JPS6327074Y2 - - Google Patents
Info
- Publication number
- JPS6327074Y2 JPS6327074Y2 JP1981124871U JP12487181U JPS6327074Y2 JP S6327074 Y2 JPS6327074 Y2 JP S6327074Y2 JP 1981124871 U JP1981124871 U JP 1981124871U JP 12487181 U JP12487181 U JP 12487181U JP S6327074 Y2 JPS6327074 Y2 JP S6327074Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve opening
- rotor
- coil spring
- throttle valve
- throttle shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Description
【考案の詳細な説明】
本考案は、例えば電子制御式燃料噴射装置を備
えた点火内燃機関等におけるスロツトルシヤフト
と絞り弁開度センサーとの連結装置の改良に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a connecting device between a throttle shaft and a throttle valve opening sensor in, for example, an ignition internal combustion engine equipped with an electronically controlled fuel injection device.
最近、従来の気化器を用いない新しい電子制御
式燃料噴射装置を備えた点火内燃機関が脚光を浴
びるに至つているが、これはアクセルペダルの変
位により選定される燃料噴射量に応ずる絞り弁開
度をコンピユータにより機関の運転状態に合わせ
て最高値に集中的に制御するものであつて、その
制御のためには絞り弁開度をセンサーにより常時
検出するようにしておかなければならない。そこ
で、この種機関においては、第１図及び第２図に
示した如く、吸気胴１の外壁に絞り弁開度センサ
ー２を固着すると共に該センサー２のロータ３の
内周壁に溝３ａを設け、一方スロツトルシヤフト
４に径方向の透孔４ａを設けると共に該透孔４ａ
内に一対のスチールボール５，５と該スチールボ
ール５，５を外方へ弾圧するコイルスプリング６
を挿入し、スロツトルシヤフト４をロータ３に挿
通してコイルスプリング６の弾力によりスチール
ボール５の一部分を溝３ａ内に陥入せしめること
によりスロツトルシヤフト４とロータ３とを連結
し、又絞り弁開度センサー２に異常が生じてロー
タ３が固着した場合スロツトルシヤフト４がロー
タ３に対して回動してスチールボール５がロータ
３の内壁によりコイルスプリング６の弾力に抗し
て透孔４ａ内に押し込まれることにより上記連結
が解除され、これによつてスロツトルシヤフト４
と絞り弁開度センサー２との固着が防止されるよ
うになつていた。ところが、このように構成され
た従来のスロツトルシヤフトと絞り弁開度センサ
ーとの連結装置には、次のような欠点があつた。
即ち、この装置のコイルスプリング６は第２図に
示した如く両端に該スプリング６の伸縮方向（ス
ロツトルシヤフト４の径方向）と直角な座巻部６
ａを設けていたため、スロツトルシヤフト４の回
動時にスチールボール４がロータ３により該ロー
タ３の円周方向の力を受けると、第３図に示した
如く透孔４ａとボール５との間のクリアランスの
分だけボール５がスロツトルシヤフト４の円周方
向にたやすく移動してしまい。これがガタとなつ
て表われてスロツトルシヤフト４の回動角とロー
タ３の回動角との間の誤差（ヒステリシス）とな
り、センサー２による絞り弁開度の検出が正確に
行えないという欠点があつた。尚、これを式で表
すために、例えば第３図においてスロツトルシヤ
フト４の中心からスチールボール５の中心までの
距離をｌ、スチールボール５の中心から透孔４ａ
の内壁面までの距離をｄ、スチールボール５の半
径をｒとすれば、スロツトルシヤフト４の回動角
とロータ３の回動角との間の誤差θは、
θ＝tan-1ｄ／ｌ−tan-1ｒ／ｌ
となる。 Recently, ignition internal combustion engines equipped with a new electronically controlled fuel injection system that does not use a conventional carburetor have been in the spotlight. The throttle valve opening degree is intensively controlled by a computer to the maximum value according to the operating condition of the engine, and in order to do this control, the throttle valve opening degree must be constantly detected by a sensor. Therefore, in this type of engine, as shown in FIGS. 1 and 2, a throttle valve opening sensor 2 is fixed to the outer wall of the intake cylinder 1, and a groove 3a is provided in the inner peripheral wall of the rotor 3 of the sensor 2. On the other hand, the throttle shaft 4 is provided with a radial through hole 4a, and the through hole 4a is
A pair of steel balls 5, 5 inside and a coil spring 6 that presses the steel balls 5, 5 outward.
The throttle shaft 4 is inserted into the rotor 3, and a part of the steel ball 5 is caused to fall into the groove 3a by the elasticity of the coil spring 6, thereby connecting the throttle shaft 4 and the rotor 3. When an abnormality occurs in the valve opening sensor 2 and the rotor 3 becomes stuck, the throttle shaft 4 rotates relative to the rotor 3 and the steel ball 5 is pushed through the hole by the inner wall of the rotor 3 against the elasticity of the coil spring 6. 4a, the above-mentioned connection is released, and the throttle shaft 4a is thereby released.
This prevents the throttle valve opening sensor 2 from sticking to the throttle valve opening sensor 2. However, the conventional connecting device between the throttle shaft and the throttle valve opening sensor configured as described above has the following drawbacks.
That is, as shown in FIG. 2, the coil spring 6 of this device has end turns 6 at both ends perpendicular to the direction of expansion and contraction of the spring 6 (radial direction of the throttle shaft 4).
a, when the steel ball 4 receives a force in the circumferential direction of the rotor 3 during the rotation of the throttle shaft 4, the space between the through hole 4a and the ball 5 as shown in FIG. The ball 5 easily moves in the circumferential direction of the throttle shaft 4 by the amount of clearance. This appears as play, resulting in an error (hysteresis) between the rotation angle of the throttle shaft 4 and the rotation angle of the rotor 3, which has the disadvantage that the sensor 2 cannot accurately detect the opening of the throttle valve. It was hot. In order to express this in a formula, for example, in FIG.
If the distance to the inner wall of the steel ball 5 is d, and the radius of the steel ball 5 is r, then the error θ between the rotation angle of the throttle shaft 4 and the rotation angle of the rotor 3 is as follows: θ=tan -1 d/ l-tan -1 r/l.
本考案は上記欠点を除去したスロツトルシヤフ
トと絞り弁開度センサーとの連結装置を提供せん
とするものであるが、以下第４図に示した一実施
例に基づき上記従来例と同一の部材には同一符号
を付してこれを説明すれば、６′は両端を巻きつ
ぱなしにしたコイルスプリングである。 The present invention aims to provide a connecting device between a throttle shaft and a throttle valve opening sensor that eliminates the above-mentioned drawbacks.The following is based on an embodiment shown in FIG. 4, which uses the same members as the conventional example. 6' is a coil spring whose both ends are kept wound.
本案連結装置は上述の如く構成されているか
ら、スチールボール５はコイルスプリング６′に
よりスロツトルシヤフト４の径方向の力だけでな
く円周方向の力も受けるようになり、第４図に示
した如く透孔４ａの内壁面に片寄せされた状態と
なる。従つて、スチールボール４はロータ３によ
り該ロータ３の円周方向の力を受けてもスロツト
ルシヤフト４の円周方向にはほとんど移動しなく
なる。従つて、ガタがほとんどなくなるのでスロ
ツトルシヤフト４の回動角とロータ３の回動角と
の間の誤差もほとんど生じない。実際に実験によ
りこれを確かめてみたところ、振動耐久テスト後
において、上記従来例の場合初期特性に対して１
〜３％の誤差が生じていたのに対し、本案実施例
の場合0.5％以下の誤差しか生じなかつた。 Since the proposed coupling device is constructed as described above, the steel ball 5 receives not only the radial force of the throttle shaft 4 but also the circumferential force due to the coil spring 6', as shown in FIG. As shown in FIG. Therefore, even if the steel balls 4 receive force from the rotor 3 in the circumferential direction of the rotor 3, they hardly move in the circumferential direction of the throttle shaft 4. Therefore, since there is almost no backlash, there is almost no error between the rotation angle of the throttle shaft 4 and the rotation angle of the rotor 3. When we actually verified this through an experiment, we found that after a vibration durability test, the conventional example above had an initial characteristic of 1
While an error of ~3% occurred, in the case of the present example, an error of less than 0.5% occurred.
上述のように、本案連結装置によればスロツト
ルシヤフトの回動角と絞り弁開度センサーのロー
タの回動角との間の誤差がほとんど生じないの
で、該センサーによる絞り弁開度の検出が正確に
行われるという極めて重要な効果がある。 As described above, according to the present coupling device, there is almost no error between the rotation angle of the throttle shaft and the rotation angle of the rotor of the throttle valve opening sensor, so that the sensor can detect the throttle valve opening. This has the extremely important effect of ensuring that the process is carried out accurately.
第１図は従来のスロツトルシヤフトと絞り弁開
度センサーとの連結装置の分解斜視図、第２図は
第１図−線に沿う断面図、第３図は上記実施
例のスロツトルシヤフト回動時の要部拡大断面
図、第４図は本考案によるスロツトルシヤフトと
絞り弁開度センサーとの連結装置の一実施例の要
部断面図である。
１……吸気胴、２……絞り弁開度センサー、３
……ロータ、３ａ……溝、４……スロツトルシヤ
フト、５……スチールボール、６′……コイルス
プリング。
Fig. 1 is an exploded perspective view of a conventional connecting device between a throttle shaft and a throttle valve opening sensor, Fig. 2 is a sectional view taken along the line shown in Fig. 1, and Fig. 3 is a diagram of the throttle shaft circuit of the above embodiment. FIG. 4 is an enlarged cross-sectional view of a main part of an embodiment of a connecting device between a throttle shaft and a throttle valve opening sensor according to the present invention. 1... Intake cylinder, 2... Throttle valve opening sensor, 3
...Rotor, 3a...Groove, 4...Throttle shaft, 5...Steel ball, 6'...Coil spring.
Claims (1)
内に挿入され且つコイルスプリングにより外方へ
弾圧されたスチールボールの一部分を、絞り弁開
度センサーのロータの内周壁に設けられた溝内に
陥入せしめることによりスロツトルシヤフトとロ
ータとを連結するようにして成るスロツトルシヤ
フトと絞り弁開度センサーとの連結装置におい
て、上記コイルスプリングの端部を巻きつぱなし
にして上記スチールボールを上記透孔の内壁面に
片寄せしたことを特徴とする連結装置。 A portion of the steel ball, which is inserted into a radial hole provided in the throttle shaft and pressed outward by a coil spring, falls into a groove provided in the inner peripheral wall of the rotor of the throttle valve opening sensor. In a connecting device between a throttle valve opening sensor and a throttle valve opening sensor, which connects the throttle shaft and the rotor by inserting the coil spring into the coil spring, the end of the coil spring is left wound and the steel ball is inserted through the through hole. A connecting device characterized by being offset to the inner wall surface of a hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12487181U JPS5830729U (en) | 1981-08-24 | 1981-08-24 | Connection device between throttle shaft and throttle valve opening sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12487181U JPS5830729U (en) | 1981-08-24 | 1981-08-24 | Connection device between throttle shaft and throttle valve opening sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5830729U JPS5830729U (en) | 1983-02-28 |
| JPS6327074Y2 true JPS6327074Y2 (en) | 1988-07-22 |
Family
ID=29918721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12487181U Granted JPS5830729U (en) | 1981-08-24 | 1981-08-24 | Connection device between throttle shaft and throttle valve opening sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5830729U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6693517B2 (en) | 2000-04-21 | 2004-02-17 | Donnelly Corporation | Vehicle mirror assembly communicating wirelessly with vehicle accessories and occupants |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6023476Y2 (en) * | 1980-01-14 | 1985-07-12 | 株式会社京浜精機製作所 | vaporizer butterfly valve |
-
1981
- 1981-08-24 JP JP12487181U patent/JPS5830729U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5830729U (en) | 1983-02-28 |
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