JPH08291711A - Cooling device for internal combustion engine - Google Patents

Cooling device for internal combustion engine

Info

Publication number
JPH08291711A
JPH08291711A JP9652595A JP9652595A JPH08291711A JP H08291711 A JPH08291711 A JP H08291711A JP 9652595 A JP9652595 A JP 9652595A JP 9652595 A JP9652595 A JP 9652595A JP H08291711 A JPH08291711 A JP H08291711A
Authority
JP
Japan
Prior art keywords
air
engine
mpu
pipe
throat
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
Application number
JP9652595A
Other languages
Japanese (ja)
Inventor
Yusuke Kihara
裕介 木原
Ryuhei Kawabe
隆平 川部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9652595A priority Critical patent/JPH08291711A/en
Publication of JPH08291711A publication Critical patent/JPH08291711A/en
Pending legal-status Critical Current

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  • Jet Pumps And Other Pumps (AREA)

Abstract

PURPOSE: To prevent temperature rise of an MPU, shorten a wiring for simplification, and improve maintenanceability by arranging the MPU inside a cooling pipe through which air flows, and connecting one end of the cooling pipe with a jet pump. CONSTITUTION: A cooling pipe 4 is arranged on an upper side of a car engine 1, while a microprocessor (MPU) 5 is arranged inside. An up-standing pipe 6 is arranged on the side of the engine, while a fin 7 is arranged on a lower portion of the up-standing pipe. When the engine is stopped, its remaining heat is transmitted to the fin 7 for heating air therearound. The heated air becomes ascending air current and passes through the up-standing pipe 6. A leading end of the up-standing pipe 6 is connected to a nozzle 8, while a leading end of the nozzle is projected into an inlet of a throat 9. When the air flow from the up-standing pipe 6 is spouted from the nozzle 8, air flow passes through the throat 9. Thus the throat 9 shows negative pressure in respect to a diffuser 10. Air in the cooling pipe 4 is suctioned into the throat 9, and then the air shows flow motion to cool the MPU 5.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はエンジンルームにマイク
ロプロセッサ(以下MPU)を搭載した自動車エンジン
に係り、特に、内燃機関が停止することによって冷却系
も停止し、内燃機関停止後の余熱からMPUを守るため
に冷却する内燃機関の冷却装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile engine equipped with a microprocessor (hereinafter referred to as MPU) in an engine room, and in particular, when the internal combustion engine is stopped, the cooling system is also stopped, and MPU is removed from the residual heat after the internal combustion engine is stopped. The present invention relates to a cooling device for an internal combustion engine that cools to protect the engine.

【0002】[0002]

【従来の技術】自動車のMPUによる制御が進み、エン
ジンの回転数によってインジェクタの燃料噴射量やタイ
ミングを変えたり、バルブの開閉時間を変化させるとい
うことが可能になり、燃費の向上や排気ガスの清浄化が
行えるようになったが、それにつれて電子部品が増え配
線が複雑になった。インジェクタやバルブなどを制御す
るにはMPUをエンジン近くに配置すれば配線が短く構
造も簡単にできるのだがエンジンを停止した後に冷却フ
ァンやラジエータなども停止するためエンジンの余熱が
伝わりMPUが高温になって故障するおそれがある。そ
のために配線を長くとってMPUを自動車室内に配置し
ている。しかし、この方法では配線が長くなってしまう
ことと、複雑になってメインテナンス性が悪くなるとい
う問題がある。
2. Description of the Related Art MPU control of automobiles has advanced, and it has become possible to change the fuel injection amount and timing of injectors and the opening / closing time of valves depending on the engine speed, thereby improving fuel efficiency and exhaust gas emission. Although cleaning has become possible, the number of electronic components has increased and wiring has become complicated. To control the injectors and valves, if the MPU is placed near the engine, the wiring can be shortened and the structure can be simplified, but after the engine is stopped, the cooling fan and radiator are also stopped, so the engine residual heat is transmitted and the MPU becomes hot. There is a risk of failure. Therefore, the wiring is taken long and the MPU is arranged in the automobile compartment. However, this method has problems that the wiring becomes long and the wiring becomes complicated and the maintainability deteriorates.

【0003】[0003]

【発明が解決しようとする課題】本発明の目的は、エン
ジンルームにMPUを配置したときに内燃機関が停止
し、冷却ファンなどの冷却系も停止したときにエンジン
より伝わる余熱からMPUを守り、エンジンの余熱によ
りMPUが加熱される問題を解決し、エンジンルームに
MPUを配置することを可能とすることにある。
An object of the present invention is to protect the MPU from the residual heat transmitted from the engine when the internal combustion engine stops when the MPU is arranged in the engine room and the cooling system such as a cooling fan also stops, It is to solve the problem that the MPU is heated by the residual heat of the engine and to allow the MPU to be placed in the engine room.

【0004】解決する1つの方法として、MPUを直接
気流の自然循環により冷却することが考えられるが、メ
インテナンス性を考えるとMPUはエンジンルームの上
部に取り付けざるをえず、自然循環では直接冷却できな
い。
One possible solution is to cool the MPU directly by natural circulation of the air flow. However, considering maintenance, the MPU must be installed above the engine room and cannot be cooled directly by natural circulation. .

【0005】[0005]

【課題を解決するための手段】上記の課題を解決するた
めに、本発明では、MPUを気流の流れる冷却パイプ中
に設置し、この冷却パイプの一端をジェットポンプに接
続し、もう一端は空間に開口させている。エンジンの横
に立てて設けられた上昇管の空気にエンジンの余熱を伝
える加熱部をエンジンに設置し、エンジンの余熱によっ
て加熱された空気がジェットポンプのノズルから噴出す
るように上昇管の先端をノズルと接続している。ジェッ
トポンプはノズル,スロート,ディフューザを備えてい
る。スロート入口は冷却パイプと上昇管からのノズルが
接続されていて、ノズルから空気を噴出することによっ
て冷却パイプの空気を吸い込み、冷却パイプ、すなわち
MPU廻りに空気を流動させる構造とする。
In order to solve the above problems, in the present invention, an MPU is installed in a cooling pipe through which an air flow flows, one end of this cooling pipe is connected to a jet pump, and the other end is a space. It is opened to. A heating unit is installed on the engine to convey the residual heat of the engine to the air in the rising pipe that is set up next to the engine, and the tip of the rising pipe is installed so that the air heated by the residual heat of the engine is ejected from the nozzle of the jet pump. It is connected to the nozzle. The jet pump is equipped with a nozzle, throat, and diffuser. The throat inlet has a structure in which a cooling pipe and a nozzle from an ascending pipe are connected, and the air in the cooling pipe is sucked by ejecting the air from the nozzle so that the air flows around the cooling pipe, that is, the MPU.

【0006】[0006]

【作用】自動車が走行中は冷却ファンやラジエータなど
の冷却系、また走行による気流によってエンジンは冷却
されるため、MPUは加熱されることはないが、エンジ
ンが停止すると冷却系,気流も停止し冷却されなくな
る。エンジンの横に立てて設けられた上昇管には、エン
ジンの余熱を利用して空気を加熱する加熱部によって加
熱された空気が上昇気流となって通過していく。上昇管
の上部にはノズル,スロート部,ディフューザ部を備え
たジェットポンプが設置されており、ノズルと上昇管は
接続されている。スロート部入口は、ノズルの先端が突
き出しており、またMPUの設置された冷却パイプと接
続されている。冷却パイプの一端はジェットポンプと接
続されているが、もう一端は空間に開口し空気を取り入
れることができるようにしている。上昇管を通り加速さ
れた上昇気流をノズルから高速で噴出すると、冷却パイ
プから空気を吸い込み、スロート部で混合されディフュ
ーザ部に流れていき、ディフューザ部で流れのもつ速度
エネルギを圧力に変換される。こうして冷却パイプの空
気をジェットポンプにより吸い込むことによってエンジ
ン停止後もMPU廻りに空気の流動をおこないMPUが
加熱されるのを防いでいる。
The MPU is not heated because the engine is cooled by the cooling system such as a cooling fan and a radiator while the vehicle is running, and the air flow generated by the running, but when the engine is stopped, the cooling system and the air flow are also stopped. It will not be cooled. The air heated by the heating unit that heats the air by utilizing the residual heat of the engine passes as an ascending airflow through the rising pipe provided upright next to the engine. A jet pump equipped with a nozzle, a throat part, and a diffuser part is installed above the rising pipe, and the nozzle and the rising pipe are connected. The tip of the nozzle projects from the inlet of the throat portion, and is connected to the cooling pipe in which the MPU is installed. One end of the cooling pipe is connected to the jet pump, while the other end is open to the space to allow air intake. When the accelerated ascending airflow is ejected from the nozzle at high speed through the ascending pipe, the air is sucked from the cooling pipe, mixed in the throat part and flows into the diffuser part, and the velocity energy of the flow is converted into pressure in the diffuser part. . In this way, the air in the cooling pipe is sucked in by the jet pump to prevent the MPU from being heated by causing the air to flow around the MPU even after the engine is stopped.

【0007】[0007]

【実施例】本発明の実施例を図1を用いて説明する。自
動車エンジン1の前部には冷却ファン2とラジエータ
3、上部には冷却パイプ4を設けており内部にはMPU
5が配置されている。自動車が走行中は冷却ファンによ
って気流が生じるため冷却されるのでMPUが加熱され
ることはない。しかし、エンジンが停止すると冷却ファ
ンも止まり気流が発生しなくなりエンジンの余熱がMP
Uに伝えられるようになる。
EXAMPLE An example of the present invention will be described with reference to FIG. A cooling fan 2 and a radiator 3 are provided at the front of the automobile engine 1, and a cooling pipe 4 is provided at the upper part of the automobile engine 1, and the MPU is provided inside.
5 are arranged. While the vehicle is running, the cooling fan generates an air flow, which cools the MPU and prevents the MPU from being heated. However, when the engine stops, the cooling fan also stops and the air flow does not occur
It will be transmitted to U.

【0008】エンジンの横に上昇管6が立てて設けられ
ており、上昇管の下部にはエンジンの余熱を空気に伝熱
するフィン7が配置されている。エンジンが停止すると
エンジンの余熱はフィンへ伝熱し、周辺の空気を加熱す
る。加熱された空気は上昇気流となり上昇管を通過して
いく。上昇管の上部にはノズル8,スロート部9,ディ
フューザ部10を備えたジェットポンプが設置されてお
り、上昇管の先端はノズルと接続されていて、ノズルの
先端はスロート部の入口に突き出しており、冷却パイプ
の一端と接続されている。冷却パイプのもう一端は、前
方の空間に開口しており空気を取り入れることができる
ようになっている。また、スロート部の断面積はノズル
の断面積よりも広くとっている。上昇管からの気流をノ
ズルから噴出すると、スロート部に気流が流れるため冷
却パイプの空気もスロート部に吸い込まれる。混合され
た気流はスロート部,ディフューザ部を通って外部へ抜
ける。ディフューザ部で流れのもつ速度エネルギは圧力
に変換され、スロート部はディフューザ部に対し負圧に
なり、冷却パイプの空気をスロート部へ吸い込むことに
よってMPU廻りに空気の流動をおこないMPUを冷却
する。
A rising pipe 6 is provided upright next to the engine, and fins 7 for transferring the residual heat of the engine to the air are arranged below the rising pipe. When the engine stops, the residual heat of the engine is transferred to the fins and heats the surrounding air. The heated air becomes an ascending airflow and passes through the ascending pipe. A jet pump equipped with a nozzle 8, a throat portion 9, and a diffuser portion 10 is installed above the rising pipe. The tip of the rising pipe is connected to the nozzle, and the tip of the nozzle projects to the inlet of the throat portion. And is connected to one end of the cooling pipe. The other end of the cooling pipe is open to the space in the front so that air can be taken in. Further, the cross-sectional area of the throat portion is set wider than that of the nozzle. When the airflow from the rising pipe is ejected from the nozzle, the airflow flows to the throat portion, so that the air in the cooling pipe is also sucked into the throat portion. The mixed airflow goes out through the throat and diffuser. The velocity energy of the flow in the diffuser section is converted into pressure, and the throat section becomes a negative pressure with respect to the diffuser section. By sucking the air in the cooling pipe into the throat section, the air flows around the MPU to cool the MPU.

【0009】[0009]

【発明の効果】本発明によれば、冷却パイプに気流を発
生させ、MPUを冷却することができる。このことによ
って、エンジンルームにMPUを搭載した自動車エンジ
ンにおいて、エンジンを停止させた時、エンジンの余熱
がMPUに伝熱するのを防ぎ、エンジンルームにMPU
を搭載することを可能にする。
According to the present invention, an air flow can be generated in the cooling pipe to cool the MPU. As a result, in an automobile engine equipped with an MPU in the engine room, when the engine is stopped, the residual heat of the engine is prevented from being transferred to the MPU, and the MPU is installed in the engine room.
It is possible to install.

【図面の簡単な説明】[Brief description of drawings]

【図1】内燃機関の冷却装置の説明図。FIG. 1 is an explanatory diagram of a cooling device for an internal combustion engine.

【符号の説明】[Explanation of symbols]

6…上昇管、7…加熱部、8…ノズル、9…スロート
部、10…ディフューザ部。
6 ... Ascending pipe, 7 ... Heating part, 8 ... Nozzle, 9 ... Throat part, 10 ... Diffuser part.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】エンジンルームにマイクロプロセッサを搭
載した自動車エンジンにおいて、前記自動車エンジンの
余熱で加熱されることによって発生する上昇気流が流れ
る上昇管と,空気に前記自動車エンジンの余熱を伝える
加熱部,前記マイクロプロセッサを冷却する空気が流れ
る冷却パイプを設け、上昇管の先端がノズルとなり上昇
気流を噴出し、スロート部へ前記冷却パイプからの空気
を吸込むことによって前記冷却パイプに気流を発生さ
せ、前記マイクロプロセッサを冷却することができるジ
ェットポンプを有する構造を特徴とする内燃機関の冷却
装置。
1. In an automobile engine having a microprocessor installed in an engine room, an ascending pipe through which an ascending air current generated by being heated by residual heat of the automobile engine flows, and a heating unit for transmitting the residual heat of the automobile engine to air. A cooling pipe is provided through which air for cooling the microprocessor is provided, and the tip of the ascending pipe serves as a nozzle to eject an ascending air flow, and the air from the cooling pipe is sucked into the throat portion to generate an air flow in the cooling pipe. A cooling device for an internal combustion engine, characterized by a structure having a jet pump capable of cooling a microprocessor.
JP9652595A 1995-04-21 1995-04-21 Cooling device for internal combustion engine Pending JPH08291711A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9652595A JPH08291711A (en) 1995-04-21 1995-04-21 Cooling device for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9652595A JPH08291711A (en) 1995-04-21 1995-04-21 Cooling device for internal combustion engine

Publications (1)

Publication Number Publication Date
JPH08291711A true JPH08291711A (en) 1996-11-05

Family

ID=14167563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9652595A Pending JPH08291711A (en) 1995-04-21 1995-04-21 Cooling device for internal combustion engine

Country Status (1)

Country Link
JP (1) JPH08291711A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002053893A1 (en) * 2000-12-27 2002-07-11 Nissan Motor Co., Ltd. Vehicle structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002053893A1 (en) * 2000-12-27 2002-07-11 Nissan Motor Co., Ltd. Vehicle structure
US6901890B2 (en) 2000-12-27 2005-06-07 Nissan Motor Co., Ltd. Vehicle structure

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