JPS5919804Y2 - Internal combustion engine intake preheating device - Google Patents
Internal combustion engine intake preheating deviceInfo
- Publication number
- JPS5919804Y2 JPS5919804Y2 JP15065679U JP15065679U JPS5919804Y2 JP S5919804 Y2 JPS5919804 Y2 JP S5919804Y2 JP 15065679 U JP15065679 U JP 15065679U JP 15065679 U JP15065679 U JP 15065679U JP S5919804 Y2 JPS5919804 Y2 JP S5919804Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- passage
- temperature
- negative pressure
- intake
- 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
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】
本考案は内熱機関の吸気予熱装置に係り、とくに予熱空
気の制御手段を改良した吸気予熱装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intake air preheating device for an internal heat engine, and more particularly to an intake air preheating device with an improved control means for preheating air.
従来、内燃機関の吸気予熱装置として、新気の吸入口を
有するエアクリーナ内の空気通路に予熱空気通路を連通
させ、この予熱空気通路の開度を制御する制御弁に負圧
作動体を連結し、この負圧作動体の負圧室を負圧通路に
よって吸入管と連通させ、新気と予熱空気との混合吸気
温度を感知し感知温度の高温側で開度が増大する温度制
御弁を介して前記負圧通路を大気側と連通させることに
より、新気と予熱空気との混合吸気温度が所定温度にな
るように予熱空気の吸入量を制御するものが用いられて
いる。Conventionally, as an intake air preheating device for an internal combustion engine, a preheating air passage is connected to an air passage in an air cleaner having a fresh air intake port, and a negative pressure operating body is connected to a control valve that controls the opening degree of the preheating air passage. The negative pressure chamber of this negative pressure actuator is communicated with the suction pipe through a negative pressure passage, and a temperature control valve that senses the temperature of the mixed intake air of fresh air and preheated air and increases its opening on the high temperature side of the sensed temperature. The negative pressure passage is communicated with the atmosphere to control the intake amount of preheated air so that the temperature of the mixed intake air of fresh air and preheated air reaches a predetermined temperature.
この種の先行技術としては、例えば特開昭４８−３３２
１６号公報、特開昭５０−４３３１２号公報に記載のも
のが知られている。As this type of prior art, for example, Japanese Patent Application Laid-Open No. 48-332
16 and JP-A-50-43312 are known.
しかし、この吸気予熱装置では、前記温度制御弁だけで
予熱空気の吸入量を制御していたので、機関の運転条件
によっては吸気温度が適正になるように制御することが
困難であった。However, in this intake air preheating device, since the intake amount of preheated air is controlled only by the temperature control valve, it is difficult to control the intake air temperature to be appropriate depending on the operating conditions of the engine.
本考案は、前述した事情に鑑みてなされたもので、外気
温度に対し確実に応答できるようにし、かつ機関の暖機
中などのアイドリング運転時には吸気温度を比較的高く
保つことにより、機関の運転条件に合せて適正な吸気温
度の制御ができ、これによって安定しかつすぐれた燃費
特性と機関の作動特性とが得られる内燃機関の吸気予熱
装置を提供することを目的とするものである。The present invention was developed in view of the above-mentioned circumstances, and it enables engine operation by ensuring a reliable response to outside air temperature and by keeping the intake air temperature relatively high during idling operation such as during warm-up of the engine. It is an object of the present invention to provide an intake air preheating device for an internal combustion engine that can appropriately control intake air temperature according to conditions and thereby provide stable and excellent fuel efficiency and engine operating characteristics.
この目的を達成するために、本考案は、前述したような
内燃機関の吸気予熱装置においては、負圧作動体の負圧
通路の大気側との連通部より吸入管側に外気温度の低温
時にだけ開く外気温感知弁を設けると共に、負圧通路の
大気側との連通部と外気温感知弁との間の部分を、気化
器の吸入通路のスロットル弁アイドリング開度直下流部
と連通させたものである。In order to achieve this objective, the present invention provides an air intake preheating device for an internal combustion engine as described above, in which the negative pressure passage of the negative pressure actuator is connected to the suction pipe side from the communication part with the atmosphere side when the outside air temperature is low. In addition to providing an outside temperature sensing valve that opens only when the negative pressure passage is open, the part between the communication part of the negative pressure passage with the atmosphere side and the outside temperature sensing valve is made to communicate with the part immediately downstream of the throttle valve idling opening of the intake passage of the carburetor. It is something.
以下、図面を参照して本考案の一実施例を具体的に説明
する。Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.
図において、符号１は内燃機関本体、２は吸入系、３は
排気管であり、吸入系２はエアクリーナ４、気化器５お
よび吸入マニホールド６を有している。In the figure, reference numeral 1 is an internal combustion engine main body, 2 is an intake system, and 3 is an exhaust pipe, and the intake system 2 includes an air cleaner 4, a carburetor 5, and an intake manifold 6.
排気管３の上流側端部の外周側を管体で覆って熱交換器
７が設けられ、この熱交換器７と連通ずる予熱空気通路
８がエアクリーナ４内のフィルタエレメント９と新気の
吸入口１０との間に形成された空気通路１１に開口され
、予熱空気通路８の前記開口部の開度を制御する制御弁
１２が前記空気通路１１内に設けられている。A heat exchanger 7 is provided by covering the outer circumferential side of the upstream end of the exhaust pipe 3 with a pipe body, and a preheating air passage 8 communicating with the heat exchanger 7 is connected to a filter element 9 in the air cleaner 4 and intake of fresh air. A control valve 12 is provided in the air passage 11, which opens into the air passage 11 formed between the preheating air passage 8 and the opening 10, and controls the degree of opening of the opening of the preheating air passage 8.
前記制御弁１２が負圧作動体１３の操作杆１４と連結さ
れ、負圧作動体１３はスプリング１５の背圧を持ったダ
イヤフラム１６に前記操作杆１４が連結され、ダイヤフ
ラム１６がスプリング１５の背圧に抗し負圧室１７内の
負圧によって作動するように構成されている。The control valve 12 is connected to an operating rod 14 of a negative pressure actuating body 13, and the operating rod 14 of the negative pressure actuating body 13 is connected to a diaphragm 16 which has a back pressure of a spring 15. It is configured to operate by the negative pressure in the negative pressure chamber 17 against the pressure.
前記負圧室１７は負圧通路１８によって吸入マニホール
ド６と連通され、負圧通路１８はリーク通路１９によっ
てエアクリーナ４内のフィルタエレメント９より下流側
と連通され、前記リーク通路１９の負圧通路１８への開
口部には温度制御弁２０が設けられている。The negative pressure chamber 17 is communicated with the suction manifold 6 through a negative pressure passage 18, and the negative pressure passage 18 is communicated with the downstream side of the filter element 9 in the air cleaner 4 through a leak passage 19. A temperature control valve 20 is provided at the opening to.
この温度制御弁２０は気化器５の吸入通路２１のエアク
リーナ４に近い上流部にサーモワックス、バイメタルな
どを備えた温度感知体２２が臨ませられ、この感知体２
２が前記吸入通路２１を通る吸気温度を感知してこの温
度の高温側でリーク通路１９の開度を増大させるように
構成されている。This temperature control valve 20 has a temperature sensing body 22 equipped with thermowax, bimetal, etc. facing upstream of the suction passage 21 of the vaporizer 5 near the air cleaner 4.
2 is configured to sense the temperature of the intake air passing through the intake passage 21 and increase the opening degree of the leak passage 19 on the high temperature side.
前記負圧通路１８のリーク通路１９より吸入マニホール
ド６側に第２の負圧通路２３が連通され、この通路２３
には絞り２４が設けられ、また第２の負圧通路２３は気
化器５の吸入通路２１にスロツｌ−ル弁２５アイドリン
グ開度直下流部に位置して開口されている。A second negative pressure passage 23 is connected to the suction manifold 6 side from the leak passage 19 of the negative pressure passage 18, and this passage 23
is provided with a throttle 24, and a second negative pressure passage 23 opens into the suction passage 21 of the carburetor 5 at a position immediately downstream of the throttle valve 25 at the idling opening.
負圧通路１８の第２の負圧通路２３との連通部より吸入
マニホールド６側には外気温度を感知してこの温度の低
温時にだけ開く外気温感知弁２６が設けられている。An outside temperature sensing valve 26 that senses the outside air temperature and opens only when this temperature is low is provided on the side of the suction manifold 6 from the communication portion of the negative pressure passage 18 with the second negative pressure passage 23.
なお、この外気温感知弁２６は、サーモワックス、バイ
メタルなどを備えた温度感知体２７によって開閉作動さ
れるものである。The outside temperature sensing valve 26 is opened and closed by a temperature sensing body 27 made of thermowax, bimetal, or the like.
また、図中符号２８は予熱空気吸入口である。Further, reference numeral 28 in the figure is a preheated air intake port.
次に、以上のように構成された吸気予熱装置の作動につ
いて説明する。Next, the operation of the intake air preheating device configured as above will be explained.
外気温度が外気温感知弁２６の設定温度（例えば１０°
Ｃまたは２０°Ｃ）より低い場合には、前記外気温感知
弁２６が負圧通路１８を開き、吸入通路２１を通る吸気
温度が温度制御弁２０の設定温度より低い場合にはこの
温度制御弁２０がリーク通路１９を閉じているので、吸
入マニホールド６の吸入負圧が負圧作動体１３の負圧室
１７に負圧通路１８を介して作用し、負圧作動体１３の
作動により制御弁１２が予熱空気通路８を開いている。If the outside air temperature is the set temperature of the outside temperature sensing valve 26 (for example, 10°
C or 20°C), the outside temperature sensing valve 26 opens the negative pressure passage 18, and when the temperature of the intake air passing through the intake passage 21 is lower than the set temperature of the temperature control valve 20, this temperature control valve opens. 20 closes the leak passage 19, the suction negative pressure of the suction manifold 6 acts on the negative pressure chamber 17 of the negative pressure actuator 13 via the negative pressure passage 18, and the control valve is closed by the operation of the negative pressure actuator 13. 12 opens the preheating air passage 8.
このため、予熱空気吸入口２８から吸入された外気また
はエンジン室内の空気が熱交換器７で加熱されて暖気と
なり、この暖気が予熱空気通路８を経てエアクリーナ４
内の空気通路１１内に吸入され、その吸入口１０から直
接吸入された外気またはエンジン室内の空気である新気
と混合される。Therefore, the outside air or the air in the engine room sucked in from the preheated air intake port 28 is heated by the heat exchanger 7 and becomes warm air, and this warm air passes through the preheated air passage 8 and enters the air cleaner 4.
The air is sucked into the air passage 11 inside the engine and mixed with fresh air, which is outside air or air inside the engine room, which is directly sucked in through the intake port 10.
暖気すなわち予熱空気と、これより低温の新気とが混合
された吸気は、フィルタニレメン１〜９を経て気化器５
の吸入通路２１を経て、気化器５で燃料が供給されて混
合気となり、内燃機関本体１に吸入されて燃焼される。The intake air, which is a mixture of warm air, that is, preheated air, and fresh air at a lower temperature, passes through filter membranes 1 to 9 to the vaporizer 5.
Fuel is supplied to the carburetor 5 through the intake passage 21 to form an air-fuel mixture, which is sucked into the internal combustion engine main body 1 and combusted.
燃焼後の排気ガスは排気管３に排出され、熱交換器６を
通る空気を加熱した後、大気に放出される。The exhaust gas after combustion is discharged into the exhaust pipe 3, heats the air passing through the heat exchanger 6, and then is discharged into the atmosphere.
そして、気化器５の吸入通路２１内を通る新気と予熱空
気との混合吸気温度が温度制御弁２０の設定温度以上に
なると、この温度を温度感知体２２が感知して温度制御
弁２０が開き、前記吸気温度が高くなるに従ってその開
度を増大する。When the temperature of the mixed intake air of fresh air and preheated air passing through the intake passage 21 of the carburetor 5 exceeds the set temperature of the temperature control valve 20, the temperature sensor 22 senses this temperature and the temperature control valve 20 is activated. The opening degree increases as the intake air temperature increases.
このため、ノーク通路１９から負圧通路１８に空気が導
入され、負圧室１７の負圧が小さくなる。Therefore, air is introduced from the nok passage 19 into the negative pressure passage 18, and the negative pressure in the negative pressure chamber 17 becomes smaller.
従って負圧作動体１３が制御弁１２の開度を閉方向に制
御し、予熱空気通路８から吸入される暖気を減少させ、
またはその吸入をなくして、吸気温度が過度に高くなる
ことを防止する。Therefore, the negative pressure actuator 13 controls the opening degree of the control valve 12 in the closing direction to reduce the warm air sucked from the preheating air passage 8,
Or eliminate the intake to prevent the intake air temperature from becoming excessively high.
また、外気温度が外気温感知弁２６の設定温度より高く
なると、この感知弁２６によって負圧通路１８の吸入マ
ニホールド６との連通を遮断する。Furthermore, when the outside air temperature becomes higher than the set temperature of the outside temperature sensing valve 26, the sensing valve 26 cuts off communication between the negative pressure passage 18 and the suction manifold 6.
このため、負圧作動体１３の負圧室１７は第２の負圧通
路２３で気化器５の吸入通路２１とだけ連通されること
になる。Therefore, the negative pressure chamber 17 of the negative pressure operating body 13 is communicated only with the suction passage 21 of the carburetor 5 through the second negative pressure passage 23.
この場合に、外気温感知弁２６の設定温度より温度制御
弁２０の設定温度を高くしておけば、機関の暖機中など
のアイドリング運転時には、吸入通路２１の負圧が第２
の負圧通路２３より負圧室１７に作用するので、負圧作
動体１３によって制御弁１２が所要開度に予熱空気通路
８を開き、ある程度の予熱空気を新気に混合して吸入す
ることかできる。In this case, if the set temperature of the temperature control valve 20 is set higher than the set temperature of the outside temperature sensing valve 26, the negative pressure in the suction passage 21 will become
Since the negative pressure passage 23 acts on the negative pressure chamber 17, the control valve 12 opens the preheated air passage 8 to the required opening degree by the negative pressure operating body 13, and a certain amount of preheated air is mixed with fresh air and sucked. I can do it.
そして、スロットル弁２５の開度を増大させた機関の運
転時には、第２の負圧通路２３の開口がスロットル弁２
５の上流側になるため、負圧室１７がほぼ大気圧となり
、負圧作動体１３を介して制御弁１２で予熱空気通路８
を閉じ、予熱空気を混合することなく新気だけを吸気と
して用いる。Then, when the engine is operated with the opening degree of the throttle valve 25 increased, the opening of the second negative pressure passage 23 is opened to the throttle valve 25.
5, the negative pressure chamber 17 becomes almost atmospheric pressure, and the preheating air passage 8 is heated by the control valve 12 via the negative pressure actuator 13.
is closed and only fresh air is used as intake air without mixing preheated air.
なお、外気温度が温度制御弁２０の設定温度よりも高い
場合には、この弁２０がリーク通路１９を開き、この通
路１９から負圧室１７に空気が導入されるので、制御弁
１２が予熱空気通路８を閉じ、新気だけを吸気として用
いることになる。Note that when the outside air temperature is higher than the set temperature of the temperature control valve 20, this valve 20 opens the leak passage 19, and air is introduced from this passage 19 into the negative pressure chamber 17, so that the control valve 12 is preheated. The air passage 8 is closed and only fresh air is used as intake air.
以上説明したように本考案による内燃機関の吸気予熱装
置は、新気と予熱空気との混合吸気温度を感知して、予
熱空気通路に設けた制御弁により予熱空気の吸入量を制
御するのに加えて、外気温度を感知してアイドリング運
転時以外の外気温度が所定温度より高い場合には予熱空
気の吸入が行なわれないようにし、また、アイドリング
運転時には、外気温度が前記所定温度以上の場合でも、
吸気温度が温度制御弁の設定温度より低ければ予熱空気
を新気に混合させて吸気温度を比較的高く保つことがで
きるので、外気温度に応じた予熱空気の制御ができ、暖
機特性を向上させることができる。As explained above, the intake preheating device for an internal combustion engine according to the present invention detects the temperature of the mixed intake air of fresh air and preheated air, and controls the intake amount of preheated air using the control valve provided in the preheated air passage. In addition, when the outside air temperature is detected and the outside air temperature is higher than a predetermined temperature other than during idling operation, preheated air is not sucked, and when the outside air temperature is above the predetermined temperature during idling operation, the preheated air is not sucked. but,
If the intake air temperature is lower than the set temperature of the temperature control valve, the preheated air can be mixed with fresh air to keep the intake air temperature relatively high, making it possible to control the preheated air according to the outside air temperature, improving warm-up characteristics. can be done.
従って、本考案の吸気予熱装置は機関の運転条件に応じ
た適正な温度の吸気を用いることができ、安定しかつす
ぐれた燃費特性と機関の作動性とが得られる効果がある
。Therefore, the intake air preheating device of the present invention can use intake air at an appropriate temperature depending on the operating conditions of the engine, and has the effect of providing stable and excellent fuel economy characteristics and engine operability.
なお、本考案において、新気と予熱空気との混合吸気温
度を感知して作動する温度制御弁の温度感知体を気化器
の吸入通路上流部に臨ませたことによりエアクリーナ内
では吸気温度分布が不均一であるため、温度感知体の取
付位置によってその感知温度が異なり気化器を通過する
吸気温度に温度差があるのに比べて、安定しかつ正確な
吸気温度を感知して温度制御弁を制御し、負圧作動体の
負圧を適確に調圧することができ、前述の効果をさらに
すぐれたものにすることができる。In addition, in this invention, the temperature sensor of the temperature control valve, which operates by sensing the mixed intake air temperature of fresh air and preheated air, faces the upstream part of the intake passage of the carburetor, so that the intake air temperature distribution inside the air cleaner is improved. Since the temperature is non-uniform, the detected temperature varies depending on the mounting position of the temperature sensor, and compared to the temperature difference in the intake air passing through the carburetor, the temperature control valve can be operated by sensing the intake air temperature stably and accurately. It is possible to control the negative pressure of the negative pressure operating body appropriately, and the above-mentioned effects can be further improved.
図は本考案の一実施例を示す構成説明図である。
１・・・・・・内燃機関本体、２・・・・・・吸入系、
３・・・・・・排気管、４・・・・・・エアクリーナ、
５・・・・・・気化器、６・・・・・・吸入マニホール
ド、７・・・・・・熱交換器、８・・・・・・予熱空気
通路、９・・・・・・フィルタエレメント、１０・・・
・・・吸入口、１１・・・・・・空気通路、１２・・・
・・・制御弁、１３・・・・・・負圧作動体、１４・・
・・・・操作杆、１５・・・・・・スプリング、１６・
・・・・・ダイヤフラム、１７・・・・・・負圧室、１
８・・・・・・負圧通路、１９・・・・・・リーク通路
、２０・・・・・・温度制御弁、２１・・・・・・吸入
通路、２２・・・・・・温度感知体、２３・・・・・・
第２の負圧通路、２４・・・・・・絞り、２５・・・・
・・スロットル弁、２６・・・・・・外気温感知弁、２
７・・・・・・温度感知体、２８・・・・・・予熱空気
吸入口。The figure is a configuration explanatory diagram showing an embodiment of the present invention. 1...Internal combustion engine main body, 2...Intake system,
3...exhaust pipe, 4...air cleaner,
5... Carburizer, 6... Suction manifold, 7... Heat exchanger, 8... Preheating air passage, 9... Filter Element, 10...
...Intake port, 11...Air passage, 12...
...Control valve, 13...Negative pressure actuating body, 14...
...Operating rod, 15...Spring, 16.
...Diaphragm, 17...Negative pressure chamber, 1
8...Negative pressure passage, 19...Leak passage, 20...Temperature control valve, 21...Suction passage, 22...Temperature Sensing body, 23...
Second negative pressure passage, 24... Throttle, 25...
...Throttle valve, 26...Outside temperature sensing valve, 2
7...Temperature sensor, 28...Preheated air intake port.
Claims (2)
に予熱空気通路を連通させ、この予熱空気通路の開度を
制御する制御弁に負圧作動体を連結し、この負圧作動体
の負圧室を負圧通路によって吸入管と連通させ、新気と
予熱空気との混合吸気温度を感知し感知温度の高温側で
開度が増大する温度制御弁を介して前記負圧通路を大気
側と連通させた内燃機関の吸気予熱装置において、前記
負圧通路の大気側との連通部より吸入管側に外気温度の
低温時にだけ開く外気温感知弁を設けると共に、負圧通
路の大気側との連通部と外気温感知弁との間の部分を、
気化器の吸入通路のスロットル弁アイドリング開度直下
流部と連通させたことを特徴とする内燃機関の吸気予熱
装置。(1) A preheated air passage is communicated with an air passage in an air cleaner having a fresh air intake port, and a negative pressure operating body is connected to a control valve that controls the opening degree of this preheated air passage. The negative pressure chamber is communicated with the suction pipe through a negative pressure passage, and the negative pressure passage is connected to the atmosphere through a temperature control valve that senses the temperature of the mixed intake air of fresh air and preheated air and increases its opening on the high temperature side of the sensed temperature. In an intake air preheating device for an internal combustion engine that communicates with the atmosphere side of the negative pressure passage, an outside temperature sensing valve that opens only when the outside air temperature is low is provided on the intake pipe side from the communication part with the atmosphere side of the negative pressure passage; The part between the communication part and the outside temperature sensing valve,
An intake air preheating device for an internal combustion engine, characterized in that the intake air preheating device for an internal combustion engine is connected to a portion immediately downstream of an idling opening of a throttle valve of an intake passage of a carburetor.
入通路上流部に臨ませた実用新案登録請求の範囲第１項
に記載した内燃機関の吸気予熱装置。(2) The intake air preheating device for an internal combustion engine as set forth in claim 1, wherein the temperature sensor for operating the temperature control valve faces the upstream side of the intake passage of the carburetor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15065679U JPS5919804Y2 (en) | 1979-10-30 | 1979-10-30 | Internal combustion engine intake preheating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15065679U JPS5919804Y2 (en) | 1979-10-30 | 1979-10-30 | Internal combustion engine intake preheating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5667357U JPS5667357U (en) | 1981-06-04 |
| JPS5919804Y2 true JPS5919804Y2 (en) | 1984-06-08 |
Family
ID=29381682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15065679U Expired JPS5919804Y2 (en) | 1979-10-30 | 1979-10-30 | Internal combustion engine intake preheating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5919804Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE440685B (en) * | 1982-12-03 | 1985-08-12 | Volvo Ab | DEVICE FOR THE CONTROL OF THE TEMPERATURE OF THE BUCKING AIR OF A COMBUSTION ENGINE |
-
1979
- 1979-10-30 JP JP15065679U patent/JPS5919804Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5667357U (en) | 1981-06-04 |
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