JPH0519021B2 - - Google Patents
Info
- Publication number
- JPH0519021B2 JPH0519021B2 JP58159690A JP15969083A JPH0519021B2 JP H0519021 B2 JPH0519021 B2 JP H0519021B2 JP 58159690 A JP58159690 A JP 58159690A JP 15969083 A JP15969083 A JP 15969083A JP H0519021 B2 JPH0519021 B2 JP H0519021B2
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- throttle valve
- opening
- engine
- pressure chamber
- 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 - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 239000007858 starting material Substances 0.000 claims description 12
- 239000000446 fuel Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010792 warming Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005325 percolation Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
- F02M1/08—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically
- F02M1/10—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically dependent on engine temperature, e.g. having thermostat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/08—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the pneumatic type
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Description
【発明の詳細な説明】
［発明の技術分野］
この発明は内燃機関の再始動装置に係り、特に
暖機時の再始動性の向上と冷機時の暖機運転中に
おけるヒータのウオーム効果の向上とを、簡単な
構成の装置で確実に果し得る内燃機関の再始動装
置に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a restart device for an internal combustion engine, and particularly to an improvement in restartability during warm-up and an improvement in the warm effect of a heater during warm-up operation when the engine is cold. The present invention relates to an internal combustion engine restarting device that can reliably accomplish the following with a device having a simple configuration.
［発明の技術的背景］
所定時間走行して機関を停止した後の短時間内
における暖機時の再始動性は、一般に不良であ
る。これは、機関余熱によるパーコレーシヨンで
混合気の空燃比がリツチになり、点火性を悪化さ
せるためである。そこで、暖機時の再始動の際に
は、気化器絞り弁をアイドル開度から開放側の設
定開度に開動して吸入空気量を増加し、混合気を
点火可能な空燃比にまでリーン化することにより
点火性を改善している。[Technical Background of the Invention] Restartability during warm-up within a short time after the engine has been stopped after running for a predetermined period of time is generally poor. This is because the air-fuel ratio of the air-fuel mixture becomes rich due to percolation due to engine residual heat, which deteriorates ignition performance. Therefore, when restarting after warming up, the carburetor throttle valve is opened from the idle opening to the set opening on the open side to increase the amount of intake air and lean the air-fuel mixture to an air-fuel ratio that can ignite. This improves ignition performance.
また、冷機時の始動においては、チヨーク弁を
閉動して混合気をリツチにし、点火性を改善して
いる。 Furthermore, when starting the engine when the engine is cold, the choke valve is closed to enrich the air-fuel mixture and improve ignition performance.
［背景技術の問題点］
ところで、前述暖機時の再始動においては、リ
ツチな混合気をリーン化するために、吸気通路負
圧で作動するアクチユエータを設け、絞り弁を開
動させている。しかし、このアクチユエータによ
る絞り弁の作動は、機関停止時にアイドル開度に
戻つている絞り弁を、機関始動後の負圧で開動す
るため、確実な作動が得られなかつた。[Problems with Background Art] By the way, in the above-mentioned restart during warm-up, in order to make the rich air-fuel mixture lean, an actuator that operates with negative pressure in the intake passage is provided to open the throttle valve. However, the actuator cannot operate the throttle valve reliably because the throttle valve, which returns to the idle opening when the engine is stopped, is opened by the negative pressure after the engine is started.
また、前述冷機時の始動においては、回転を安
定させるために、チヨーク弁の閉度に応じて絞り
弁を開動させている。しかし、機関完爆後には、
過濃混合気を防止するためにチヨーク弁を開くの
で、相対的に絞り弁が閉じて回転が下がることに
なる。このため、暖機運転中におけるヒータのウ
オーム効果を期待できなかつた。そこで、冷機時
の始動における機関の早期復調を図りつつ、ヒー
タのウオーム効果を期待し得る簡略な装置の実現
が望まれた。 Furthermore, in the above-mentioned startup when the engine is cold, the throttle valve is opened in accordance with the degree of closure of the choke valve in order to stabilize the rotation. However, after the engine exploded,
Since the throttle valve is opened to prevent an overrich mixture, the throttle valve closes relatively and the engine speed decreases. For this reason, no warm effect of the heater could be expected during warm-up operation. Therefore, it has been desired to realize a simple device that can achieve early demodulation of the engine when starting the engine when it is cold, and can also be expected to have a warm effect from the heater.
［発明の目的］
この発明はこのような問題を解消し、簡単な構
成で確実に暖機時の機関の再始動性の向上を図る
とともに冷機時の暖機運転中におけるヒータのウ
オーム効果をも向上し得る内燃機関の再始動装置
を実現することを目的とする。[Objective of the Invention] The present invention solves these problems, reliably improves restartability of the engine during warm-up with a simple configuration, and also reduces the warm effect of the heater during warm-up operation when the engine is cold. The purpose of this invention is to realize an improved restart device for an internal combustion engine.
［発明の構成］
この目的を達成するためにこの発明は、内燃機
関の気化器絞り弁をアイドル開度から開放側の設
定開度に保持するアクチユエータを設け、このア
クチユエータには吸気通路負圧の導入により前記
絞り弁を閉鎖方向に作動させて前記アイドル開度
に閉動させるととも大気圧の導入により前記絞り
弁を開放方向に作動させて前記設定開度に開動さ
せる負圧室を設け、この負圧室と前記絞り弁の下
流側吸気通路とを負圧通路で連通し、この負圧通
路の途中には通電により前記負圧室と大気とを連
通するとともに通電の停止により前記負圧室と吸
気通路とを連通する制御弁を設け、この制御弁と
電源との間には始動時にONになるスタータスイ
ツチと車室内温度が所定温度以下でONになる感
温スイツチとを並列に接続して設けたことを特徴
とする。[Structure of the Invention] In order to achieve this object, the present invention is provided with an actuator that maintains a carburetor throttle valve of an internal combustion engine from an idle opening to a set opening on the open side, and this actuator is provided with an intake passage negative pressure. providing a negative pressure chamber that operates the throttle valve in a closing direction and closes it to the idle opening degree by introducing atmospheric pressure, and operates the throttle valve in an opening direction and opens it to the set opening degree by introducing atmospheric pressure; This negative pressure chamber and the intake passage on the downstream side of the throttle valve are communicated with each other by a negative pressure passage, and in the middle of this negative pressure passage, the negative pressure chamber is communicated with the atmosphere by being energized, and when the energization is stopped, the negative pressure is A control valve is provided that communicates between the passenger compartment and the intake passage, and a starter switch that is turned on at startup and a temperature-sensitive switch that is turned on when the vehicle interior temperature is below a predetermined temperature are connected in parallel between this control valve and the power supply. It is characterized by being provided as follows.
［発明の実施例］
次にこの発明の実施例を図に基づいて詳細に説
明する。[Embodiments of the Invention] Next, embodiments of the invention will be described in detail based on the drawings.
第１〜３図は、この発明の実施例を示すもので
ある。図において、２は吸気通路、４は気化器絞
り弁、６はアクチユエータである。アクチユエー
タ６は、図示しない内燃機関の絞り弁４をアイド
ル開度から開放側の設定開度に保持する。このア
クチユエータ６には、負圧室８を設けている。負
圧室８は、吸気通路負圧の導入により絞り弁４を
閉鎖方向に作動させてアイドル開度に閉動させる
とともに、大気室の導入により絞り弁４を開放方
向に作動させて設定開度に開動させる。 1 to 3 show embodiments of this invention. In the figure, 2 is an intake passage, 4 is a carburetor throttle valve, and 6 is an actuator. The actuator 6 maintains a throttle valve 4 of an internal combustion engine (not shown) at a set opening on the open side from the idle opening. This actuator 6 is provided with a negative pressure chamber 8 . The negative pressure chamber 8 operates the throttle valve 4 in the closing direction to close it to the idle opening by introducing negative pressure in the intake passage, and operates the throttle valve 4 in the opening direction by introducing the atmospheric chamber to reach the set opening. to open and move.
負圧室８の一部壁を構成するダイヤフラム１０
は、内装したバネ１２により絞り弁４を開動させ
る開放方向に弾圧されている。前記ダイヤフラム
１０には、作動杆１４を突設している。作動杆１
４は、先端を絞り弁４の開放方向に指向させ、前
進時に絞り弁４をアイドル開度から開放側の設定
開度に保持する。 Diaphragm 10 forming part of the wall of negative pressure chamber 8
is pressed in the opening direction to open the throttle valve 4 by an internal spring 12. The diaphragm 10 has an operating rod 14 projecting therefrom. Operating rod 1
4 has its tip directed in the opening direction of the throttle valve 4, and maintains the throttle valve 4 at a set opening on the opening side from the idle opening when moving forward.
なお、符号１６は、ダイヤフラム１０とともに
負圧室８の一部壁を構成するベローズである。 Note that the reference numeral 16 is a bellows that constitutes a part of the wall of the negative pressure chamber 8 together with the diaphragm 10 .
前記絞り弁４の下流側吸気通路２には、負圧ポ
ート１８を設ける。この負圧ポート１８に始端す
る負圧通路２０を設け、この負圧通路２０をアク
チユエータ６の負圧室８に設けた導圧ポート２２
に終端させる。この負圧通路２０の途中には、通
電により負圧室８と大気とを連通するとともに、
通電の停止により負圧室８と吸気通路２とを連通
する制御弁たる負圧切換弁２４を設ける。この負
圧切換弁２４には、大気開口２６を設けている。 A negative pressure port 18 is provided in the intake passage 2 on the downstream side of the throttle valve 4. A negative pressure passage 20 starting from this negative pressure port 18 is provided, and this negative pressure passage 20 is provided at a pressure guiding port 22 provided in the negative pressure chamber 8 of the actuator 6.
be terminated. In the middle of this negative pressure passage 20, the negative pressure chamber 8 and the atmosphere are communicated by energization, and
A negative pressure switching valve 24 is provided as a control valve that communicates the negative pressure chamber 8 and the intake passage 2 by stopping the power supply. This negative pressure switching valve 24 is provided with an atmosphere opening 26 .
負圧切換弁２４には、始動時にONになるスタ
ータスイツチ２８と車室内温度を検知し所定温度
以下でONになる感温スイツチ３０とを並列に接
続している。また、これら各スイツチ２８，３０
は、電源３２に並列に接続している。これによ
り、図に示す如く、負圧切換弁２４と電源３２と
の間には、始動時にONになるスタータスイツチ
２８と所定温度以下でONになる感温スイツチ３
０と並列に接続して設ける。 Connected in parallel to the negative pressure switching valve 24 are a starter switch 28 that turns on at the time of starting the vehicle, and a temperature-sensitive switch 30 that detects the temperature inside the vehicle and turns on when the temperature is below a predetermined temperature. In addition, each of these switches 28, 30
are connected in parallel to the power supply 32. As a result, as shown in the figure, between the negative pressure switching valve 24 and the power source 32, there are a starter switch 28 that is turned on at startup, and a temperature-sensitive switch 3 that is turned on when the temperature is below a predetermined temperature.
0 and connected in parallel.
前記負圧切換弁２４は、各スイツチ２８，３０
の少なくとも一がONになると、電源３２を接続
されて通電され、吸気通路２０の負圧ポート１８
側を閉鎖し、負圧室８と大気開口２６とを連通す
る。アクチユエータ６は、負圧室８への大気圧の
導入で、ダイヤフラム１０がバネ１２により絞り
弁４の開放方向に押進されて作動杆１４を前進さ
せ、絞り弁４をアイドル開度から開放側の設定開
度に開動する。 The negative pressure switching valve 24 has switches 28 and 30.
When at least one of the
The side is closed, and the negative pressure chamber 8 and the atmospheric opening 26 are communicated with each other. In the actuator 6, when atmospheric pressure is introduced into the negative pressure chamber 8, the diaphragm 10 is pushed by the spring 12 in the opening direction of the throttle valve 4, and the actuating rod 14 is advanced, thereby changing the throttle valve 4 from the idle opening to the open side. It opens to the set opening degree.
一方、負圧切換弁２４は、各スイツチ２８，３
０のいずれもがOFFになると、電源３２との接
続を遮断されて通電を停止され、大気開口２６側
を閉鎖し、負圧室８と吸気通路２とを連通する。
アクチユエータ６は、負圧室８への負圧の導入
で、ダイヤフラム１０がバネ１２を圧縮しつつ絞
り弁４の閉鎖方向に引退して作動杆１４を後退さ
せ、絞り弁４を閉動させてアイドル開度に戻す。 On the other hand, the negative pressure switching valve 24 is connected to each switch 28, 3.
0 is turned OFF, the connection with the power supply 32 is cut off and the energization is stopped, the atmospheric opening 26 side is closed, and the negative pressure chamber 8 and the intake passage 2 are communicated with each other.
In the actuator 6, when negative pressure is introduced into the negative pressure chamber 8, the diaphragm 10 compresses the spring 12 and retires in the direction of closing the throttle valve 4, retracts the operating rod 14, and closes the throttle valve 4. Return to idle opening.
次に作用について説明する。 Next, the effect will be explained.
内燃機関（図示せず）の停止時には、負圧切換
弁２４への電源３２の接続が遮断されている。負
圧切換弁２４は、大気開口２６側を閉鎖し、アク
チユエータ６の負圧室８と吸気通路２とを連通し
ている。このとき、吸気通路２は、機関停止で大
気圧となつているので、負圧室８も大気圧になつ
ている。したがつて、ダイヤフラム１０は、第２
図に示す如くバネ１２で押進されて作動杆１４を
前進させている。このため、アクチユエータ６
は、作動杆１４により絞り弁４をアイドル開度か
ら開いた設定開度に保持している。 When the internal combustion engine (not shown) is stopped, the connection of the power source 32 to the negative pressure switching valve 24 is cut off. The negative pressure switching valve 24 closes the atmospheric opening 26 side and communicates the negative pressure chamber 8 of the actuator 6 with the intake passage 2 . At this time, since the intake passage 2 is at atmospheric pressure with the engine stopped, the negative pressure chamber 8 is also at atmospheric pressure. Therefore, the diaphragm 10
As shown in the figure, the operating rod 14 is pushed forward by a spring 12. For this reason, the actuator 6
The operating rod 14 holds the throttle valve 4 at a set opening from the idle opening.
暖機時の始動に際しては、スタータスイツチ２
８をONにすると、内燃機関のクランキングが開
始され、負圧切換弁２４に電源３２が接続され
る。負圧切換弁２４は、通電によつて負圧通路２
０の負圧ポート１８側を閉鎖し、負圧室８を大気
開口２６に連通する。したがつて、始動時には、
クランキングにより吸気通路２に生じた吸気通路
負圧を負圧室８に導入させず、大気圧を導入す
る。これにより、アクチユエータ６、作動杆１４
の前進により機関停止時と同時に、クランキング
中に絞り弁４を設定開度に保持することになり、
機関の吸入空気量を増加する。このため、暖機時
の始動の際には、パーコレーシヨンによるリツチ
な空燃比の混合気を点火可能な空燃比にまでリー
ン化し、点火性を改善して再始動性を向上するこ
とができる。 When starting after warming up, turn on starter switch 2.
8 is turned ON, cranking of the internal combustion engine is started, and the power source 32 is connected to the negative pressure switching valve 24. When the negative pressure switching valve 24 is energized, the negative pressure passage 2
The negative pressure port 18 side of 0 is closed, and the negative pressure chamber 8 is communicated with the atmospheric opening 26. Therefore, at startup,
The intake passage negative pressure generated in the intake passage 2 due to cranking is not introduced into the negative pressure chamber 8, but atmospheric pressure is introduced. As a result, the actuator 6, the operating rod 14
By advancing the throttle valve 4, the throttle valve 4 is held at the set opening at the same time as the engine is stopped and during cranking.
Increase the intake air amount of the engine. Therefore, when starting after warming up, the rich air-fuel mixture due to percolation is made lean to an ignitable air-fuel ratio, improving ignition performance and restartability. .
機関完爆後には、スタータスイツチ２８を
OFFにする。負圧切換弁２４は、スタータスイ
ツチ２８のOFFにより電源３２を遮断されて通
電を停止され、大気開口２６側を閉鎖し、負圧室
８と吸気通路２とを連通する。したがつて、負圧
室８には、機関の回転で生じた吸気通路負圧が導
入される。このため、アクチユエータ６は、機関
始動後に、この負圧によりダイヤフラム１０が第
３図に示す如くバネ１２を圧縮しつつ作動杆１４
を後退させるので、絞り弁４をアイドル開度に戻
して機関の回転を安定させることができる。 After the engine has completely exploded, turn off the starter switch 28.
Turn it off. When the starter switch 28 is turned OFF, the power supply 32 is cut off and the negative pressure switching valve 24 is de-energized, closes the atmospheric opening 26 side, and communicates the negative pressure chamber 8 with the intake passage 2. Therefore, the negative pressure in the intake passage generated by the rotation of the engine is introduced into the negative pressure chamber 8. Therefore, after the engine is started, the diaphragm 10 of the actuator 6 compresses the spring 12 as shown in FIG.
Since the throttle valve 4 is moved backward, the throttle valve 4 can be returned to the idle opening degree and the rotation of the engine can be stabilized.
冷機時の始動に際しては、スタータスイツチ２
８をONにすると、前述の如く、負圧切換弁２４
への通電により負圧室８と大気開口２６とが連通
し、アクチユエータ６の作動杆１４の前進により
絞り弁４を設定開度に保持している。このとき、
車室内温度が低く所定温度以下であると、感温ス
イツチ３０がONになる。この感温スイツチ３０
のONにより負圧切換弁２４は通電され、前述の
如く負圧ポート１８側を閉鎖し、負圧室８と大気
開口２６とを連通する。したがつて、冷機時に
は、機関完爆後にスタータスイツチ２８をOFF
にしても、感温スイツチ３０のONにより、負圧
切換弁２４に通電している。これにより、アクチ
ユエータ６は、機関始動後に、作動杆１４により
車室内温度が所定温度に達するまで、絞り弁４を
第２図に示す如く設定開度に保持する。このた
め、冷機時の暖機運転中にアイドルアツプし、機
関の早期復調を図りつつヒータのウオーム効果を
向上することができる。 When starting when the machine is cold, turn off starter switch 2.
When 8 is turned on, the negative pressure switching valve 24 is turned on as described above.
By energizing, the negative pressure chamber 8 and the atmosphere opening 26 are communicated with each other, and the throttle valve 4 is maintained at the set opening degree by advancing the operating rod 14 of the actuator 6. At this time,
When the temperature inside the vehicle is low and below a predetermined temperature, the temperature-sensitive switch 30 is turned on. This temperature-sensitive switch 30
When turned ON, the negative pressure switching valve 24 is energized, closes the negative pressure port 18 side as described above, and communicates the negative pressure chamber 8 with the atmospheric opening 26. Therefore, when the engine is cold, turn off the starter switch 28 after the engine has completely exploded.
However, when the temperature-sensitive switch 30 is turned on, the negative pressure switching valve 24 is energized. Thereby, after the engine is started, the actuator 6 holds the throttle valve 4 at the set opening degree as shown in FIG. 2 by the operating rod 14 until the temperature inside the vehicle reaches a predetermined temperature. Therefore, the idle is increased during warm-up operation when the engine is cold, and the warm effect of the heater can be improved while attempting early demodulation of the engine.
車室内温度が所定温度に達すると、感温スイツ
チ３０はOFFになるので、負圧切換弁２４への
通電が停止される。負圧切換弁２４は、通電の停
止により、アクチユエータ６の負圧室８に吸気通
路２の負圧を導入する。このため、アクチユエー
タ６は、前述の如く作動杆１４を後退させて絞り
弁４をアイドル開度に戻し、機関をアイドル回転
数に安定させる。 When the temperature inside the vehicle reaches a predetermined temperature, the temperature-sensitive switch 30 is turned off, so that the negative pressure switching valve 24 is de-energized. The negative pressure switching valve 24 introduces the negative pressure of the intake passage 2 into the negative pressure chamber 8 of the actuator 6 when the energization is stopped. Therefore, as described above, the actuator 6 moves the operating rod 14 backward to return the throttle valve 4 to the idle opening, thereby stabilizing the engine at the idle speed.
なお、感温スイツチ３０は、車室内温度に限ら
ず外気温度や機関温度を検知し、アクチユエータ
６により絞り弁４を設定開度に保持できるのはも
ちろんである。 It goes without saying that the temperature-sensitive switch 30 can detect not only the vehicle interior temperature but also the outside air temperature and the engine temperature, and can maintain the throttle valve 4 at a set opening degree using the actuator 6.
第４図は、この発明の第２実施例を示すもので
ある。この実施例において、上述第１実施例と同
一機能を果す箇所には同一符号を付して説明す
る。 FIG. 4 shows a second embodiment of the invention. In this embodiment, parts having the same functions as those in the first embodiment described above will be described with the same reference numerals.
第２実施例では、冷却水温度を検知する水温セ
ンサ３４と、機関の回転数を検知する回転数セン
サ３６と、絞り弁４の開度を検知する絞り弁開度
センサ３８とを設け、これら各センサの検知信号
を負圧切換弁２４に接続した制御部４０に入力し
ている。この制御部４０は、各センサからの信号
によりアクチユエータ６を動作すべく、所定温度
以下では負圧切換弁２４に通電し、所定温度以上
でかつ所定回転数を越えたとき、または所定温度
以上でかつ所定絞り弁開度より大きくなつたとき
には負圧切換弁２４への通電を停止する。 In the second embodiment, a water temperature sensor 34 that detects the cooling water temperature, a rotation speed sensor 36 that detects the engine speed, and a throttle valve opening sensor 38 that detects the opening of the throttle valve 4 are provided. Detection signals from each sensor are input to a control section 40 connected to the negative pressure switching valve 24. In order to operate the actuator 6 based on the signals from each sensor, the control unit 40 energizes the negative pressure switching valve 24 when the temperature is below a predetermined temperature, and when the temperature is above a predetermined temperature and exceeds a predetermined rotation speed, or when the temperature is above a predetermined temperature. When the opening degree of the throttle valve becomes larger than a predetermined opening degree, power supply to the negative pressure switching valve 24 is stopped.
この構成によれば、機関停止時に負圧切換弁２
４は通電されていないため、絞り弁４は第３図に
示す如くアイドル開度から開いた設定開度に保持
されている。 According to this configuration, when the engine is stopped, the negative pressure switching valve 2
Since the throttle valve 4 is not energized, the throttle valve 4 is maintained at the set opening from the idle opening as shown in FIG.
暖機時の始動においては、スタータスイツチ２
８をONにすると、負圧切換弁２４は通電されて
絞り弁４を第２図に示す設定開度に保持している
ので、クランキングによる機関の吸入空気量は増
加する。このため、リツチな混合気を点火可能な
空燃比の混合気にまでリーン化し、再始動性を向
上することができる。 For starting when warmed up, start switch 2
8 is turned ON, the negative pressure switching valve 24 is energized and the throttle valve 4 is held at the set opening shown in FIG. 2, so that the amount of air intake into the engine due to cranking increases. Therefore, the rich air-fuel mixture can be made lean to the air-fuel ratio that allows ignition, thereby improving restartability.
機関完爆後には、スタータスイツチ２８を
OFFにする。このとき、水温センサ３４は、内
燃機関が暖機状態であるので、所定温度以上であ
ることを検知して制御部４０に入力している。そ
こで、機関回転数が所定回転数を越えるか、絞り
弁４が所定開度よりも大きくなると、水温センサ
３４と絞り弁開度センサ３８との信号で、制御部
４０は負圧切換弁２４への通電を停止する。この
ため、機関始動後には、負圧室８と吸気通路２と
は連通し、導入された吸気通路負圧により作動杆
１４を後退させるので、絞り弁４は第３図に示す
如くアイドル開度に戻る。 After the engine has completely exploded, turn off the starter switch 28.
Turn it off. At this time, since the internal combustion engine is in a warm-up state, the water temperature sensor 34 detects that the temperature is higher than the predetermined temperature and inputs the detected temperature to the control unit 40 . Therefore, when the engine rotation speed exceeds a predetermined rotation speed or the throttle valve 4 becomes larger than a predetermined opening, the control unit 40 uses signals from the water temperature sensor 34 and the throttle valve opening sensor 38 to direct the control unit 40 to the negative pressure switching valve 24. energization is stopped. Therefore, after the engine is started, the negative pressure chamber 8 and the intake passage 2 communicate with each other, and the introduced intake passage negative pressure causes the operating rod 14 to retreat, so that the throttle valve 4 is opened at the idle opening as shown in FIG. Return to
冷機時の始動においては、水温センサ３４は所
定温度以下であることを検知して制御部４０に入
力するので、スタータスイツチ２８をOFFにし
ても制御部４０により負圧切換弁２４は通電され
る。このため、クランキング後の機関稼働時にお
いても、絞り弁４は第２図に示す設定開度に保持
され、冷機時の暖機運転中にアイドルアツプし、
機関の早期復調を図りつつヒータのウオーム効果
を向上することができる。 When starting a cold engine, the water temperature sensor 34 detects that the temperature is below a predetermined temperature and inputs the information to the control unit 40, so even if the starter switch 28 is turned off, the negative pressure switching valve 24 is energized by the control unit 40. . Therefore, even when the engine is running after cranking, the throttle valve 4 is maintained at the set opening shown in FIG.
It is possible to improve the warm effect of the heater while achieving early demodulation of the engine.
冷却水温度が上昇して所定温度以上になつたと
きに、機関回転数が所定回転数を越えるか、絞り
弁４が所定開度よりも大きくなると、水温センサ
３４と回転数センサ３６とからの信号で、または
水温センサ３４と絞り弁開度センサ３８とからの
信号で、制御部４０は負圧切換弁２４への通電を
停止する。このため、アクチユエータ６の負圧室
８に吸気通路２の負圧が導入され、絞り弁４は第
３図に示す如くアイドル開度に戻り、機関をアイ
ドル回転数に安定させる。 When the cooling water temperature rises to a predetermined temperature or higher and the engine speed exceeds the predetermined rotation speed or the throttle valve 4 becomes larger than the predetermined opening, the water temperature sensor 34 and the rotation speed sensor 36 In response to the signal or signals from the water temperature sensor 34 and the throttle valve opening sensor 38, the control unit 40 stops energizing the negative pressure switching valve 24. Therefore, the negative pressure of the intake passage 2 is introduced into the negative pressure chamber 8 of the actuator 6, the throttle valve 4 returns to the idle opening as shown in FIG. 3, and the engine is stabilized at the idle speed.
なお、この第２実施例において、水温センサ３
４および絞り弁開度センサ３８は、それぞれ所定
温度以下および所定開度以下でONになるスイツ
チとすることもできる。また、制御部４０は、気
化器の燃料流量を制御すべく設けたセンサや制御
部等を利用することができ、部品点数を少なくし
て構造を簡単にすることができる。さらに、検知
信号値の設定・組合わせ等により、様々に動作条
件を設定することが可能になる。 Note that in this second embodiment, the water temperature sensor 3
4 and the throttle valve opening sensor 38 may be switches that turn on at a predetermined temperature or lower and a predetermined opening or lower, respectively. Further, the control section 40 can utilize a sensor, a control section, etc. provided to control the fuel flow rate of the carburetor, and the number of parts can be reduced and the structure can be simplified. Furthermore, various operating conditions can be set by setting and combining detection signal values.
［発明の効果］
このように、この発明によれば、内燃機関の暖
機時の始動の際には、クランキング中にアクチユ
エータにより絞り弁をアイドル開度から開放側の
設定開度位置に保持することができる。このた
め、吸入空気量を増加して濃混合気の空燃比を点
火可能な空燃比までリーン化し得て、点火性を改
善して暖機時の再始動性を向上することができ
る。また、機関始動後に、車室内温度が低く、所
定温度以下であるときは、所定温度に達するまで
アクチユエータにより絞り弁を設定開度位置に保
持することができる。このため、冷機時の暖機運
転中にアイドルアツプし得て、機関の早期復調を
図りつつ、ヒータのウオーム効果を向上すること
ができる。しかも、前述両機能を一つのアクチユ
エータを作動させて果たすことができるので、構
造が簡単になり、コストを低減し得る。さらに、
機関停止時には、アクチユエータで絞り弁を設定
開度位置に保持しておき、機関始動後の吸気通路
負圧で絞り弁をアイドル開度に戻すべくアクチユ
エータを作動させるので、作動が確実である。[Effect of the Invention] As described above, according to the present invention, when starting the internal combustion engine when it is warmed up, the actuator holds the throttle valve at the set opening position on the open side from the idle opening during cranking. can do. Therefore, the amount of intake air can be increased to lean the air-fuel ratio of the rich air-fuel mixture to an ignitable air-fuel ratio, thereby improving ignition performance and restartability during warm-up. Further, after the engine is started, when the temperature inside the vehicle is low and is below a predetermined temperature, the throttle valve can be held at the set opening position by the actuator until the predetermined temperature is reached. Therefore, the idle can be increased during warm-up operation when the engine is cold, and the warm effect of the heater can be improved while attempting to demodulate the engine early. Moreover, since both of the above-mentioned functions can be performed by operating one actuator, the structure can be simplified and costs can be reduced. moreover,
When the engine is stopped, the actuator holds the throttle valve at the set opening position, and after the engine is started, the actuator is operated to return the throttle valve to the idle opening using the negative pressure in the intake passage, so the operation is reliable.
第１図はこの発明による内燃機関の再始動装置
の実施例を示す概略断面図、第２〜３図はそれぞ
れアクチユエータの動作状態を示す概略断面図、
第４図は第２実施例を示す概略断面図である。
図において、４は絞り弁、６はアクチユエー
タ、８は負圧室、１４は作動杆、２０は負圧通
路、２４は負圧切換弁、２８はスタータスイツ
チ、３０は感温センサ、３８は絞り弁開度セン
サ、４０は制御部である。
FIG. 1 is a schematic sectional view showing an embodiment of the restart device for an internal combustion engine according to the present invention, and FIGS. 2 and 3 are schematic sectional views showing the operating state of the actuator, respectively.
FIG. 4 is a schematic sectional view showing the second embodiment. In the figure, 4 is a throttle valve, 6 is an actuator, 8 is a negative pressure chamber, 14 is an operating rod, 20 is a negative pressure passage, 24 is a negative pressure switching valve, 28 is a starter switch, 30 is a temperature sensor, and 38 is a throttle The valve opening sensor 40 is a control section.
Claims (1)
開放側の設定開度に保持するアクチユエータを設
け、このアクチユエータには吸気通路負圧の導入
により前記絞り弁を閉鎖方向に作動させて前記ア
イドル開度に閉動させるとともに大気圧の導入に
より前記絞り弁を開放方向に作動させて前記設定
開度に開動させる負圧室を設け、この負圧室と前
記絞り弁の下流側吸気通路とを負圧通路で連通
し、この負圧通路の途中には通電により前記負圧
室と大気とを連通するとともに通電の停止により
前記負圧室と吸気通路とを連通する制御弁を設
け、この制御弁と電源との間には始動時にONに
なるスタータスイツチと車室内温度が所定温度以
下でONになる感温スイツチとを並列に接続して
設けたことを特徴とする内燃機関の再始動装置。1. An actuator is provided that maintains a carburetor throttle valve of an internal combustion engine from an idle opening to a set opening on the open side, and this actuator operates the throttle valve in the closing direction by introducing negative pressure in the intake passage, thereby increasing the idle opening. A negative pressure chamber is provided which operates the throttle valve in the opening direction and opens it to the set opening degree by introducing atmospheric pressure, and the negative pressure chamber and the intake passage downstream of the throttle valve are connected to each other. A control valve is provided in the middle of the negative pressure passage, which communicates the negative pressure chamber with the atmosphere when energized, and communicates the negative pressure chamber with the intake passage when the energization is stopped. A restart device for an internal combustion engine, characterized in that a starter switch that is turned on at the time of starting and a temperature-sensitive switch that is turned on when the vehicle interior temperature is below a predetermined temperature are connected in parallel between the and the power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15969083A JPS6050233A (en) | 1983-08-31 | 1983-08-31 | Restarting device for internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15969083A JPS6050233A (en) | 1983-08-31 | 1983-08-31 | Restarting device for internal-combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6050233A JPS6050233A (en) | 1985-03-19 |
| JPH0519021B2 true JPH0519021B2 (en) | 1993-03-15 |
Family
ID=15699186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15969083A Granted JPS6050233A (en) | 1983-08-31 | 1983-08-31 | Restarting device for internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050233A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5292022A (en) * | 1976-01-28 | 1977-08-03 | Toyota Motor Corp | Device to keep minimum opening of throttle valve in carburetter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6027792Y2 (en) * | 1980-04-22 | 1985-08-22 | トヨタ自動車株式会社 | Throttle valve opening control device |
| JPS57107927U (en) * | 1980-12-23 | 1982-07-03 |
-
1983
- 1983-08-31 JP JP15969083A patent/JPS6050233A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5292022A (en) * | 1976-01-28 | 1977-08-03 | Toyota Motor Corp | Device to keep minimum opening of throttle valve in carburetter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6050233A (en) | 1985-03-19 |
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