JP2007522388A - Method and apparatus for controlling a cooling circuit of an internal combustion engine - Google Patents

Method and apparatus for controlling a cooling circuit of an internal combustion engine Download PDF

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JP2007522388A
JP2007522388A JP2006553421A JP2006553421A JP2007522388A JP 2007522388 A JP2007522388 A JP 2007522388A JP 2006553421 A JP2006553421 A JP 2006553421A JP 2006553421 A JP2006553421 A JP 2006553421A JP 2007522388 A JP2007522388 A JP 2007522388A
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target temperature
temperature
internal combustion
cooling circuit
warm
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JP4658971B2 (en
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ゲンティール−クライエンカンプ イザベレ
グローテ イェルク
シェーネベルク ディルク
ルーカス フランツ
マイアー ライナー
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Robert Bosch GmbH
Audi AG
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Audi AG
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    • 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
    • F01P2037/00—Controlling
    • F01P2037/02—Controlling starting
    • 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
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed

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  • 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)

Abstract

本発明は、制御が所定の目標温度を用いて行われる、内燃機関の冷却回路を制御する方法及び装置に関する。本発明の方法及び装置では、暖機運転のために一時的に、目標温度（Ｔｓ）よりも高い暖機運転目標温度（Ｔｓｗ）が使用される。  The present invention relates to a method and apparatus for controlling a cooling circuit of an internal combustion engine, wherein the control is performed using a predetermined target temperature. In the method and apparatus of the present invention, a warm-up operation target temperature (Tsw) higher than the target temperature (Ts) is temporarily used for the warm-up operation.

Description

本発明は、請求項１もしくは請求項７に記載された形式の、内燃機関の冷却回路を制御する方法及び装置に関する。   The invention relates to a method and a device for controlling a cooling circuit of an internal combustion engine of the type described in claim 1 or claim 7.

公知の構成では、内燃機関の冷却回路は通常、所定の目標温度に対して調整される。   In known arrangements, the cooling circuit of an internal combustion engine is usually adjusted for a predetermined target temperature.

発明の利点
本発明による方法では、冷却回路が所定の目標温度を有している、内燃機関の冷却回路を制御する方法において、内燃機関の暖機運転のために、一時的に、目標温度よりも高い暖機運転目標温度を設定するようにした。 Advantages of the Invention In the method according to the invention, in a method for controlling a cooling circuit of an internal combustion engine, wherein the cooling circuit has a predetermined target temperature, for warming up the internal combustion engine, temporarily over the target temperature A higher warm-up operation target temperature was set.

また本発明による装置では、内燃機関の冷却回路を所定の目標温度で制御する、内燃機関の冷却回路を制御する装置において、暖機運転のために一時的に、目標温度よりも高い暖機運転目標温度が使用されるようにした。   Further, in the apparatus according to the present invention, in the apparatus for controlling the cooling circuit of the internal combustion engine that controls the cooling circuit of the internal combustion engine at a predetermined target temperature, the warm-up operation that is temporarily higher than the target temperature is temporarily performed for the warm-up operation. The target temperature was used.

本発明による方法もしくは装置には、公知のものに対して次のような利点、すなわち内燃機関の改善された暖機運転が達成されるという利点がある。特に、暖機運転中における内燃機関の迅速な暖機が保証される。   The method or device according to the invention has the following advantages over the known ones, namely that an improved warm-up of the internal combustion engine is achieved. In particular, rapid warm-up of the internal combustion engine during warm-up operation is guaranteed.

本発明による方法の別の有利な方法は、請求項２〜６に記載されている。   Another advantageous method of the method according to the invention is described in claims 2-6.

本発明の有利な方法では、暖機運転目標温度が、冷却回路における冷媒の沸点と目標温度との間において選択される。暖機運転を認識するためには、内燃機関の始動直後における内燃機関温度を利用することができる。暖機運転目標温度が得られた場合に、相応な制御弁もしくはポンプを制御することによって、冷却回路が活性化される。この場合容積流は、弁の開放及び／又はポンプのポンプ出力に影響を与えることによって、所定の関係でゆっくりと高められることが望ましい。また暖機運転目標温度が得られた場合に、移行目標温度を設定することも可能である。このような処置は、暖機目標温度の得られた後で目標温度に向かっての過剰ではない緩やかな移行を保証するために役立つ。   In the advantageous method of the invention, the warm-up target temperature is selected between the boiling point of the refrigerant in the cooling circuit and the target temperature. In order to recognize the warm-up operation, the internal combustion engine temperature immediately after starting the internal combustion engine can be used. When the warm-up target temperature is obtained, the cooling circuit is activated by controlling the corresponding control valve or pump. In this case, the volume flow is preferably slowly increased in a predetermined relationship by affecting the opening of the valve and / or the pump output of the pump. It is also possible to set the transition target temperature when the warm-up operation target temperature is obtained. Such a procedure helps to ensure a non-excessive gradual transition towards the target temperature after the warm-up target temperature is obtained.

図面
次に図面を参照しながら本発明の実施例を説明する。 Drawings Next, embodiments of the present invention will be described with reference to the drawings.

図１は、内燃機関の冷却回路を示す概略図であり、
図２は、暖機運転時における汎用の温度調整の温度経過を示す線図であり、
図３は、本発明による暖機運転時における温度経過を示す線図であり、
図４は、本発明による方法の個々の方法ステップを示すフローチャートである。 FIG. 1 is a schematic diagram showing a cooling circuit of an internal combustion engine,
FIG. 2 is a diagram showing a temperature course of general-purpose temperature adjustment during warm-up operation,
FIG. 3 is a diagram showing a temperature course during warm-up operation according to the present invention,
FIG. 4 is a flow chart showing the individual method steps of the method according to the invention.

実施例の記載
図１には内燃機関の冷却回路が略示されている。内燃機関は、内部にシリンダ２が配置されているエンジンブロック１を有している。このエンジンブロック１は冷媒によって貫流され、この冷媒は供給路３から供給されて、排出路４から排出される。エンジンブロック１内における冷媒は排出路４を通って、直接再びバイパス１０を介してか又は略示された冷却器５を介して、供給路３を通って再びエンジンブロック１に供給される。どの分岐を通って冷媒が流れるかは、冷媒温度に関連してサーモスタット１１（又は択一的に電子式の混合弁）によって決定される。極めて高温の冷媒では、シリンダ２内において内燃機関の燃焼時に生じる熱は、冷媒によって冷却器５に運ばれ、そこで周囲空気又はこれに類したものに放出される。このようにして冷やされた冷却液は次いで供給路３を通して再びエンジンブロック１に運ばれる。排出路４には絞り弁６が設けられ、供給路３にはポンプ７が設けられている。弁６によって、エンジンブロック１と冷却器５との間における接続を開放、絞り又は中断することができる。ポンプ７によって冷媒は移動させられて、冷却回路内を運ばれることができる。弁６及びポンプ７は制御装置８によって配線（図示せず）を介して制御される。制御装置８は付加的にさらに、エンジン温度に関する情報を、例えばエンジンブロック１に配置されたエンジン温度センサ９から得る。このエンジン温度センサ９は他の適宜な箇所、例えば排出路４に設けられていてもよい。 DESCRIPTION OF THE EMBODIMENTS FIG. 1 schematically shows a cooling circuit for an internal combustion engine. The internal combustion engine has an engine block 1 in which a cylinder 2 is arranged. The engine block 1 flows through by the refrigerant, and the refrigerant is supplied from the supply path 3 and discharged from the discharge path 4. The refrigerant in the engine block 1 is supplied again to the engine block 1 through the discharge path 4, directly again via the bypass 10, or via the cooler 5 schematically shown, via the supply path 3. The branch through which the refrigerant flows is determined by the thermostat 11 (or alternatively an electronic mixing valve) in relation to the refrigerant temperature. With a very hot refrigerant, the heat generated during combustion of the internal combustion engine in the cylinder 2 is carried by the refrigerant to the cooler 5 where it is released to ambient air or the like. The coolant thus cooled is then conveyed again to the engine block 1 through the supply path 3. A throttle valve 6 is provided in the discharge path 4, and a pump 7 is provided in the supply path 3. The connection between the engine block 1 and the cooler 5 can be opened, throttled or interrupted by the valve 6. The refrigerant can be moved by the pump 7 and carried in the cooling circuit. The valve 6 and the pump 7 are controlled by the control device 8 via wiring (not shown). The control device 8 additionally obtains information on the engine temperature, for example, from an engine temperature sensor 9 arranged in the engine block 1. The engine temperature sensor 9 may be provided in another appropriate location, for example, the discharge path 4.

図２には、冷却回路を制御する汎用の方法における温度経過が示されている。この線図において縦軸には温度Ｔが、横軸には時間ｔがとられている。時点ｔ０において内燃機関が始動させられる。これによって比較的早く、エンジンブロック１における温度は、目標温度Ｔｓが得られる時点ｔ１まで上昇する。この時点において制御装置８は弁６を開放し、ポンプ７を活性化させる。この目標温度Ｔｓは、内燃機関の持続的な温度において望まれる温度である。常にこの温度が得られる場合には、サーモスタットは開放され、つまり高温の冷媒がエンジンブロック１から取り出され、冷却器５を通して吸い込まれて冷却され、そして再び低い温度でエンジンブロック１に供給される。このようにしてエンジンブロック１の確実な冷却が達成される。時点ｔ１において内燃機関が始動後に一回前記目標温度Ｔｓに達すると、弁６は開放され、ポンプ７は活性化される。冷却器５及び管路３，４，１０内にはなお極めて冷たい冷媒が存在しているので、この冷却回路の１回の活性化は、エンジン温度の強い温度低下と結び付いている。従って時点ｔ１と時点ｔ２との間において明らかな温度降下が生じ、つまり内燃機関は再び最適な目標温度Ｔｓを下回った温度で運転されることになる。そしてｔ２とｔ３との間の比較的長い時間の経過後に初めて、エンジンブロック１における温度は再び目標温度Ｔｓに達する。この際に再び冷却回路は活性化されるが、これによってはもはやさほど強く温度は低下しない。それというのは、この場合冷却器５及び管路３，４における冷媒は既にある程度の温度に達しているからである。   FIG. 2 shows the temperature course in a general method for controlling the cooling circuit. In this diagram, the vertical axis represents temperature T and the horizontal axis represents time t. The internal combustion engine is started at time t0. As a result, the temperature in the engine block 1 rises relatively quickly until the time point t1 at which the target temperature Ts is obtained. At this point, the control device 8 opens the valve 6 and activates the pump 7. This target temperature Ts is a desired temperature in the continuous temperature of the internal combustion engine. If this temperature is always obtained, the thermostat is opened, i.e. hot refrigerant is removed from the engine block 1, sucked through the cooler 5 and cooled, and again supplied to the engine block 1 at a lower temperature. In this way, reliable cooling of the engine block 1 is achieved. When the internal combustion engine reaches the target temperature Ts once after the start at time t1, the valve 6 is opened and the pump 7 is activated. Since there is still very cold refrigerant in the cooler 5 and the lines 3, 4 and 10, a single activation of this cooling circuit is associated with a strong engine temperature drop. Therefore, a clear temperature drop occurs between the time point t1 and the time point t2, that is, the internal combustion engine is operated again at a temperature below the optimum target temperature Ts. Only after a relatively long time elapses between t2 and t3, the temperature in the engine block 1 reaches the target temperature Ts again. In this case, the cooling circuit is activated again, but this does not reduce the temperature any more. This is because the refrigerant in the cooler 5 and the pipes 3 and 4 has already reached a certain temperature in this case.

図３には、本発明によって改善された、冷却回路を制御する方法が示されている。時点ｔ０において内燃機関が始動され、時点ｔ１までの加熱の時間経過は、図２において既に述べた経過に相当している。本発明ではしかしながら暖機運転を目的として、冷却回路の１回目の活性化は、温度Ｔｓではなく、より高い暖機目標温度Ｔｓｗにおいて行われる。これによって暖機運転時に、エンジンブロック１における温度のある程度の超過が受け入れられる。時点ｔ４において初めて、つまり図２におけるよりも遅くに、より高い温度Ｔｓｗで、冷却回路の１回目の活性化が行われ、この場合弁６はゆっくりと開放されて、ポンプ７が投入接続される。従ってこの処置だけによって、つまりより高い暖機目標温度Ｔｓｗを可能にすることによって、改善された暖機運転が達成される。たとえ時点ｔ４の後における温度経過が、図２において時点ｔ１〜ｔ３の間における温度経過に相当する温度経過に相当しているとしても、全体的には、所望の目標温度Ｔｓへのエンジン温度のより良好な適合が達成される。付加的な処置としてしかしながらまたさらに、弁の開放及び／又はポンプ出力の制御は次のことを、すなわち冷却器５及び管路３，４内に暖機運転に基づいて極めて低い温度を有する冷却媒体が存在していることを、考慮する。このことに基づいて、冷却器５を貫流する質量流量が制限され、この場合弁６の開放及び／又はポンプのポンプ出力は温度状況に合わせられる。特に、弁は所定の時定数でゆっくりと開放されかつ／又はポンプの出力はゆっくりと高められる。このようにして図３において時点ｔ４とｔ５との間に示された温度経過が得られ、この温度経過は、図２におけるｔ１とｔ２との間の時間に比べて、著しく僅かしか低下しない。このようにして極めてゆっくりと目標温度ｔ５への接近が達成される。このような効果は、弁のゆっくりとした開放又はポンプ出力の上昇の他に、時点ｔ４の後で移行目標温度が所定され、この移行目標温度が所定の時間に関連して暖機目標温度から目標温度に向かって変化するようになっていても、得ることができる。   FIG. 3 shows a method for controlling a cooling circuit, improved according to the present invention. The internal combustion engine is started at time t0, and the heating time elapsed until time t1 corresponds to the time already described in FIG. However, in the present invention, for the purpose of warm-up operation, the first activation of the cooling circuit is performed not at the temperature Ts but at a higher warm-up target temperature Tsw. As a result, a certain degree of excess of the temperature in the engine block 1 is accepted during the warm-up operation. For the first time at time t4, ie later than in FIG. 2, the first activation of the cooling circuit takes place at a higher temperature Tsw, in which case the valve 6 is opened slowly and the pump 7 is switched on. . Therefore, an improved warm-up operation is achieved by this measure alone, ie by allowing a higher warm-up target temperature Tsw. Even if the temperature course after the time point t4 corresponds to the temperature course corresponding to the temperature course between the time points t1 to t3 in FIG. 2, the overall engine temperature to the desired target temperature Ts is generally determined. A better fit is achieved. As an additional measure, however, further, the opening of the valve and / or the control of the pump output is as follows: a cooling medium having a very low temperature based on the warm-up operation in the cooler 5 and in the lines 3, 4 Consider the existence of Based on this, the mass flow through the cooler 5 is limited, in which case the opening of the valve 6 and / or the pump output of the pump is adapted to the temperature situation. In particular, the valve is slowly opened at a predetermined time constant and / or the pump output is slowly increased. In this way, the temperature course shown between time points t4 and t5 in FIG. 3 is obtained, and this temperature course is significantly reduced compared to the time between t1 and t2 in FIG. In this way, the approach to the target temperature t5 is achieved very slowly. Such an effect is that, in addition to the slow opening of the valve or an increase in pump output, a transition target temperature is determined after time t4, and this transition target temperature is related to the warm-up target temperature in relation to a predetermined time. Even if the temperature changes toward the target temperature, it can be obtained.

図２と図３との比較から明瞭に分かるように、図３に示された本発明による方法によって、内燃機関の暖機運転時におけるエンジンブロック１における温度は、冷却系が所望の目標温度に初めて達した後で、さほど強くは低下しなくなる。従って内燃機関の暖機運転は改善され、この場合調整レベルが、つまりエンジンブロック１における目標温度への接近が時間経過にわたってより良好に達成される。この際に目標温度が短時間だけ超過されるが、これはまったく問題ない。それというのは、この段階における冷却器５内の極めて低温の冷媒に基づいて、高められた冷却出力が得られ、ひいてはエンジンによって有害な温度範囲への暖機目標温度Ｔｓｗの超過は、確実に阻止され得るからである。この高められた冷却能力に基づいて、暖機運転段階中、場合によっては有害なエンジン温度からの暖機目標温度のセーフティマージンを、著しく減じることができる。   As can be clearly seen from the comparison between FIG. 2 and FIG. 3, the temperature in the engine block 1 during the warm-up operation of the internal combustion engine can be set to a desired target temperature by the cooling system by the method according to the present invention shown in FIG. 3. After reaching for the first time, it will not decrease so strongly. The warm-up operation of the internal combustion engine is thus improved, in which case the adjustment level, i.e. the closer to the target temperature in the engine block 1, is better achieved over time. At this time, the target temperature is exceeded only for a short time, but this is not a problem at all. This is because, based on the extremely low temperature refrigerant in the cooler 5 at this stage, an increased cooling output is obtained, and thus the engine warm-up target temperature Tsw to the harmful temperature range is surely exceeded. Because it can be prevented. Based on this increased cooling capacity, during the warm-up phase, the safety margin of the warm-up target temperature from possibly harmful engine temperatures can be significantly reduced.

図４には本発明による方法が再度、方法経過を示すフローチャートで示されている。ブロック１００において冷却回路を制御する方法は内燃機関の始動で始まる。次いで応答ブロック１０１において、エンジン温度が読み込まれ、それがコールドスタートであるか否かが決定される。この決定は、エンジン温度が３０℃よりも低いか否かが応答されることによって、簡単に行うことができる。エンジン温度が３０℃以上の場合、つまりコールドスタートでない場合には、ステップ１０１にはステップ１０２が続く。ステップ１０１において、コールドスタートの存在が確認されると（ｙ）、ステップ１０１にはステップ１０３が続く。ステップ１０３において弁６は閉鎖され、ポンプ７は遮断され、調整温度、つまり弁及びポンプが活性化される温度は、暖機運転目標温度の値にセットされる。ステップ１０３にはステップ１０４が続き、このステップ１０４においては、エンジンブロック１の温度が暖機運転温度を上回ったか否かが応答される。エンジンブロック１の温度が暖機運転温度を上回っていない場合には（ｎ）、ステップ１０４の後に再びステップ１０３が続く。しかしながらステップ１０４において、エンジンブロック１の温度が暖機運転温度を上回っているという応答が得られた場合には（ｙ）、ステップ１０４にはステップ１０５が続く。このステップ１０５において冷却回路の活性化が行われ、この際に弁の開放及ぶポンプの出力は時間に関連して影響を受ける。この処置によって、直ちにすべての容積流が冷却回路を通ることが許されるのではなく、まず初めは減じられた容積流だけが通流し、その結果、汎用の系におけるように直ちに強い冷却が生じることはない。この時間関数（Zeitfunktion）は、冷却器５における冷却媒体がまだ極めて低い温度しか有していない状況を、考慮する。さらに調整温度は、暖機目標温度と目標温度との間の値を有している移行目標温度の値にセットされる。この両方の処置は場合によっては個々に用いられることも可能である。それというのは両方の処置は共に、この暖機段階における温度の極めて迅速な低下を制限するのに適しているからである。しかしながら両方の処置が同時に使用されると有利である。それというのは、両方の処置を同時に用いることによって、目標温度への接近を特に正確に調節することができるからである。   In FIG. 4, the method according to the invention is again shown in a flow chart showing the course of the method. The method for controlling the cooling circuit in block 100 begins with the start of the internal combustion engine. Next, at response block 101, the engine temperature is read to determine if it is a cold start. This determination can be easily made by responding whether the engine temperature is lower than 30 ° C. If the engine temperature is 30 ° C. or higher, that is, if it is not a cold start, step 102 is followed by step 102. If the presence of a cold start is confirmed in step 101 (y), step 103 is followed by step 103. In step 103, the valve 6 is closed, the pump 7 is shut off, and the regulated temperature, i.e. the temperature at which the valve and pump are activated, is set to the value of the warm-up target temperature. Step 103 is followed by step 104, in which it is answered whether the temperature of the engine block 1 has exceeded the warm-up operating temperature. When the temperature of the engine block 1 does not exceed the warm-up operation temperature (n), step 103 is followed by step 103 again. However, if a response is obtained in step 104 that the temperature of the engine block 1 is above the warm-up operation temperature (y), step 104 is followed by step 105. In this step 105, the cooling circuit is activated, in which the opening of the valve and the output of the pump are affected in relation to time. This procedure does not allow all volumetric flow to pass immediately through the cooling circuit, but initially only reduced volumetric flow is passed, resulting in immediate strong cooling as in general purpose systems. There is no. This time function (Zeitfunktion) takes into account the situation where the cooling medium in the cooler 5 still has a very low temperature. Furthermore, the adjustment temperature is set to the value of the transition target temperature having a value between the warm-up target temperature and the target temperature. Both treatments can be used individually in some cases. This is because both treatments are suitable for limiting the very rapid drop in temperature during this warm-up phase. However, it is advantageous if both treatments are used simultaneously. This is because the approach to the target temperature can be adjusted particularly accurately by using both treatments simultaneously.

ステップ１０５にはステップ１０６が続き、このステップ１０６においては、エンジンブロック１の温度が目標温度に達したか否かが検査される。エンジンブロック１の温度がまだ目標温度に達していない場合には（ｎ）、ステップ１０６の後に再びステップ１０５が続く。しかしながらエンジンブロック１の温度が目標温度に達している場合には（ｙ）、ステップ１０６にステップ１０２が続く。そしてステップ１０２において冷却回路の通常の運転調整が行われ、つまり調整温度として目標温度が使用され、弁６及びポンプ７は、通常運転のために設定された汎用のデータによって制御される。この通常の調整は、種々様々な運転状態に対して、弁６又はポンプ７を制御するための種々異なった目標温度もしくは種々異なった特性を用意することができる。   Step 105 is followed by step 106, in which it is checked whether the temperature of the engine block 1 has reached the target temperature. If the temperature of the engine block 1 has not yet reached the target temperature (n), step 105 is followed by step 105 again. However, if the temperature of the engine block 1 has reached the target temperature (y), step 102 is followed by step 102. In step 102, normal operation adjustment of the cooling circuit is performed, that is, the target temperature is used as the adjustment temperature, and the valve 6 and the pump 7 are controlled by general-purpose data set for normal operation. This normal adjustment can provide different target temperatures or different characteristics for controlling the valve 6 or the pump 7 for different operating conditions.

内燃機関の冷却回路を示す概略図である。It is the schematic which shows the cooling circuit of an internal combustion engine. 暖機運転時における汎用の温度調整の温度経過を示す線図である。It is a diagram which shows the temperature course of the general purpose temperature adjustment at the time of warming-up operation. 本発明による暖機運転時における温度経過を示す線図である。It is a diagram which shows temperature progress at the time of the warming-up operation by this invention. 本発明による方法の個々の方法ステップを示すフローチャートである。4 is a flow chart showing the individual method steps of the method according to the invention.

Claims (7)

冷却回路が所定の目標温度（Ｔｓ）を有している、内燃機関の冷却回路を制御する方法において、内燃機関の暖機運転のために、一時的に、目標温度（Ｔｓ）よりも高い暖機運転目標温度（Ｔｓｗ）を設定することを特徴とする、内燃機関の冷却回路を制御する方法。   In a method of controlling a cooling circuit of an internal combustion engine, wherein the cooling circuit has a predetermined target temperature (Ts), a warmer temperature that is temporarily higher than the target temperature (Ts) is temporarily used for warming up the internal combustion engine. A method for controlling a cooling circuit of an internal combustion engine, characterized in that a machine operation target temperature (Tsw) is set. 暖機運転目標温度（Ｔｓｗ）を、冷却回路（３，４，５）における冷媒の沸点と目標温度（Ｔｓ）との間に選択する、請求項１記載の方法。   The method according to claim 1, wherein the warm-up operation target temperature (Tsw) is selected between the boiling point of the refrigerant in the cooling circuit (3,4, 5) and the target temperature (Ts). 内燃機関の始動後に内燃機関の温度が所定の値を下回っていることによって、暖機運転を認識する、請求項１又は２記載の方法。   The method according to claim 1, wherein the warm-up operation is recognized when the temperature of the internal combustion engine is below a predetermined value after the internal combustion engine is started. 暖機運転目標温度（Ｔｓｗ）が得られた場合に、冷却回路（３，４，５）の絞り弁（６）及びポンプ（７）を活性化する、請求項１から３までのいずれか１項記載の方法。   The throttle valve (6) and the pump (7) of the cooling circuit (3, 4, 5) are activated when the warm-up operation target temperature (Tsw) is obtained. The method described in the paragraph. 活性化時に弁（６）の開放及び／又はポンプ（７）のポンプ出力を、所定の時間に関連して高める、請求項４記載の方法。   5. The method according to claim 4, wherein on activation, the opening of the valve (6) and / or the pump output of the pump (7) is increased in relation to a predetermined time. 暖機運転目標温度（Ｔｓｗ）が得られた場合に、冷却回路のために、所定の時間に関連して暖機目標温度（Ｔｓｗ）から目標温度（Ｔｓ）に向かって変化する移行目標温度を設定する、請求項１から５までのいずれか１項記載の方法。   When the warm-up operation target temperature (Tsw) is obtained, a transition target temperature that changes from the warm-up target temperature (Tsw) toward the target temperature (Ts) in relation to a predetermined time is set for the cooling circuit. The method according to claim 1, wherein the method is set. 内燃機関の冷却回路（３，４，５）を所定の目標温度（Ｔｓ）で制御する、内燃機関の冷却回路を制御する装置において、暖機運転のために一時的に、目標温度（Ｔｓ）よりも高い暖機運転目標温度（Ｔｓｗ）が使用されることを特徴とする、内燃機関の冷却回路を制御する装置。   In an apparatus for controlling a cooling circuit of an internal combustion engine that controls a cooling circuit (3, 4, 5) of the internal combustion engine at a predetermined target temperature (Ts), the target temperature (Ts) is temporarily set for warm-up operation. An apparatus for controlling a cooling circuit of an internal combustion engine, characterized in that a higher warm-up target temperature (Tsw) is used.
JP2006553421A 2004-02-19 2005-01-10 Method and apparatus for controlling a cooling circuit of an internal combustion engine Expired - Fee Related JP4658971B2 (en)

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