JP2005351194A - Egr system - Google Patents

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JP2005351194A
JP2005351194A JP2004173741A JP2004173741A JP2005351194A JP 2005351194 A JP2005351194 A JP 2005351194A JP 2004173741 A JP2004173741 A JP 2004173741A JP 2004173741 A JP2004173741 A JP 2004173741A JP 2005351194 A JP2005351194 A JP 2005351194A
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engine
cooling water
egr cooler
egr
water jacket
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Takashi Ishimori
崇 石森
Hiroyuki Sugihara
啓之 杉原
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Hino Motors Ltd
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Hino Motors Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an EGR system capable of increasing an amount of recirculation of exhaust gas when a load is low relative to the engine rotation speed. <P>SOLUTION: A cooling water inlet of an EGR cooler 1 is connected to an inlet flow passage 4 for supplying cooling water to a water jacket of an engine 3, a cooling water outlet of the EGR cooler 1 is connected to an outlet flow passage 5 for feeding the cooling water from the water jacket of the engine 3, a flow adjustment valve 9a is incorporated on a water jacket inlet side of the engine 3, and a control unit 8 capable of expanding/reducing the opening of the flow adjustment valve 9a based on the rotation speed and the load of the engine 3 is provided. When the load gets low relative to the rotation speed of the engine 3, the control unit 8 reduces the opening of the flow adjustment valve 9a to increase the supply of the cooling water to the EGR cooler 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明はＥＧＲ装置に関するものである。   The present invention relates to an EGR device.

従来、排気再循環（ＥＧＲ:Exhaust Gas Recirculation）を適用した過給機付内燃機関では、エンジン排気経路から分流した排気を、ＥＧＲクーラ（水冷方式の管形熱交換器）が組み込んであるＥＧＲ管路によりエンジン吸気経路へ送給し、燃焼温度の低下を図ってＮＯｘの発生を低減させている（例えば、特許文献１、非特許文献１参照）。   Conventionally, in an internal combustion engine with a supercharger to which exhaust gas recirculation (EGR) is applied, an EGR pipe into which an EGR cooler (water-cooled tubular heat exchanger) is incorporated into the exhaust gas diverted from the engine exhaust path The fuel is fed to the engine intake path by the road, and the generation of NOx is reduced by reducing the combustion temperature (for example, see Patent Document 1 and Non-Patent Document 1).

図５は従来のＥＧＲ装置の一例の冷却水流通系を示すもので、ＥＧＲクーラ１の冷却水入口を、ウォータポンプ２からエンジン３のウォータジャケットへ冷却水を送給する入口流路４に接続し、ＥＧＲクーラ１の冷却水出口を、エンジン３のウォータジャケットから冷却水を送出する出口流路５に接続している。   FIG. 5 shows a cooling water circulation system as an example of a conventional EGR device, in which the cooling water inlet of the EGR cooler 1 is connected to an inlet flow path 4 for supplying cooling water from the water pump 2 to the water jacket of the engine 3. The cooling water outlet of the EGR cooler 1 is connected to the outlet flow path 5 for sending the cooling water from the water jacket of the engine 3.

すなわち、ＥＧＲクーラ１を流れる冷却水によってエンジン排気経路から分流した排気を冷却している。   That is, the exhaust gas diverted from the engine exhaust path is cooled by the cooling water flowing through the EGR cooler 1.

出口流路５にはサーモスタット６とラジエータ７が付帯しており、エンジン３から送出される冷却水は、その温度が高いと、ラジエータ７を経てウォータポンプ２に戻り、反対に温度が低いと、ラジエータ７を経ずにウォータポンプ２に戻る。
特開平９−２５６９１５号公報 「エンジン解剖学」ワーキングビークルズ Ｎｏ．２５ 株式会社 ぽると出版、平成１６年４月５日、ｐ３３−３５ A thermostat 6 and a radiator 7 are attached to the outlet flow path 5. When the temperature of the cooling water sent from the engine 3 is high, the cooling water returns to the water pump 2 through the radiator 7. On the contrary, when the temperature is low, Return to the water pump 2 without passing through the radiator 7.
Japanese Patent Laid-Open No. 9-256915 “Engine Anatomy” Working Vehicles 25 POTO PUBLISHING, April 5, 2004, p33-35

ところが図５に示すＥＧＲ装置では、ウォータポンプ２の冷却水吐出量がエンジン３の回転数に応じて増減し、また、ＥＧＲクーラ１の冷却水流通経路をエンジン３のウォータジャケットに並列に接続しているので、ＥＧＲクーラ１に送給される冷却水とエンジン３のウォータジャケットに送給される冷却水との割合が、ＥＧＲクーラ１及びエンジン３のウォータジャケットの圧力損失の差によって一義的に決まってしまう。   However, in the EGR device shown in FIG. 5, the cooling water discharge amount of the water pump 2 increases or decreases according to the rotational speed of the engine 3, and the cooling water flow path of the EGR cooler 1 is connected in parallel to the water jacket of the engine 3. Therefore, the ratio of the cooling water supplied to the EGR cooler 1 and the cooling water supplied to the water jacket of the engine 3 is uniquely determined by the difference in pressure loss between the EGR cooler 1 and the water jacket of the engine 3. It will be decided.

このため、車両が通常走行していてエンジン３の負荷が低いときに、排気再循環の量を今まで以上に増やそうとすると、ＥＧＲクーラ１への冷却水の供給量が相対的に不足することになるし、排気再循環量の増加を見越してウォータポンプ２の能力を大きくした場合には、エンジン３のウォータジャケットへの冷却水の供給量が過剰になる。   For this reason, when the vehicle is running normally and the load on the engine 3 is low, if the amount of exhaust gas recirculation is increased more than before, the amount of cooling water supplied to the EGR cooler 1 is relatively short. When the capacity of the water pump 2 is increased in anticipation of an increase in the exhaust gas recirculation amount, the amount of cooling water supplied to the water jacket of the engine 3 becomes excessive.

本発明は上述した実情に鑑みてなしたもので、エンジン回転数に対して負荷が低いときに排気再循環の量を増やせるＥＧＲ装置を提供することを目的としている。   The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an EGR device that can increase the amount of exhaust gas recirculation when the load is low with respect to the engine speed.

上記目的を達成するために、請求項１に記載の発明は、ＥＧＲクーラの冷却水入口を、エンジンのウォータジャケットへ冷却水を供給する入口流路に接続し、ＥＧＲクーラの冷却水出口を、エンジンのウォータジャケットから冷却水を送出する出口流路に接続し、ウォータジャケット入口側、ウォータジャケット出口側、ＥＧＲクーラの冷却水入口側、ＥＧＲクーラの冷却水出口側のうちの少なくともに一ヵ所に流量調整弁を組み込んでいる。   In order to achieve the above object, according to the first aspect of the present invention, the cooling water inlet of the EGR cooler is connected to an inlet flow path for supplying cooling water to the water jacket of the engine, and the cooling water outlet of the EGR cooler is Connected to the outlet flow path for sending cooling water from the engine water jacket, at least one of the water jacket inlet side, water jacket outlet side, EGR cooler cooling water inlet side, and EGR cooler cooling water outlet side A flow control valve is incorporated.

請求項２の記載の発明は、エンジン回転数及びエンジン負荷に基づいて流量調整弁の開度を拡縮し得る制御手段を備えている。   The invention described in claim 2 is provided with a control means capable of expanding and reducing the opening of the flow rate adjusting valve based on the engine speed and the engine load.

請求項１に記載の発明においては、流量調整弁の開度を適宜拡縮して、ＥＧＲクーラに送給される冷却水とエンジンのウォータジャケットに送給される冷却水との割合を最適な状態にする。   In the first aspect of the invention, the degree of opening of the flow rate adjustment valve is appropriately expanded and reduced so that the ratio of the cooling water supplied to the EGR cooler and the cooling water supplied to the water jacket of the engine is in an optimum state. To.

請求項２に記載の発明においては、エンジン回転数に対してエンジン負荷が低くなった際に制御手段が流量調整弁の開度を拡大または縮小し、ＥＧＲクーラへの冷却水の供給量を多くする。   In the second aspect of the present invention, when the engine load becomes lower than the engine speed, the control means enlarges or reduces the opening of the flow rate adjustment valve, and increases the amount of cooling water supplied to the EGR cooler. To do.

本発明のＥＧＲ装置によれば、下記のような優れた効果を奏し得る。   According to the EGR device of the present invention, the following excellent effects can be obtained.

（１）エンジンの回転数に対して負荷が低い場合に、ＥＧＲクーラへの冷却水の供給量を多くして排気再循環の量を増やせるので、より効果的なＮＯｘの低減を達成することができる。   (1) When the load is low with respect to the engine speed, the amount of cooling water supplied to the EGR cooler can be increased to increase the amount of exhaust gas recirculation, thereby achieving more effective NOx reduction. it can.

（２）エンジンの回転数に対して負荷が高い場合に、エンジンのウォータジャケットへ送給される冷却水の割合を増やせるので、エンジンの冷却性能を確保することができる。   (2) Since the ratio of the cooling water supplied to the water jacket of the engine can be increased when the load is high with respect to the engine speed, the cooling performance of the engine can be ensured.

以下、本発明の実施の形態を図面に基づき説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は本発明のＥＧＲ装置の実施の形態の第１の例の冷却水流通系を示すもので、図中、図５と同一の符号を付した部分は同一物を表わしている。   FIG. 1 shows a cooling water flow system according to a first example of an embodiment of the EGR apparatus of the present invention. In the figure, the same reference numerals as those in FIG. 5 denote the same parts.

このＥＧＲ装置は、ＥＧＲクーラ１のほうがエンジン３のウォータジャケットに比べて圧力損失が大きい場合を想定し、エンジン３の回転数と負荷をパラメータとして回転数に対して負荷が低くなるほど開度指令が小さくなるマップが予め設定してある制御ユニット（ＥＣＵ：Electronic Control Unit）８と、エンジン３のウォータジャケット入口側に組み込まれ且つ制御ユニット８によって遠隔操作される流量調整弁９ａを備えている。   This EGR device assumes that the pressure loss of the EGR cooler 1 is larger than that of the water jacket of the engine 3, and the opening degree command becomes smaller as the load becomes lower than the rotation speed with the rotation speed and load of the engine 3 as parameters. A control unit (ECU: Electronic Control Unit) 8 in which a smaller map is set in advance, and a flow rate adjusting valve 9 a incorporated in the water jacket inlet side of the engine 3 and remotely operated by the control unit 8 are provided.

この流量調整弁９ａの存在によって、ＥＧＲクーラ１に送給される冷却水とエンジン３のウォータジャケットに送給される冷却水との割合が一義的には決まらないことになる。   Due to the presence of the flow rate adjusting valve 9a, the ratio of the cooling water supplied to the EGR cooler 1 and the cooling water supplied to the water jacket of the engine 3 is not uniquely determined.

制御ユニット８は、アクセル開度センサ１０、エンジン回転センサ１１で得た検出値、及び前述したマップに基づいて流量調整弁９ａの開度を拡縮するように構成してある。   The control unit 8 is configured to expand and contract the opening of the flow rate adjusting valve 9a based on the detected value obtained by the accelerator opening sensor 10, the engine rotation sensor 11, and the map described above.

つまり、エンジン３の回転数に対して負荷が低くなるほど流量調整弁９ａの開度が縮小し、見掛け上、エンジン３のウォータジャケットへの冷却水の流入が抑えられて、ＥＧＲクーラ１への冷却水の供給量が多くなり、ウォータポンプ２の能力を大きくしなくても、排気再循環の量を今まで以上に増やすことが可能になる。   In other words, the lower the load with respect to the rotational speed of the engine 3, the smaller the opening of the flow rate adjusting valve 9 a, and apparently the inflow of cooling water into the water jacket of the engine 3 is suppressed to cool the EGR cooler 1. Even if the water supply amount is increased and the capacity of the water pump 2 is not increased, the amount of exhaust gas recirculation can be increased more than ever.

反対に、エンジン３の回転数に対して負荷が高くなるほど流量調整弁９ａの開度が拡大し、見掛け上、エンジン３のウォータジャケットへの冷却水の流入が多くなり、よって、エンジン３の冷却性能が確保される。   On the contrary, as the load increases with respect to the rotational speed of the engine 3, the opening degree of the flow rate adjusting valve 9 a increases, and apparently the inflow of cooling water into the water jacket of the engine 3 increases. Performance is ensured.

制御ユニット８は特にＥＧＲ装置だけのために独立した構成である必要はなく、通常の車載ＥＣＵを活用できる。   The control unit 8 is not particularly required to be an independent configuration only for the EGR device, and a normal in-vehicle ECU can be used.

図２は本発明のＥＧＲ装置の実施の形態の第２の例の冷却水流通系を示すもので、図中、図１と同一の符号を付した部分は同一物を表わしている。   FIG. 2 shows a cooling water flow system according to a second example of the embodiment of the EGR apparatus of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same parts.

このＥＧＲ装置は、エンジン３のウォータジャケットのほうがＥＧＲクーラ１に比べて圧力損失が大きい場合を想定し、エンジン３の回転数と負荷をパラメータとして回転数に対して負荷が低くなるほど開度指令が大きくなるマップが予め設定してある制御ユニット１２と、ＥＧＲクーラ１の冷却水入口側に組み込まれ且つ制御ユニット１２によって遠隔操作される流量調整弁９ｂを備えている。   This EGR device assumes that the pressure loss of the water jacket of the engine 3 is larger than that of the EGR cooler 1, and the opening degree command becomes smaller as the load becomes lower than the rotation speed with the rotation speed and load of the engine 3 as parameters. A control unit 12 in which a map to be enlarged is set in advance, and a flow rate adjusting valve 9b incorporated in the cooling water inlet side of the EGR cooler 1 and remotely operated by the control unit 12 are provided.

この流量調整弁９ｂの存在によって、ＥＧＲクーラ１に送給される冷却水とエンジン３のウォータジャケットに送給される冷却水との割合が一義的には決まらないことになる。   Due to the presence of the flow regulating valve 9b, the ratio of the cooling water supplied to the EGR cooler 1 and the cooling water supplied to the water jacket of the engine 3 is not uniquely determined.

制御ユニット１２は、アクセル開度センサ１０、エンジン回転センサ１１で得た検出値、及び前述したマップに基づいて流量調整弁９ａの開度を拡縮するように構成してある。   The control unit 12 is configured to expand or contract the opening of the flow rate adjusting valve 9a based on the detected value obtained by the accelerator opening sensor 10, the engine rotation sensor 11, and the map described above.

つまり、エンジン３の回転数に対して負荷が低くなるほど流量調整弁９ｂの開度が拡大し、見掛け上、ＥＧＲクーラ１への冷却水の供給量が多くなり、ウォータポンプ２の能力を大きくしなくても、排気再循環の量を今まで以上に増やすことが可能になる。   That is, the lower the load with respect to the rotational speed of the engine 3, the larger the opening of the flow rate adjusting valve 9 b, and apparently the amount of cooling water supplied to the EGR cooler 1 increases and the capacity of the water pump 2 increases. Even without this, the amount of exhaust gas recirculation can be increased more than ever.

反対に、エンジン３の回転数に対して負荷が高くなるほど流量調整弁９ｂの開度が縮小し、見掛け上、ＥＧＲクーラ１への冷却水の流入が抑えられ、よって、エンジン３の冷却性能が確保される。   On the contrary, as the load increases with respect to the rotational speed of the engine 3, the opening degree of the flow rate adjusting valve 9b is reduced, and apparently the inflow of cooling water to the EGR cooler 1 is suppressed. Secured.

制御ユニット１２は特にＥＧＲ装置だけのために独立した構成である必要はなく、通常の車載ＥＣＵを活用できる。   The control unit 12 does not need to have an independent configuration especially for the EGR device alone, and a normal in-vehicle ECU can be used.

図３は本発明のＥＧＲ装置の実施の形態の第３の例の冷却水流通系を示すもので、図中、図１と同一の符号を付した部分は同一物を表わしている。   FIG. 3 shows a third example of the cooling water flow system according to the embodiment of the EGR apparatus of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same components.

このＥＧＲ装置は、ＥＧＲクーラ１のほうがエンジン３のウォータジャケットに比べて圧力損失が大きい場合を想定し、制御ユニット８により遠隔操作される流量調整弁９ｃをエンジン３のウォータジャケット出口側に組み込んでいる。   This EGR device assumes that the pressure loss of the EGR cooler 1 is larger than that of the water jacket of the engine 3, and incorporates a flow control valve 9 c remotely operated by the control unit 8 on the water jacket outlet side of the engine 3. Yes.

この流量調整弁９ｃの存在によって、ＥＧＲクーラ１に送給される冷却水とエンジン３のウォータジャケットに送給される冷却水との割合が一義的には決まらないことになる。   Due to the presence of the flow rate adjusting valve 9c, the ratio of the cooling water supplied to the EGR cooler 1 and the cooling water supplied to the water jacket of the engine 3 is not uniquely determined.

つまり、エンジン３の回転数に対して負荷が低くなるほど流量調整弁９ｃの開度が縮小してエンジン３のウォータジャケットの流路抵抗が増大し、当該ウォータジャケットへの冷却水の流入が抑えられる。   That is, the lower the load with respect to the rotational speed of the engine 3, the smaller the opening degree of the flow rate adjusting valve 9 c and the greater the flow resistance of the water jacket of the engine 3, thereby suppressing the inflow of cooling water into the water jacket. .

これにより、ＥＧＲクーラ１への冷却水の供給量が多くなり、ウォータポンプ２の能力を大きくしなくても、排気再循環の量を今まで以上に増やすことが可能になる。   As a result, the amount of cooling water supplied to the EGR cooler 1 increases, and the amount of exhaust gas recirculation can be increased more than before without increasing the capacity of the water pump 2.

反対に、エンジン３の回転数に対して負荷が高くなるほど流量調整弁９ｃの開度が拡大してエンジン３のウォータジャケットの流路抵抗が減少し、当該ウォータジャケットへの冷却水の流入が多くなり、よって、エンジン３の冷却性能が確保される。   On the contrary, as the load increases with respect to the rotational speed of the engine 3, the opening degree of the flow rate adjusting valve 9c increases, the flow resistance of the water jacket of the engine 3 decreases, and the flow of cooling water into the water jacket increases. Therefore, the cooling performance of the engine 3 is ensured.

図４は本発明のＥＧＲ装置の実施の形態の第４の例の冷却水流通系を示すもので、図中、図２と同一の符号を付した部分は同一物を表わしている。   FIG. 4 shows a cooling water flow system of a fourth example of the embodiment of the EGR device of the present invention, and in the figure, the parts denoted by the same reference numerals as those in FIG. 2 represent the same items.

このＥＧＲ装置は、エンジン３のウォータジャケットのほうがＥＧＲクーラ１に比べて圧力損失が大きい場合を想定し、制御ユニット１２により遠隔操作される流量調整弁９ｄをＥＧＲクーラ１の冷却水出口側に組み込んでいる。   This EGR device assumes that the water jacket of the engine 3 has a larger pressure loss than the EGR cooler 1, and incorporates a flow rate adjusting valve 9d remotely operated by the control unit 12 on the cooling water outlet side of the EGR cooler 1. It is out.

この流量調整弁９ｄの存在によって、ＥＧＲクーラ１に送給される冷却水とエンジン３のウォータジャケットに送給される冷却水との割合が一義的には決まらないことになる。   Due to the presence of the flow rate adjusting valve 9d, the ratio of the cooling water supplied to the EGR cooler 1 and the cooling water supplied to the water jacket of the engine 3 is not uniquely determined.

つまり、エンジン３の回転数に対して負荷が低くなるほど流量調整弁９ｄの開度が拡大してＥＧＲクーラ１の流路抵抗が減少し、見掛け上、ＥＧＲクーラ１への冷却水の供給量が多くなり、ウォータポンプ２の能力を大きくしなくても、排気再循環の量を今まで以上に増やすことが可能になる。   That is, as the load decreases with respect to the rotational speed of the engine 3, the opening degree of the flow rate adjusting valve 9d increases and the flow path resistance of the EGR cooler 1 decreases, so that the amount of cooling water supplied to the EGR cooler 1 apparently increases. Even if the capacity of the water pump 2 is not increased, the amount of exhaust gas recirculation can be increased more than ever.

反対に、エンジン３の回転数に対して負荷が高くなるほど流量調整弁９ｄの開度が縮小してＥＧＲクーラ１の流路抵抗が増大し、見掛け上、ＥＧＲクーラ１への冷却水の流入が抑えられ、よって、エンジン３の冷却性能が確保される。   On the contrary, as the load increases with respect to the rotational speed of the engine 3, the opening degree of the flow rate adjusting valve 9 d decreases and the flow resistance of the EGR cooler 1 increases, and apparently the inflow of cooling water to the EGR cooler 1 flows. Therefore, the cooling performance of the engine 3 is ensured.

なお、本発明のＥＧＲ装置は上述の実施の形態のみに限定されるものではなく、本発明の要旨を逸脱しない範囲において変更を加え得ることは勿論である。   It should be noted that the EGR apparatus of the present invention is not limited to the above-described embodiment, and it goes without saying that modifications can be made without departing from the scope of the present invention.

本発明のＥＧＲ装置は、車両用のディーゼルエンジンをはじめとして各種の内燃機関に適用できる。   The EGR device of the present invention can be applied to various internal combustion engines including a diesel engine for vehicles.

本発明のＥＧＲ装置の実施の形態の第１の例を示す概念図である。It is a conceptual diagram which shows the 1st example of embodiment of the EGR apparatus of this invention. 本発明のＥＧＲ装置の実施の形態の第２の例を示す概念図である。It is a conceptual diagram which shows the 2nd example of embodiment of the EGR apparatus of this invention. 本発明のＥＧＲ装置の実施の形態の第３の例を示す概念図である。It is a conceptual diagram which shows the 3rd example of embodiment of the EGR apparatus of this invention. 本発明のＥＧＲ装置の実施の形態の第４の例を示す概念図である。It is a conceptual diagram which shows the 4th example of embodiment of the EGR apparatus of this invention. 従来のＥＧＲ装置の一例を示す概念図である。It is a conceptual diagram which shows an example of the conventional EGR apparatus.

符号の説明Explanation of symbols

１ ＥＧＲクーラ
３ エンジン排気経路
８ 制御ユニット（制御手段）
９ａ 流量調整弁
９ｂ 流量調整弁
９ｃ 流量調整弁
９ｄ 流量調整弁
１０ 制御ユニット（制御手段） 1 EGR cooler 3 Engine exhaust path 8 Control unit (control means)
9a Flow adjustment valve 9b Flow adjustment valve 9c Flow adjustment valve 9d Flow adjustment valve 10 Control unit (control means)

Claims (2)

ＥＧＲクーラの冷却水入口を、エンジンのウォータジャケットへ冷却水を供給する入口流路に接続し、ＥＧＲクーラの冷却水出口を、エンジンのウォータジャケットから冷却水を送出する出口流路に接続し、ウォータジャケット入口側、ウォータジャケット出口側、ＥＧＲクーラの冷却水入口側、ＥＧＲクーラの冷却水出口側のうちの少なくともに一ヵ所に流量調整弁を組み込んだことを特徴とするＥＧＲ装置。   The cooling water inlet of the EGR cooler is connected to an inlet flow path for supplying cooling water to the engine water jacket, the cooling water outlet of the EGR cooler is connected to an outlet flow path for sending cooling water from the engine water jacket, An EGR apparatus comprising a flow rate adjusting valve incorporated in at least one of a water jacket inlet side, a water jacket outlet side, a cooling water inlet side of the EGR cooler, and a cooling water outlet side of the EGR cooler. エンジン回転数及びエンジン負荷に基づいて流量調整弁の開度を拡縮し得る制御手段を備えた請求項１に記載のＥＧＲ装置。   The EGR device according to claim 1, further comprising a control unit that can expand and contract the opening of the flow rate adjustment valve based on the engine speed and the engine load.
JP2004173741A 2004-06-11 2004-06-11 Egr system Pending JP2005351194A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008051010A (en) * 2006-08-24 2008-03-06 Hino Motors Ltd Flow passage structure of coolant
JP2010038068A (en) * 2008-08-06 2010-02-18 Toyota Motor Corp Internal combustion engine, and control device for the same
WO2013011768A1 (en) * 2011-07-19 2013-01-24 いすゞ自動車株式会社 Engine cooling circuit
WO2013011767A1 (en) * 2011-07-19 2013-01-24 いすゞ自動車株式会社 Engine cooling circuit
FR2991715A1 (en) * 2012-06-12 2013-12-13 Peugeot Citroen Automobiles Sa Device for cooling thermal engine of vehicle, has coolant circuit including main loop with valve that does not block circulation of liquid coolant in cooling branch of exhaust gas recirculation system of engine
CN108397314A (en) * 2018-02-07 2018-08-14 贵阳吉利发动机有限公司 Cooling system for recycled exhaust gas, egr system and cooling system for recycled exhaust gas control method
KR20200011649A (en) * 2018-07-25 2020-02-04 현대자동차주식회사 Cooling system for engine and control method thereof
KR20200014538A (en) * 2018-08-01 2020-02-11 현대자동차주식회사 Control method of cooling system for vehicle

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008051010A (en) * 2006-08-24 2008-03-06 Hino Motors Ltd Flow passage structure of coolant
JP2010038068A (en) * 2008-08-06 2010-02-18 Toyota Motor Corp Internal combustion engine, and control device for the same
WO2013011768A1 (en) * 2011-07-19 2013-01-24 いすゞ自動車株式会社 Engine cooling circuit
WO2013011767A1 (en) * 2011-07-19 2013-01-24 いすゞ自動車株式会社 Engine cooling circuit
FR2991715A1 (en) * 2012-06-12 2013-12-13 Peugeot Citroen Automobiles Sa Device for cooling thermal engine of vehicle, has coolant circuit including main loop with valve that does not block circulation of liquid coolant in cooling branch of exhaust gas recirculation system of engine
CN108397314A (en) * 2018-02-07 2018-08-14 贵阳吉利发动机有限公司 Cooling system for recycled exhaust gas, egr system and cooling system for recycled exhaust gas control method
KR20200011649A (en) * 2018-07-25 2020-02-04 현대자동차주식회사 Cooling system for engine and control method thereof
KR102496796B1 (en) 2018-07-25 2023-02-06 현대자동차 주식회사 Cooling system for engine and control method thereof
KR20200014538A (en) * 2018-08-01 2020-02-11 현대자동차주식회사 Control method of cooling system for vehicle
KR102496811B1 (en) 2018-08-01 2023-02-06 현대자동차 주식회사 Control method of cooling system for vehicle

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