JPS605783B2 - Engine intake air heating device - Google Patents

Description

【発明の詳細な説明】 本発明は自動車用その他のエンジンにおける吸気、即ち
吸入混合気の加熱装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for heating intake air, that is, an intake air-fuel mixture, in automobile and other engines.

従来この種装置として、エンジンの吸気通路の下面の加
熱室内に該エンジンの排気通路内の排気或は該エンジン
の冷却水を導く式のものは知られるが、これらは次のよ
うな不都合を伴う。Conventionally, this type of device is known to introduce exhaust gas in the exhaust passage of the engine or cooling water of the engine into a heating chamber on the lower surface of the intake passage of the engine, but these devices have the following disadvantages. .

即ち排気熱によるものでは、エンジンの始動に際しその
直後に排気が高温となるので吸気は直ちに温度上昇され
て好ましいが、該エンジンの暖気の完了後は排気の高温
により吸気が過熱され勝ちである不都合を伴い、更に冷
却水熱によるものでは、水温が約８０ｑｏ近くに存する
ので過熱の不都合はないが、腰機時の水温の上昇が遅い
のでその時の吸気加熱が不足となる不都合を伴う。本発
明はか）る不都合のない装置を得ることをその目的とし
たもので、エンジンの吸気通路と排気通路との間に、一
端の加熱部を該排気通路と、池端の放熱部を該吸気通路
とに露出させてヒートパイプを設け、該ヒートパイプの
真空室を放熱部側において長手に延長して冷却部に構成
させると共に、該真空室内の媒体を小量にして該真空室
内にアルゴンガス等媒体より軽量のガスを収容したこと
を特徴とする。That is, in the case of using exhaust heat, the temperature of the intake air is increased immediately when the engine is started, so the temperature of the intake air is immediately increased, which is preferable.However, after the engine has been warmed up, the intake air tends to be overheated due to the high temperature of the exhaust, which is disadvantageous. In addition, in the case of using cooling water heat, the water temperature is around 80 qo, so there is no problem of overheating, but since the water temperature rises slowly during waist flight, there is a problem that the intake air heating at that time is insufficient. The object of the present invention is to obtain a device that does not have the above disadvantages, and between the intake passage and exhaust passage of an engine, a heating part at one end is connected to the exhaust passage, and a heat dissipation part at the end is connected to the intake passage. A heat pipe is provided exposed in the passageway, and the vacuum chamber of the heat pipe is extended longitudinally on the heat radiation part side to form a cooling part, and the medium in the vacuum chamber is reduced to a small amount to inject argon gas into the vacuum chamber. It is characterized by containing a gas that is lighter than an equivalent medium.

本発明の実施例を別紙図面に付説明する。Embodiments of the present invention will be described with reference to the attached drawings.

図面で１はエンジンの吸気通路、２は該エンジンの排気
通路を示し、両遍路１，２間に一端の加熱部３を該排気
通路２と、池端の放熱部４を該吸気速路１とに露出させ
てヒートパイプ５を設ける。In the drawings, 1 indicates the intake passage of the engine, and 2 indicates the exhaust passage of the engine. Between both pilgrims 1 and 2, the heating part 3 at one end is connected to the exhaust passage 2, and the heat dissipation part 4 at the end is connected to the intake passage 1. The heat pipe 5 is provided so as to be exposed to the heat pipe 5.

該ヒートパイプ５はそれ自体公知のように内部の真空室
６内に水、アルコール、ナトリウムその他の媒体７の少
量を収容して成るもので加熱部３の加熱によれば該媒体
７は遠かに気化して放熱部４に移動してそこで熱エネル
ギーを放出し、液体に変って該室６内を該加熱部３側に
戻ることが繰返されるものである。尚、該ヒートパイプ
５は外周のフランジ８において上下のシール部材９，９
を介して前記した両遍路１，２の互に対向する壁面間に
挟持されるものとする。尚、該パイプ５は例えば第２図
示のように内部の真空室６を上下の２室に区別し、その
一方に媒体７として例えば水、その他方に媒体７として
例えばナトリウムを収容する型式とすることも差支えな
い。更に本発明によれば該ヒートパイプ５を第３図に明
示するように伝熱量が加熱部３の予定の高温度で飽和す
る特性を有すると共に飽和点の熱量が該エンジンの低負
圧運転時に要求される吸気加熱量に略合致する型式に設
計されるもので、その手段としては例えば次のようなも
のが考えられる。As is known per se, the heat pipe 5 is constructed by containing a small amount of water, alcohol, sodium, or other medium 7 in an internal vacuum chamber 6, and when heated by the heating section 3, the medium 7 is heated far away. It vaporizes, moves to the heat radiation section 4, releases thermal energy there, turns into a liquid, and returns to the heating section 3 side within the chamber 6, which is repeated. Note that the heat pipe 5 has upper and lower seal members 9, 9 at the outer periphery flange 8.
It is assumed that it is sandwiched between the mutually opposing wall surfaces of both the pilgrims 1 and 2 mentioned above. The pipe 5 is of a type in which the internal vacuum chamber 6 is divided into two upper and lower chambers as shown in the second diagram, and one of the chambers stores a medium 7, such as water, and the other one stores a medium 7, such as sodium. There is no problem with that. Furthermore, according to the present invention, the heat pipe 5 has a characteristic that the amount of heat transferred is saturated at the predetermined high temperature of the heating section 3, as shown in FIG. It is designed to approximately match the required intake air heating amount, and the following methods can be considered as means for this purpose, for example.

即ち第１の手段としては前記した真空室６内に収容され
る媒体７の量を予定の少量とするもので、伝熱量は該媒
体７の気化熱分に自動的に制限されて所定の目的が達成
される。第２の手段としては例えば第４図示のように前
記した真空室６を放熱部４側において長手に延長してそ
の延長端を外周のジャケット１０内の水その他で冷却さ
れる冷却部１１に構成すると共に該室６内にアルゴンガ
ス１２を収容して常時は該冷却部１１が該アルゴンガス
１２で被覆されるようにするもので、かくて加熱部３が
少し〈加熱される間は、媒体７の少量のみが気化しアル
ゴンガス１２はそれにより少許圧縮されるのみで冷却部
１１は該媒体７と接触することがなく、従って加熱部３
に加えられる熱量はそのま）放熱部４に伝達されて放出
されるが、次で該加熱部３が大きく加熱されるときは媒
体７が大量に気化して該アルゴンガス１２がこれにより
大きく圧縮され冷却部１１がそれに応じて露出し、かく
て余分の熱量はこれに吸収されるようにした。このよう
に本発明によるときは、一端の加熱部と他端の放熱部と
をそれぞれ排気通路と吸気通路とに露出させて設けたヒ
ートパイプには、その真空室を放熱部側において長手に
延長して冷却部に構成させると共に、その真空室内の媒
体を小量にしてその室内にアルゴンガス等媒体より軽量
のガスを収容したものであるからヒートパイプの伝熱量
が飽和特性を有すると共に飽和点の伝熱量が、エンジン
の低負荷運転時に要求される吸気加熱量に略合致する型
式とすることができ、かくてエンジンの始動直後に高温
となる排気の熱をそのま）吸気加熱に利用し得て腰機中
の吸気加熱を良好にすると共に前記した飽和特性により
暖機完了後の過熱を有効に防止し得られ、更に飽和点の
伝熱量は前記したように該エンジンの低負荷運転に際し
吸気温度は比較的低温となり、エンジンの吸気効率を向
上して出力を増大させ得る等の効果を有する。That is, as a first means, the amount of the medium 7 accommodated in the vacuum chamber 6 is set to a predetermined small amount, and the amount of heat transfer is automatically limited to the heat of vaporization of the medium 7 to meet the predetermined purpose. is achieved. As a second means, for example, as shown in the fourth figure, the above-mentioned vacuum chamber 6 is extended longitudinally on the side of the heat radiation part 4, and the extended end is configured as a cooling part 11 that is cooled by water or other water in a jacket 10 on the outer periphery. At the same time, argon gas 12 is contained in the chamber 6 so that the cooling section 11 is always covered with the argon gas 12, so that the heating section 3 is slightly heated. Only a small amount of the medium 7 is vaporized and the argon gas 12 is thereby only slightly compressed, and the cooling section 11 does not come into contact with said medium 7, so that the heating section 3
The amount of heat added to the argon gas is directly transferred to the heat dissipation section 4 and released, but next time when the heating section 3 is greatly heated, a large amount of the medium 7 is vaporized and the argon gas 12 is thereby greatly compressed. The cooling part 11 is exposed accordingly, so that the excess heat is absorbed therein. According to the present invention, the heat pipe has a heating section at one end and a heat dissipating section at the other end exposed to the exhaust passage and the intake passage, respectively, with the vacuum chamber extending longitudinally on the heat dissipating section side. At the same time, the amount of medium in the vacuum chamber is reduced and a gas lighter than the medium, such as argon gas, is stored in the chamber, so the heat transfer amount of the heat pipe has a saturation characteristic and the saturation point The heat transfer amount can be made into a type that almost matches the amount of intake air heating required during low-load operation of the engine, and in this way, the heat of the exhaust gas, which becomes high temperature immediately after the engine starts, can be directly used for intake air heating. This makes it possible to improve intake air heating in the engine and effectively prevent overheating after warm-up due to the above-mentioned saturation characteristics.Furthermore, as mentioned above, the amount of heat transfer at the saturation point is reduced during low-load operation of the engine. The intake air temperature becomes relatively low, which has the effect of improving the intake efficiency of the engine and increasing the output.

図両の簡単な説明第１図は本発明装置の１例の裁断側面
図、第２図はその変形例の裁断側面図「第３図はヒート
パイプの特性線図、第４図かヒートパイプの変形例の線
図である。Brief explanation of both figures: Figure 1 is a cut side view of one example of the device of the present invention, Figure 2 is a cut side view of a modified example thereof, Figure 3 is a characteristic diagram of a heat pipe, and Figure 4 is a heat pipe. It is a diagram of a modification of .

１・…・・吸気通路、２・…・・排気通路、３・・・肌
加熱部、４・・・・・・放熱部、５・…・・ヒートパイ
プ。1... Intake passage, 2... Exhaust passage, 3... Skin heating section, 4... Heat radiation section, 5... Heat pipe.

第１図第２図 第３図 第４図Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

【特許請求の範囲】[Claims] １ エンジンの吸気通路と排気通路との間に、一端の加
熱部を、該排気通路と、他端の放熱部を該吸気通路とに
露出させてヒートパイプを設け、該ヒートパイプの真空
室を放熱部側において長手に延長して冷却部に構成させ
ると共に、該真空室内の媒体を小量にして該真空室内に
アルゴンガス等媒体より軽量のガスを収容したことを特
徴とするエンジンの吸気加熱装置。1. A heat pipe is provided between an intake passage and an exhaust passage of an engine, with a heating part at one end exposed to the exhaust passage and a heat radiation part at the other end exposed to the intake passage, and a vacuum chamber of the heat pipe is Intake air heating for an engine, characterized in that the heat dissipation part side is extended longitudinally to form a cooling part, and the volume of the medium in the vacuum chamber is reduced to accommodate a gas lighter than the medium, such as argon gas, in the vacuum chamber. Device.