JPH0584813B2 - - Google Patents
Info
- Publication number
- JPH0584813B2 JPH0584813B2 JP30971186A JP30971186A JPH0584813B2 JP H0584813 B2 JPH0584813 B2 JP H0584813B2 JP 30971186 A JP30971186 A JP 30971186A JP 30971186 A JP30971186 A JP 30971186A JP H0584813 B2 JPH0584813 B2 JP H0584813B2
- Authority
- JP
- Japan
- Prior art keywords
- engine
- cooling fan
- cooling
- water temperature
- control means
- 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 - Lifetime
Links
- 238000001816 cooling Methods 0.000 claims description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000000498 cooling water Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/06—Cleaning; Combating corrosion
- F01P2011/063—Cleaning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/04—Pump-driving arrangements
- F01P5/043—Pump reversing arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、エンジンラジエータに対する冷却用
空気を供給する冷却フアンが正転、停止、逆転を
自動的に繰り返すように制御する冷却フアン制御
手段を設けると共に、前記エンジンラジエータの
冷却水温を検出する水温センサを設け、前記水温
センサの検出情報に基づいて前記エンジンラジエ
ータの水温が設定温度以上に上昇するに伴つて、
エンジンを自動的に停止させるエンジン停止制御
手段を設けた作業車用のエンジン冷却装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides a cooling fan control means that controls a cooling fan that supplies cooling air to an engine radiator to automatically repeat normal rotation, stop, and reverse rotation. In addition, a water temperature sensor is provided to detect the cooling water temperature of the engine radiator, and as the water temperature of the engine radiator rises above a set temperature based on the detection information of the water temperature sensor,
The present invention relates to an engine cooling device for a working vehicle, which is provided with an engine stop control means for automatically stopping the engine.
上記この種の作業車用のエンジン冷却装置は、
作業に伴つて発生する粉塵等が冷却フアンにて冷
却空気と共に供給されて、エンジンラジエータや
その防塵網等に付着して冷却効果が低下すること
を防止するために、冷却フアンが正転、停止、逆
転を自動的に繰り返すようにしたものである（実
開昭61−12930号公報参照）。
The engine cooling system for this type of work vehicle mentioned above is
In order to prevent dust generated during work from being supplied with cooling air by the cooling fan and adhering to the engine radiator or its dustproof net, reducing the cooling effect, the cooling fan rotates normally and then stops. , the reversal is automatically repeated (see Japanese Utility Model Application No. 61-12930).
但し、エンジンラジエータの冷却水温が設定温
度以上に上昇した場合には、エンジン停止制御手
段にてエンジンを自動的に停止させることによ
り、オーバーヒートを防止することとなる。 However, if the cooling water temperature of the engine radiator rises above the set temperature, the engine is automatically stopped by the engine stop control means to prevent overheating.
しかしながら、上記従来構成においては、冷却
フアン制御手段とエンジン停止制御手段との間に
関連性がなかつたので、以下に示すような不都合
があり改善の余地があつた。
However, in the above-mentioned conventional configuration, there was no relationship between the cooling fan control means and the engine stop control means, so there were the following disadvantages and there was room for improvement.
すなわち、エンジンラジエータは、冷却フアン
が正転作動している場合に、その冷却効果が高く
なるように構成されているものである。従つて、
冷却フアンが停止状態や逆転状態にある場合は、
冷却効果が、正転作動時よりも低下する状態とな
る。 That is, the engine radiator is configured so that its cooling effect is enhanced when the cooling fan is operating in normal rotation. Therefore,
If the cooling fan is stopped or reversed,
The cooling effect becomes lower than during normal rotation operation.
その結果、冷却水温の変化を見ると、冷却フア
ンの停止状態や逆転状態において上昇する傾向と
なり、そして、正転作動を開始するに伴つて下降
し、その後、正転作動の開始から所定時間経過し
たのち正転作動を終了するまでは略一定の温度と
なる。このため、エンジンを長時間運転した場合
や、外気温が高い場合等には、冷却フアンの停止
状態や逆転状態、及び、正転作動を開始してから
所定時間経過するまでの間において、冷却水温
が、オーバーヒートを防止するための設定温度以
上になつて、不必要にエンジンが停止する虞れが
あつた。 As a result, when looking at changes in the cooling water temperature, it tends to rise when the cooling fan is stopped or reversed, then decreases when normal rotation starts, and then after a predetermined period of time has elapsed since the start of normal rotation. Thereafter, the temperature remains approximately constant until the normal rotation operation ends. Therefore, when the engine has been operated for a long time or when the outside temperature is high, the cooling fan will not be cooled when it is stopped or in reverse, or until a predetermined period of time has elapsed after starting forward rotation. There was a risk that the engine would stop unnecessarily if the water temperature exceeded the set temperature to prevent overheating.
本発明は、上記実情に鑑みてなされたものであ
つて、その目的は、冷却フアンの正転、停止、逆
転の作動に伴う冷却水温の上昇によつて、エンジ
ン停止手段が誤作動することを防止する点にあ
る。 The present invention has been made in view of the above-mentioned circumstances, and its purpose is to prevent the engine stop means from malfunctioning due to the rise in cooling water temperature caused by forward rotation, stoppage, and reverse rotation of the cooling fan. The point is to prevent it.
本発明による作業車用のエンジン冷却装置の特
徴構成は、前記エンジン停止制御手段を、前記冷
却フアンが正転作動を開始したのち所定時間経過
した時点から正転作動を停止させる時点までの間
でのみ、エンジン停止作動を行うように構成して
ある点にあり、その作用並びに効果は以下の通り
である。
The characteristic configuration of the engine cooling device for a work vehicle according to the present invention is such that the engine stop control means is configured to control the engine stop control means from the time when a predetermined period of time has elapsed after the cooling fan starts normal rotation operation to the time when the normal rotation operation is stopped. The only difference is that the engine is configured to stop the engine, and its functions and effects are as follows.
すなわち、冷却フアンの停止、逆転、及び、正
転作動を開始したのち所定時間経過した時点まで
の間は、水温センサによる検出水温が設定温度以
上になつても、エンジンを停止させないようにす
るのである。
In other words, even if the water temperature detected by the water temperature sensor exceeds the set temperature, the engine will not be stopped until a predetermined period of time has elapsed after the cooling fan stops, reverses, or starts rotating forward. be.
尚、冷却フアンの停止、逆転、及び、正転作動
を開始したのち所定時間経過した時点までの間に
おいて、エンジンを停止させないようにしても、
オーバーヒート状態になつたために冷却水温が上
昇した場合は、冷却フアンの正転作動中におい
て、エンジン停止制御手段が正常に作動すること
となり、問題とはならない。 Furthermore, even if the engine is not stopped until a predetermined period of time has elapsed after the cooling fan has stopped, reversed, or started to rotate forward,
If the cooling water temperature rises due to overheating, the engine stop control means will operate normally during normal rotation of the cooling fan, and this will not be a problem.
従つて、冷却フアンの正転、停止、逆転の繰り
返しに伴つて上昇する水温によつて、エンジンが
不必要に停止される虞れを回避できるに至つた。
Therefore, it has become possible to avoid the possibility that the engine will be stopped unnecessarily due to the water temperature rising as the cooling fan is repeatedly rotated forward, stopped, and reversed.
以下、本発明の実施例を図面に基づいて説明す
る。
Embodiments of the present invention will be described below based on the drawings.
第４図に示すように、左右一対の前後輪１，２
を備えた車体Ｖの下腹部に、芝刈り装置３を、昇
降用のシリンダ４にて上下動自在に懸架すると共
に、前記車体Ｖの前方側に、エンジンＥを搭載
し、且つ、後方側に、搭乗運転部５、及び、ステ
アリングハンドル６を設けて、芝や雑草等の刈取
作業に用いる作業車を構成してある。 As shown in Fig. 4, a pair of left and right front and rear wheels 1, 2
A lawn mowing device 3 is suspended on the lower abdomen of a vehicle body V equipped with a cylinder 4 for vertical movement, and an engine E is mounted on the front side of the vehicle body V. , a boarding and driving section 5, and a steering handle 6 are provided to constitute a work vehicle used for mowing work of grass, weeds, etc.
第１図に示すように、前記エンジンＥの前方側
に、冷却フアン７にて供給される冷却空気にて冷
却されるエンジンラジエータ８を付設してあり、
そのエンジンラジエータ８内の冷却水を、ポンプ
９にて前記エンジンＥ内に圧送循環させて、前記
エンジンＥを冷却するようにしてある。尚、図
中、１０は、前記エンジンラジエータ７の前方側
に設けられた防塵網である。 As shown in FIG. 1, an engine radiator 8 is attached to the front side of the engine E, and is cooled by cooling air supplied by a cooling fan 7.
The cooling water in the engine radiator 8 is circulated under pressure into the engine E by a pump 9 to cool the engine E. In addition, in the figure, 10 is a dustproof net provided on the front side of the engine radiator 7.
但し、前記冷却フアン７は、第３図に示すよう
に、第１設定時間（t1＝180秒）を正転した後、
第２設定時間（t2＝３秒）を停止し、且つ、第３
設定時間（t3＝６秒）を逆転した後、前記第２設
定時間（t2）を停止するシーケンスを、自動的に
繰り返すように、冷却フアン制御手段１００にて
前記冷却フアン７の駆動用モータM1の作動を制
御するように構成してある。 However, as shown in FIG. 3, after the cooling fan 7 rotates forward for the first set time (t 1 =180 seconds),
The second set time (t 2 = 3 seconds) is stopped, and the third set time is stopped.
The cooling fan control means 100 is configured to drive the cooling fan 7 so that the sequence of reversing the set time (t 3 =6 seconds) and then stopping the second set time (t 2 ) is automatically repeated. It is configured to control the operation of motor M1 .
又、前記エンジンラジエータ８とエンジンＥと
の間を循環する冷却水の水温が、設定温度以上に
上昇するに伴つて、ON信号を出力するように温
度感知式のスイツチにて構成された水温センサ１
１を設けると共に、その水温センサ１１がON作
動するに伴つて、前記エンジンＥに対する燃料供
給を遮断する燃料遮断弁１２を作動させることに
より、前記エンジンＥを自動的に停止させるエン
ジン停止制御手段１０１を設けてある。 Further, a water temperature sensor configured with a temperature sensing type switch outputs an ON signal as the temperature of the cooling water circulating between the engine radiator 8 and the engine E rises above a set temperature. 1
an engine stop control means 101 that automatically stops the engine E by operating a fuel cutoff valve 12 that cuts off fuel supply to the engine E when the water temperature sensor 11 turns on; is provided.
前記エンジン停止制御手段１０１の構成につい
て説明すれば、前記冷却フアン制御手段１００
が、前記冷却フアン７の停止状態から正転作動を
開始する状態に制御する時点に、その正転作動の
開始を示す正転信号P0を出力するように構成す
ると共に、その正転信号P0を受けて、所定時間
（60秒）経過後に、前記冷却フアン７が正転作動
状態にあることを示す遅延信号P1を出力するタ
イマ１３を設け、そして、前記水温センサ１１か
らの水温信号P2がON状態にあり、且つ、前記遅
延信号P1が出力される状態にある場合に、前記
燃料遮断弁１２を閉じ操作する電動モータM2を
駆動するための停止信号P3を出力するANDゲー
ト１４を設けてある。 To explain the configuration of the engine stop control means 101, the cooling fan control means 100
is configured to output a normal rotation signal P 0 indicating the start of the normal rotation operation at the time when the cooling fan 7 is controlled from a stopped state to a state in which normal rotation operation is started, and the normal rotation signal P A timer 13 is provided which outputs a delay signal P1 indicating that the cooling fan 7 is in the forward rotation operating state after a predetermined time (60 seconds) has passed after receiving the water temperature signal from the water temperature sensor 11. When P 2 is in the ON state and the delay signal P 1 is output, a stop signal P 3 is output for driving the electric motor M 2 that closes the fuel cutoff valve 12. An AND gate 14 is provided.
つまり、第２図に示すように、前記冷却フアン
７が逆転作動状態及び停止状態にある際に上昇す
る冷却水の水温が、正転作動を開始するに伴つて
下降し、そして、前記冷却フアン７の正転作動を
開始したのち前記所定時間（60秒）経過した時点
において安定する水温に基づいて、前記エンジン
停止制御手段１０１がエンジン停止作動を行うよ
うにすることにより、前記冷却フアン７の停止及
び逆転による冷却水の温度上昇によつて、前記エ
ンジン停止制御手段１０１が誤作動することがな
いようにしてある。 In other words, as shown in FIG. 2, the temperature of the cooling water, which rises when the cooling fan 7 is in the reverse operation state and the stopped state, decreases as the cooling fan 7 starts normal rotation operation, and then By causing the engine stop control means 101 to perform an engine stop operation based on the water temperature that becomes stable after the predetermined time (60 seconds) has elapsed after the forward rotation operation of the cooling fan 7 has started, the cooling fan 7 can be stopped. This prevents the engine stop control means 101 from malfunctioning due to an increase in the temperature of the cooling water due to stop and reverse rotation.
前記冷却フアン７の作動を制御する冷却フアン
制御手段１００について説明を加えれば、例え
ば、マイクロコンピユータを用いて、前記各設定
時間t1，t2，t3の経過を監視させると共に、前記
冷却フアン７の駆動信号を正逆転並びに停止の各
状態に切り換え制御させるように構成したり、前
記各設定時間t1，t2，t3の経過に伴つて、前記冷
却フアン７の駆動信号を正逆転並びに停止の各状
態に切り換える制御信号を出力するタイマ回路等
によつて構成することとなる。 To explain the cooling fan control means 100 that controls the operation of the cooling fan 7, for example, a microcomputer is used to monitor the passage of each of the set times t 1 , t 2 , t 3 and to control the operation of the cooling fan 7 . The drive signal for the cooling fan 7 may be configured to be controlled by switching between forward, reverse, and stop states, or the drive signal for the cooling fan 7 may be switched between forward, reverse, and stop states as the set times t 1 , t 2 , and t 3 elapse. In addition, it is constituted by a timer circuit, etc., which outputs a control signal for switching to each stop state.
上記実施例では、本発明を芝刈り用の作業車に
適用した場合を例示したが、本発明は各種の作業
車のエンジン冷却装置に適用できるものであつ
て、冷却フアン制御手段１００やエンジン停止制
御手段１０１等、各部の具体構成は各種変更でき
る。
In the above embodiment, the present invention is applied to a work vehicle for mowing lawns. The specific configuration of each part, such as the control means 101, can be changed in various ways.
尚、特許請求の範囲の項に図面との対照を便利
にするために符号を記すが、該記入により本発明
は添付図面の構造のみに限定されるものではな
い。 Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.
図面は本発明に係る作業車用のエンジン冷却装
置の実施例を示し、第１図はエンジン停止制御手
段の構成を示すブロツク図、第２図はエンジン停
止制御手段の作動と冷却水温の関係を示す説明
図、第３図は冷却フアンの作動シーケンスを示す
説明図、第４図は作業車の概略側面図である。
７……冷却フアン、８……エンジンラジエー
タ、１１……水温センサ、１００……冷却フアン
制御手段、１０１……エンジン停止制御手段。
The drawings show an embodiment of the engine cooling device for a working vehicle according to the present invention, FIG. 1 is a block diagram showing the configuration of the engine stop control means, and FIG. 2 shows the relationship between the operation of the engine stop control means and the cooling water temperature. FIG. 3 is an explanatory diagram showing the operating sequence of the cooling fan, and FIG. 4 is a schematic side view of the work vehicle. 7... Cooling fan, 8... Engine radiator, 11... Water temperature sensor, 100... Cooling fan control means, 101... Engine stop control means.
Claims (1)
供給する冷却フアン７が正転、停止、逆転を自動
的に繰り返すように制御する冷却フアン制御手段
１００を設けると共に、前記エンジンラジエータ
８の冷却水温を検出する水温センサ１１を設け、
前記水温センサ１１の検出情報に基づいて前記エ
ンジンラジエータ８の水温が設定温度以上に上昇
するに伴つて、エンジンＥを自動的に停止させる
エンジン停止制御手段１０１を設けた作業車用の
エンジン冷却装置であつて、前記エンジン停止制
御手段１０１を、前記冷却フアン７が正転作動を
開始したのち所定時間経過した時点から正転作動
を停止させる時点までの間でのみ、エンジン停止
作動を行うように構成してある作業車用のエンジ
ン冷却装置。1. Cooling fan control means 100 is provided to control the cooling fan 7 that supplies cooling air to the engine radiator 8 to automatically repeat normal rotation, stop, and reverse rotation, and a water temperature for detecting the cooling water temperature of the engine radiator 8. A sensor 11 is provided,
An engine cooling device for a working vehicle, comprising an engine stop control means 101 that automatically stops the engine E when the water temperature of the engine radiator 8 rises above a set temperature based on information detected by the water temperature sensor 11. The engine stop control means 101 is configured to perform the engine stop operation only from the time when a predetermined period of time has elapsed after the cooling fan 7 starts normal rotation operation until the time when the normal rotation operation is stopped. An engine cooling system for a working vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30971186A JPS63162919A (en) | 1986-12-25 | 1986-12-25 | Engine cooling device for working vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30971186A JPS63162919A (en) | 1986-12-25 | 1986-12-25 | Engine cooling device for working vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63162919A JPS63162919A (en) | 1988-07-06 |
| JPH0584813B2 true JPH0584813B2 (en) | 1993-12-03 |
Family
ID=17996369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30971186A Granted JPS63162919A (en) | 1986-12-25 | 1986-12-25 | Engine cooling device for working vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63162919A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20131206A1 (en) * | 2013-07-18 | 2015-01-19 | Baruffaldi Spa | EQUIPMENT FOR ROTATION CONTROL IN THE TWO SENSES OF FANS FOR COOLING THE VEHICLE REFRIGERANT FLUID |
| JP7216468B2 (en) * | 2019-12-09 | 2023-02-01 | 株式会社クボタ | water cooled engine |
-
1986
- 1986-12-25 JP JP30971186A patent/JPS63162919A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63162919A (en) | 1988-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4469053A (en) | Automotive electric fan controlling device | |
| JPH0584813B2 (en) | ||
| JPH0723534Y2 (en) | Farm vehicle | |
| JPS6456526U (en) | ||
| JPH06109048A (en) | Water-cooled type brake device | |
| JPH0623539B2 (en) | Vehicle engine cooling system | |
| JPS57191415A (en) | Cooling device of engine | |
| JP2561218B2 (en) | Vehicle engine cooling system | |
| JP3065157B2 (en) | Water heater with circulation pump | |
| JP3939488B2 (en) | Oil unit impact tool | |
| JPS6126584Y2 (en) | ||
| JPH0791976B2 (en) | Cooling fan controller | |
| JP2595116B2 (en) | Powertrain structure of work vehicle | |
| JPH0220421Y2 (en) | ||
| JP2559367Y2 (en) | Engine cooling device | |
| JP2667592B2 (en) | Work vehicle engine cooling system | |
| JPH034748Y2 (en) | ||
| KR0152419B1 (en) | A blower fan control for an automobile | |
| JPS6317685Y2 (en) | ||
| JPS62111928U (en) | ||
| JPH035981Y2 (en) | ||
| JPH0293645U (en) | ||
| KR0182753B1 (en) | A humidifier | |
| JPH03114971A (en) | Control method for electric power steering device | |
| JPH0526258Y2 (en) |