JP2007255334A - Heater piping device of vehicle - Google Patents

Heater piping device of vehicle Download PDF

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JP2007255334A
JP2007255334A JP2006082025A JP2006082025A JP2007255334A JP 2007255334 A JP2007255334 A JP 2007255334A JP 2006082025 A JP2006082025 A JP 2006082025A JP 2006082025 A JP2006082025 A JP 2006082025A JP 2007255334 A JP2007255334 A JP 2007255334A
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heater
pipe
engine
egr cooler
engine coolant
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Hideki Nishikimi
英樹 錦見
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Mitsubishi Fuso Truck and Bus Corp
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Mitsubishi Fuso Truck and Bus Corp
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    • 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

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  • Air-Conditioning For Vehicles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heater piping device of a vehicle capable of enhancing efficiency for heating the inside of a cabin and eliminating the shortage of cooling an EGR cooler device. <P>SOLUTION: This heater piping device comprises the EGR cooler device 14 mounted to the vehicle and cooling an EGR gas by an engine coolant, a first pipe 16 connected to the EGR cooler device 14 and guiding the coolants to rear heaters 18a, 18b and 18c with first, second, and third preheaters serving as heater devices 17 for heating the inside of the cabin, and a second pipe 21 for returning the coolant from the heater device 17 into an engine 11. The heater piping device further comprises a stop valve 20 installed in the first pipe 16 or the second pipe 21 and stopping the flow of the coolant from the EGR cooler device 14 into the heater device 17 when heating operation is suspended and a bypass pipe 22 having an inner diameter smaller than the inner diameters of the first pipe 16 and the second pipe 21 and allowing the coolant to flow by bypassing the first pipe 16 on the upstream side of the stop valve 20 to the second pipe 21 on the downstream side of the stop valve 20. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、例えば、大型バス等の車両において、エンジン冷却液でＥＧＲガスを冷却するＥＧＲクーラ装置を搭載した車両のヒータ配管装置に関する。   The present invention relates to a heater piping device for a vehicle equipped with an EGR cooler device that cools EGR gas with engine coolant in a vehicle such as a large bus.

エンジンの排ガスの一部を排気通路側から吸気通路側に再循環させるＥＧＲ通路にＥＧＲクーラ装置を設け、再循環排ガスをエンジン冷却液と熱交換させて冷却する車両において、エンジン冷却液を空調用ヒータ装置に循環させる回路を持ったＥＧＲ装置が知られている（例えば、特許文献１参照。）。
特許文献１のものは、ＥＧＲクーラ装置にはエンジン冷却液によってＥＧＲガスを冷却する冷却液回路が設けられている。この冷却液回路は空調用ヒータ装置に接続され、エンジン冷却液が空調用ヒータ装置に導かれ、この空調用ヒータ装置からエンジンに還流するようになっている。従って、エンジン冷却液がＥＧＲクーラ装置に流れると、ＥＧＲガスで逆に加熱されるので、エンジン冷却液から見ると、ＥＧＲクーラ装置はエンジン冷却液を加熱するヒータとなり、エンジン冷却液は温水となり、この温水を空調用ヒータ装置に導くことにより、車室内の暖房能力の向上を図ることができる。
また、前述のようなＥＧＲクーラ装置を備えた大型バスの空調システムについて説明すると、図４に示すように構成されている。すなわち、エンジン１１はエンジン本体１２と変速機１３とから構成されている。エンジン本体１２にはエンジン冷却液を循環する冷却回路が設けられ、エンジン冷却液はエンジン本体１２からＥＧＲガスを冷却するＥＧＲクーラ装置１４及びＥＧＲガス量を調整するＥＧＲバルブ１５に導かれる。 An EGR cooler device is installed in the EGR passage that recirculates a part of the engine exhaust gas from the exhaust passage side to the intake passage side, and the engine coolant is used for air conditioning in a vehicle that cools the recirculated exhaust gas by exchanging heat with the engine coolant. An EGR device having a circuit that circulates in a heater device is known (for example, see Patent Document 1).
As for the thing of patent document 1, the coolant circuit which cools EGR gas with engine coolant is provided in the EGR cooler device. The coolant circuit is connected to an air conditioning heater device, and the engine coolant is led to the air conditioning heater device and is returned to the engine from the air conditioning heater device. Therefore, when the engine coolant flows into the EGR cooler device, it is heated reversely by the EGR gas. From the viewpoint of the engine coolant, the EGR cooler device becomes a heater that heats the engine coolant, the engine coolant becomes warm water, By guiding this hot water to the air conditioning heater device, the heating capacity of the passenger compartment can be improved.
Further, a description will be given of an air conditioning system for a large bus provided with the EGR cooler as described above, which is configured as shown in FIG. That is, the engine 11 includes an engine body 12 and a transmission 13. The engine body 12 is provided with a cooling circuit for circulating engine coolant, and the engine coolant is guided from the engine body 12 to an EGR cooler device 14 for cooling EGR gas and an EGR valve 15 for adjusting the amount of EGR gas.

ＥＧＲクーラ装置１４及びＥＧＲバルブ１５にはエンジン冷却液をＥＧＲクーラ装置１４及びＥＧＲバルブ１５に導き、ＥＧＲクーラ装置１４及びＥＧＲバルブ１５を冷却する冷却液回路１４ａ，１５ａが配管されている。冷却液回路１４ａ，１５ａは合流して第１配管１６を介して客室内暖房用のヒータ装置１７に接続されている。   The EGR cooler device 14 and the EGR valve 15 are provided with coolant circuits 14 a and 15 a that guide the engine coolant to the EGR cooler device 14 and the EGR valve 15 and cool the EGR cooler device 14 and the EGR valve 15. The coolant circuits 14 a and 15 a join together and are connected to a heater device 17 for room heating via a first pipe 16.

客室内暖房用のヒータ装置１７は、第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃと、これと直列に接続されたフロント乗員室を暖房するプレヒータ付きフロントヒータ１９とを備えている。さらに、第１のプレヒータ付きリヤヒータ１８ａには暖房運転休止時にエンジン冷却液の流通を停止するストップバルブ２０が設けられている。そして、前記第１配管１６は第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃ→プレヒータ付きフロントヒータ１９にエンジン冷却液（温水）を導くようになっており、プレヒータ付きフロントヒータ１９から第２配管２１を介してエンジン本体１２に戻すようになっている。
従って、エンジン冷却液はＥＧＲクーラ装置１４を流通するＥＧＲガスで加熱されるので、エンジン冷却液から見ると、ＥＧＲクーラ装置１４はエンジン冷却液を加熱するヒータとなり、そのエンジン冷却液（温水）が第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃ及びプレヒータ付きフロントヒータ１９に導かれることにより、車室内の暖房能力を向上できる。
なお、プレヒータは、エンジン始動初期などに車室内温度が設定温度まで立ち上がる時間を早める目的で、エンジン冷却液をさらに加熱する装置である。
特開２００２−３４０２８４号公報 The heater device 17 for heating in the passenger cabin includes first, second and third rear heaters 18a, 18b, 18c with preheaters and a front heater 19 with preheaters for heating the front passenger compartment connected in series therewith. ing. Further, the first preheater-equipped rear heater 18a is provided with a stop valve 20 for stopping the flow of the engine coolant when the heating operation is stopped. The first pipe 16 guides the engine coolant (warm water) to the first, second and third rear heaters 18a, 18b, 18c with preheater → the front heater 19 with preheater. 19 is returned to the engine body 12 via the second pipe 21.
Therefore, since the engine coolant is heated by the EGR gas flowing through the EGR cooler device 14, when viewed from the engine coolant, the EGR cooler device 14 serves as a heater for heating the engine coolant, and the engine coolant (hot water) is By being guided to the first, second and third rear heaters 18a, 18b, 18c with preheater and the front heater 19 with preheater, the heating capacity of the vehicle interior can be improved.
The preheater is a device that further heats the engine coolant for the purpose of shortening the time during which the vehicle interior temperature rises to the set temperature in the initial stage of engine startup.
JP 2002-340284 A

従来のものは、ＥＧＲクーラ装置１４が第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃ及びプレヒータ付きフロントヒータ１９に直結されているために、車室内の暖房効率が高い。しかし、温度調節バランスの関係で、ＥＧＲクーラ装置１４と第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃが直列に接続されているため、夏季にストップバルブ２０を閉じると、エンジン冷却液の循環路が閉鎖されるため、ＥＧＲクーラ装置１４にエンジン冷却液が流れなくなり、ＥＧＲクーラ装置１４の冷却能力が低下するという問題がある。さらに、エンジン本体１２に流れるエンジン冷却液も停止するため、エンジン本体１２のオーバヒートの原因となる。   Conventionally, the EGR cooler device 14 is directly connected to the first, second and third rear heaters 18a, 18b, 18c with preheater and the front heater 19 with preheater, so that the heating efficiency of the vehicle interior is high. However, because of the temperature control balance, the EGR cooler device 14 and the first, second and third preheater-equipped rear heaters 18a, 18b and 18c are connected in series. Since the coolant circulation path is closed, there is a problem that the engine coolant does not flow into the EGR cooler device 14 and the cooling capacity of the EGR cooler device 14 is reduced. Further, the engine coolant flowing through the engine body 12 is also stopped, which causes overheating of the engine body 12.

本発明は、前記事情に着目してなされたもので、その目的とするところは、車室内の暖房効率の向上を図ると共に、ＥＧＲクーラ装置の冷却不足を解消できる車両のヒータ配管装置を提供することにある。   The present invention has been made paying attention to the above circumstances, and an object of the present invention is to provide a vehicle heater piping device that can improve the heating efficiency of the passenger compartment and can solve the insufficient cooling of the EGR cooler device. There is.

本発明は、前記目的を達成するために、請求項１は、車両に搭載され、エンジンを冷却するエンジン冷却液でＥＧＲガスを冷却するＥＧＲクーラ装置と、前記ＥＧＲクーラ装置と接続され、前記エンジン冷却液を車室内暖房用のヒータ装置に導く第１配管と、前記ヒータ装置から前記エンジンに前記エンジン冷却液を戻す第２配管と、前記ヒータ装置に設けられ、暖房運転休止時に前記ＥＧＲクーラ装置から前記ヒータ装置へのエンジン冷却液の流通を停止するストップバルブと、内径が前記第１配管及び第２配管より小径で、前記ストップバルブ及び前記ヒータ装置の上流側の前記第１配管と前記ヒータ装置の下流側の第２配管とをバイパスして前記エンジン冷却液の流通を許容するバイパス管とを具備したことを特徴とする車両のヒータ配管装置にある。
請求項２は、車両に搭載され、エンジンを冷却するエンジン冷却液でＥＧＲガスを冷却するＥＧＲクーラ装置と、前記ＥＧＲクーラ装置と接続され、前記エンジン冷却液を第１の暖房用ヒータ装置及びこれと直列に接続される第２の暖房用ヒータ装置に導く第１配管と、前記第２の暖房用ヒータ装置から前記エンジンに前記エンジン冷却液を戻す第２配管と、前記第１の暖房用ヒータ装置に設けられ、暖房運転休止時に前記ＥＧＲクーラ装置から前記第１及び第２のヒータ装置へのエンジン冷却液の流通を停止するストップバルブと、内径が前記第１配管より小径で、前記ストップバルブ及び前記第１の暖房用ヒータ装置の上流側の前記第１配管と前記第１の暖房用ヒータ装置の下流側の前記第１配管とをバイパスして前記エンジン冷却液の流通を許容するバイパス管とを具備したことを特徴とする車両のヒータ配管装置にある。 In order to achieve the above object, the present invention provides an EGR cooler device that is mounted on a vehicle and cools EGR gas with an engine coolant that cools the engine, and is connected to the EGR cooler device. A first pipe for guiding the coolant to a heater device for heating the vehicle interior, a second pipe for returning the engine coolant from the heater device to the engine, and the EGR cooler device provided in the heater device when the heating operation is stopped. A stop valve for stopping the flow of the engine coolant from the heater to the heater device, the inner diameter is smaller than the first pipe and the second pipe, and the first pipe and the heater on the upstream side of the stop valve and the heater device A vehicle heater comprising a bypass pipe that bypasses a second pipe on the downstream side of the apparatus and allows the engine coolant to flow therethrough. In the tube apparatus.
According to a second aspect of the present invention, there is provided an EGR cooler device that is mounted on a vehicle and cools EGR gas with an engine coolant that cools the engine, and is connected to the EGR cooler device. A first pipe led to a second heating heater device connected in series with the second heating heater device, a second piping for returning the engine coolant from the second heating heater device to the engine, and the first heating heater A stop valve provided in the apparatus for stopping the flow of engine coolant from the EGR cooler device to the first and second heater devices when the heating operation is stopped; and an inner diameter that is smaller than the first pipe and the stop valve And bypassing the first piping upstream of the first heating heater device and the first piping downstream of the first heating heater device, the engine coolant In heater piping device for a vehicle, characterized by comprising a bypass pipe to allow passage.

本発明によれば、暖房用ヒータ装置に供給するエンジン冷却液を遮断してもエンジンに流れるエンジン冷却液は循環するため、エンジンのオーバヒートを防止できる。また、ＥＧＲクーラ装置からヒータ装置にエンジン冷却液が直列に流れるため、暖房効率の向上を図ると共に、暖房用ヒータ装置を停止してもエンジン冷却液をＥＧＲクーラ装置に流すことができ、ＥＧＲクーラ装置の冷却不足を解消できるという効果がある。   According to the present invention, even if the engine coolant supplied to the heater device for heating is shut off, the engine coolant flowing to the engine circulates, so that overheating of the engine can be prevented. Further, since the engine coolant flows in series from the EGR cooler device to the heater device, it is possible to improve the heating efficiency and to flow the engine coolant to the EGR cooler device even when the heater device for heating is stopped. There is an effect that insufficient cooling of the apparatus can be solved.

以下、本発明の実施の形態を図面に基づいて説明する。
図１は車両である大型バスのヒータ配管装置の第１の実施形態を示し、エンジン１１はエンジン本体１２と変速機１３とから構成されている。エンジン本体１２には該エンジン本体１２の冷却液によってＥＧＲガスを冷却するＥＧＲクーラ装置１４及びＥＧＲガス量を調整するＥＧＲバルブ１５が設けられている。ＥＧＲクーラ装置１４はエンジン本体１２の排気ガスの一部（ＥＧＲガス）を還流するＥＧＲ通路に設けられ、ＥＧＲクーラ装置１４にはエンジン本体１２からのエンジン冷却液が導く冷却液回路１４ａが設けられている。ＥＧＲバルブ１５はＥＧＲ通路を開閉するようになっており、このＥＧＲバルブ１５にはエンジン冷却液をＥＧＲバルブ１５に導いてＥＧＲバルブ１５を冷却する冷却液回路１５ａが設けられている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a first embodiment of a heater piping device for a large bus, which is a vehicle, and an engine 11 is composed of an engine body 12 and a transmission 13. The engine body 12 is provided with an EGR cooler device 14 that cools the EGR gas with the coolant of the engine body 12 and an EGR valve 15 that adjusts the amount of EGR gas. The EGR cooler device 14 is provided in an EGR passage that recirculates a part of the exhaust gas (EGR gas) of the engine body 12, and the EGR cooler device 14 is provided with a coolant circuit 14 a that guides engine coolant from the engine body 12. ing. The EGR valve 15 opens and closes the EGR passage, and the EGR valve 15 is provided with a coolant circuit 15 a that guides engine coolant to the EGR valve 15 and cools the EGR valve 15.

冷却液回路１４ａ，１５ａは合流して第１配管１６を介して客室内暖房用のヒータ装置１７に接続されている。客室内暖房用のヒータ装置１７は、例えば、第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃと、これらと直列に接続されたフロント乗員室を暖房するプレヒータ付きフロントヒータ１９とを備えている。さらに、第１のプレヒータ付きリヤヒータ１８ａには暖房運転休止時にエンジン冷却液の流通を停止するストップバルブ２０が設けられている。そして、第１配管１６は、第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃを経てプレヒータ付きフロントヒータ１９に冷却液を導くようになっており、プレヒータ付きフロントヒータ１９から第２配管２１を介してエンジン本体１２に戻すようになっている。
さらに、ＥＧＲクーラ装置１４の下流側（第１のプレヒータ付きリヤヒータ１８ａの上流側）の第１配管１６とプレヒータ付きフロントヒータ１９の下流側（エンジン本体１２の上流側）の第２配管２１とはバイパス管２２によって連通している。このバイパス管２２は内径が第１配管１６及び第２配管２１より小径で、夏季にストップバルブ２０を閉じて客室暖房を休止し、第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃに流れるエンジン冷却液を停止しても、第１配管１６を流通するエンジン冷却液がバイパス管２２を介して第２配管２１に流れ、この第２配管２１を介してエンジン冷却液がエンジン本体１２に還流するようになっている。
このように構成された車両のヒータ配管装置によれば、ＥＧＲクーラ装置１４と第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃが第１配管１６を介して直列に接続されている。従って、エンジン本体１２のエンジン冷却液は冷却液回路１４ａを介してＥＧＲクーラ装置１４に導かれ、このＥＧＲクーラ装置１４を流通するＥＧＲガスで加熱されるので、エンジン冷却液から見ると、ＥＧＲクーラ装置１４はエンジン冷却液を加熱するヒータとなり、高温度のエンジン冷却液が第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃに導かれることにより、客室内の暖房能力の向上できる。
さらに、夏季にストップバルブ２０を閉じて客室暖房を休止し、第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃに流れるエンジン冷却液を停止しても、第１配管１６を流通するエンジン冷却液がバイパス管２２を介して第２配管２１に流れ、この第２配管２１を介してエンジン冷却液がエンジン本体１２に還流する。従って、エンジン本体１２からエンジン冷却液が冷却液回路１４ａを介してＥＧＲクーラ装置１４に導かれ、冷却不足を解消できる。
また、バイパス管２２は、その内径が第１配管１６及び第２配管２１より小径にしただけの構造で、ストップバルブ２０が開いているときに、エンジン冷却液はバイパス管２２に比べて抵抗が小さい第１配管１６、第２配管２１を流れるため、第１配管１６とバイパス管２２との分岐部に流路切換弁等を設ける必要がなく、コスト的にも有利である。 The coolant circuits 14 a and 15 a merge together and are connected to a heater device 17 for heating the cabin through a first pipe 16. The heater device 17 for heating the passenger compartment includes, for example, first, second, and third rear heaters 18a, 18b, and 18c with preheaters, and a front heater 19 with preheaters that heats the front passenger compartment connected in series with them. It has. Further, the first preheater-equipped rear heater 18a is provided with a stop valve 20 for stopping the flow of the engine coolant when the heating operation is stopped. The first pipe 16 guides the coolant to the front heater 19 with preheater via the first, second and third rear heaters 18a, 18b, 18c with preheater. It returns to the engine body 12 via the two pipes 21.
Furthermore, the first pipe 16 on the downstream side (upstream side of the first preheater-equipped rear heater 18a) of the EGR cooler device 14 and the second pipe 21 on the downstream side (upstream side of the engine body 12) of the front heater 19 with preheater are described. The bypass pipe 22 communicates. This bypass pipe 22 has an inner diameter smaller than that of the first pipe 16 and the second pipe 21, closes the stop valve 20 in the summer and stops the cabin heating, and the first, second and third preheater-equipped rear heaters 18a, 18b, Even if the engine coolant flowing to 18c is stopped, the engine coolant flowing through the first pipe 16 flows to the second pipe 21 via the bypass pipe 22, and the engine coolant passes through the second pipe 21 to the engine main body. 12 to reflux.
According to the heater piping device for a vehicle configured as described above, the EGR cooler device 14 and the first, second and third preheater-equipped rear heaters 18a, 18b and 18c are connected in series via the first piping 16. Yes. Accordingly, the engine coolant of the engine body 12 is guided to the EGR cooler device 14 via the coolant circuit 14a and heated by the EGR gas flowing through the EGR cooler device 14. Therefore, when viewed from the engine coolant, the EGR cooler The device 14 serves as a heater for heating the engine coolant, and the high-temperature engine coolant is led to the first, second, and third preheater-equipped rear heaters 18a, 18b, and 18c, so that the heating capacity in the cabin can be improved. .
Furthermore, even if the stop valve 20 is closed in the summer to stop the cabin heating and the engine coolant flowing through the first, second and third preheater-equipped rear heaters 18a, 18b and 18c is stopped, the first pipe 16 is circulated. The engine coolant that flows into the second pipe 21 passes through the bypass pipe 22, and the engine coolant returns to the engine body 12 through the second pipe 21. Therefore, the engine coolant is guided from the engine body 12 to the EGR cooler device 14 via the coolant circuit 14a, and the lack of cooling can be solved.
The bypass pipe 22 has a structure in which the inner diameter is only smaller than those of the first pipe 16 and the second pipe 21. When the stop valve 20 is open, the engine coolant is more resistant than the bypass pipe 22. Since the small first pipe 16 and the second pipe 21 flow, it is not necessary to provide a flow path switching valve or the like at the branch portion between the first pipe 16 and the bypass pipe 22, which is advantageous in terms of cost.

さらに、ＥＧＲクーラ装置１４のＥＧＲガスを冷却する冷却液回路１４ａとＥＧＲバルブ１５のＥＧＲガスを冷却する冷却液回路１５ｂとが並列に設けられているため、エンジン冷却液がＥＧＲクーラ装置１４を介してＥＧＲバルブ１５に流通する直列回路に比べてＥＧＲクーラ装置１４及びＥＧＲバルブ１５の冷却性能を向上できる。
また、客室暖房用として第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃを直列に接続したため、広い客室でも均等な風量、熱量を出力でき、さらに、第１のプレヒータ付きリヤヒータ１８ａのみにストップバルブ２０を設けたため、配管構造の簡略化及び部品点数を減少でき、コストダウンを図ることができる。
図２は車両である大型バスのヒータ配管装置の第２の実施形態を示し、第１の実施形態と同一構成部分には同一番号を付して説明を省略する。本実施形態は、ＥＧＲクーラ装置１４の下流側（第１のプレヒータ付きリヤヒータ１８ａの上流側）の第１配管１６とプレヒータ付きフロントヒータ１９の上流側（第３のプレヒータ付きリヤヒータ１８ｃの下流側）の第１配管１６とをバイパス管２３によって連通したものである。 Furthermore, since the coolant circuit 14a for cooling the EGR gas of the EGR cooler device 14 and the coolant circuit 15b for cooling the EGR gas of the EGR valve 15 are provided in parallel, the engine coolant passes through the EGR cooler device 14. Therefore, the cooling performance of the EGR cooler device 14 and the EGR valve 15 can be improved as compared with the series circuit flowing through the EGR valve 15.
In addition, since the first, second, and third rear heaters 18a, 18b, and 18c with preheaters are connected in series for room heating, an even air volume and heat can be output even in a large cabin, and the first rear heater 18a with preheater is also provided. Since only the stop valve 20 is provided, the piping structure can be simplified, the number of parts can be reduced, and the cost can be reduced.
FIG. 2 shows a second embodiment of a heater piping device for a large bus, which is a vehicle. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the present embodiment, the first pipe 16 on the downstream side of the EGR cooler device 14 (upstream side of the first preheater-equipped rear heater 18a) and the upstream side of the preheater-equipped front heater 19 (downstream side of the third preheater-equipped rear heater 18c). The first pipe 16 is communicated with the bypass pipe 23.

このバイパス管２３は内径が第１配管１６及び第２配管２１より小径で、夏季にストップバルブ２０を閉じて客室暖房を休止し、第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃに流れるエンジン冷却液を停止しても、ＥＧＲクーラ装置１４から第１配管１６に流通するエンジン冷却液をバイパス管２３を介してプレヒータ付きフロントヒータ１９の上流側の第１配管１６に導くことができる。
従って、プレヒータ付きフロントヒータ１９からエンジン冷却液を第２配管２１を介してエンジン本体１２に還流することができ、第１の実施形態と同様に、エンジン本体１２からエンジン冷却液が冷却液回路１４ａを介してＥＧＲクーラ装置１４に導かれ、冷却不足を解消できる。
図３は車両である大型バスのヒータ配管装置の第３の実施形態を示し、第１の実施形態と同一構成部分には同一番号を付して説明を省略する。本実施形態は、客室内暖房用として、第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃを設け、フロント乗員室を暖房するプレヒータ付きフロントヒータ１９を設けないか、別のサイクルの暖房システムの場合を示す。本実施形態は、ＥＧＲクーラ装置１４の下流側（第１のプレヒータ付きリヤヒータ１８ａの上流側）の第１配管１６と第３のプレヒータ付きリヤヒータ１８ｃの下流側の第２配管２１とをバイパス管２４によって連通したものである。 The bypass pipe 23 has an inner diameter smaller than that of the first pipe 16 and the second pipe 21, closes the stop valve 20 in the summer, stops the cabin heating, and the first, second and third preheater-equipped rear heaters 18a, 18b, Even if the engine coolant flowing to 18c is stopped, the engine coolant flowing from the EGR cooler device 14 to the first pipe 16 is guided to the first pipe 16 upstream of the front heater 19 with the preheater via the bypass pipe 23. Can do.
Therefore, the engine coolant can be recirculated from the front heater 19 with the preheater to the engine body 12 via the second pipe 21, and the engine coolant is sent from the engine body 12 to the coolant circuit 14a as in the first embodiment. Is led to the EGR cooler device 14, and the lack of cooling can be solved.
FIG. 3 shows a third embodiment of a heater piping device for a large bus that is a vehicle. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the present embodiment, the first, second, and third rear heaters 18a, 18b, and 18c with preheaters are provided for heating in the passenger cabin, and the front heater 19 with preheaters for heating the front passenger compartment is not provided, or another cycle. The case of a heating system is shown. In the present embodiment, a bypass pipe 24 connects a first pipe 16 downstream of the EGR cooler device 14 (upstream of the first preheater-equipped rear heater 18a) and a second pipe 21 downstream of the third preheater-equipped rear heater 18c. Communicated with each other.

このバイパス管２４は内径が第１配管１６及び第２配管２１より小径で、夏季にストップバルブ２０を閉じて客室暖房を休止し、第１、第２及び第３のプレヒータ付きリヤヒータ１８ａ，１８ｂ，１８ｃに流れるエンジン冷却液を停止しても、ＥＧＲクーラ装置１４から第１配管１６に流通するエンジン冷却液をバイパス管２４を介してエンジン本体１２の上流側の第２配管２１に導くことができる。従って、エンジン冷却液を第２配管２１を介してエンジン本体１２に還流することができ、第１，２の実施形態と同様に、エンジン本体１２からエンジン冷却液が冷却液回路１４ａを介してＥＧＲクーラ装置１４に導かれ、冷却不足を解消できる。
なお、この発明は、前記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、前記実施形態に開示されている複数の構成要素の適宜な組合せにより種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。さらに、異なる実施形態に亘る構成要素を適宜組合わせてもよい。 The bypass pipe 24 has an inner diameter smaller than that of the first pipe 16 and the second pipe 21, closes the stop valve 20 in the summer, stops the cabin heating, and the first, second and third preheater-equipped rear heaters 18a, 18b, Even if the engine coolant flowing to 18c is stopped, the engine coolant flowing from the EGR cooler device 14 to the first pipe 16 can be guided to the second pipe 21 on the upstream side of the engine body 12 via the bypass pipe 24. . Therefore, the engine coolant can be recirculated to the engine body 12 via the second pipe 21, and the engine coolant is sent from the engine body 12 via the coolant circuit 14a to the EGR as in the first and second embodiments. Guided to the cooler device 14 can solve the lack of cooling.
Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

本発明の第１の実施形態を示し、車両のヒータ配管装置の構成図。The 1st Embodiment of this invention is shown, and the block diagram of the heater piping apparatus of a vehicle. 本発明の第２の実施形態を示し、車両のヒータ配管装置の構成図。The block diagram of the heater piping apparatus of the vehicle which shows the 2nd Embodiment of this invention. 本発明の第３の実施形態を示し、車両のヒータ配管装置の構成図。The block diagram of the heater piping apparatus of the vehicle which shows the 3rd Embodiment of this invention. 従来の車両のヒータ配管装置の構成図。The block diagram of the heater piping apparatus of the conventional vehicle.

符号の説明Explanation of symbols

１１…エンジン、１４…ＥＧＲクーラ装置、１５…ＥＧＲバルブ、１６…第１配管、１８ａ，１８ｂ，１８ｃ…第１、第２及び第３のプレヒータ付きリヤヒータ、１９…プレヒータ付きフロントヒータ、２０…ストップバルブ、２１…第２配管、２２，２３，２４…バイパス管 DESCRIPTION OF SYMBOLS 11 ... Engine, 14 ... EGR cooler apparatus, 15 ... EGR valve, 16 ... 1st piping, 18a, 18b, 18c ... Rear heater with 1st, 2nd and 3rd preheater, 19 ... Front heater with preheater, 20 ... Stop Valve, 21 ... second pipe, 22, 23, 24 ... bypass pipe

Claims (4)

車両に搭載され、エンジンを冷却するエンジン冷却液でＥＧＲガスを冷却するＥＧＲクーラ装置と、
前記ＥＧＲクーラ装置と接続され、前記エンジン冷却液を車室内暖房用のヒータ装置に導く第１配管と、
前記ヒータ装置から前記エンジンに前記エンジン冷却液を戻す第２配管と、
前記ヒータ装置に設けられ、暖房運転休止時に前記ＥＧＲクーラ装置から前記ヒータ装置へのエンジン冷却液の流通を停止するストップバルブと、
内径が前記第１配管及び第２配管より小径で、前記ストップバルブ及び前記ヒータ装置の上流側の前記第１配管と前記ヒータ装置の下流側の第２配管とをバイパスして前記エンジン冷却液の流通を許容するバイパス管と、
を具備したことを特徴とする車両のヒータ配管装置。 An EGR cooler device that is mounted on a vehicle and that cools EGR gas with an engine coolant that cools the engine;
A first pipe connected to the EGR cooler device and guiding the engine coolant to a heater device for heating the vehicle interior;
A second pipe for returning the engine coolant from the heater device to the engine;
A stop valve that is provided in the heater device and stops the flow of engine coolant from the EGR cooler device to the heater device when the heating operation is stopped;
The inner diameter is smaller than that of the first pipe and the second pipe, bypassing the stop valve and the first pipe upstream of the heater device and the second pipe downstream of the heater device, A bypass pipe allowing distribution;
A heater piping device for a vehicle, comprising: 車両に搭載され、エンジンを冷却するエンジン冷却液でＥＧＲガスを冷却するＥＧＲクーラ装置と、
前記ＥＧＲクーラ装置と接続され、前記エンジン冷却液を第１の暖房用ヒータ装置及びこれと直列に接続される第２の暖房用ヒータ装置に導く第１配管と、
前記第２の暖房用ヒータ装置から前記エンジンに前記エンジン冷却液を戻す第２配管と、
前記第１の暖房用ヒータ装置に設けられ、暖房運転休止時に前記ＥＧＲクーラ装置から前記第１及び第２のヒータ装置へのエンジン冷却液の流通を停止するストップバルブと、
内径が前記第１配管より小径で、前記ストップバルブ及び前記第１の暖房用ヒータ装置の上流側の前記第１配管と前記第１の暖房用ヒータ装置の下流側の前記第１配管とをバイパスして前記エンジン冷却液の流通を許容するバイパス管と、
を具備したことを特徴とする車両のヒータ配管装置。 An EGR cooler device that is mounted on a vehicle and that cools EGR gas with an engine coolant that cools the engine;
A first pipe connected to the EGR cooler device and leading the engine coolant to a first heating heater device and a second heating heater device connected in series therewith;
A second pipe for returning the engine coolant from the second heater device to the engine;
A stop valve provided in the first heater device for stopping the flow of engine coolant from the EGR cooler device to the first and second heater devices when the heating operation is stopped;
The inner diameter is smaller than that of the first pipe, and bypasses the first pipe on the upstream side of the stop valve and the first heater device and the first pipe on the downstream side of the first heater device. And a bypass pipe that allows the flow of the engine coolant,
A heater piping device for a vehicle, comprising: 請求項１または２において、前記エンジンに供給するＥＧＲガス量を調整するＥＧＲバルブを更に備え、前記ＥＧＲクーラ装置のＥＧＲガスを冷却する冷却液回路と前記ＥＧＲバルブのＥＧＲガスを冷却する冷却液回路とを並列に設けたことを特徴とする車両のヒータ配管装置。   3. The coolant circuit for cooling EGR gas of the EGR cooler device and the coolant circuit for cooling EGR gas of the EGR valve, further comprising an EGR valve that adjusts an amount of EGR gas supplied to the engine. And a heater piping device for a vehicle. 前記ヒータ装置は、車室内に複数配置され、直列に接続されたプレヒータ付きヒータ列からなり、前記プレヒータ付きヒータ列の一端側が前記ＥＧＲクーラ装置の下流側に接続され、前記プレヒータ付きヒータ列の他端側が前記エンジンの上流側に接続され、さらに前記ＥＧＲクーラ装置の下流側に接続される前記プレヒータ付きヒータに、暖房運転休止時にエンジン冷却液の流通を停止するストップバルブを設けたことを特徴とする請求項１記載の車両のヒータ配管装置。   The heater device includes a plurality of heater arrays with preheaters arranged in series and connected in series. One end side of the heater array with preheaters is connected to the downstream side of the EGR cooler device, and the other heater array with preheaters The heater with a preheater connected to the upstream side of the engine and further to the downstream side of the EGR cooler device is provided with a stop valve for stopping the flow of the engine coolant when the heating operation is stopped. The heater piping device for a vehicle according to claim 1.
JP2006082025A 2006-03-24 2006-03-24 Heater piping device of vehicle Pending JP2007255334A (en)

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WO2017110214A1 (en) * 2015-12-21 2017-06-29 株式会社デンソー Vehicular air-conditioning device
JP2017114179A (en) * 2015-12-21 2017-06-29 株式会社デンソー Vehicle air-conditioning device

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