JPH0124362Y2 - - Google Patents
Info
- Publication number
- JPH0124362Y2 JPH0124362Y2 JP1983195000U JP19500083U JPH0124362Y2 JP H0124362 Y2 JPH0124362 Y2 JP H0124362Y2 JP 1983195000 U JP1983195000 U JP 1983195000U JP 19500083 U JP19500083 U JP 19500083U JP H0124362 Y2 JPH0124362 Y2 JP H0124362Y2
- Authority
- JP
- Japan
- Prior art keywords
- lever
- throttle valve
- idle opening
- rotated
- temperature
- 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
- 230000000881 depressing effect Effects 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 8
- 239000000446 fuel Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 5
- 230000000994 depressogenic effect Effects 0.000 description 4
- 230000006903 response to temperature Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Means For Warming Up And Starting Carburetors (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は気化器のアイドルアツプ装置に係
り、特に簡単な構成で冷機時の始動前にあるいは
冷機時の始動後の暖機運転中に、アクセルペダル
を踏込んで絞り弁を通常のアイドル開度よりも少
許開き側の所定アイドル開度からさらに開き側の
設定アイダル開度位置にアイドルアツプさせるこ
とにより、機関の早期復調を図り、動作が確実で
あり、また、冷機時の暖機運転中のヒータ使用に
際してはアクセルペダルを踏込んで絞り弁を設定
アイドル開度に保持させることにより、ヒータ効
果の向上を図り得る気化器のアイドルアツプ装置
に関する。[Detailed description of the invention] [Industrial application field] This invention relates to an idle-up device for a carburetor, and has a particularly simple configuration that allows it to be used before starting when the engine is cold or during warm-up operation after starting when the engine is cold. By depressing the accelerator pedal and raising the throttle valve from a predetermined idle opening position that is slightly wider than the normal idle opening position to a set idle opening position that is further open, the engine can be demodulated quickly and its operation can be ensured. The present invention also relates to an idle-up device for a carburetor that can improve the heater effect by depressing the accelerator pedal and holding the throttle valve at the set idle opening when using the heater during warm-up operation when the engine is cold.
気化器においては、機関始動時に濃い混合気を
おくる機構のひとつとして、チヨーク弁を設けて
いる。このチヨーク弁の過度の使用は燃料の浪費
やその他機関に悪影響を与えることになる。そこ
で、温度変化に応じて始動性、エミツシヨン、燃
費等が最適条件になる混合気を与えるべくチヨー
ク弁及び絞り弁の開度を自動的に調整する自動チ
ヨーク機構を備えた気化器が提案されている。
The carburetor is equipped with a chioke valve as one of the mechanisms for creating a rich air-fuel mixture when starting the engine. Excessive use of this choke valve results in wasted fuel and other adverse effects on the engine. Therefore, a carburetor equipped with an automatic check mechanism that automatically adjusts the openings of the check valve and throttle valve in order to provide a mixture with optimal startability, emissions, fuel efficiency, etc. in response to temperature changes has been proposed. There is.
第１図は、このような気化器の自動チヨーク機
構の側面図である。図において、２は温度変化に
より膨縮する部材、例えばワツクスを内蔵した感
温作動体で、温度に応じて膨縮するワツクスでロ
ツド４を進退動する。ロツド４は、回動軸６に軸
支したラツクレバー８の一端側に当接し、進退変
位によりラツクレバー８を回動する。ラツクレバ
ー８の他端側には、ラツクギア１０を設けてあ
る。ラツクギア１０は、弁軸１２に軸支したピニ
オンギア１４に噛み合つている。このピニオンギ
ア１４の回動で、ピニオンギア１４に一端を固定
したストラングラスプリング１６を介してチヨー
ク弁１８を開閉する。なお、２０は、ラツクレバ
ー８をロツド４に弾圧当接するばねである。ま
た、前記ラツクレバー８の一端側の省略した部位
には、カム（図示せず）が設けてあり、このカム
は後述の絞り弁４６を開閉する絞り弁レバー４８
に連絡されている。 FIG. 1 is a side view of the automatic chuck mechanism of such a carburetor. In the figure, reference numeral 2 denotes a temperature-sensitive actuator containing a member that expands and contracts in response to temperature changes, such as wax, and moves the rod 4 forward and backward using wax that expands and contracts in accordance with the temperature. The rod 4 comes into contact with one end of a rack lever 8 that is pivotally supported on a rotation shaft 6, and rotates the rack lever 8 by moving forward and backward. A rack gear 10 is provided on the other end side of the rack lever 8. The rack gear 10 meshes with a pinion gear 14 that is pivotally supported on the valve shaft 12. This rotation of the pinion gear 14 opens and closes the choke valve 18 via a strangle spring 16 whose one end is fixed to the pinion gear 14. Note that 20 is a spring that presses the rack lever 8 into contact with the rod 4. Further, a cam (not shown) is provided at the omitted portion on one end side of the lock lever 8, and this cam is connected to a throttle valve lever 48 that opens and closes a throttle valve 46, which will be described later.
has been contacted.
この構成により、気化器は、感温作動体によつ
て、機関の低温時にはチヨーク弁を閉じて濃い混
合気を生成するとともに絞り弁を通常のアイドル
開度よりも少許開き側の所定アイドル開度、いわ
ゆるフアーストアイドル開度に開き、また機関の
暖機運転状態に応じてチヨーク弁を次第に開けて
濃い混合気を薄めるとともに絞り弁を前記所定ア
イドル開度から次第に通常のアイドル開度に閉
じ、機関の始動性や燃費等が最適条件になる混合
気を供給する。このように、感温作動体によつて
自動的にチヨーク弁及び絞り弁を開閉する気化器
としては、既に特公昭52−5646号公報に開示され
ている。 With this configuration, the carburetor uses a temperature-sensitive actuator to close the choke valve to produce a rich mixture when the engine is cold, and to open the throttle valve to a predetermined idle opening that is slightly smaller than the normal idle opening. , opens to a so-called first idle opening, and gradually opens a throttle valve depending on the warm-up state of the engine to dilute the rich mixture, and gradually closes the throttle valve from the predetermined idle opening to a normal idle opening. It supplies an air-fuel mixture that provides optimal conditions for engine startability, fuel efficiency, etc. As described above, a carburetor which automatically opens and closes a choke valve and a throttle valve using a temperature-sensitive actuator has already been disclosed in Japanese Patent Publication No. 52-5646.
この公報に開示のものは、冷機時の始動前にア
クセルペダルを踏込むことにより絞り弁を前記所
定アイドル開度、いわゆるフアーストアイドル開
度に保持させ、始動後の暖機運転中にアクセルペ
ダルを踏込むことにより絞り弁の前記所定アイド
ル開度の保持を解除して感温作動体により次第に
通常のアイドル開度に閉じるものである。 What is disclosed in this publication is to maintain the throttle valve at the predetermined idle opening degree, so-called first idle opening degree, by depressing the accelerator pedal before starting when the engine is cold, and to press the accelerator pedal during warm-up operation after starting the engine. By depressing the throttle valve, the holding of the predetermined idle opening degree of the throttle valve is released, and the temperature-sensitive actuator gradually closes the throttle valve to the normal idle opening degree.
ところで、例えば寒冷地仕様車など大容量の室
内ヒータを持つ車輛における前述の如き気化器に
よりチヨーク弁及び絞り弁を開閉して低温下での
暖機運転中にヒータを使用した場合に、充分にヒ
ータ効果を得られないことがある。これは、低温
下での暖機運転中においては、機関発熱量よりも
ヒータ等の熱消費量が多いため、前記公報に開示
の感温作動体によつて自動的にチヨーク弁及び絞
り弁を開閉する気化器においては、通常のアイド
ル開度よりも少許開き側の所定アイドル開度に開
かれている絞り弁の開度に冷却水温度が均衡して
しまい、第２図の如く冷却水温度が設定値まで上
がらないからである。また、前記公報に開示のも
のは、冷機時始動後の暖機運転中にアクセルペダ
ルを踏込むと、絞り弁の所定アイドル開度の保持
が解除されてしまうものである。このため、機関
の暖機が進まず、またヒータ効果が得られないの
で車室が暖まらないという不都合があつた。
By the way, for example, in a vehicle equipped with a large-capacity indoor heater, such as a vehicle designed for cold regions, when the heater is used during warm-up at low temperatures by opening and closing the choke valve and throttle valve using the carburetor as described above, The heater effect may not be obtained. This is because during warm-up operation at low temperatures, the amount of heat consumed by the heater, etc. is greater than the amount of heat generated by the engine, so the temperature-sensitive actuator disclosed in the above publication automatically closes the choke valve and throttle valve. In a carburetor that opens and closes, the cooling water temperature balances with the opening of the throttle valve, which is opened at a predetermined idle opening slightly smaller than the normal idle opening, and the cooling water temperature changes as shown in Figure 2. This is because the value does not rise to the set value. Further, in the system disclosed in the above-mentioned publication, when the accelerator pedal is depressed during warm-up operation after a cold start, the holding of the predetermined idling opening of the throttle valve is canceled. As a result, the engine does not warm up properly, and the heater effect cannot be obtained, resulting in the inconvenience that the cabin is not warmed up.
従来、このような問題を解決するために、別途
温度センサを設けて気化器のアイドルアツプアク
チユエータを動作制御したり、またヒータスイツ
チに気化器のアイドルアツプアクチユエータを連
動させる等の対策を講じることにより、絞り弁を
前記所定アイドル開度からさらに開き側の設定ア
イドル開度位置に開いていた。しかし、従来のア
イドルアツプアクチユエータは、通常、吸気負圧
を作動源としているため、低温時、特に極低温時
に動作不良を招き易く、動作の確実性が損なわれ
る不都合があるとともに、アイドルアツプアクチ
ユエータを設けることにより、気化器にさらに他
の部品を装備する結果、コストアツプを招く不都
合がある。 Conventionally, in order to solve such problems, measures have been taken such as installing a separate temperature sensor to control the operation of the idle up actuator of the carburetor, or interlocking the idle up actuator of the carburetor with the heater switch. By doing so, the throttle valve was opened from the predetermined idle opening degree to a set idle opening position further on the opening side. However, since conventional idle-up actuators normally use intake negative pressure as their operating source, they tend to malfunction at low temperatures, especially at extremely low temperatures, which impairs the reliability of their operation. Providing the actuator requires the carburetor to be equipped with other parts, which inconveniently increases costs.
そこでこの考案の目的、感温作動体により自動
的にチヨーク弁及び絞り弁を開閉する気化器に設
けられた感温作動体を利用して、アクセルペダル
の踏込みによつて、冷機時の始動前あるいは冷機
時の始動後の暖機運転中に通常のアイドル開度よ
りも少許開き側の所定アイドル開度からさらに開
き側の設定アイドル開度位置にアイドルアツプさ
せることにより、簡単な構成で機関の早期復調を
図り得て、動作が確実であり、また、暖機運転中
のヒータの使用に際してはアクセルペダルの踏込
みにより絞り弁を所定アイドル開度からさらに開
き側の設定アイドル開度位置に保持し得て、ヒー
タ使用時に冷却水温度を設定値に保ち得て、ヒー
タ効果を向上し得る気化器のアイドルアツプ装置
を実現することにある。
Therefore, the purpose of this invention is to utilize the temperature-sensitive actuator installed in the carburetor, which automatically opens and closes the choke valve and throttle valve, to automatically open and close the throttle valve and throttle valve by pressing the accelerator pedal. Alternatively, by increasing the idle from a predetermined idle opening that is slightly wider than the normal idle opening during warm-up after starting when the engine is cold, to a set idle opening position that is further open, the engine can be adjusted with a simple configuration. Early demodulation can be achieved and operation is reliable.In addition, when using the heater during warm-up operation, the throttle valve can be held at a set idle opening position that is further open from the predetermined idle opening by pressing the accelerator pedal. An object of the present invention is to realize an idle-up device for a carburetor that can maintain the cooling water temperature at a set value when the heater is in use and improve the heater effect.
この目的を達成するためにこの考案は、感温作
動体の変位により冷機時に閉じられるチヨーク弁
に応じて絞り弁を通常のアイドル開度よりも少許
開き側の所定アイドル開度に開くとともに暖機運
転中に次第に開かれる前記チヨーク弁に応じて前
記絞り弁を次第に前記通常のアイドル開度に閉じ
る気化器において、前記チヨーク弁の弁軸と同軸
心上に回動中心を持つカムを設け、このカムによ
り回動される第１レバーを設け、この第１レバー
と弾圧係合して連動し冷機時に絞り弁レバーに対
して係合可能な位置に回転されるとともに暖機運
転完了時に前記絞り弁レバーに対して係合不可能
な位置に回転される第２レバーを設け、冷機時に
絞り弁レバーに対して係合可能な位置に回転され
た前記第２レバーにアクセルペダルを踏込んで前
記絞り弁レバーを係合させることにより暖機運転
完了時に前記絞り弁レバーに対して係合不可能な
位置に回転される前記第２レバーからアクセルペ
ダルを踏込んで前記絞り弁レバーの係合を外すま
で前記絞り弁を前記所定アイドル開度からさらに
開き側の設定アイドル開度位置に保持すべく前記
第２レバーの回転を所定位置で阻止し保持する当
接部材を設けたことを特徴とする。
To achieve this purpose, this invention opens the throttle valve to a predetermined idle opening slightly smaller than the normal idle opening according to the throttle valve that is closed when the engine is cold due to the displacement of the temperature-sensitive actuator, and warms up the throttle valve. In the carburetor, the throttle valve is gradually closed to the normal idle opening according to the throttle valve which is gradually opened during operation, and a cam having a rotation center coaxial with the valve shaft of the throttle valve is provided, A first lever is provided which is rotated by a cam, and is elastically engaged with and interlocked with the first lever, and is rotated to a position where it can engage with the throttle valve lever when the engine is cold, and when the warm-up operation is completed, the throttle valve is rotated. A second lever is provided that is rotated to a position where it cannot be engaged with the lever, and when the engine is cold, an accelerator pedal is depressed on the second lever that is rotated to a position where it can be engaged with the throttle valve lever to close the throttle valve. The second lever is rotated to a position where it cannot engage with the throttle valve lever when the warm-up operation is completed by engaging the lever, until the throttle valve lever is disengaged by depressing the accelerator pedal. The present invention is characterized in that a contact member is provided that prevents and holds the second lever from rotating at a predetermined position in order to hold the throttle valve at a set idle opening position that is further open from the predetermined idle opening.
次にこの考案の実施例を図に基づいて詳細に説
明する。第３〜５図はこの考案による気化器のア
イドルアツプ装置の実施例を示し、第３図は平面
図、第４図は所定温度以下の低温時の側面図、第
５図は所定温度以上のときの側面図である。図に
おいて、第１図と同一機能を果す部分には、同一
符号を付して説明する。即ち、感温作動体により
自動的にチヨーク弁及び絞り弁を開閉する気化器
として既に開示されているものは、前述第１図の
如く構成されている。図において、２は温度変化
により膨縮する部材、例えばワツクスを内蔵した
感温作動体で、温度に応じて膨縮するワツクスで
ロツド４を進退動する。ロツド４は、回動軸６に
軸支したラツクレバー８の一端側に当接し、進退
変位によりラツクレバー８を回動する。ラツクレ
バー８の他端側には、ラツクギア１０を設けてあ
る。ラツクギア１０は、弁軸１２に軸支したピニ
オンギア１４に噛み合つてある。このピニオンギ
ア１４の回動で、ピニオンギア１４に一端を固定
したストラングラスプリング１６を介してチヨー
ク弁１８を開閉する。なお、２０は、ラツクレバ
ー８をロツド４に弾圧当接するばねである。ま
た、前記ラツクレバー８の一端側の省略した部位
には、カム（図示せず）が設けてあり、このカム
は後述の絞り弁４６を開閉する絞り弁レバー４８
に連絡されている。
Next, an embodiment of this invention will be described in detail based on the drawings. Figures 3 to 5 show an embodiment of the idle-up device for a carburetor according to this invention, with Figure 3 being a plan view, Figure 4 being a side view when the temperature is below a predetermined temperature, and Figure 5 being a side view when the temperature is above a predetermined temperature. FIG. In the figure, parts that perform the same functions as those in FIG. 1 are given the same reference numerals and explained. That is, a carburetor that has already been disclosed as a carburetor that automatically opens and closes a choke valve and a throttle valve using a temperature-sensitive actuator is constructed as shown in FIG. 1 above. In the figure, reference numeral 2 denotes a temperature-sensitive actuator containing a member that expands and contracts in response to temperature changes, such as wax, and moves the rod 4 forward and backward using wax that expands and contracts in accordance with the temperature. The rod 4 comes into contact with one end of a rack lever 8 that is pivotally supported on a rotation shaft 6, and rotates the rack lever 8 by moving forward and backward. A rack gear 10 is provided on the other end side of the rack lever 8. The rack gear 10 meshes with a pinion gear 14 which is pivotally supported on the valve shaft 12. This rotation of the pinion gear 14 opens and closes the choke valve 18 via a strangle spring 16 whose one end is fixed to the pinion gear 14. Note that 20 is a spring that presses the rack lever 8 into contact with the rod 4. Further, a cam (not shown) is provided at the omitted portion on one end side of the lock lever 8, and this cam is connected to a throttle valve lever 48 that opens and closes a throttle valve 46, which will be described later.
has been contacted.
この構成による気化器３６は、感温作動体２に
よつて、機関の低温時にはチヨーク弁１８を閉じ
て濃い混合気を生成するとともに絞り弁４６を通
常のアイドル開度よりも少許開き側の所定アイド
ル開度、いわゆるフアーストアイドル開度に開
き、また機関の暖機運転状態に応じてチヨーク弁
１８を次第に開けて濃い混合気を薄めるとともに
絞り弁４６を前記所定アイドル開度から次第に通
常のアイドル開度に閉じ、機関の始動性や燃費等
が最適条件になる混合気を供給する。 The carburetor 36 with this configuration uses the temperature-sensitive actuator 2 to close the choke valve 18 to produce a rich mixture when the engine is at a low temperature, and to open the throttle valve 46 to a predetermined opening slightly smaller than the normal idle opening. The throttle valve 18 is gradually opened to dilute the rich air-fuel mixture according to the warm-up state of the engine, and the throttle valve 46 is gradually changed from the predetermined idle opening to a normal idle opening. It closes at the opening position and supplies the air-fuel mixture that optimizes engine startability and fuel efficiency.
このように、感温作動体２によつて自動的にチ
ヨーク弁１８及び絞り弁４６を開閉する気化器３
６において、前述自動チヨーク機構のラツクレバ
ー８に設けたラツクギア１０により回動するピニ
オンギア１４には、小円弧Ｓ部分と大円弧Ｌ部分
とからなる扇状のカム２２が設けてある。このカ
ム２２は、前記チヨーク弁１８と同軸心上の弁軸
１２を回動中心とするピニオンギア１４と連動し
回動する。 In this way, the carburetor 3 automatically opens and closes the choke valve 18 and the throttle valve 46 by the temperature-sensitive actuator 2.
6, a fan-shaped cam 22 consisting of a small arc S portion and a large arc L portion is provided on the pinion gear 14 which is rotated by a rack gear 10 provided on the rack lever 8 of the automatic chuck mechanism. The cam 22 rotates in conjunction with a pinion gear 14 whose rotation center is a valve shaft 12 coaxial with the chiyoke valve 18 .
前記ラツクレバー８の回動軸６には、第１レバ
ー２４を枢支している。この第１レバー２４の一
端側には摺接片２６を設け、他端側には第１スト
ツパ２８を設けている。第１レバー２４は、回動
軸６に巻装した第１ばね３０により矢印ｒ方向に
回転され、摺接片２６を低温時には前記カム２２
の小円弧Ｓ部分に、所定温度以上のときは大円弧
Ｌ部分に弾圧摺接する。このため、第１レバー２
４はカム２２に従動し回動する。 A first lever 24 is pivotally supported on the rotation shaft 6 of the rack lever 8. A sliding contact piece 26 is provided on one end of the first lever 24, and a first stopper 28 is provided on the other end. The first lever 24 is rotated in the direction of arrow r by a first spring 30 wound around the rotation shaft 6, and the sliding contact piece 26 is rotated by the cam 22 when the temperature is low.
When the temperature is higher than a predetermined temperature, the small arc S portion comes into elastic sliding contact with the large arc L portion. For this reason, the first lever 2
4 rotates following the cam 22.
前記ラツクレバー８の回動軸６には、前記第１
レバー２４とともに第２レバー３２を枢支してい
る。この第２レバー３２は、感温作動体２により
回動されるカム２２に従動し回動する第１レバー
２４と弾圧係合して連動し、冷機時に絞り弁レバ
ー４８に対して係合可能な位置に回転されるとと
もに、暖機運転完了時に絞り弁レバー４８に対し
て係合不可能な位置に回転される。第２レバー３
２の一端側には、前記第１レバー２４の第１スト
ツパ２８に係合する第２ストツパ３４と、気化器
３６に設けた当接部材たる当接面３８に当接する
当接片４０とを設け、他端側には係合縁４２を設
けている。第２レバー３２は、前記回動軸６に巻
装した第２ばね４４により矢印ｌ方向に回転さ
れ、第２ストツパ３４を第１ストツパ２８に弾圧
係合して第１レバー２４に連動する。 The rotation shaft 6 of the rack lever 8 has the first
A second lever 32 is pivotally supported together with the lever 24. This second lever 32 is interlocked by elastic engagement with the first lever 24 which is rotated by following the cam 22 which is rotated by the temperature-sensitive operating body 2, and can be engaged with the throttle valve lever 48 when the machine is cold. At the same time, when the warm-up operation is completed, the throttle valve lever 48 is rotated to a position where it cannot be engaged with the throttle valve lever 48. 2nd lever 3
2, a second stopper 34 that engages with the first stopper 28 of the first lever 24 and a contact piece 40 that contacts a contact surface 38 that is a contact member provided on the carburetor 36 are provided on one end side of the second lever 24. An engaging edge 42 is provided at the other end. The second lever 32 is rotated in the direction of arrow l by a second spring 44 wound around the rotating shaft 6, and the second stopper 34 is elastically engaged with the first stopper 28, so that the second lever 32 is interlocked with the first lever 24.
さらに、第２レバー３２は、第５図に示す如く
カム２２で矢印ｌ方向に回転される第１レバー２
４との係合を離脱させることができる。この離脱
では、後述する如く第２レバー３２の当接片４０
を気化器３６に設けた当接面３８に当接させるこ
とで、第２レバー３２は回転を阻止され所定位置
に保持される。なお、第１および第２レバー２
４，３２が連動してｒ方向に回転し当接面３８に
当接片４０を当接したときに、カム２２の小円弧
Ｓ部分と摺接片２６とは摺接させず、すき間ｔを
設けている。 Further, the second lever 32 is connected to the first lever 32 which is rotated in the direction of arrow l by the cam 22 as shown in FIG.
4 can be disengaged. In this detachment, the contact piece 40 of the second lever 32
By bringing the second lever 32 into contact with a contact surface 38 provided on the carburetor 36, the second lever 32 is prevented from rotating and held at a predetermined position. Note that the first and second levers 2
4 and 32 rotate in the r direction in conjunction with each other, and when the contact piece 40 contacts the contact surface 38, the small circular arc S portion of the cam 22 and the sliding contact piece 26 do not come into sliding contact, and the gap t is maintained. It is set up.
このように、カム２２に対して第１及び第２レ
バー２４，３２を構成したことで、所定温度以下
の低温時には、第２レバー３２は絞り弁レバー４
８に対して第４図の実線に示す係合可能な位置に
回転する。一方、所定温度以上の例えば暖機完了
時には、第２レバー３２は絞り弁レバー４８に対
して第５図に二点鎖線で示す係合不可能な位置に
回転する。 By configuring the first and second levers 24 and 32 with respect to the cam 22 in this way, the second lever 32 is moved to the throttle valve lever 4 when the temperature is lower than a predetermined temperature.
8 to the engageable position shown by the solid line in FIG. On the other hand, when the temperature is higher than a predetermined temperature, for example, when warm-up is completed, the second lever 32 rotates to a position in which it cannot engage with the throttle valve lever 48, as shown by the two-dot chain line in FIG.
気化器３６のチヨーク弁下流の吸気通路３７に
設けた絞り弁４６を開閉する絞り弁レバー４８に
は、前記第２レバー３２の係合縁４２に係合すべ
く係合片５０を設けている。この係合片５０は、
冷機時の所定温度以下の低温時にはアクセルペダ
ルを踏込むことにより、第４図に実線で示す係合
可能な位置にある第２レバー３２の係合縁４２に
絞り弁ばね５２で弾圧係合することができる。こ
の係合で矢印ｒ方向に回転される第２レバー３２
は、当接片４０が当接部材たる当接面３８に当接
して所定位置で阻止され、絞り弁４６を前記所定
アイドル開度からさらに開き側の二点鎖線で示す
設定アイドル開度位置に保持する。暖機運転が完
了して所定温度以上になると、第５図に二点鎖線
で示す係合不可能な位置に第２レバー３２は回転
可能になり、アクセルペダルを踏込んで絞り弁レ
バー４８を前記設定アイドル開度以上に開けるこ
とで係合縁４２と係合片５０との係合を外し、通
常のアイドル開度に戻すことができる。 A throttle valve lever 48 that opens and closes a throttle valve 46 provided in the intake passage 37 downstream of the choke valve of the carburetor 36 is provided with an engagement piece 50 to engage with the engagement edge 42 of the second lever 32. . This engagement piece 50 is
When the temperature is lower than a predetermined temperature when the engine is cold, by depressing the accelerator pedal, the throttle valve spring 52 is elastically engaged with the engagement edge 42 of the second lever 32, which is in the engagement position shown by the solid line in FIG. be able to. The second lever 32 is rotated in the direction of arrow r by this engagement.
The contact piece 40 comes into contact with the contact surface 38, which is a contact member, and is blocked at a predetermined position, and the throttle valve 46 is moved from the predetermined idle opening degree to the set idle opening position shown by the two-dot chain line on the opening side. Hold. When the warm-up operation is completed and the temperature reaches a predetermined temperature or higher, the second lever 32 becomes rotatable to the non-engageable position shown by the two-dot chain line in FIG. By opening the idle opening more than the set idle opening, the engaging edge 42 and the engaging piece 50 can be disengaged and return to the normal idle opening.
この構成によるこの考案の作用を説明する。 The operation of this invention with this configuration will be explained.
第４図において、機関が冷却して低温度になる
と感温作動体２のロツド４は引退動し、ラツクレ
バー８は矢印ａ方向に回転する。この回転は、ピ
ニオンギア１４に伝わりチヨーク弁１８を閉じる
とともに、ラツクレバー８の図示しないカムに連
絡する絞り弁レバー４８により絞り弁４６を通常
のアイドル開度よりも少許開き側の所定アイドル
開度に開く。このとき、ピニオンギア１４ととも
に矢印ｂ方向に回転するカム２２に沿つて、摺接
片２６は大円弧Ｌ部分から小円弧Ｓ部分に移動す
る。この移動で、第２レバー３２は第１レバー２
４とともに矢印ｒ方向に回転され、第２レバー３
２の当接片４０を当接面３８に当接させて第１お
よび第２レバー２４，３２はそれぞれ第４図に実
線で示す位置に保持される。これにより、第２レ
バー３２は、冷機時に絞り弁レバー４８に対して
係合可能な位置に回転される。このとき、第１レ
バー２４の摺接片２６と小円弧Ｓ部分とは、すき
間ｔを有している。 In FIG. 4, when the engine cools down to a low temperature, the rod 4 of the temperature-sensitive actuating member 2 is retracted, and the latch lever 8 is rotated in the direction of arrow a. This rotation is transmitted to the pinion gear 14 to close the choke valve 18, and the throttle valve lever 48, which is connected to a cam (not shown) of the lock lever 8, moves the throttle valve 46 to a predetermined idle opening that is slightly smaller than the normal idle opening. open. At this time, the sliding contact piece 26 moves from the large arc L portion to the small arc S portion along the cam 22 that rotates in the direction of arrow b together with the pinion gear 14. With this movement, the second lever 32 is moved to the first lever 2.
4 and rotated in the direction of arrow r, and the second lever 3
The first and second levers 24, 32 are held in the positions indicated by solid lines in FIG. 4, respectively, by bringing the two contact pieces 40 into contact with the contact surface 38. As a result, the second lever 32 is rotated to a position where it can engage with the throttle valve lever 48 when the engine is cold. At this time, there is a gap t between the sliding contact piece 26 of the first lever 24 and the small arc S portion.
この状態で、アクセルペダルを踏込んで絞り弁
レバー４８を矢印ｃ方向に回転すると、第２レバ
ー３２は係合片５０に押されて第１レバー２４と
ともに矢印ｌ方向に回転する。係合片５０が第２
レバー３２の係合縁４２先端を越えると、第１，
第２レバー２４，３２は第１ばね３０により元の
位置に戻る。次いでアクセルペダルの踏込みを放
して絞り弁レバー４８を戻すと、第４図に二点鎖
線で示す如く第２レバー３２の係合縁４２に係合
片５０が係合し、回転する第２レバー３２の当接
片４０が当接面３８に当接し、第２レバー３２の
回転を所定位置で阻止し保持するので、絞り弁レ
バー４８は絞り弁４６を前記所定アイドル開度か
らさらに開き側の二点鎖線で示す設定アイドル開
度位置に保持する。 In this state, when the accelerator pedal is depressed and the throttle valve lever 48 is rotated in the direction of arrow c, the second lever 32 is pushed by the engagement piece 50 and rotates together with the first lever 24 in the direction of arrow l. The engagement piece 50 is the second
Beyond the tip of the engaging edge 42 of the lever 32, the first,
The second levers 24, 32 are returned to their original positions by the first spring 30. Next, when the accelerator pedal is released and the throttle valve lever 48 is returned, the engagement piece 50 engages with the engagement edge 42 of the second lever 32, as shown by the two-dot chain line in FIG. 4, and the second lever rotates. 32 contact pieces 40 contact the contact surface 38 to prevent and hold the second lever 32 in a predetermined position, so the throttle valve lever 48 moves the throttle valve 46 further from the predetermined idle opening degree to the opening side. It is held at the set idle opening position shown by the two-dot chain line.
このように、冷機時の始動前あるいは冷機時の
始動後の暖機運転中にアクセルペダルを踏込むこ
とによつて、絞り弁４６は通常のアイドル開度よ
りも少許開き側の所定アイドル開度からさらに開
き側の設定アイドル開度に開かれるので、暖機運
転時にアイドルアツプすることができる。このた
め、機関の早期復調を図ることができ、また、ア
クセルペダルを踏込んで各レバー２４，３２，４
８を係合させることにより絞り弁４６を設定アイ
ドル開度位置に保持するので動作が確実である。
さらに、暖機運転中のヒータの使用に際しては、
アクセルペダルを踏込んで絞り弁４６を設定アイ
ドル開度に保持させることにより、ヒータ使用時
において冷却水温度を設定温度まで上昇させ、ヒ
ータ効果を充分発揮することができる。 In this way, by depressing the accelerator pedal before starting when the engine is cold or during warm-up after starting when the engine is cold, the throttle valve 46 is set to a predetermined idle opening that is slightly smaller than the normal idle opening. Since it is further opened to the set idle opening degree on the opening side, the idle can be increased during warm-up operation. Therefore, early demodulation of the engine can be achieved, and when the accelerator pedal is depressed, each lever 24, 32, 4
Since the throttle valve 46 is held at the set idle opening position by engaging the throttle valve 8, the operation is reliable.
Furthermore, when using the heater during warm-up operation,
By depressing the accelerator pedal and holding the throttle valve 46 at the set idle opening degree, the cooling water temperature can be raised to the set temperature when the heater is in use, and the heater effect can be fully exerted.
なお、この低温時の状態において、第１レバー
２４の摺接片２６とカム２２の小円弧Ｓ部分との
間にすき間ｔを設けたことにより、絞り弁レバー
４８の係合片５０が係合縁４２先端を越えたとき
の第１ばね３０による摺接片２６のカム２２への
衝撃や、絞り弁ばね５２による係合時の衝撃を防
止することができる。 Note that in this low-temperature state, by providing a gap t between the sliding contact piece 26 of the first lever 24 and the small arc S portion of the cam 22, the engagement piece 50 of the throttle valve lever 48 is not engaged. It is possible to prevent an impact on the cam 22 of the sliding contact piece 26 caused by the first spring 30 when it passes over the tip of the edge 42, and an impact caused by the throttle valve spring 52 when engaged.
前述の如く絞り弁４６を所定アイドル開度から
さらに開き側のアイドル開度位置に保持して暖機
運転を続け、冷却水温度が所定温度以上になる
と、感温作動体２のロツド４は次第に押進動し、
第５図に示す如くラツクレバー８を矢印ｄ方向に
回転する。ラツクレバー８の回転でチヨーク弁１
８は次第に開き、カム２２は矢印ｅ方向に回転し
て摺接片２６は大円弧Ｌ部分に移動する。この移
動で、第１レバー２４は第５図に示す位置に回転
するが、第２レバー３２は実線に示す如く絞り弁
レバー４８との係合により元の位置にある。この
ため、チヨーク弁１８が開いた暖機完了後におい
ても、特に低温時においてチヨーク弁１８の開き
と無関係に絞り弁４６を設定アイドル開度のアイ
ドルアツプ状態に維持し、機関の過冷却を防止す
ることができる。 As described above, when the throttle valve 46 is held at an idle opening position further open from the predetermined idle opening and warm-up operation is continued, and the cooling water temperature reaches a predetermined temperature or higher, the rod 4 of the temperature-sensitive actuator 2 gradually opens. push forward,
As shown in FIG. 5, the latch lever 8 is rotated in the direction of arrow d. When the lock lever 8 rotates, the yoke valve 1
8 gradually opens, the cam 22 rotates in the direction of arrow e, and the sliding contact piece 26 moves to the large arc L portion. This movement rotates the first lever 24 to the position shown in FIG. 5, while the second lever 32 remains in its original position due to engagement with the throttle valve lever 48, as shown in solid lines. Therefore, even after warm-up is completed when the check valve 18 is opened, the throttle valve 46 is maintained at the idle up state of the set idle opening regardless of the opening of the check valve 18, especially at low temperatures, to prevent overcooling of the engine. can do.
この状態からアイドルアツプ状態を解除するに
は、アクセルペダルを踏込んで絞り弁レバー４８
を矢印ｃ方向に回転し、係合片５０から第２レバ
ー３２の係合縁４２の係合を外す。係合を外して
アクセルペダルの踏込みを放すと、第２レバー３
２は第２ばね４４により矢印ｌ方向に回転し、絞
り弁レバー４８に対して第５図に二点鎖線で示す
係合不可能な位置に回転する。従つて、第２レバ
ー３２は絞り弁レバー４８との係合可能位置から
外れるので、設定アイドル開度から通常のアイド
ル開度に戻り、アイドルアツプは解除される。ま
た、解除後はアクセルペダルを踏込んで絞り弁レ
バー４８を矢印ｃ方向に回転しても、第２レバー
３２は係合不可能な位置にあるので、アイドルア
ツプする不都合はない。 To release the idle up state from this state, depress the accelerator pedal and press the throttle valve lever 48.
is rotated in the direction of arrow c to disengage the engagement edge 42 of the second lever 32 from the engagement piece 50. When the engagement is disengaged and the accelerator pedal is released, the second lever 3
2 is rotated in the direction of arrow l by the second spring 44, and is rotated to a position where it cannot engage with the throttle valve lever 48 as shown by the two-dot chain line in FIG. Therefore, the second lever 32 is removed from the engagement position with the throttle valve lever 48, so the set idle opening returns to the normal idle opening, and the idle up is released. Furthermore, even if the throttle valve lever 48 is rotated in the direction of the arrow c by depressing the accelerator pedal after the release, the second lever 32 is in a position where it cannot be engaged, so there is no problem of idle up.
なお、アイドルアツプすべき角度は、絞り弁レ
バー４８の係合片５０の位置や第２レバー３２の
第２ストツパ３４の位置により任意に設定するこ
とができる。また、アイドルアツプすべき位置に
第２レバー３２を回転させる作動温度は、カム２
２の形状を変えることにより設定できる。 Note that the angle at which the idle should be raised can be arbitrarily set by the position of the engagement piece 50 of the throttle valve lever 48 and the position of the second stopper 34 of the second lever 32. In addition, the operating temperature for rotating the second lever 32 to the position where the idling is to be increased is the temperature at which the cam 2
It can be set by changing the shape of 2.
このようにこの考案によれば、感温作動体によ
り自動的にチヨーク弁及び絞り弁を開閉する気化
器に設けた感温作動体を利用し、アクセルペダル
の踏込みにより冷機時の始動前あるいは冷機時の
始動後の暖機運転中に通常のアイドル開度よりも
少許開き側の所定アイドル開度からさらに開き側
の設定アイドル開度位置に絞り弁を保持すること
ができる。これにより、所定温度以下の冷機時に
おいてはアクセルペダルを踏込んで絞り弁を設定
アイドル開度以上に回動することにより所定アイ
ドル開度からさらに開き側の設定アイドル開度に
絞り弁をアイドルアツプさせ得て、また暖機完了
後は必要によりアイドルアツプ状態を維持しある
いはアクセルペダルを踏込むことにより解除する
ことができる。このため、従来の如く例えば温度
センサ等さらに他の部品を要することなく簡単な
構成で機関の早期復調を図り得て、動作が確実で
あり、また、暖機運転中のヒータ使用に際しては
アクセルペダルを踏込んで絞り弁を設定アイドル
開度に保持させることにより、ヒータ使用時に冷
却水温度が設定温度まで上がらない不都合を解消
してヒータ効果の向上を図ることができる。
In this way, according to this invention, a temperature-sensitive actuator installed in the carburetor that automatically opens and closes the choke valve and throttle valve is used to automatically open and close the throttle valve and the throttle valve. During warm-up operation after startup, the throttle valve can be maintained at a predetermined idle opening position that is slightly open compared to the normal idle opening, and at a set idle opening that is further open. As a result, when the engine is cold and the temperature is below a predetermined temperature, by depressing the accelerator pedal and rotating the throttle valve beyond the set idle opening, the throttle valve idles up from the predetermined idle opening to the set idle opening on the open side. After the engine warms up, the idle up state can be maintained or released by depressing the accelerator pedal, if necessary. Therefore, it is possible to achieve early demodulation of the engine with a simple configuration without requiring other parts such as a temperature sensor as in the past, and operation is reliable. By depressing the throttle valve and holding the throttle valve at the set idle opening degree, it is possible to improve the heater effect by eliminating the inconvenience that the cooling water temperature does not rise to the set temperature when the heater is in use.
第１図は自動チヨーク機構の側面図、第２図は
機関回転数と冷却水温度の関係のグラフを示す図
である。第３〜５図はこの考案の実施例を示し、
第３図は平面図、第４図は所定温度以下の低温時
の側面図、第５図は所定温度以上のときの側面図
である。
図において、２は感温作動体、８はラツクレバ
ー、１０はラツクギア、１４はピニオンギア、１
８はチヨーク弁、２２はカム、２４は第１レバ
ー、２６は摺接片、２８は第１ストツパ、３０は
第１ばね、３２は第２レバー、３４は第２ストツ
パ、３６は気化器、３８は当接面、４０は当接
片、４２は係合縁、４４は第２ばね、４６は絞り
弁、４８は絞り弁レバー、５０は係合片である。
FIG. 1 is a side view of the automatic choke mechanism, and FIG. 2 is a graph showing the relationship between engine speed and cooling water temperature. Figures 3 to 5 show examples of this invention,
3 is a plan view, FIG. 4 is a side view when the temperature is below a predetermined temperature, and FIG. 5 is a side view when the temperature is above the predetermined temperature. In the figure, 2 is a temperature-sensitive actuating body, 8 is a rack lever, 10 is a rack gear, 14 is a pinion gear, 1
8 is a check valve, 22 is a cam, 24 is a first lever, 26 is a sliding contact piece, 28 is a first stopper, 30 is a first spring, 32 is a second lever, 34 is a second stopper, 36 is a carburetor, 38 is a contact surface, 40 is an abutment piece, 42 is an engagement edge, 44 is a second spring, 46 is a throttle valve, 48 is a throttle valve lever, and 50 is an engagement piece.
Claims (1)
ヨーク弁に応じて絞り弁を通常のアイドル開度よ
りも少許開き側の所定アイドル開度に開くととも
に暖機運転中に次第に開かれる前記チヨーク弁に
応じて前記絞り弁を次第に前記通常のアイドル開
度に閉じる気化器において、前記チヨーク弁の弁
軸と同軸心上に回動中心を持つカムを設け、この
カムにより回動される第１レバーを設け、この第
１レバーと弾圧係合して連動し冷機時に絞り弁レ
バーに対して係合可能な位置に回転されるととも
に暖機運転完了時に前記絞り弁レバーに対して係
合不可能な位置に回転される第２レバーを設け、
冷機時に絞り弁レバーに対して係合可能な位置に
回転された前記第２レバーにアクセルペダルを踏
込んで前記絞り弁レバーを係合させることにより
緩機運転完了時に前記絞り弁レバーに対して係合
不可能な位置に回転される前記第２レバーからア
クセルペダルを踏込んで前記絞り弁レバーの係合
を外すまで前記絞り弁を前記所定アイドル開度か
らさらに開き側の設定アイドル開度位置に保持す
べく前記第２レバーの回転を所定位置で阻止し保
持する当接部材を設けたことを特徴とする気化器
のアイドルアツプ装置。 The throttle valve is opened to a predetermined idle opening that is slightly more open than the normal idle opening in response to the throttle valve that is closed during cold operation due to the displacement of the temperature-sensitive actuating body, and the throttle valve is opened gradually during warm-up operation. In the carburetor, the throttle valve is gradually closed to the normal idle opening degree, and a cam having a rotation center coaxial with the valve shaft of the choke valve is provided, and a first lever is provided which is rotated by the cam. , is elastically engaged with and interlocked with this first lever, and is rotated to a position where it can engage with the throttle valve lever when the machine is cold, and is also moved to a position where it cannot engage with the throttle valve lever when warm-up operation is completed. providing a second lever that is rotated;
By depressing the accelerator pedal to engage the second lever, which has been rotated to a position where it can be engaged with the throttle valve lever when the machine is cold, the throttle valve lever is engaged with the throttle valve lever when the slow machine operation is completed. The throttle valve is maintained at a set idle opening position further open from the predetermined idle opening until the throttle valve lever is disengaged by depressing the accelerator pedal from the second lever which has been rotated to a position where the throttle valve cannot be opened. An idle up device for a carburetor, characterized in that an abutting member is provided for preventing and holding the second lever at a predetermined position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19500083U JPS60102450U (en) | 1983-12-20 | 1983-12-20 | Vaporizer idle up device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19500083U JPS60102450U (en) | 1983-12-20 | 1983-12-20 | Vaporizer idle up device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60102450U JPS60102450U (en) | 1985-07-12 |
| JPH0124362Y2 true JPH0124362Y2 (en) | 1989-07-24 |
Family
ID=30418957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19500083U Granted JPS60102450U (en) | 1983-12-20 | 1983-12-20 | Vaporizer idle up device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60102450U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS525646A (en) * | 1975-07-03 | 1977-01-17 | Yagi Kougiyou Kk | Method of forming clamp at hot side surface of blank by rolling |
| JPS52129840A (en) * | 1976-04-26 | 1977-10-31 | Toyota Motor Corp | Automatic choker for carbureter of internal combustion engine |
-
1983
- 1983-12-20 JP JP19500083U patent/JPS60102450U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS525646A (en) * | 1975-07-03 | 1977-01-17 | Yagi Kougiyou Kk | Method of forming clamp at hot side surface of blank by rolling |
| JPS52129840A (en) * | 1976-04-26 | 1977-10-31 | Toyota Motor Corp | Automatic choker for carbureter of internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60102450U (en) | 1985-07-12 |
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