JPH04116256A - Electronic governor - Google Patents
Electronic governorInfo
- Publication number
- JPH04116256A JPH04116256A JP2236558A JP23655890A JPH04116256A JP H04116256 A JPH04116256 A JP H04116256A JP 2236558 A JP2236558 A JP 2236558A JP 23655890 A JP23655890 A JP 23655890A JP H04116256 A JPH04116256 A JP H04116256A
- Authority
- JP
- Japan
- Prior art keywords
- choke valve
- temperature
- engine
- electronic governor
- output
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 9
- 230000004913 activation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Means For Warming Up And Starting Carburetors (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、スロットルバルブの開度を制御してエンジン
回転をコントロールする火花点火式エンジンの電子ガバ
ナーに関し、特にオートチョーク機能を有する電子ガバ
ナーに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electronic governor for a spark ignition engine that controls engine rotation by controlling the opening degree of a throttle valve, and particularly relates to an electronic governor having an auto-choke function. .
（従来の技術）
従来、火花点火式エンジンでは始動性を良くするために
キャブレターにチョークバルブを備え、必要に応じて手
操作でチョークバルブを開閉しながらエンジンを始動す
るのが一般的であった。(Prior technology) Conventionally, spark ignition engines have been equipped with a choke valve in the carburetor to improve starting performance, and it has been common practice to start the engine by manually opening and closing the choke valve as necessary. .
又、エンジン回転をコントロールする電子ガバナーを持
ツ火花点火式エンジンでも、電子ガバナーが制御するの
はスロットルバルブの開閉だけであり、始動時のチョー
クバルブの開閉は手操作で行う必要があった。Furthermore, even in spark ignition engines that have an electronic governor that controls engine rotation, the electronic governor only controls the opening and closing of the throttle valve, and the choke valve must be opened and closed manually during startup.
（発明が解決しようとする課題）
本発明は、従来技術で始動時のチョークバルブの開閉は
手操作で行う必要があったのを、電子ガバナーにチョー
クバルブ制御機能を備えて始動時自動的にチョークバル
ブを閉じ、かつ、吸気管の温度により自動的にチョーク
閉塞時間をコントロールすることを目的とする。(Problems to be Solved by the Invention) The present invention provides an electronic governor with a choke valve control function that automatically opens and closes the choke valve at startup, whereas in the prior art it was necessary to manually open and close the choke valve at startup. The purpose is to close the choke valve and automatically control the choke closure time based on the temperature of the intake pipe.
（課題を解決するための手段）
本発明は上記目的を達成するために、吸気路に配置した
チョークバルブを電磁作動器で開閉制御可能に構成する
とともに、吸気路に吸気路表面の温度を検出する温度セ
ンサーを配置し、さらにチョークバルブの制御回路を電
子ガバナーに付設して、エンジン回転数検知手段が始動
回転数を検出することに基づき、チョークバルブ制御回
路からチョーク弁閉弁作動信号を発し、温度センサーが
所定温度を検出することに基づきチョークバルブ制御回
路からチョーク弁開弁作動信号を発するように構成した
ものである。(Means for Solving the Problems) In order to achieve the above object, the present invention configures a choke valve disposed in the intake passage so that it can be opened and closed by an electromagnetic actuator, and also detects the temperature of the surface of the intake passage. In addition, a choke valve control circuit is attached to the electronic governor, and the choke valve control circuit issues a choke valve closing operation signal based on the engine rotation speed detection means detecting the starting rotation speed. The choke valve control circuit is configured to issue a choke valve opening operation signal based on the temperature sensor detecting a predetermined temperature.
（作用） 本発明は次のように作用する。(effect) The invention works as follows.
エンジンに設置されたエンジン回転数検知手段である回
転数センサーは、始動時セルモータでエンジンが回転す
ると出力パルスを電子ガバナー内のＦＶコンバータに送
る。ＦＶ変換された電圧か始動回転検知電圧になれば、
電子ガバナーはワンショット鋸歯状波電圧からなるタイ
マを起動するとともに、吸気管内のチョークバルブを作
動制御するプルタイプソレノイドに通電し、チョークバ
ルブを閉じる。この状態でエンジンが始動する。A rotation speed sensor, which is an engine rotation speed detection means installed in the engine, sends an output pulse to the FV converter in the electronic governor when the starter motor rotates the engine at startup. If it is the FV converted voltage or the starting rotation detection voltage,
The electronic governor starts a timer consisting of a one-shot sawtooth voltage and energizes a pull-type solenoid that controls the operation of a choke valve in the intake pipe, closing the choke valve. The engine will start in this state.
一方、吸気管に設置しである温度センサーにより検出し
た吸気管温度を電子ガバナー内で温度電圧変換して、基
準電圧から引き算して作成したソレノイドオフ電圧と、
前述のタイマのワンショ・ソト鋸歯状波電圧とを比較し
て、鋸歯状波電圧かソレノイドオフ電圧に達した時にプ
ルタイプソレノイドをオフし、チョークバルブを全開と
する。On the other hand, the intake pipe temperature detected by a temperature sensor installed in the intake pipe is converted into temperature voltage in an electronic governor, and the solenoid off voltage is created by subtracting it from the reference voltage.
The voltage is compared with the one-shot sawtooth wave voltage of the timer mentioned above, and when the sawtooth wave voltage or the solenoid off voltage is reached, the pull type solenoid is turned off and the choke valve is fully opened.
吸気管温度が低ければソレノイドオフ電圧は高く、吸気
管温度が高ければソレノイドオフ電圧は低いので、タイ
マの鋸歯状波電圧がソレノイドオフ電圧に達する時間、
つまり、チョークバルブか閉じている時間は、吸気管温
度が低いほど長く高いほど短くなる。If the intake pipe temperature is low, the solenoid off voltage is high, and if the intake pipe temperature is high, the solenoid off voltage is low.
In other words, the time the choke valve is closed becomes longer as the intake pipe temperature is lower and shorter as the intake pipe temperature is higher.
（発明の効果）
本発明は上記のように構成され作用することから、従来
火花点火式エンジンでは必要に応じて手操作でチョーク
バルブを開閉しながらエンジンを始動していたのを、電
子ガバナーにチョークバルブ制御機能を備え始動時自動
的にチョークバルブを閉じ、かつ、吸気管の温度により
自動的にチョーク閉塞時間をコントロールできるように
したので、特に冷時始動性がよくなり、又、チョーク閉
塞時間をゼロにすることも可能になるので暖機時の再始
動性も改善できる。(Effects of the Invention) Since the present invention is configured and operates as described above, the electronic governor replaces the conventional spark ignition engine in which the engine was started by manually opening and closing the choke valve as needed. Equipped with a choke valve control function that automatically closes the choke valve at startup and automatically controls the choke closure time based on the temperature of the intake pipe, which improves cold starting performance and prevents choke blockage. Since it is also possible to set the time to zero, restartability during warm-up can also be improved.
（実施例） 以下、本発明の実施例を第１図乃至第４図で説明する。(Example) Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.
第３図における火花点火式エンジンの概念図及び、第４
図における吸気管９の説明図に示すように、エンジン１
０は空気をエアクリーナ８及び吸気管９を通して吸入し
、吸気管９のベンチュリ部９ａにあるメインノズル１３
からガソリン１４の供給を受けて作動する。エンジン回
転はベンチュリ部９ａの下流にあるスロットルバルブ１
５の開閉によって制御される。又、寒冷期等での始動時
はベンチュリ部９ａの上流にあるチョークバルブ１７を
閉塞して吸入空気量を絞り空燃混合比を高めて始動する
のが普通である。Conceptual diagram of the spark ignition engine in Fig. 3 and Fig. 4
As shown in the illustration of the intake pipe 9 in the figure, the engine 1
0 takes in air through an air cleaner 8 and an intake pipe 9, and a main nozzle 13 located in a venturi portion 9a of the intake pipe 9.
It operates by receiving gasoline 14 from the engine. The engine rotation is controlled by the throttle valve 1 located downstream of the venturi section 9a.
Controlled by opening and closing of 5. Furthermore, when starting the engine in a cold season, it is common to close the choke valve 17 located upstream of the venturi portion 9a to throttle the amount of intake air and increase the air-fuel mixture ratio.
エンジン１０のクランクシャフト又はカムシャフト１０
ａにはエンジン回転数検知手段である回転数センサー１
１が設置され、出力パルスＳを電子ガバナー１に与えて
いる。Crankshaft or camshaft 10 of engine 10
A is a rotation speed sensor 1 which is an engine rotation speed detection means.
1 is installed and provides an output pulse S to the electronic governor 1.
通常、電子ガバナー１は回転数センサー１１の出力Ｓを
変換して出力Ｑとし、スロットルバルブ制御用ソレノイ
ド１６に与えてスロットルバルブ１５を開閉してエンジ
ン回転を自動制御するが、さらに本発明実施例では、吸
気管９に設置しである温度センサー１２で検出した吸気
管９の温度Ｔを電子ガバナー１に入力し、変換した出力
Ｐをチョークバルブ制御用ソレノイド１８に与えてチョ
ークバルブ１７を開閉してエンジン始動時の自動制御を
する。Normally, the electronic governor 1 converts the output S of the rotation speed sensor 11 into an output Q, which is applied to the throttle valve control solenoid 16 to open and close the throttle valve 15 to automatically control the engine rotation. Now, the temperature T of the intake pipe 9 detected by the temperature sensor 12 installed in the intake pipe 9 is input to the electronic governor 1, and the converted output P is given to the choke valve control solenoid 18 to open and close the choke valve 17. automatically controls when starting the engine.
エンジン始動時のチョークバルブ制御動作を詳細に説明
すれば、第１図における電子ガバナーの要部ブロック図
及び、第２図における動作タイムチャートに示すように
、エンジン始動時回転数センサー１１の出力パルスＳが
始動検知回路２に入力されるが、始動検知回路２には図
示しないＦＶコンバータがあり、回転数センサ１１の出
力ＳはＦＶ変換されて第２図Ａのように回転数に比例し
た電圧となる。To explain in detail the choke valve control operation when starting the engine, as shown in the main block diagram of the electronic governor in FIG. 1 and the operation time chart in FIG. S is input to the start detection circuit 2, which has an FV converter (not shown), and the output S of the rotation speed sensor 11 is FV converted to a voltage proportional to the rotation speed as shown in FIG. 2A. becomes.
この電圧が始動回転検知電圧ａになれば、タイマ３を起
動して第２図Ｂのようなワンショット鋸歯状波電圧を発
生させ（第２図Ｂのｂ）、比較出力回路４を介して出力
Ｐを吸気管９内のチョークバルブ１７を制御するプルタ
イプソレノイド１８に通電しく第２図りのｄ）、チョー
クバルブ１７を閉じる。When this voltage reaches the starting rotation detection voltage a, the timer 3 is activated to generate a one-shot sawtooth wave voltage as shown in FIG. The output P is energized to the pull type solenoid 18 that controls the choke valve 17 in the intake pipe 9 (d) in the second diagram, and the choke valve 17 is closed.
一方、温度センサー１２により検出した吸気管９の温度
Ｔは、電子ガバナー１内の温度電圧変換回路５で電圧に
変換され、オフ電圧発生回路６で基準電圧７から引き算
して作成したソレノイドオフ電圧（第２図Ｂのｅ）を、
さきの比較出力回路４に入力してタイマ３の波形と比較
し、鋸歯状波電圧がソレノイドオフ電圧に達した時（第
２図Ｂのｅ）に、出力Ｐをオフとする電圧（第２図Ｃの
Ｃ）を作って比較出力回路４の出力Ｐのオン時間を制御
（第２図りのｈ）して、プルタイプソレノイド１８をオ
フとしチョークバルブ１７を全開とする。On the other hand, the temperature T of the intake pipe 9 detected by the temperature sensor 12 is converted into voltage by the temperature voltage conversion circuit 5 in the electronic governor 1, and the solenoid off voltage is created by subtracting it from the reference voltage 7 in the off voltage generation circuit 6. (Fig. 2B e),
It is input to the comparison output circuit 4 and compared with the waveform of the timer 3, and when the sawtooth wave voltage reaches the solenoid off voltage (e in Figure 2B), the voltage that turns off the output P (second C) in Figure C is created to control the on-time of the output P of the comparison output circuit 4 (h in the second diagram), turn off the pull type solenoid 18, and fully open the choke valve 17.
もしエンジン１０が暖機状態にあって吸気管９の温度が
高ければ温度電圧変換回路５で変換された電圧も高いの
で、基準電圧７から引き算して作成したソレノイドオフ
電圧は低く （第２図Ｂのｆ）なり、タイマ３の鋸歯状
波電圧がソレノイドオフ電圧に達する時間、つまり、出
力Ｐをオフとする電圧の立上り（第２図Ｃのｇ）は早く
なる。If the engine 10 is warmed up and the temperature of the intake pipe 9 is high, the voltage converted by the temperature-voltage conversion circuit 5 will also be high, so the solenoid off voltage created by subtracting it from the reference voltage 7 will be low (see Figure 2). f) in B, the time for the sawtooth wave voltage of the timer 3 to reach the solenoid off voltage, that is, the rise of the voltage that turns off the output P (g in FIG. 2C) becomes faster.
従って比較出力回路４の出力Ｐのオン時間は短く （第
２図りのｉ）なって、チョークバルブ１７が閉じている
時間は、吸気管９の温度が高いほど自動的に短くなる。Therefore, the ON time of the output P of the comparison output circuit 4 becomes shorter (i in the second diagram), and the time during which the choke valve 17 is closed automatically becomes shorter as the temperature of the intake pipe 9 becomes higher.
又、温度電圧変換回路５で変換された電圧及び、基準電
圧７を適当に設定することによって、吸気管９の温度が
成る値以上の時チョークバルブ１７が閉じている時間を
ゼロにすることも可能となるので、暖機時の再始動性も
改善できる。Furthermore, by appropriately setting the voltage converted by the temperature-voltage conversion circuit 5 and the reference voltage 7, the time during which the choke valve 17 is closed when the temperature of the intake pipe 9 exceeds a certain value can be set to zero. This makes it possible to improve restartability during warm-up.
第１図から第４図は本発明の実施例を示し、第１図は本
発明実施例の電子ガバナーの要部ブロック図、第２図は
同電子ガバナーの動作タイムチャート、第３図は同火花
点火式エンジンの概念図、第４図は同エンジン吸気管の
説明図である。
１・・・電子ガバナー（チョークバルブ制御回路）、９
・・・吸気路（吸気管）、１１・・・エンジン回転数検
知手段（回転数センサ）、１２・・・温度センサー１５
・・・スロットルバルブ、１６・１８・・・電磁作動器
（ソレノイド）、１７・・・チョークバルブ。1 to 4 show embodiments of the present invention, FIG. 1 is a block diagram of the main parts of the electronic governor according to the embodiment of the present invention, FIG. 2 is an operation time chart of the electronic governor, and FIG. 3 is the same. FIG. 4 is a conceptual diagram of a spark ignition engine, and is an explanatory diagram of an intake pipe of the engine. 1...Electronic governor (choke valve control circuit), 9
...Intake path (intake pipe), 11...Engine speed detection means (rotation speed sensor), 12...Temperature sensor 15
... Throttle valve, 16, 18... Electromagnetic actuator (solenoid), 17... Choke valve.
Claims (1)
ットルバルブを電磁作動器で開閉制御可能に構成し、こ
の電磁作動器にエンジンの回転数に基づく開閉制御信号
を伝達してエンジン回転数を制御するように構成した火
花点火式エンジンの電子ガバナーにおいて、 吸気路に配置したチョークバルブを電磁作 動器で開閉制御可能に構成するとともに、吸気路に吸気
路表面の温度を検出する温度センサーを配置し、 チョークバルブの制御回路を電子ガバナー に付設し、エンジン回転数検知手段が始動回転数を検出
することに基づき、チョークバルブ制御回路からチョー
ク弁閉弁作動信号を発し、温度センサーが所定温度を検
出することに基づきチョークバルブ制御回路からチョー
ク弁開弁作動信号を発するように構成した 火花点火式エンジンの電子ガバナー。[Claims] 1. A throttle valve disposed in the intake passage of a spark ignition engine is configured to be open/close controlled by an electromagnetic actuator, and an opening/closing control signal based on the engine rotation speed is transmitted to the electromagnetic actuator. In an electronic governor for a spark-ignition engine that is configured to control the engine speed by controlling the engine speed, the choke valve placed in the intake path is configured to be open/close controlled by an electromagnetic actuator, and the temperature on the surface of the intake path is controlled by the intake path. A temperature sensor for detection is arranged, a choke valve control circuit is attached to the electronic governor, and based on the engine rotation speed detection means detecting the starting rotation speed, the choke valve control circuit issues a choke valve closing activation signal, An electronic governor for a spark ignition engine configured to issue a choke valve opening operation signal from a choke valve control circuit based on a temperature sensor detecting a predetermined temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2236558A JPH04116256A (en) | 1990-09-04 | 1990-09-04 | Electronic governor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2236558A JPH04116256A (en) | 1990-09-04 | 1990-09-04 | Electronic governor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04116256A true JPH04116256A (en) | 1992-04-16 |
Family
ID=17002425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2236558A Pending JPH04116256A (en) | 1990-09-04 | 1990-09-04 | Electronic governor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04116256A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006329095A (en) * | 2005-05-27 | 2006-12-07 | Honda Motor Co Ltd | Electronic governor device for general-purpose internal combustion engine |
| US7171947B2 (en) | 2005-05-27 | 2007-02-06 | Honda Motor Co., Ltd. | Electrically-actuated throttle device for general-purpose engine |
| JP2007162576A (en) * | 2005-12-14 | 2007-06-28 | Honda Motor Co Ltd | Carburetor automatic control device for engine |
| CN100422535C (en) * | 2005-05-27 | 2008-10-01 | 本田技研工业株式会社 | Electrically-actuated throttle device for general-purpose engine |
| US7628387B1 (en) | 2008-07-03 | 2009-12-08 | Briggs And Stratton Corporation | Engine air/fuel mixing apparatus |
| US8219305B2 (en) | 2008-05-27 | 2012-07-10 | Briggs & Stratton Corporation | Engine with an automatic choke and method of operating an automatic choke for an engine |
| WO2022138356A1 (en) * | 2020-12-21 | 2022-06-30 | 三菱重工メイキエンジン株式会社 | Automatic choke device |
-
1990
- 1990-09-04 JP JP2236558A patent/JPH04116256A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006329095A (en) * | 2005-05-27 | 2006-12-07 | Honda Motor Co Ltd | Electronic governor device for general-purpose internal combustion engine |
| US7171947B2 (en) | 2005-05-27 | 2007-02-06 | Honda Motor Co., Ltd. | Electrically-actuated throttle device for general-purpose engine |
| CN100422535C (en) * | 2005-05-27 | 2008-10-01 | 本田技研工业株式会社 | Electrically-actuated throttle device for general-purpose engine |
| JP2007162576A (en) * | 2005-12-14 | 2007-06-28 | Honda Motor Co Ltd | Carburetor automatic control device for engine |
| JP4523543B2 (en) * | 2005-12-14 | 2010-08-11 | 本田技研工業株式会社 | Engine carburetor automatic control device |
| US8219305B2 (en) | 2008-05-27 | 2012-07-10 | Briggs & Stratton Corporation | Engine with an automatic choke and method of operating an automatic choke for an engine |
| US8434444B2 (en) | 2008-05-27 | 2013-05-07 | Briggs & Stratton Corporation | Engine with an automatic choke and method of operating an automatic choke for an engine |
| US8434445B2 (en) | 2008-05-27 | 2013-05-07 | Briggs & Stratton Corporation | Engine with an automatic choke and method of operating an automatic choke for an engine |
| US7628387B1 (en) | 2008-07-03 | 2009-12-08 | Briggs And Stratton Corporation | Engine air/fuel mixing apparatus |
| WO2022138356A1 (en) * | 2020-12-21 | 2022-06-30 | 三菱重工メイキエンジン株式会社 | Automatic choke device |
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