JPS6367007B2 - - Google Patents
Info
- Publication number
- JPS6367007B2 JPS6367007B2 JP56044985A JP4498581A JPS6367007B2 JP S6367007 B2 JPS6367007 B2 JP S6367007B2 JP 56044985 A JP56044985 A JP 56044985A JP 4498581 A JP4498581 A JP 4498581A JP S6367007 B2 JPS6367007 B2 JP S6367007B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- engine
- temperature
- water passage
- water pump
- 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
Links
- 239000000498 cooling water Substances 0.000 claims description 94
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 238000001816 cooling Methods 0.000 claims description 6
- 238000013021 overheating Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000009423 ventilation Methods 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
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P5/12—Pump-driving arrangements
-
- 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
-
- 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
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
-
- 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
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/027—Cooling cylinders and cylinder heads in parallel
-
- 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
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/028—Cooling cylinders and cylinder heads in series
-
- 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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/08—Cabin heater
-
- 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
- F01P7/162—Controlling of coolant flow the coolant being liquid by thermostatic control by cutting in and out of pumps
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【発明の詳細な説明】
本発明はエンジンの冷却装置の改良に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an engine cooling system.
一般に、エンジンにおいては、シリンダブロツ
クおよびシリンダヘツドにウオータジヤケツトを
設け、ウオータポンプの駆動により上記ウオータ
ジヤケツト内に冷却水を循環させて各部の冷却を
行うようにしている。 Generally, in an engine, a water jacket is provided on the cylinder block and the cylinder head, and cooling water is circulated within the water jacket by driving a water pump to cool each part.
しかして、上記ウオータポンプは通常エンジン
のクランク軸の回転がプーリを介してベルト伝動
され、エンジンの回転作動中にはウオータポンプ
は常時回転駆動されて冷却水を循環させているも
のであり、しかも、その循環水量（ウオータポン
プ回転数）は、外気温が高く、かつエンジンの燃
焼発熱量が大きい使用状況においてもオーバーヒ
ートの発生を阻止するに十分な冷却能力が確保で
きるよう設定されているものである。したがつ
て、寒冷地等においてエンジン温度が設定値以下
の低温時には、冷却水送給量が過剰となる場合が
あり、過冷却となつて暖機時間の増大となるとと
もに、不必要なウオータポンプの駆動はエンジン
の出力の損失となり燃費性の向上を阻害するもの
である。そこで、従来、特開昭53−136144号に示
すように、冷却水通路に冷却水を送給するウオー
タポンプを、エンジン回転に対して独立して駆動
制御可能とし、エンジン温度が設定値以下にある
ときにはウオータポンプによる冷却水の送給量を
低減し、エンジンの出力損失の減少による燃費性
の向上と暖機時間の短縮化を図るようにしたもの
が提案されている。 However, in the above-mentioned water pump, the rotation of the engine's crankshaft is usually transmitted through a belt through a pulley, and the water pump is constantly driven to rotate while the engine is rotating to circulate cooling water. The amount of circulating water (water pump rotation speed) is set to ensure sufficient cooling capacity to prevent overheating even when the outside temperature is high and the combustion heat of the engine is high. be. Therefore, when the engine temperature is lower than the set value in cold regions, etc., the amount of cooling water supplied may become excessive, resulting in supercooling, which increases the warm-up time, and requires unnecessary water pump operation. The drive results in a loss of engine output and impedes improvement in fuel efficiency. Therefore, as shown in Japanese Patent Application Laid-open No. 53-136144, the water pump that supplies cooling water to the cooling water passage can be driven and controlled independently of the engine rotation, and the engine temperature is kept below the set value. In some cases, it has been proposed to reduce the amount of cooling water supplied by the water pump to improve fuel efficiency and shorten warm-up time by reducing engine output loss.
しかしながら、上記従来例のごとく、低温時に
ウオータポンプを完全に停止させて冷却水の流れ
を自然対流にすると、局部的に過熱部が発生する
恐れがある。すなわち、燃焼室近傍（特に排気ポ
ート部分）のシリンダヘツドは高温燃焼ガスが接
触するために高温となるものであつて、エンジン
全体としては設定温度以下の冷機状態であつても
上記高温部は局部的に許容値を越えた過熱状態と
なつて、耐久性等に悪影響を与える不具合を有す
ることになる。 However, if the water pump is completely stopped at low temperatures and the flow of cooling water is made to flow by natural convection, as in the conventional example described above, there is a risk that locally overheated areas may occur. In other words, the cylinder head near the combustion chamber (particularly the exhaust port part) becomes hot due to contact with high-temperature combustion gas, and even if the engine as a whole is in a cold state below the set temperature, the high-temperature parts are localized. This results in overheating that exceeds the allowable value, resulting in problems that adversely affect durability and the like.
本発明はかかる点に鑑み、エンジンの冷却水通
路を、高温部を冷却する第１冷却水通路と、低温
部を冷却する第２冷却水通路との２系統に構成
し、エンジン温度が設定値以下にあるときには、
高温部用の第１冷却水通路にのみ冷却水を送給す
るようにして、最低限の冷却水送給量の確保によ
り局部的な過熱状態の発生を阻止する一方、エン
ジン全体としての出力損失の改善、暖機性の向上
を図るものである。 In view of this, the present invention configures the cooling water passage of the engine into two systems: a first cooling water passage that cools the high temperature part, and a second cooling water passage that cools the low temperature part, so that the engine temperature is set at a set value. When below,
By supplying cooling water only to the first cooling water passage for high-temperature parts, a minimum amount of cooling water can be ensured to prevent local overheating, while reducing the overall output loss of the engine. The aim is to improve the temperature and warm-up performance.
すなわち、本発明のエンジンの冷却装置は、エ
ンジンの高温部を冷却する第１冷却水通路と、エ
ンジンの低温部を冷却する第２冷却水通路とを備
え、上記両冷却水通路に冷却水を送給するウオー
タポンプをエンジン回転に対して独立して駆動制
御可能な駆動装置と、エンジン温度を検出する温
度センサーと、該温度センサーの出力を受けエン
ジン温度が設定値以下にあるとき上記駆動装置を
制御してウオータポンプによるエンジン全体での
冷却水の送給量を低減する制御装置とを設ける一
方、エンジン温度が上記設定値以下にあるとき上
記両冷却水通路のうち第１冷却水通路にのみ冷却
水を送給するように構成したことを特徴とするも
のである。 That is, the engine cooling device of the present invention includes a first cooling water passage that cools a high-temperature part of the engine and a second cooling water passage that cools a low-temperature part of the engine, and supplies cooling water to both of the cooling water passages. A drive device capable of driving and controlling a water pump that supplies water independently with respect to engine rotation, a temperature sensor that detects engine temperature, and the drive device that receives the output of the temperature sensor when the engine temperature is below a set value. A control device is provided to reduce the amount of cooling water fed to the entire engine by the water pump, and when the engine temperature is below the set value, the first cooling water passage of the two cooling water passages is provided. This feature is characterized in that it is configured so that only the cooling water is fed.
従つて、上記冷却装置においては、エンジン温
度が設定値以下にあるときは、低温部用の第２冷
却水通路へは冷却水が送給されず、高温部用の第
１冷却水通路のみに冷却水が送給されることか
ら、低温部の過冷却の防止と、高温部での局部的
な過熱の防止とが同時に行われることになり、ま
た、上記送給量の低減により第１冷却水通路への
冷却水の送給が過剰になることはなく、エンジン
の出力損失が減少する。 Therefore, in the above cooling system, when the engine temperature is below the set value, cooling water is not supplied to the second cooling water passage for the low temperature section, but only to the first cooling water passage for the high temperature section. Since cooling water is fed, overcooling of the low-temperature section and local overheating of the high-temperature section are simultaneously prevented, and by reducing the amount of water fed, the first cooling Excessive cooling water is not supplied to the water passages, reducing engine power loss.
以下、本発明の実施例を図面に沿つて説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
（実施例 １）
第１図において、１はエンジン、２はラジエー
タ３を備えた冷却水通路であつて、該冷却水通路
２はエンジン１の高温部１Ａを冷却する第１冷却
水通路２ａとエンジン１の低温部１Ｂを冷却する
第２冷却水通路２ｂとの２系統に分岐形成されて
いる。(Embodiment 1) In FIG. 1, 1 is an engine, 2 is a cooling water passage provided with a radiator 3, and the cooling water passage 2 is a first cooling water passage 2a that cools a high temperature section 1A of the engine 1. It is branched into two systems, including a second cooling water passage 2b that cools the low temperature section 1B of the engine 1.
図示の場合、第１冷却水通路２ａは、ラジエー
タ３の下流からエンジン１のシリンダヘツド４内
に形成されたウオータジヤケツト（高温部１Ａ）
を通つてラジエータ３の上流側に連通する一方、
第２冷却水通路２ｂは、ラジエータ３の下流から
エンジン１のシリンダブロツク５内に形成された
ウオータジヤケツト（低温部１Ｂ）を通つてラジ
エータ３の上流側に連通するように構成されてい
る。 In the illustrated case, the first cooling water passage 2a is a water jacket (high temperature section 1A) formed in the cylinder head 4 of the engine 1 from downstream of the radiator 3.
while communicating with the upstream side of the radiator 3 through
The second cooling water passage 2b is configured to communicate from the downstream side of the radiator 3 to the upstream side of the radiator 3 through a water jacket (low temperature section 1B) formed in the cylinder block 5 of the engine 1.
上記第１および第２冷却水通路２ａ，２ｂには
それぞれ冷却水を送給する第１および第２ウオー
タポンプ６ａ，６ｂが介設され、両ウオータポン
プ６ａ，６ｂはそれぞれ駆動装置７ａ，７ｂによ
りエンジン回転に対して独立して駆動制御可能に
構成されるとともに、この両駆動装置７ａ，７ｂ
が制御装置８に連係されて制御され、冷却水の送
給量が制御される。 First and second water pumps 6a and 6b for supplying cooling water are interposed in the first and second cooling water passages 2a and 2b, respectively, and both water pumps 6a and 6b are driven by drive devices 7a and 7b, respectively. Both drive devices 7a and 7b are configured to be able to be independently driven and controlled with respect to engine rotation.
is controlled in conjunction with the control device 8, and the amount of cooling water to be fed is controlled.
すなわち、上記第１および第２ウオータポンプ
６ａ，６ｂは、それぞれ伝動ベルト９ａ，９ｂを
介して第１および第２電動モータ１０ａ，１０ｂ
に連結されるとともに、両電動モータ１０ａ，１
０ｂの作動は制御装置８からの信号により制御さ
れる。 That is, the first and second water pumps 6a, 6b are connected to first and second electric motors 10a, 10b via transmission belts 9a, 9b, respectively.
and both electric motors 10a, 1
The operation of 0b is controlled by a signal from the control device 8.
また、１１はエンジン温度を検出する温度セン
サーであつて、該温度センサー１１の出力は前記
制御装置８に入力され、制御装置８はこの温度セ
ンサー１１の出力を受けて第１および第２駆動装
置７ａ，７ｂを制御するものであり、エンジン温
度が設定値以下にあるとき第２ウオータポンプ６
ｂの作動を停止するようにしたものである。 Reference numeral 11 denotes a temperature sensor that detects the engine temperature, and the output of the temperature sensor 11 is input to the control device 8, which receives the output of the temperature sensor 11 and controls the first and second drive devices. 7a and 7b, and when the engine temperature is below the set value, the second water pump 6
The operation of b is stopped.
尚、図示の場合、上記温度センサー１１は、エ
ンジン１のシリンダヘツド４に装着され、高温部
１Ａの冷却水温（第１冷却水通路２ａ）もしくは
壁温よりエンジン温度を検出するように構成され
ている。 In the illustrated case, the temperature sensor 11 is attached to the cylinder head 4 of the engine 1, and is configured to detect the engine temperature from the cooling water temperature (first cooling water passage 2a) or wall temperature of the high temperature section 1A. There is.
さらに、１２は第１冷却水通路２ａの一部をバ
イパスして接続された暖房装置（放熱器）であ
り、開閉弁１３により第１冷却水通路２ａから暖
房装置１２に供給される冷却水量が調整される。
尚、１４は暖房装置１２の送風フアンである。 Furthermore, 12 is a heating device (radiator) connected by bypassing a part of the first cooling water passage 2a, and the amount of cooling water supplied from the first cooling water passage 2a to the heating device 12 is controlled by the on-off valve 13. be adjusted.
In addition, 14 is a ventilation fan of the heating device 12.
エンジン温度に対する冷却水の送給量制御は、
第２図Ａ，Ｂに示すように、エンジン温度が設定
値T1以下のときには、第２ウオータポンプ６ｂ
を停止し、第１ウオータポンプ６ａのみ駆動し
て、第１冷却水通路２ａにのみ冷却水を送給する
とともに、エンジン１全体としての冷却水の送給
量を低減するものである。 Cooling water supply amount control for engine temperature is
As shown in FIG. 2A and B, when the engine temperature is below the set value T1 , the second water pump 6b
is stopped, and only the first water pump 6a is driven to feed cooling water only to the first cooling water passage 2a, and at the same time, the amount of cooling water fed to the engine 1 as a whole is reduced.
一方、エンジン温度が設定値T1を越えて上昇
した場合には、第２ウオータポンプ６ｂをも駆動
して第２冷却水通路２ｂにも冷却水を送給し、エ
ンジン１全体としての冷却水の送給量を増大させ
るものである。 On the other hand, when the engine temperature rises above the set value T1 , the second water pump 6b is also driven to supply cooling water to the second cooling water passage 2b, and the cooling water for the entire engine 1 is increased. This increases the amount of feed.
尚、第２図Ａは、冷却水の送給量すなわち第１
および第２ウオータポンプ６ａ，６ｂの回転数を
エンジン温度変化に対して一定とした例、つまり
制御装置８により単に第２電動モータ１０ｂの駆
動、停止を行うようにした制御方式の例である。
また、第２図Ｂは、エンジン温度の上昇に伴つて
冷却水の送給量すなわち第１および第２ウオータ
ポンプ６ａ，６ｂの回転数が増加するようにした
例、つまり制御装置８により電動モータ１０ａ，
１０ｂに印加する電力を温度センサー１１の出力
変化に対応させて制御する方式の例を示してい
る。 In addition, Fig. 2A shows the amount of cooling water supplied, that is, the first
This is an example in which the rotational speed of the second water pumps 6a, 6b is kept constant against changes in engine temperature, that is, an example of a control system in which the control device 8 simply drives and stops the second electric motor 10b.
FIG. 2B shows an example in which the amount of cooling water supplied, that is, the rotational speed of the first and second water pumps 6a, 6b increases as the engine temperature rises, that is, the control device 8 controls the electric motor. 10a,
An example of a method for controlling the power applied to the temperature sensor 10b in response to changes in the output of the temperature sensor 11 is shown.
（実施例 ２）
本例は、第３図に示すように、一つのウオータ
ポンプ６により冷却水を送給するようにしたもの
であり、エンジン１の高温部１Ａを冷却する第１
冷却水通路１５ａと、エンジン１の低温部１Ｂを
冷却する第２冷却水通路１５ｂとを備えた２系統
の冷却水通路１５に、１つのウオータポンプ６を
介設するとともに、該ウオータポンプ６より下流
の冷却水通路１５に、ウオータポンプ６から送給
された冷却水を第１冷却水通路１５ａもしくは第
２冷却水通路１５ｂに分流する割合を制御する制
御弁１６が介設されている。(Embodiment 2) In this embodiment, as shown in FIG. 3, cooling water is supplied by one water pump 6, and the first
One water pump 6 is interposed in two cooling water passages 15 including a cooling water passage 15a and a second cooling water passage 15b that cools the low-temperature section 1B of the engine 1. A control valve 16 is provided in the downstream cooling water passage 15 to control the rate at which the cooling water supplied from the water pump 6 is divided into the first cooling water passage 15a or the second cooling water passage 15b.
上記ウオータポンプ６には前例同様、電動モー
タ１０による駆動装置７が連係され、該電動モー
タ１０の作動が温度センサー１１を備えた制御装
置８により行われる。さらに、この制御装置８の
信号により制御弁１６の作動が制御される。 As in the previous example, a driving device 7 including an electric motor 10 is linked to the water pump 6, and the electric motor 10 is operated by a control device 8 including a temperature sensor 11. Furthermore, the operation of the control valve 16 is controlled by the signal from the control device 8.
その他の構成は前例と同じであり、同一構造に
は同一符号を付してその説明を省略する。 The other configurations are the same as in the previous example, and the same structures are given the same reference numerals and their explanations will be omitted.
本例においては、エンジン温度が設定値T1以
下のときには、制御弁１６は第１冷却水通路１５
ａのみを開くように作動されるとともに、ウオー
タポンプ６による冷却水の送給量が減少するよう
電動モータ１０の駆動が制御される。 In this example, when the engine temperature is below the set value T 1 , the control valve 16 operates in the first cooling water passage 15.
The electric motor 10 is operated so as to open only the opening a, and the drive of the electric motor 10 is controlled so that the amount of cooling water supplied by the water pump 6 is reduced.
一方、エンジン温度が設定値T1を越えて上昇
すると、制御弁１６は第１冷却水通路１５ａに加
えて第２冷却水通路１５ｂをも開くように作動さ
れるとともに、ウオータポンプ６による冷却水の
送給量が増大するよう電動モータ１０の駆動が制
御される。 On the other hand, when the engine temperature rises above the set value T1 , the control valve 16 is operated to open the second cooling water passage 15b in addition to the first cooling water passage 15a, and the water pump The drive of the electric motor 10 is controlled so that the amount of feed is increased.
その際、電動モータ１０の回転数すなわち冷却
水の送給量は、第２図Ａの如く設定値T1の上下
の領域においてエンジン温度の変化に対して一定
とするか、第２図Ｂの如くエンジン温度の変化に
対応させて増減するようにしてもよい。 At this time, the rotational speed of the electric motor 10, that is, the amount of cooling water supplied, is either kept constant with respect to changes in engine temperature in the range above and below the set value T1 as shown in FIG. 2A, or It may also be made to increase or decrease in response to changes in engine temperature.
（実施例 ３）
本例は、第４図に示すように、実施例２では第
１冷却水通路１５ａと第２冷却水通路１５ｂとが
並列に接続されていたのに対し、両者が直列に接
続された例である。(Embodiment 3) As shown in FIG. 4, in this embodiment, the first cooling water passage 15a and the second cooling water passage 15b were connected in parallel, whereas in the embodiment 2, the first cooling water passage 15a and the second cooling water passage 15b were connected in series. This is a connected example.
すなわち、ウオータポンプ６の下流に、まず、
エンジン１の高温部１Ａを冷却する第１冷却水通
路１７ａが接続され、続いて、制御弁１８を介し
てエンジン１の低温部１Ｂを冷却する第２冷却水
通路１７ｂが接続されており、ウオータポンプ６
の駆動装置７および制御装置８は前例と同様に形
成されている。 That is, downstream of the water pump 6, first,
A first cooling water passage 17a that cools the high temperature section 1A of the engine 1 is connected, and then a second cooling water passage 17b that cools the low temperature section 1B of the engine 1 is connected via a control valve 18. pump 6
The drive device 7 and the control device 8 are constructed in the same way as in the previous example.
本例においては、エンジン温度が設定値T1以
下の場合には、制御弁１８は第２冷却水通路１７
ｂを閉じるように作動されるとともに、ウオータ
ポンプ６による冷却水の送給量が減少するよう駆
動モータ１０が制御され、第１冷却水通路１７ａ
にのみ送給量の低減した冷却水が送給される。 In this example, when the engine temperature is below the set value T1 , the control valve 18
The drive motor 10 is operated to close the first cooling water passage 17a, and the drive motor 10 is controlled to reduce the amount of cooling water supplied by the water pump 6.
A reduced amount of cooling water is supplied only to the
一方、エンジン温度が設定値T1を越えて上昇
すると、制御弁１８は第２冷却水通路１７ｂを開
くように作動されるとともに、ウオータポンプ６
による冷却水の送給量が増大するよう電動モータ
１０の駆動が制御され、よつて、第２図Ａおよび
Ｂと同等の特性でもつて制御が行われる。 On the other hand, when the engine temperature rises above the set value T1 , the control valve 18 is operated to open the second cooling water passage 17b, and the water pump 6
The drive of the electric motor 10 is controlled so that the amount of cooling water supplied is increased, and therefore the control is performed with the same characteristics as those in FIGS. 2A and 2B.
尚、上記実施例２および実施例３においては、
第１冷却水通路１５ａ，１７ａおよび第２冷却水
通路１５ｂ，１７ｂの開閉制御を制御装置８によ
り電気的に制御される制御弁１６，１８（例えば
電磁弁）を使用して行うようにしているが、この
制御弁を冷却水の温度変化に応じて開閉作動する
サーモバルブにて構成し、エンジン温度が設定値
T1以下の場合には、制御装置８によりウオータ
ポンプ６による冷却水の送給量を低減するととも
に、サーモバルブの閉動により第１冷却水通路１
５ａ，１７ａにのみ冷却水を送給するようにして
もよい。 In addition, in the above-mentioned Example 2 and Example 3,
Opening/closing control of the first cooling water passages 15a, 17a and the second cooling water passages 15b, 17b is performed using control valves 16, 18 (for example, electromagnetic valves) electrically controlled by a control device 8. However, this control valve consists of a thermo valve that opens and closes according to changes in the temperature of the cooling water, so that the engine temperature remains at the set value.
If T 1 or less, the control device 8 reduces the amount of cooling water supplied by the water pump 6, and closes the thermo valve to close the first cooling water passage 1.
Cooling water may be supplied only to 5a and 17a.
また、上記各実施例においては、ウオータポン
プ６ａ，６ｂ，６の駆動装置７ａ，７ｂ，７とし
て電動モータ１０ａ，１０ｂ，１０を使用した例
を示したが、本発明はこれに限定されるものでは
なく、例えば、ウオータポンプをエンジン１の出
力軸に可変プーリ機構を介して連係して駆動する
方式の駆動装置とし、この可変プーリ機構の変速
比を制御するように構成してもよく、さらに、ウ
オータポンプをエンジンの出力軸にクラツチ機構
を介して連係して駆動する方式の駆動装置（実施
例２および３には適用不可）としてもよい。 Further, in each of the above embodiments, an example is shown in which the electric motors 10a, 10b, 10 are used as the drive devices 7a, 7b, 7 for the water pumps 6a, 6b, 6, but the present invention is not limited to this. Instead, for example, the water pump may be configured to be a driving device that is linked to the output shaft of the engine 1 via a variable pulley mechanism, and to control the gear ratio of this variable pulley mechanism. , a drive device (not applicable to the second and third embodiments) may be used in which the water pump is driven in conjunction with the output shaft of the engine via a clutch mechanism.
従つて、以上の如き本発明によれば、エンジン
温度が設定値以下にあるときには、エンジンの高
温部を冷却する第１冷却水通路にのみ低減した冷
却水を送給するようにして、最低限の冷却水送給
量の確保によりエンジンの低温部での過冷却を防
止しながら高温部での局部的な過熱状態の発生を
阻止する一方、ウオータポンプの不必要な駆動を
排除し、エンジンの出力損失の改善を図つて燃費
性を向上するとともに、暖機の促進を図ることが
できるものである。 Therefore, according to the present invention as described above, when the engine temperature is below the set value, the reduced amount of cooling water is supplied only to the first cooling water passage that cools the high temperature parts of the engine, thereby reducing the By ensuring the amount of cooling water supplied, this prevents overcooling in low-temperature parts of the engine and prevents localized overheating in high-temperature parts.It also eliminates unnecessary driving of the water pump and improves engine performance. It is possible to improve fuel efficiency by improving output loss and to promote warm-up.
図面は本発明の実施態様を例示し、第１図は実
施例１の全体構成を示す説明図、第２図Ａ，Ｂは
それぞれエンジン温度に対する冷却水送給量の制
御例を示す説明図、第３図は実施例２の全体構成
を示す説明図、第４図は実施例３の全体構成を示
す説明図である。
１……エンジン、１Ａ……高温部、１Ｂ……低
温部、２，１５，１７……冷却水通路、２ａ，１
５ａ，１７ａ……第１冷却水通路、２ｂ，１５
ｂ，１７ｂ……第２冷却水通路、３……ラジエー
タ、４……シリンダヘツド、５……シリンダブロ
ツク、６，６ａ，６ｂ……ウオータポンプ、７，
７ａ，７ｂ……駆動装置、８……制御装置、１
０，１０ａ，１０ｂ……電動モータ、１１……温
度センサー、１６，１８……制御弁。
The drawings illustrate embodiments of the present invention, and FIG. 1 is an explanatory diagram showing the overall configuration of Embodiment 1, and FIGS. 2A and B are explanatory diagrams each showing an example of controlling the amount of cooling water supplied to the engine temperature. FIG. 3 is an explanatory diagram showing the overall configuration of the second embodiment, and FIG. 4 is an explanatory diagram showing the entire configuration of the third embodiment. 1... Engine, 1A... High temperature section, 1B... Low temperature section, 2, 15, 17... Cooling water passage, 2a, 1
5a, 17a...first cooling water passage, 2b, 15
b, 17b...Second cooling water passage, 3...Radiator, 4...Cylinder head, 5...Cylinder block, 6, 6a, 6b...Water pump, 7,
7a, 7b...drive device, 8...control device, 1
0, 10a, 10b... electric motor, 11... temperature sensor, 16, 18... control valve.
Claims (1)
と、エンジンの低温部を冷却する第２冷却水通路
とを備え、上記両冷却水通路に冷却水を送給する
ウオータポンプをエンジン回転に対して独立して
駆動制御可能な駆動装置と、エンジン温度を検出
する温度センサーと、該温度センサーの出力を受
けエンジン温度が設定値以下にあるとき上記駆動
装置を制御してウオータポンプによるエンジン全
体での冷却水の送給量を低減する一方、エンジン
温度が上記設定値以下にあるとき上記両冷却水通
路のうち第１冷却水通路にのみ冷却水を送給する
ように構成したことを特徴とするエンジンの冷却
装置。1. A water pump is provided with a first cooling water passage that cools the high temperature part of the engine and a second cooling water passage that cools the low temperature part of the engine, and a water pump that supplies cooling water to both of the cooling water passages. a drive device that can be independently controlled; a temperature sensor that detects engine temperature; and a water pump that controls the drive device when the engine temperature is below a set value in response to the output of the temperature sensor; The cooling water supply amount is reduced, and the cooling water is supplied only to the first cooling water passage among the two cooling water passages when the engine temperature is below the set value. engine cooling system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4498581A JPS57159915A (en) | 1981-03-26 | 1981-03-26 | Cooling device for engine |
| US06/361,823 US4423705A (en) | 1981-03-26 | 1982-03-25 | Cooling system for liquid-cooled internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4498581A JPS57159915A (en) | 1981-03-26 | 1981-03-26 | Cooling device for engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57159915A JPS57159915A (en) | 1982-10-02 |
| JPS6367007B2 true JPS6367007B2 (en) | 1988-12-22 |
Family
ID=12706749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4498581A Granted JPS57159915A (en) | 1981-03-26 | 1981-03-26 | Cooling device for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57159915A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6224013U (en) * | 1985-07-29 | 1987-02-13 | ||
| JP6156304B2 (en) * | 2014-09-19 | 2017-07-05 | マツダ株式会社 | Engine cooling system |
| CN106852163A (en) * | 2014-10-28 | 2017-06-13 | 博格华纳公司 | Fluid system and manufacture and the method using the fluid system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56148610A (en) * | 1980-04-18 | 1981-11-18 | Toyota Motor Corp | Cooling device for engine |
-
1981
- 1981-03-26 JP JP4498581A patent/JPS57159915A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56148610A (en) * | 1980-04-18 | 1981-11-18 | Toyota Motor Corp | Cooling device for engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57159915A (en) | 1982-10-02 |
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