensor 52 is installed via 54.

また、第８図に示す従来例では、スロットルセンサ５２
は、ゴムマウント６０を介してキャブレタ本体５３に装
着されている。また、スロットル開度はギヤー機構６１
を介して検出されるようになっている。Furthermore, in the conventional example shown in FIG. 8, the throttle sensor 52
is attached to the carburetor body 53 via a rubber mount 60. In addition, the throttle opening is determined by the gear mechanism 61.
It is now detected through.

しかし、第７図に示す従来例にあっては、キャブレタ本
体５３の振動がスロットルセンサ５２に直接伝わること
となり、これがため耐振性が悪いという欠点があった。However, in the conventional example shown in FIG. 7, the vibration of the carburetor body 53 is directly transmitted to the throttle sensor 52, which has the disadvantage of poor vibration resistance.

一方、第８図に示す従来例にあっては、ゴムマウント６
０とギヤー機構６１の作用により耐振性の面では改善さ
れてはいるが、ギヤー機構６１の調整時に軸間距離！の
設定に多くの手間が掛かり、また、この軸間距離ｌが正
規の長さより大きい場合にはバックラッシュが大きくな
り、センサの出力の追従性が悪くなり、一方、正規の長
さより小さい場合にはセンサ軸５２Ａに無理が加わり、
ギヤー機構６１の摩耗が激しくなり、同時に当該摩耗に
よって生じた微細粒子が摺動部に付着して、スロットル
バルブ支軸５１又はセンサ軸５２Ａが円滑に回転しなく
なるという不都合が生じていた。On the other hand, in the conventional example shown in FIG.
0 and the action of the gear mechanism 61 has improved vibration resistance, but when adjusting the gear mechanism 61, the center distance! It takes a lot of effort to set the distance l, and if the distance l between the axes is larger than the standard length, backlash will increase and the followability of the sensor output will deteriorate.On the other hand, if it is smaller than the standard length, When force is applied to the sensor shaft 52A,
The wear of the gear mechanism 61 becomes severe, and at the same time, fine particles generated by the wear adhere to the sliding parts, resulting in an inconvenience that the throttle valve support shaft 51 or the sensor shaft 52A cannot rotate smoothly.

Claims (1)

【特許請求の範囲】[Claims] （１）、エンジン内への吸気量を調整するスロットルバ
ルブが設けられた駆動側回転軸と、この駆動側回転軸に
連結された従動側回転軸とを有し、この従動側回転軸を
含んで構成され、当該従動側回転軸の回転角に比例する
電圧信号を出力する回転式信号可変出力手段を備えたス
ロットル開度検出用センサ装置において、 前記駆動側回転軸と従動側回転軸との間に、回転力伝達
手段を介装し、 この回転力伝達手段を、前記駆動側回転軸に固定された
駆動側回動レバーと、この駆動側回動レバーに対応して
前記従動側回転軸に装備された従動側回動レバーと、当
該両レバーの先端部に設けられた係合機構とにより構成
し、 この係合機構が、前記両レバーの先端部を含んで構成さ
れるとともに、当該両レバーの先端部相互間に介装され
且つ前記従動側レバーの回動方向の両側から当該従動側
レバーをほぼ同じ力で押圧する弾性部材を有しているこ
とを特徴としたスロットル開度検出用センサ装置。(1) It has a drive-side rotation shaft provided with a throttle valve that adjusts the amount of air intake into the engine, and a driven-side rotation shaft connected to the drive-side rotation shaft, including the driven-side rotation shaft. A throttle opening detection sensor device comprising: a rotary signal variable output means for outputting a voltage signal proportional to the rotation angle of the driven rotation shaft; A rotational force transmission means is interposed between the drive side rotation lever fixed to the drive side rotation shaft and the driven side rotation shaft corresponding to the drive side rotation lever. It consists of a driven-side rotating lever equipped on the lever, and an engagement mechanism provided at the tips of both levers, and this engagement mechanism includes the tips of both levers, and the engagement mechanism includes the tips of both levers. Throttle opening detection characterized by having an elastic member interposed between the tip ends of both levers and pressing the driven lever with substantially the same force from both sides in the rotating direction of the driven lever. sensor device.