JPS63162919A - Engine cooling device for working vehicle - Google Patents
Engine cooling device for working vehicleInfo
- Publication number
- JPS63162919A JPS63162919A JP30971186A JP30971186A JPS63162919A JP S63162919 A JPS63162919 A JP S63162919A JP 30971186 A JP30971186 A JP 30971186A JP 30971186 A JP30971186 A JP 30971186A JP S63162919 A JPS63162919 A JP S63162919A
- Authority
- JP
- Japan
- Prior art keywords
- engine
- cooling fan
- water temperature
- cooling
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000498 cooling water Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 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
- 239000000428 dust Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 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)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、゛エンジンラジェータに対する冷却用空気を
供給する冷却ファンが正転、停止、逆転を自動的に繰り
返すように制御する冷却ファン制御手段を設けると共に
、前記エンジンラジェ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
エンジンラジェータの水温が設定温度以上に上昇するに
伴って、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 [Industrial Application Field] The present invention provides a cooling fan control means for controlling a cooling fan that supplies cooling air to an engine radiator to automatically repeat normal rotation, stop, and reverse rotation. and a water temperature sensor for detecting the cooling water temperature of the engine radiator, and automatically stops the engine when 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 equipped with an engine stop control means.
上記この種の作業車用のエンジン冷却装置は、作業に伴
って発生する粉塵等が冷却ファンにて冷却空気と共に供
給されて、エンジンラジェ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、冷却ファ
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（実願昭５９−９８３１８号参照）。In the above-mentioned engine cooling system for this type of work vehicle, dust generated during work is supplied together with cooling air by a cooling fan, and it adheres to the engine radiator and its dustproof net, reducing the cooling effect. In order to prevent this, the cooling fan is designed to automatically repeat forward rotation, stop, and reverse rotation (see Utility Model Application No. 59-98318).
但し、エンジンラジェ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 engine radiator cooling water temperature 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、冷却ファン制
御手段とエンジン停止制御手段との間に関連性がなかっ
たので、以下に示すような不都合があり改善の余地があ
った。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、エンジンラジェータは、冷却ファンが正転作
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。従って、冷却ファンが停止状態
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, when the cooling fan is in a stopped state or in a reverse rotation state, the cooling effect is lower than when the cooling fan is in normal rotation.
その結果、冷却水温の変化を見ると、冷却ファンの停止
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って下降し、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、冷却ファン
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°なって、
不必要にエンジンが停止する虞れがあった。As a result, when looking at changes in cooling water temperature, it tends to rise when the cooling fan is stopped or reversed, and
The temperature decreases as the normal rotation operation starts, and then remains approximately constant until the normal rotation operation ends after a predetermined period of time has elapsed from the start of the normal rotation operation. Therefore, when the engine is operated for a long time or when the outside temperature is high, the cooling fan is stopped or reversed, and the cooling fan is not cooled until a predetermined period of time has elapsed after starting forward rotation. If the water temperature exceeds the set temperature to prevent overheating,
There was a risk that the engine would stop unnecessarily.
本発明は、上記実情に鑑みてなされたものであって、−
その目的は、冷却ファンの正転、停止、逆転の作動に伴
う冷却水温の上昇によって、エンジン停止手段が誤作動
することを防止する点。The present invention has been made in view of the above circumstances, and includes-
The purpose of this is to prevent the engine stop means from malfunctioning due to the rise in cooling water temperature that occurs when the cooling fan rotates forward, stops, or reverses.
にある。It is in.
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、前記冷却ファンが正転
作動を開始したのぢ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 the cooling fan starts normal rotation operation for a predetermined period of time to the time when the normal rotation operation is stopped. Only in this case, the engine is stopped, and its functions and effects are as follows.
すなわち、冷却ファンの停止、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っても、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 normal rotation. be.
尚、冷却ファンの停止、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
なったために冷却水温が上昇した場合は、冷却ファンの
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。In addition, even if you do not stop the engine until a predetermined period of time has elapsed after the cooling fan stopped, reversed, or started normal rotation, if the cooling water temperature rises due to overheating, During normal rotation of the cooling fan, the engine stop control means operates normally, and no problem arises.
従って、冷却ファンの正転、停止、逆転の繰り返しに伴
って上昇する水温によって、エンジンが不必要に停止さ
れる虞れを回避できるに至った。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 repeatedly rotates forward, stops, and reverses.
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）。As shown in Fig. 4, a pair of left and right front and rear wheels (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）にて上下動自在に縣架す
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。The lawn mowing device (3) is attached to the lower abdomen of the vehicle body (V) equipped with (2).
) are suspended vertically movably by a lifting cylinder (4), and an engine (E) is mounted on the front side of the vehicle body (V).
and, on the rear side, a boarding operation section (5), and
A steering handle (6) is provided to constitute a work vehicle used for cutting grass, weeds, etc.
第１図に示すように、前記エンジン（Ｅ）の前方側に、
冷却ファン（７）にて供給される冷却空気にて冷却され
るエンジンラジェータ（８）を付設してあり、そのエン
ジンラジェータ（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、前記エンジンラジェータ（７）の前方側に設けられ
た防塵網である。As shown in FIG. 1, on the front side of the engine (E),
An engine radiator (8) is attached which is cooled by cooling air supplied by a cooling fan (7), and the cooling water in the engine radiator (8) is pumped to the engine (E) by a pump (9). ) to cool the engine (E). In addition, (10) in the figure
is a dustproof screen provided on the front side of the engine radiator (7).
但し、前記冷却ファン（７）は、第３図に示すように、
第１設定時間ｏ、＝ｔ８０秒）を正転した後、第２設定
時間（ｔｚ＝３秒）を停止し、且つ、第３設定時間（ｔ
ｉ・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
ファン制御手段（１００）にて前記冷却ファン（７）の
駆動用モータ（Ｍｌ）の作動を制御するように構成して
ある。However, as shown in FIG. 3, the cooling fan (7)
After the first set time o, = t80 seconds), the second set time (tz = 3 seconds) is stopped, and the third set time (t
The cooling fan control means (100) controls the driving motor of the cooling fan (7) so as to automatically repeat the sequence of reversing the second set time (t2) and then stopping the second set time (t2). (Ml).
又、前記エンジンラジェータ（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
るに伴って、ＯＮ信号を出力するように温度感知式のス
イッチにて構成された水温センサ（１１）を設けると共
に、その水温センサ（１１）がＯＮ作動するに伴って、
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（
Ｂ）を自動的に停止させるエンジン停止制御手段（１０
１）を設けである。Further, it is configured with a temperature sensing type switch so as to output an ON signal when the temperature of the cooling water circulating between the engine radiator (8) and the engine (E) rises above a set temperature. A water temperature sensor (11) is provided, and as the water temperature sensor (11) is turned on,
By operating a fuel cutoff valve (12) that cuts off fuel supply to the engine (E), the engine (E)
Engine stop control means (10
1) 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、前記冷却ファン制御手段（１００）が、前記
冷却ファン（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（Ｐｏ）を出力するように構成すると共に、その正転
信号（Ｐ６）を受けて、所定時間（６０秒）経過後に、
前記冷却ファン（７）が正転作動状態にあることを示す
遅延信号（ｐ＋）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（Ｐｇ）
がＯＮ状態にあり、且つ、前記遅延信号（Ｐｌ）力乏出
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（Ｍりを駆動するための停市信
号（Ｐ３）を出力するＡＮＤゲー） （１４）を設けて
あ ゛る。To explain the configuration of the engine stop control means (101), at the time when the cooling fan control means (100) controls the cooling fan (7) from a stopped state to a state where normal rotation operation is started, the engine stop control means (101) It is configured to output a forward rotation signal (Po) indicating the start of rotation operation, and after receiving the forward rotation signal (P6), after a predetermined time (60 seconds) has elapsed,
A timer (13) is provided that outputs a delay signal (p+) indicating that the cooling fan (7) is in a forward rotation operating state, and a water temperature signal (Pg) from the water temperature sensor (11) is provided.
is in the ON state and the delay signal (Pl) is insufficiently output, the electric motor (stop signal (for driving the M)) that closes the fuel cutoff valve (12) is activated. An AND game (14) that outputs P3) is provided.
つまり、第２図に示すように、前記冷却ファン（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って下降し、そして、
前記冷却ファン（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
ァン（７）の停止及び逆転による冷却水の温度上昇によ
って、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。That is, 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
The engine stop control means (101) performs the engine stop operation based on the water temperature that becomes stable after the predetermined time (60 seconds) has elapsed after the cooling fan (7) started normal rotation operation. This prevents the engine stop control means (101) from malfunctioning due to an increase in the temperature of the cooling water due to the stoppage and reverse rotation of the cooling fan (7).
前記冷却ファン（７）の作動を制御する冷却ファン制御
手段（１００）について説明を加えれば、例えば、マイ
クロコンピュータを用いて、前記各設定時間（ｔ＋）、
（ｔｚ） 、 （ｔｓ）の経過を監視させると共に、
前記冷却ファン（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（ｔ＋）、 （ｔｚ） 。To explain the cooling fan control means (100) that controls the operation of the cooling fan (7), for example, using a microcomputer, each of the set times (t+),
While monitoring the progress of (tz) and (ts),
The drive signal for the cooling fan (7) is configured to be controlled by switching between forward, reverse, and stop states, and the respective set times (t+) and (tz) are controlled.
（Ｌ３）の経過に伴って、前記冷却ファン（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って構成することとなる。As (L3) progresses, a timer circuit or the like is used to output a control signal for switching the drive signal of the cooling fan (7) between forward, reverse, and stop states.
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って、冷却ファン制御手段
（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, but the present invention can also be applied to engine cooling devices for various work vehicles, such as cooling fan control means (100), The specific configuration of each part, such as the engine stop 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, reference numerals are included in the claims section for convenient comparison with the drawings, but 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
すブロック図、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図は冷却ファンの作
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）・・・・・・冷却ファン、（８）・・・・・・エ
ンジンラジェータ、（１１）・・・・・・水温センサ、
（１００）・・・・・・冷却ファン制御手段、（１０
１）・・・・・・エンジン停止制御手段。The drawings show an embodiment of the engine cooling device for a work 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, (10
1)...Engine stop control means.
Claims (1)
る冷却ファン（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ァン制御手段（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って、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っ
て、前記エンジン停止制御手段（１０１）を、前記冷却
ファン（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。A cooling fan control means (100) is provided to control a cooling fan (7) that supplies cooling air to the engine radiator (8) to automatically repeat normal rotation, stop, and reverse rotation, and the engine radiator (8) A water temperature sensor (11) is provided to detect the cooling water temperature of the engine (E), and as the water temperature of the engine radiator (8) rises above the set temperature based on the detection information of the water temperature sensor (11), the engine (E) is stopped. An engine cooling device for a work vehicle, which is provided with an engine stop control means (101) for automatically stopping the engine, the engine stop control means (101) being operated after the cooling fan (7) starts normal rotation operation. Only from the time when the predetermined time has elapsed until the time when forward rotation operation is stopped.
An engine cooling system for a work vehicle configured to perform an engine stop operation.
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 true JPS63162919A (en) | 1988-07-06 |
| JPH0584813B2 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) |
Cited By (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 |
| JP2021092169A (en) * | 2019-12-09 | 2021-06-17 | 株式会社クボタ | Water-cooled engine |
-
1986
- 1986-12-25 JP JP30971186A patent/JPS63162919A/en active Granted
Cited By (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 |
| JP2021092169A (en) * | 2019-12-09 | 2021-06-17 | 株式会社クボタ | Water-cooled engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0584813B2 (en) | 1993-12-03 |
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