JPS59180049A - Apparatus for promoting warm-up of engine - Google Patents
Apparatus for promoting warm-up of engineInfo
- Publication number
- JPS59180049A JPS59180049A JP58054884A JP5488483A JPS59180049A JP S59180049 A JPS59180049 A JP S59180049A JP 58054884 A JP58054884 A JP 58054884A JP 5488483 A JP5488483 A JP 5488483A JP S59180049 A JPS59180049 A JP S59180049A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- engine
- bypass
- intake air
- air
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
本発明は、エンジンの暖機促進装置に係り、特に直噴式
ディーゼルエンジンの始動性の向上と暖桟性能の向上を
図ったエンジンの暖機促進装ｋに関する。
従来、Ｗ噴式のディーゼルエンジンにおいては、燃焼室
の冷却面積が小さく始動が容易であるため、始動時用の
予熱栓、を備えていないのが一般ある。The present invention relates to an engine warm-up promotion device, and more particularly to an engine warm-up promotion device k that aims to improve startability and warm-up performance of a direct injection diesel engine. Conventionally, W-injection type diesel engines are generally not equipped with a preheating plug for starting, since the cooling area of the combustion chamber is small and starting is easy.
【か１ながら冬季の寒冷時においては、大型エンジンに
なると、始動が容易でなく、このため吸気管にエアイン
テークヒータを配設してクランキング前に約３０秒間該
ヒータに通電して吸気温度を上昇させてからエンジンを
始動するようにしていた。しかし極寒時、例えば外気温
が一２０°Ｃ以下になると該ヒータで吸気温を上昇させ
てもなおエンジンが順調に始動しない傾向があり、この
ため排気ブレーキを作動状態にしてクランキングを行っ
たり、燃料中に特殊添加剤を混合する等のことが行われ
、始動操作が騒音を伴なったり面倒であるという不具合
があった。
本発明は、上記した従来技術の欠点を除くためになされ
たものであって、その目的とするところは、吸気管から
排気管に連通ずるバイパスを設け、エンジンの始動時及
び暖機運転時にはこのバイパス内に吸気の一部を流入さ
せて排気管内に吐出することで、一方では吸気側の圧力
を低下させて吸入空気筆を減少させて吸気の温度上昇を
容易にし、他方では排気管内にバイパスからの空気を流
入盲せて対流を起こさせて背圧を上昇させ、排気の一部
をエンジン内に外音させて燃焼室内の温度上昇を促進さ
せることであり、またこれによってエンジン、特に直噴
式のディーゼルエンジンの始動性の向上と暖機性能の向
上を図り、始動操作を容易化することである。
要するに本発明は、吸気管から分岐し排気管に連通接続
されたバイパスと、該バイパスと前記吸気管との分岐点
付近に配設されたバイパス開閉弁と、該バイパス内に前
記吸気管内の空気を流入させるよう如した送風機とを備
えたことを特徴とするものである。
以下本発明を図面に示す実施例に基いて説明する。本発
明に係るエンジンの暖機促進装置１は、バイパス２と、
バイパス開閉弁３と、送風機４とを備えている。
エンジン５のインテークマニホールド６付近において、
バイパス２が吸気管８がら分岐しており、該バイパスは
排気マニホールド９付近において、排気管１０に連通接
続されている。
バイパス開閉弁３は、バイパス２と吸気管８との分岐点
８ａ付近に配設されている。
送風機４け、モータ１１と軸流ファン１２とからなり、
モータ１１はブラケット１３を介してバイパス２のフラ
ンジ部２ａにボルト１４で取り付けられている。
更に、バイパス２と排気管１０との合流点１０ａ付近に
はバイパス２の出口開閉弁１５が配設されている。
制御装置１６は、バイパス開閉弁３、送風機４のモータ
１１及びバイパス出口開閉弁１５に電気的に接続さｔ１
〜でおり、これらの開閉又は回転を制御するようになっ
ている。
なお図面において、１８はシリンダブロック、１９はシ
リンダヘッド、２０けシリンダへラドカバー、２１は吸
入弁、２２は吐出弁、２３はピストン、２４はコネクテ
ィングロッド、２５はクランクシャフト、２６けクラン
クケースである。
本発明は、上記のように構成されており、以下その作用
について説明する。エンジン５の始動時においては、制
御装置１６がバイパス開閉弁３及びバイパス出口開閉弁
１５を開き、送風機４のモータ１１を回転させ、軸流フ
ァン１２が回転する。
これによって吸気管８内を矢印Ａの如く流れて来た吸気
の一部は矢印Ｂの如くバイパス２内に流入し、送風機４
によって増圧されて矢印Ｃの如くバイパス２内を流れて
排気管１０に流れ込む。
一方吸気の他の一部は矢印Ａの如く吸入弁２１を通って
燃焼室２８内に入ってピストン２３により圧縮されて高
温となり、噴射ノズル（図示せず）から噴射される燃料
が着火し、クランキングの進行と共に該着火が次第に拡
大されてエンジン５は完全な燃焼を行うようになり、始
動する。この場合、吸気管８内を矢印Ａの如く吸気マニ
ホールド６に流れ込む吸気は、バイパス２内に矢印Ｂの
如く流れる吸気の分だけ少なくなっているので、燃焼室
２８内での空気の温度上昇は大きくなり、更にバイパス
２内で増圧された空気が排気管ｌｏ内に矢印Ｃの如く流
れ込むため、背圧が増大し、かつ排気マニホールド９付
近において対流が生じ、矢印りの如く流出する排気の一
部が燃焼室２８内５−
に残留する。従って、排気行程完了後の燃焼室２８内の
温度降下が少なく、該燃焼室は高温に保たれる。このよ
うなことから、クランキング中における燃料の着火は速
かに拡大シフ、エンジン５は順調に始動し７、矢印Ｅの
如く排気がなされる。
また暖機運転中もこの状態に保たれるのでエンジン５の
暖機は短時間で完了することになる。
暖機運転が終了すると、制御装置】６はバイパス開閉弁
３及びバイパス出口開閉弁１５を閉じ、送風機４のモー
タ１１を停止させるので吸気はすべて矢印Ａの如く流れ
て通常通りのエンジン５の運転が行われる。
なお上記において両開閉弁３．１５は常に全開にせずそ
の弁開度を外気温の程度により変化させてもよく、送風
＠４の送風能力を変化させてバイパス２内のｆｆ１ｉを
調節することも勿論可能である。
本発明は、上記のように構成され、作用するものである
から、吸気管から排気管に連通するバイパスを設け、エ
ンジンの始動時及び暖機運転時にはこのバイパス内に吸
気の一部を流入させて排気６−
管内に吐出するようにしたので、一方では吸気側の圧力
を低下させて吸入空気量を減少させて温度上昇を容易に
し、他方でＶ、１排気管内ＶＣバイパスからの空気を流
入させて対流を起とさ七ニで背圧を上昇させ、排うｉの
一部をエンジン内に残留さセて燃焼室内の温度上昇を促
進させることができ、この結果、エンジン、特に直噴式
のディーゼルエンジンの始動性の向上と暖機性能の向上
を図り、始動操作を容易することができる効果が得られ
る。またエアインテークヒータを補助的に用いる場合も
その使用時間を知縮することができるので、バッテリの
消耗が少なくて済む効果がある。[However, in cold winter months, large engines are difficult to start, so an air intake heater is installed in the intake pipe, and the heater is energized for about 30 seconds before cranking to increase the intake air temperature. The engine was started only after the engine was raised. However, in extremely cold weather, for example when the outside temperature drops below 120°C, the engine tends to not start smoothly even if the intake air temperature is raised by the heater, and for this reason the exhaust brake is activated and cranking is performed. However, since special additives were mixed into the fuel, there were problems in that the starting operation was noisy and troublesome. The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and its purpose is to provide a bypass that communicates from the intake pipe to the exhaust pipe, and to provide a bypass that communicates with the exhaust pipe when starting and warming up the engine. By letting a part of the intake air flow into the bypass and discharge it into the exhaust pipe, on the one hand, the pressure on the intake side is reduced and the intake air flow is reduced, making it easier to increase the temperature of the intake air, and on the other hand, the bypass into the exhaust pipe This method causes convection to occur and increases back pressure, and a part of the exhaust gas is passed into the engine to cause external noise, which promotes a rise in temperature within the combustion chamber. The objective is to improve the startability and warm-up performance of an injection-type diesel engine, and to facilitate the starting operation. In short, the present invention includes a bypass branched from an intake pipe and connected to an exhaust pipe, a bypass opening/closing valve disposed near a branching point between the bypass and the intake pipe, and an air flow in the intake pipe within the bypass. The invention is characterized in that it is equipped with a blower that allows the flow of air into the air. The present invention will be explained below based on embodiments shown in the drawings. The engine warm-up promotion device 1 according to the present invention includes a bypass 2,
It includes a bypass on-off valve 3 and a blower 4. Near the intake manifold 6 of the engine 5,
A bypass 2 branches from the intake pipe 8 , and the bypass is connected to an exhaust pipe 10 near an exhaust manifold 9 . The bypass on-off valve 3 is arranged near a branch point 8a between the bypass 2 and the intake pipe 8. It consists of 4 blowers, a motor 11 and an axial fan 12,
The motor 11 is attached to the flange portion 2a of the bypass 2 via a bracket 13 with bolts 14. Further, an outlet opening/closing valve 15 of the bypass 2 is provided near the confluence 10a of the bypass 2 and the exhaust pipe 10. The control device 16 is electrically connected to the bypass on-off valve 3, the motor 11 of the blower 4, and the bypass outlet on-off valve 15.
~, and their opening/closing or rotation is controlled. In the drawing, 18 is a cylinder block, 19 is a cylinder head, 20 cylinder rad covers, 21 is an intake valve, 22 is a discharge valve, 23 is a piston, 24 is a connecting rod, 25 is a crankshaft, and 26 is a crankcase. . The present invention is configured as described above, and its operation will be explained below. When starting the engine 5, the control device 16 opens the bypass on-off valve 3 and the bypass outlet on-off valve 15, rotates the motor 11 of the blower 4, and rotates the axial fan 12. As a result, part of the intake air that has flowed through the intake pipe 8 as shown by arrow A flows into the bypass 2 as shown by arrow B, and the blower 4
The pressure of the air is increased by the amount of air, and the air flows through the bypass 2 as shown by arrow C and flows into the exhaust pipe 10. On the other hand, the other part of the intake air passes through the intake valve 21 and enters the combustion chamber 28 as shown by arrow A, is compressed by the piston 23, becomes high temperature, and fuel injected from an injection nozzle (not shown) ignites. As cranking progresses, the ignition is gradually expanded and the engine 5 is started to perform complete combustion. In this case, the intake air flowing into the intake manifold 6 as shown by arrow A in the intake pipe 8 is reduced by the amount of intake air flowing into the bypass 2 as shown by arrow B, so that the temperature of the air in the combustion chamber 28 will not rise. As the air whose pressure is further increased in the bypass 2 flows into the exhaust pipe lo as shown by arrow C, the back pressure increases and convection occurs near the exhaust manifold 9, causing the exhaust gas to flow out as shown by the arrow. A portion remains in the combustion chamber 28. Therefore, the temperature drop within the combustion chamber 28 after the completion of the exhaust stroke is small, and the combustion chamber is maintained at a high temperature. For this reason, the ignition of the fuel during cranking is rapidly expanded, the engine 5 is started smoothly, and the engine 5 is exhausted as shown by arrow E. Further, since this state is maintained even during warm-up operation, warm-up of the engine 5 is completed in a short time. When the warm-up operation is completed, the control device 6 closes the bypass opening/closing valve 3 and the bypass outlet opening/closing valve 15 and stops the motor 11 of the blower 4, so that all intake air flows as shown by arrow A and the engine 5 operates normally. will be held. In addition, in the above, the double opening/closing valve 3.15 may not always be fully open, but its valve opening degree may be changed depending on the degree of outside temperature, and the air blowing capacity of the air blower @4 may be changed to adjust ff1i in the bypass 2. Of course it is possible. Since the present invention is constructed and operates as described above, a bypass is provided that communicates from the intake pipe to the exhaust pipe, and a portion of the intake air is allowed to flow into this bypass when starting and warming up the engine. Since the exhaust gas is discharged into the 6-pipe, on the one hand, the pressure on the intake side is lowered to reduce the amount of intake air and the temperature rise is facilitated, and on the other hand, the air from the VC bypass in the V1 exhaust pipe is inflowed. This causes convection, which increases the back pressure and causes a part of the exhaust gas to remain in the engine, promoting a temperature rise in the combustion chamber. It is possible to improve the startability and warm-up performance of a diesel engine, thereby facilitating the starting operation. Furthermore, even when the air intake heater is used auxiliary, its usage time can be shortened, which has the effect of reducing battery consumption.
第１図は本発明装置の概略縦断面図である。
１リエンジンの暖機促進装置、２はバイパス、３はバイ
パス開閉弁、４Ｆｉ送風機、８は吸気管、５ａＶｉ分岐
点、１０は排気管である。
特許出願人 日野自動車工業株式会社代理人 弁理士
内 １）和 男
７−FIG. 1 is a schematic vertical sectional view of the device of the present invention. 1 is a warm-up promotion device for the re-engine, 2 is a bypass, 3 is a bypass opening/closing valve, 4Fi blower, 8 is an intake pipe, 5aVi branch point, and 10 is an exhaust pipe. Patent applicant Hino Motors Co., Ltd. Agent Patent attorney 1) Kazuo 7-
Claims (1)
該バイパスと前−記吸気管との分岐点付近−に配設され
たバイパス開閉弁と、該バイパス内に前記吸気管内の空
気を流入させるようにした送風後とを備えたことを特徴
とするエンジンの暖機促進装置。A bypass branched from the intake pipe and connected to the exhaust pipe,
It is characterized by comprising a bypass opening/closing valve disposed near the branch point between the bypass and the intake pipe, and an air blower that causes air in the intake pipe to flow into the bypass. Engine warm-up accelerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58054884A JPS59180049A (en) | 1983-03-30 | 1983-03-30 | Apparatus for promoting warm-up of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58054884A JPS59180049A (en) | 1983-03-30 | 1983-03-30 | Apparatus for promoting warm-up of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59180049A true JPS59180049A (en) | 1984-10-12 |
Family
ID=12983009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58054884A Pending JPS59180049A (en) | 1983-03-30 | 1983-03-30 | Apparatus for promoting warm-up of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59180049A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140035232A1 (en) * | 2011-11-15 | 2014-02-06 | Tokai Rubber Industries, Ltd. | Protective cover and manufacturing method thereof |
| US20140129069A1 (en) * | 2011-06-23 | 2014-05-08 | Toyota Jidosha Kabushiki Kaisha | Vehicle |
-
1983
- 1983-03-30 JP JP58054884A patent/JPS59180049A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140129069A1 (en) * | 2011-06-23 | 2014-05-08 | Toyota Jidosha Kabushiki Kaisha | Vehicle |
| US9242635B2 (en) * | 2011-06-23 | 2016-01-26 | Toyota Jidosha Kabushiki Kaisha | Vehicle having a ventilation device for an intake passage of an internal combustion engine |
| US20140035232A1 (en) * | 2011-11-15 | 2014-02-06 | Tokai Rubber Industries, Ltd. | Protective cover and manufacturing method thereof |
| US9470316B2 (en) | 2011-11-15 | 2016-10-18 | Sumitomo Riko Company Limited | Protective cover and manufacturing method thereof |
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