JPS60169623A - Cooling device for water-cooled engine - Google Patents
Cooling device for water-cooled engineInfo
- Publication number
- JPS60169623A JPS60169623A JP2678284A JP2678284A JPS60169623A JP S60169623 A JPS60169623 A JP S60169623A JP 2678284 A JP2678284 A JP 2678284A JP 2678284 A JP2678284 A JP 2678284A JP S60169623 A JPS60169623 A JP S60169623A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- water temperature
- temperature
- engine
- control
- 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
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
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
-
- 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
- F01P2023/00—Signal processing; Details thereof
-
- 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
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/13—Ambient 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
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/30—Engine incoming fluid 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
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/32—Engine outcoming fluid 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
- F01P2025/00—Measuring
- F01P2025/60—Operating parameters
- F01P2025/62—Load
-
- 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
- F01P2025/00—Measuring
- F01P2025/60—Operating parameters
- F01P2025/64—Number of revolutions
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (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）
本発明は水冷式エンジンの冷ＩＪＪ装侃、特にニンジン
に流入する流入冷却水の温度に応じて適切に冷却制御覆
るようにした冷却装置に関Ｊる。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cooling IJJ system for a water-cooled engine, and particularly to a cooling device that appropriately controls cooling according to the temperature of inflow cooling water flowing into a carrot. Seki Juru.
（従 来 技 術）
エンジンの冷却方式としては、低温の冷却水をシリンダ
周囲のウォーターシャグツ１〜に供給すると共に、該シ
リンダを冷却でることによって高温となった冷却水をラ
ジェータに供給し、該ウジュータによって低温に冷却し
た土ぐ１ｑびウォータージャケットに供給するようにし
た冷却水循環式の方式が広く採用されている。(Prior art) As an engine cooling method, low-temperature cooling water is supplied to the water shafts 1~ around the cylinder, and cooling water that has become high temperature by cooling the cylinder is supplied to the radiator. A cooling water circulation system in which the soil is cooled to a low temperature by the cooling water tank and is supplied to the water jacket is widely used.
この冷却方式においでは、冷却水の循環通路における１
゛モ
の開閉弁を備え、冷却水温に応じて該開閉弁の開度を増
減さけることにより冷却水の循環Φを制御して、エンジ
ン出口部における冷却水温を所定値に保持り−るように
なっているが、このにうな冷却水温の制御においては所
謂応答遅れとハンチングの問題があり、次のような不具
合が生じる。つまリ、応答遅れを少なく覆るためには上
記開閉弁の動作速度を速くし、冷却水湿が所定値より高
い場合に冷却水の循ＩＩ爵を速かに増加さけるようにす
ればよいが、このようにすると二しンジンに流入する冷
５１水の温度が外気温等との関係で低い場合にエンジン
が急激に冷却されて冷７ｄｌ水温が所定値以下に大きく
アンターン：Ｊ−１−りることになり、これに伴って大
きな振幅のハンチングが生じることになる。また、この
ハンチングを軽減−りる／ｊめには１．記聞閉弁の動作
速度を遅くづ”ればよいが、そう覆ると制御の応答遅れ
が著しくなっＣ１冷却水温が高い場合に所定値まで低下
づるのに長時間を要づることになり、そのため例えば］
ニンジンが高負荷状態にあって発熱量が大きい時にエン
ジンがＡ−バーヒートリ−る危険性が生じる。In this cooling method, one
The cooling water circulation Φ is controlled by increasing or decreasing the opening degree of the opening/closing valve according to the cooling water temperature, and the cooling water temperature at the engine outlet is maintained at a predetermined value. However, in this type of cooling water temperature control, there are problems of so-called response delay and hunting, resulting in the following problems. In other words, in order to minimize the response delay, the operating speed of the above-mentioned on-off valve should be increased, and when the humidity of the cooling water is higher than a predetermined value, the circulation of the cooling water should be rapidly increased. In this way, if the temperature of the cold 51 water flowing into the second engine is low due to the outside temperature, etc., the engine will be rapidly cooled and the cold 7 dl water temperature will be significantly lowered to below the predetermined value. As a result, large-amplitude hunting occurs. Also, to reduce this hunting, 1. It would be better to slow down the operation speed of the recording/closing valve, but if you do so, the response delay of the control will be significant, and if the C1 cooling water temperature is high, it will take a long time to drop to the predetermined value. ]
When the carrot is under high load and generates a large amount of heat, there is a risk that the engine will overheat.
ところで、水冷式エンジンの冷Ｎ１制御に関しては、例
えば特開昭５７−１６８０１７号公報に開示された発明
がある。これは、冷却水温を一定に制御しでも、」−ン
ジンの発熱量が運転状態によって変化するため、発熱量
の少ない低負荷時等に１ンジンが過冷却の状態となる問
題に着目したもので、冷却系統の冷ムＩＪ能力を規制り
る流１ｔｊ制御弁等の冷却規制装置と、シリンダ壁温度
に相関Ｊ８信号を出力するセンタど、このセンタの出力
（５一応じて上記冷却規制装置を駆動する制御回路とを
設け、該制御回路により１−記冷却規制装置を運転状態
に応じて予め設定されたテーブルに基づいて制御し、或
いはシリンダ壁温度を直接検出しＣ該温度が所定値とな
るように冷却規制装置をノイードバック制御するように
し／ｊ ｂのである。しかし、この弁明においても、上
記冷却規制装置が作動してから冷却水温ないしシリンダ
壁温が所定１ｆｆｉ ｇ： ｖ変化りるのに応答遅れが
あって、これを少なくしようとづれば、特に流入冷７Ｊ
Ｊ水温が低い場合にハンチングが著しくなるという上記
の問題が生じる。By the way, regarding cold N1 control of a water-cooled engine, there is an invention disclosed in, for example, Japanese Unexamined Patent Publication No. 168017/1983. This focuses on the problem that even if the cooling water temperature is controlled at a constant level, the engine's heat output changes depending on the operating conditions, resulting in one engine becoming overcooled during low load conditions when the heat output is low. , a cooling regulating device such as a flow 1tj control valve that regulates the cold IJ capacity of the cooling system, and a center that outputs a J8 signal correlated to the cylinder wall temperature. A driving control circuit is provided, and the control circuit controls the cooling regulating device described in 1-1 based on a table set in advance according to the operating state, or directly detects the cylinder wall temperature so that the temperature reaches a predetermined value. However, even in this defense, it is assumed that the cooling water temperature or cylinder wall temperature changes by a predetermined 1ffig:v after the cooling regulating device is activated. There is a response delay, and if you want to reduce this, it is especially important to
JThe above-mentioned problem of hunting becoming significant occurs when the water temperature is low.
（発 明 の 目 的）
本発明は、クジュータとつＡ−ラージ１フケツ１−との
間の冷却水の循環量を調整することにより冷却水温を制
御するようにした冷Ｎ１装置にお（プる上記のような問
題に対処するもので、冷却水の循環ｍを調整層る開閉弁
等の調整装置の動作速度ないし動作量をエンジンに流入
づる流入冷却水温に応じで変化さけることにより、制御
の応答性を阻害することなく、流入冷却水温が低い場合
のハンチングを効果的に抑制層ることを［二１的と゛り
る。(Object of the Invention) The present invention is directed to a cold N1 device that controls the cooling water temperature by adjusting the amount of cooling water circulated between the cooler and the A-large 1 holder 1-. This method deals with the above-mentioned problems, and controls the circulation of cooling water by changing the operating speed or amount of operation of regulating devices such as on-off valves that regulate the circulation of cooling water, depending on the temperature of the inflowing cooling water flowing into the engine. The objective is to provide a layer that effectively suppresses hunting when the inflow cooling water temperature is low without impairing the responsiveness of the cooling water.
（発 明 の 構 成）
本発明に係る冷１１装首は、」記目的のため次のように
構成される。(Structure of the Invention) The cold-11 neck harness according to the present invention is configured as follows for the purpose of this invention.
即ち、ラジェータど、１ンジンのシリンダ周囲に設けら
れたウォータージャウラ１〜と、該クジュータとジＶケ
ッ１−どの間で冷ｆＡ＋水を循環さぼる冷却水通路とを
設（プた水冷式］−ンジンにおいて、冷却水温に関連ジ
る信弓を出力りる冷月１水温検知手段と、上記ラジェー
タとつＡ−ターンせケラｌ〜との間の冷却水の循環量を
調整層る開閉弁等の調整装置と、」二記冷却水温検知手
段の出力に応じて調整装置を作動さ仕て冷却水の循環量
を制ａｌｌ ？ｌる冷却水温制御手段とを備え、これら
により冷却水温を所定値以下に制ａｌｌりるように構成
する。そして、これらの構成に加えＵ、エンジンに流入
する流入冷却水の温度を検知する流入冷却水温セン］ノ
と、該センタの出力を受（）で流入冷ム（ｊ水温が低い
ｌｌ＋’＋に上記冷却水温制御手段による調整装置に苅
りる制御利得を小さくするｉ制御利ｊｑｉＩＩＩＪ御手
段とを備える。That is, a water cooler 1 is installed around a cylinder of an engine such as a radiator, and a cooling water passage is provided to circulate cold fA+ water between the engine and the cylinder. - In the engine, there is a water temperature detection means that outputs a signal related to the cooling water temperature, and an on-off valve that adjusts the amount of cooling water circulating between the radiator and the A-turn horn. and a cooling water temperature control means that operates the adjustment device according to the output of the cooling water temperature detecting means to control the circulation amount of cooling water, and these control the cooling water temperature to a predetermined value. In addition to these configurations, there is also an inflow cooling water temperature sensor that detects the temperature of the inflow cooling water flowing into the engine, and an inflow cooling water temperature sensor that receives the output of the center. An inflow cooling comb (i control gain jjqiIIIJ control means for reducing the control gain applied to the adjustment device by the cooling water temperature control means) is provided in the inflow cooling comb (j) where the water temperature is low.
このような構成によれば、流入冷却水温が１１（い時に
冷１１〕水の循環量を調整する調整装置の動作速度或い
は動作量が小さくなることにより、通常時における応答
遅れを生じることなく、流入冷７Ｊ１水温が低いことに
よるハンチングが抑制されることになる。According to such a configuration, the operation speed or operation amount of the adjustment device that adjusts the circulating amount of water when the inflow cooling water temperature is 11 (when the temperature is 11) is reduced, so that there is no response delay during normal times. Hunting due to the low inflow cold 7J1 water temperature is suppressed.
尚、上記調整装置は電気的に開度を」ント１」−ルされ
るものの他、従来用いられている１ノ−−モスタット式
の開閉弁を用いることもできる。この場合、流入冷却水
温に応じて例えば通路面積を増減さぼることにより冷却
水の循環ｎｉ制Ｕ＋＋の制御利得が変化される。The above-mentioned adjusting device may be one in which the opening degree is controlled electrically, or a conventionally used no-mostat type on-off valve may be used. In this case, the control gain of the cooling water circulation control U++ is changed by, for example, increasing or decreasing the passage area in accordance with the inflow cooling water temperature.
（実 施 例） 以下、本発明の実施例を図面に基づい（説明りる。(Example) Hereinafter, embodiments of the present invention will be explained based on the drawings.
第１図に承りように、エンジン１にはシリンダ２・・・
２の周囲につＡ−ラージ１フケツ１〜３が設【プられて
いると共に、該ジせケラト３の出口３ａがエンジン１の
近傍に備えられたウジ１−タ４０八口４ａに、該ジャケ
ラ１〜３の人口３ｂがラジェータ４の出口４１）に夫々
パ、イブ５，６を介しＣ接続され、該ジャケット３とラ
ジ」−−９４との間に冷却水の循環通路７が形成されて
いる。また、つＡ−タージャクツ１へ３における人口３
ｂの近傍には当該エンジン１のクランク軸８にＪ：っで
ベル１−９を介して駆動される冷７ｉ１１水ポンプ１０
が設けられているとノ（に、ジ１１ケツ］へ３の１１目
−１３８には該出口３ａからバイブ５ないしラジェータ
４側への冷却水の流出量（循１１ ｉｎ、 ）を増減さ
ける調整装置として開閉弁１１が備えられＣいる。ここ
で、つ７１−ラージＡ１クツ１〜３の出Ｄ ３ ａど入
目３１）との間には、開閉弁１１の閉鎖時に冷却水をラ
ジェータ４に供給りることなく循環さけるバイパス通路
１２が設けられている。As shown in Fig. 1, engine 1 has cylinder 2...
A-Large 1 hooks 1 to 3 are provided around the 2, and the outlet 3a of the A-large 1 hook 3 is connected to the 8-port 4a of the Uji 1-ta 40 provided near the engine 1. The jackets 3b of jackets 1 to 3 are connected to the outlet 41) of the radiator 4 via pipes 5 and 6, respectively, and a cooling water circulation passage 7 is formed between the jacket 3 and the jacket 3. ing. Also, population 3 in A-Tarjakutu 1 to 3
In the vicinity of b, there is a cold 7i11 water pump 10 that is driven by the crankshaft 8 of the engine 1 via a bell 1-9.
11-138 of 3 is provided with an adjustment to increase or decrease the amount of cooling water flowing from the outlet 3a to the vibrator 5 or radiator 4 side (circulation 11 inches). An on-off valve 11 is provided as a device.Here, between the large A1 shoes 1 to 3 and the outlet D3a (inlet 31), cooling water is supplied to the radiator 4 when the on-off valve 11 is closed. A bypass passage 12 is provided for circulating the water without supplying it to the water.
また、つＡ−タ〜ジ１１グツ１−３にお（）る上記間閉
弁１１の直上流位置にはエンジン出口部における冷却水
温を検出づる水温センサ１３が備えられ、該センサ１３
から出力される水温信号△が制御回路１４に入力される
ようになっている。この制御回路１４は、上記水温信号
△が人力され、その電圧レベルと設定電圧発生回路１５
から出力される目標冷却水温に対応づる電圧レベルどを
比較して、前者の電圧レベルが後者より高い時に１″の
信号Ｂを出ノＪ′？ｌる比較回路１６と、この比較回路
１６″′の出ツノ信号Ｂを積分づる積分回路１７ど、該
積分回路１７の出力信号Ｃを増幅りる増幅回路１８とを
有し、この増幅回路１８の出力信号が制御信号りとして
上記「１１開弁１１に送給される。、そして、開閉弁１
１は制御信号１〕の値に応じでリフ１〜し、ウォーター
ジャケット３からバイブ５ないしラジェータ４に通じる
通路の開度を増減させるようになっている。Further, a water temperature sensor 13 for detecting the cooling water temperature at the engine outlet is provided at a position immediately upstream of the above-mentioned closing valve 11 in the A-stage 11 (1-3).
A water temperature signal Δ outputted from the control circuit 14 is inputted to the control circuit 14. This control circuit 14 receives the water temperature signal △ manually and uses its voltage level and set voltage generation circuit 15.
A comparator circuit 16 that compares the voltage levels corresponding to the target cooling water temperature outputted from the circuit and outputs a signal B of 1" when the former voltage level is higher than the latter, and this comparator circuit 16" It has an integrating circuit 17 that integrates the output horn signal B of ', and an amplifier circuit 18 that amplifies the output signal C of the integrating circuit 17, and the output signal of this amplifier circuit 18 is used as a control signal to is supplied to the valve 11, and the on-off valve 1
1 is a control signal 1], which increases or decreases the degree of opening of the passage leading from the water jacket 3 to the vibrator 5 or the radiator 4.
然してこの実施例においでは、」−記の構成に加えて、
ウォータージャケット３の入口３ｂに通じる通路１９に
ラジェータ４から該ジＡ・フット３に流入する流入冷却
水の温度を検知Ｊる流入冷Ｗ水渇ｔ＝ンサ２０が備えら
れ−Ｃいると共に、該センサ２０の出力信＋４ ［Ｅが
入力されζ′流流入冷却水含所定の関数関係に従って関
数値に変換する関数回路２１と、該関数回路２１の出力
信号Ｆに応じ゛（積分定数を設定Ｊる積分定数設定回路
２２とが備えられ、これらにより第２図に示１ように流
入冷ＮＪ水濡が低いほど小さくなる積分定数が設定され
るようになりＣいる。モし−Ｃ１この積分定数が上記制
御回路１４における積分回路１７に信号Ｇとし−（入力
され、該積分回路１７において比較回路１６の出力信号
Ｂを積分処ｇ４る際の積分定数としで用いられるように
なっている。However, in this embodiment, in addition to the configuration described above,
A passage 19 leading to the inlet 3b of the water jacket 3 is provided with an inflow cold water sensor 20 for detecting the temperature of the inflow cooling water flowing into the foot 3 from the radiator 4. The output signal of the sensor 20 +4 [E is input and the ζ' flow inflow cooling water content is input to a function circuit 21 which converts it into a function value according to a predetermined functional relationship, and according to the output signal F of the function circuit 21 (the integral constant is set J As shown in FIG. 2, an integral constant setting circuit 22 is provided, and as shown in FIG. is input as a signal G to an integrating circuit 17 in the control circuit 14, and is used as an integration constant when integrating the output signal B of the comparator circuit 16 in the integrating circuit 17.
尚、１記積分回路１７と積分定数設定回路２２とは、例
えば第３図に承りように抵抗２３ど＝］ンデン（、＋
２ ／Ｉとで構成されると共に、このコンデン′ｖ２４
が関数回路２１の出力信号「に応じで容昂が変化Ｊる可
変容量」ンデンリとされ、これにより積分定数が１−記
のように変化りるようになっている。Note that the integration circuit 17 and the integration constant setting circuit 22 are, for example, resistors 23, etc., as shown in FIG.
2/I, and this condenser'v24
is a variable capacitor whose expansion changes depending on the output signal of the function circuit 21, so that the integral constant changes as shown in (1).
次に」記実施例の作用を説明する。Next, the operation of the above embodiment will be explained.
今、１ンジン１を始動さけたものとりるど、クランク軸
８によってベル１−９を介して冷７．（＋水ポンプ１０
が駆動されることにより、つＡ−タージｌ／ケッ１〜３
内の冷ムｆ１水が入口３ｂ側から各シリンダ２・・・２
の周囲を通り−Ｃ出口３ ａ側に流さ４′するが、９ｆ
３動直後におい（は冷１ｉＩｌ水渦は低いのＣ１に記ジ
トケツ［〜３の出［１３ａの近傍に備えられた水温セン
サ１３から水濡信号△が人ツノされる制御回路１４にお
い（は比較回ｒ８１６の出力が” ｏ ”であり、従っ
て該制御回路１４から開開弁１１に送給される制御信＠
Ｄｂ”０”で、該開開弁１１はｌ記出口３ａを閉じＩこ
状態にある。従っ（、この時点では冷却水はラジェータ
４に供給されることな（、バイパス通路１２を通って循
環づることにイ【る。Now, when engine 1 is started, crankshaft 8 passes through bells 1-9 to cold engine 7. (+water pump 10
By being driven, the
The cold water in the cylinder f1 flows from the inlet 3b side to each cylinder 2...2
It passes around the -C exit 3 and flows to the a side 4', but 9f
Immediately after the third movement, the cold water vortex is low. The output of the rotation r816 is "o", so the control signal sent from the control circuit 14 to the opening/opening valve 11 @
When Db is "0", the on-off valve 11 closes the outlet 3a and is in the state. Therefore, at this point, the cooling water is not supplied to the radiator 4 and is instead circulated through the bypass passage 12.
そして、この状態でエンジン始動時からの時間が経過す
るに従って、第４図（１）に実線ａで小Ｊように冷却水
温が上昇し、該水温が設定値１”ｏ（例えば８５℃）に
達した時点で水温センサ−゛１３がらの水温信号Ａの電
圧レベルが制御回路１／Ｉにおける設定電圧発生回路１
５の出ノ、７電圧レベル以上となる。そのため、比較回
路１６の出力信号Ｂが第４図（２）に符号すで示づよう
に゛１パに転じ、これに伴って積分回路１７の出力信号
Ｃが同図（３）に符号Ｃで示でように成る一定の勾配で
立ち上る。そして、この積分回路１７の出力信号Ｃが増
幅回路１８を介して制ａｌｌ信月１）どして上記開閉弁
１１に送給され、該開閉弁１１の開度が制御信号Ｄ（積
分回路１７の出力１６号０）の出カ伯の上背に従って増
大する。これにより、つＡ−タージャケラ］へ３内の冷
却水は開閉弁１１の開度に対応してラジＴ−夕４に供給
され、該ラジェータ４を通過する冷却水の循環量が次第
に増加する。In this state, as time elapses from the time the engine is started, the cooling water temperature increases as indicated by the solid line a in Figure 4 (1), and the water temperature reaches the set value of 1"o (for example, 85°C). At the point when the voltage level of the water temperature signal A from the water temperature sensor 13 reaches the set voltage generation circuit 1 in the control circuit 1/I
The result of 5 is 7 voltage level or higher. Therefore, the output signal B of the comparator circuit 16 changes to 1p as already shown in FIG. 4 (2), and accordingly the output signal C of the integrating circuit 17 changes to C It rises at a constant slope as shown in . Then, the output signal C of the integrating circuit 17 is sent to the on-off valve 11 via the amplifier circuit 18 as a control signal D (integrating circuit 17). The output of No. 16 0) increases according to the upper back of the output. As a result, the cooling water in the radiator 3 is supplied to the radiator 4 in accordance with the opening degree of the on-off valve 11, and the amount of circulating cooling water passing through the radiator 4 gradually increases.
このようにしてラジェータ４を通過する冷却水の循環ｍ
が増大Ｊると、冷却水温の上昇が停止し、次に該水温が
低下し始める。そして、上記設定値Ｔ、 ｏまで低下し
た時点で制御回路１４における比較回路１６の出力信号
Ｂが第４図（２）に符号ｂ′で示１ように０″に転じる
と共に、この時点から積分回路１７の出力信号Ｃないし
制御信号りの値が同図（３）に符号Ｃ′で示すように減
少１ノ始め、これに伴って上記開１１１弁１１の開度、
即１５シジＩ −タ４を通過する冷却水の循環量が減少
づる。その／ｊめ、冷１ｊｌ水渇は一定温度まで低下し
た接、１りび上昇し、その結果、第４図（１）に実線ａ
で示ずようにウォータージせケラト出口３ａにおりる冷
却水温が設定値１− ｏを中心に上下に変動し、ハンチ
ングが生じることになる。Circulation of cooling water passing through the radiator 4 in this way m
When J increases, the cooling water temperature stops increasing, and then the water temperature begins to decrease. Then, when the output signal B of the comparison circuit 16 in the control circuit 14 decreases to the set value T, o, it changes to 0'' as shown by the symbol b' in FIG. 4(2), and from this point on, the integral The value of the output signal C or the control signal of the circuit 17 begins to decrease by 1 as shown by the symbol C' in FIG.
In other words, the amount of circulating cooling water passing through the 15th cylinder I-ta 4 decreases. As a result, the solid line a in Figure 4 (1)
As shown in the figure, the temperature of the cooling water flowing into the water heater outlet 3a fluctuates up and down around the set value 1-o, causing hunting.
ところで、上記のような冷却水温の制御において、外気
温が低い等のためラジ土−夕４からウォータージャケッ
ト３に流入する流入冷却水の温度が低い時は、１Ｆｉｌ
ｆｆＪ弁１１の一定の開弁速度に対してエンジン１が
より速かに冷却されてウォータージャケット出口３ａに
おける冷却水−の低下が急激となる。その１．：め、第
４図（１）に鎖線ａ′で示すように冷却水温は設定値Ｔ
（１以下に大きくアンダーシュー１〜し、Ｃれに伴っ
Ｃハンチングが著しくなる。しかし、流入冷却水温が低
くなると、これを示す流入冷却水温センサ２０の出力信
Ｑ ＩＥが関数回路２１を介して入力される積分定数設
定回路２２は第２図に示りＪ：うに小さな値の積分定数
を設定し、この積分定数に塁づいて制御回路１４の積分
回路１７が比較回路１Ｇの出力信号Ｂを積分することに
なる。そのため、該積分回路１７から出力される信号０
は第４図（３）に点線ｃ ＩＴ （ｘ承りように勾配が
緩かになる。このことは、制御回路１４による開閉弁１
１に対する制御の制御利ｊｑが小さくなり、冷却水温が
設定値Ｔｏを超えた場合にお番」る開閉弁１１の開弁速
度ないしラジＪ、−夕４を通過する冷却水循環量の増加
速度が緩かになることを意味覆る。その結果、流入冷却
水温が低いにも拘らず、ウォータージャクツ１〜出口３
８にお【プる冷却水温の低下が緩かになり、第４図（１
）に実ｗＡａで示すようにアンダーツ１−ト或いはハン
チングが軽減されることになる。By the way, in controlling the cooling water temperature as described above, when the temperature of the inflow cooling water flowing into the water jacket 3 from Saturday and Sunday 4 is low due to low outside temperature, etc., 1Fil.
The engine 1 is cooled more quickly with respect to a constant opening speed of the ffJ valve 11, and the cooling water at the water jacket outlet 3a rapidly decreases. Part 1. :Me, as shown by the chain line a' in Figure 4 (1), the cooling water temperature is at the set value T.
(There is a large undershoe below 1, and C hunting becomes significant as C falls. However, when the inflow cooling water temperature becomes low, the output signal QIE of the inflow cooling water temperature sensor 20 indicating this decreases via the function circuit 21. The input integral constant setting circuit 22 is shown in FIG. Therefore, the signal 0 output from the integrating circuit 17
As shown in FIG. 4 (3), the gradient becomes gentler as shown by the dotted line c IT (x). This means that the on-off valve 1 by the control circuit 14
The control profit jq of the control relative to 1 becomes smaller, and the opening speed of the on-off valve 11, which is turned on when the cooling water temperature exceeds the set value To, or the increasing speed of the circulating amount of cooling water passing through 4 is Cover means to become loose. As a result, despite the low inflow cooling water temperature, water jacks 1 to 3
8, the cooling water temperature decreases more slowly, and as shown in Figure 4 (1).
), undercutting or hunting is reduced as shown by the actual wAa.
尚、制御利得或いは積分定数を当初から小さな値に設定
しでおくと、流入冷却水温が低い場合におＧ−Ｊる上記
のようなハンチングは防止されるが、王の反面、流入冷
却水濡が狛に低くない通常の場合に応答遅れの問題が顕
著となり、そのため、例えばエンジン発熱量が大きい場
合に冷に１水温が設定値まで低下するのに長時間を要η
ることになって、エンジンがＡ−バーヒー１〜づる等の
弊害が生じる。これに対して、本案は流入冷Ｊ、１１水
温が低い場合のみ制御利得を小さく４る構成Ｃあるから
、通常時にお（プる応答遅れの問題をＩＪじることなく
、流入冷却水温が低いことによるハンチングの問題が解
消されることになる。Note that if the control gain or integral constant is set to a small value from the beginning, hunting like the one described above can be prevented when the inflow cooling water temperature is low. The problem of response delay becomes noticeable in normal situations where the water temperature is not extremely low. Therefore, for example, when the engine generates a large amount of heat, it takes a long time for the water temperature to drop to the set value.
As a result, problems such as the engine becoming overheated occur. On the other hand, this proposal has a configuration C that reduces the control gain only when the inflow cooling water temperature is low. The problem of hunting caused by this problem will be solved.
ここで、上記の実施例では、センサ２０によって検知さ
れる流入冷却水温のみに基づいて制御利得を変化させる
構成としたが、該流入冷却水温センサ２０の出力信号Ｅ
と、つＡ−ターン（・′ｌジット口３ａにお【〕る水温
センサ１３の出力信号Ａとに基づい−（、ジＶケット入
［’：Ｉ ３１１と出［−ビ）ａの水温の差に応じて制
御利得を変化ざぜるようにしても同様の作用が得られる
。Here, in the above embodiment, the control gain is changed based only on the inflow cooling water temperature detected by the sensor 20, but the output signal E of the inflow cooling water temperature sensor 20 is
Based on the output signal A of the water temperature sensor 13 located at the jet port 3a, the water temperature at A similar effect can be obtained by varying the control gain depending on the difference.
（発 明 の 効 果）
以上のように本発明によれば、ラジェータとつＡ−ター
ジＶケッ１へとの間の冷に１水の循環量を調整すること
により冷Ｎノ水温を制御づる水冷ｊ（Ｌンジンの冷却装
置において、流入冷Ｎ３水温レンサによって検知される
エンジンに流入する流入冷却水の温度が低い時に上記冷
却水循環量の調整を行う調整装置に対（る制御利得を小
さくするようにしたから、通常時にお（〕る冷却水温の
制御の応答遅れ、特にエンジン発熱量が大きい場合にお
けるオーバーヒート等を生じることなく、流入冷却水温
が低い場合にお【プる冷却水温のハンチングが抑制され
るようになる。このように１．７で、冷却水温が常に良
りｆに制御されることになる。(Effects of the Invention) As described above, according to the present invention, the temperature of the cold N water can be controlled by adjusting the amount of water circulated between the radiator and the A-Taj V box. Water cooling j (In the engine cooling system, when the temperature of the inflow cooling water flowing into the engine detected by the inflow cooling N3 water temperature sensor is low, the control gain of the adjustment device that adjusts the amount of cooling water circulation is reduced. As a result, there is no response delay in cooling water temperature control that normally occurs, and there is no overheating, especially when the engine heat output is large, and cooling water temperature hunting that occurs when the inflow cooling water temperature is low is eliminated. In this way, at 1.7, the cooling water temperature is always well controlled to f.
図面は本発明の実施例を示Ｊもので、第１図は制御シス
テム図、第２図は制御特性を示すグラフ、第３図は第１
図における積分回路と積分定数設定回路の具体例を示ず
電気回路図、第４図は作用を示づタイムヂャート図であ
る。
１・・・エンジン、３・・・つＡ−タージャケット、１
・・・ラジェータ、７・・・冷却水通路（循環通路）、
１１・・・調整装置（間開弁）、１３・・・冷却水温検
知手段（水温センサ）、１４・・・冷却水温制御手段（
制御回路）、２０・・・流入冷却水温センサ、２２・・
・制御利得制御手段（積分定数設定回路）。
出願人 東洋工業株式会社
第３図
第４図The drawings show embodiments of the present invention; Fig. 1 is a control system diagram, Fig. 2 is a graph showing control characteristics, and Fig. 3 is a graph showing control characteristics.
FIG. 4 is an electrical circuit diagram without showing specific examples of the integrating circuit and integral constant setting circuit in the figure, and FIG. 4 is a time chart diagram showing the operation. 1...engine, 3...two A-tar jackets, 1
...Radiator, 7...Cooling water passage (circulation passage),
11... Adjustment device (open valve), 13... Cooling water temperature detection means (water temperature sensor), 14... Cooling water temperature control means (
control circuit), 20... inflow cooling water temperature sensor, 22...
- Control gain control means (integral constant setting circuit). Applicant: Toyo Kogyo Co., Ltd. Figure 3 Figure 4
Claims (1)
ツ１−と、該ラジェータとジャケットとの間で冷却水を
循環させる冷却水通路と、冷却水温に関連する信号を出
力する冷却水温検知手段と、上記ラジェータとジャケッ
トとの間の冷却水の循環量を調整する調整装置と、ト記
冷却水温検知手段の出ツノに応じて調整装置を作動さＶ
て冷却水温が所定値以下になるように冷却水の循環量を
制御１−！ｌる冷却水温制御手段と、エンジンに流入す
る流入冷却水の温度を検知づる流入冷却水部センザと、
該レンザの出力を受ｔノで流入冷却水温が低い時に上記
冷却水温制御手段による冷却水循環量制御の制御利得を
小さくする制御利得制御手段とからなる水冷式エンジン
の冷却装置。(1) Ujuta and engine A-Large 1! a cooling water passage for circulating cooling water between the radiator and the jacket, a cooling water temperature detection means for outputting a signal related to the cooling water temperature, and a cooling water circulation between the radiator and the jacket. An adjustment device that adjusts the amount, and an adjustment device that operates according to the output of the cooling water temperature detection means.
Control the circulation amount of cooling water so that the cooling water temperature is below a predetermined value 1-! an inflow cooling water section sensor that detects the temperature of inflow cooling water flowing into the engine;
A cooling device for a water-cooled engine, comprising control gain control means that receives the output of the laser and reduces a control gain of cooling water circulation amount control by the cooling water temperature control means when the inflow cooling water temperature is low.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2678284A JPS60169623A (en) | 1984-02-14 | 1984-02-14 | Cooling device for water-cooled engine |
| US06/698,531 US4616599A (en) | 1984-02-09 | 1985-02-05 | Cooling arrangement for water-cooled internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2678284A JPS60169623A (en) | 1984-02-14 | 1984-02-14 | Cooling device for water-cooled engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60169623A true JPS60169623A (en) | 1985-09-03 |
| JPH0581728B2 JPH0581728B2 (en) | 1993-11-16 |
Family
ID=12202878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2678284A Granted JPS60169623A (en) | 1984-02-09 | 1984-02-14 | Cooling device for water-cooled engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60169623A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63268912A (en) * | 1987-04-27 | 1988-11-07 | Mitsubishi Heavy Ind Ltd | Cooling device of internal combustion engine |
| JPH0443812A (en) * | 1990-06-08 | 1992-02-13 | Kubota Corp | Cooling device for water-cooled engine |
| JPH0596433U (en) * | 1991-02-25 | 1993-12-27 | 稲田 健 | Water-cooled engine cooling system |
| WO2021038776A1 (en) * | 2019-08-29 | 2021-03-04 | 株式会社ミクニ | Engine cooling device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0415366A (en) * | 1990-05-09 | 1992-01-20 | Kubota Corp | Vehicle speed controller for working vehicle |
-
1984
- 1984-02-14 JP JP2678284A patent/JPS60169623A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0415366A (en) * | 1990-05-09 | 1992-01-20 | Kubota Corp | Vehicle speed controller for working vehicle |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63268912A (en) * | 1987-04-27 | 1988-11-07 | Mitsubishi Heavy Ind Ltd | Cooling device of internal combustion engine |
| JPH0443812A (en) * | 1990-06-08 | 1992-02-13 | Kubota Corp | Cooling device for water-cooled engine |
| JPH0596433U (en) * | 1991-02-25 | 1993-12-27 | 稲田 健 | Water-cooled engine cooling system |
| WO2021038776A1 (en) * | 2019-08-29 | 2021-03-04 | 株式会社ミクニ | Engine cooling device |
| JPWO2021038776A1 (en) * | 2019-08-29 | 2021-03-04 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0581728B2 (en) | 1993-11-16 |
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