NL2029295B1 - Exhaust gas recirculation assembly - Google Patents

Exhaust gas recirculation assembly Download PDF

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Publication number
NL2029295B1
NL2029295B1 NL2029295A NL2029295A NL2029295B1 NL 2029295 B1 NL2029295 B1 NL 2029295B1 NL 2029295 A NL2029295 A NL 2029295A NL 2029295 A NL2029295 A NL 2029295A NL 2029295 B1 NL2029295 B1 NL 2029295B1
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NL
Netherlands
Prior art keywords
coolant
exhaust gas
temperature heat
heat exchanging
gas recirculation
Prior art date
Application number
NL2029295A
Other languages
Dutch (nl)
Inventor
Vincent Christian Evertse Marc
Original Assignee
Daf Trucks Nv
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Priority to NL2029295A priority Critical patent/NL2029295B1/en
Application granted granted Critical
Publication of NL2029295B1 publication Critical patent/NL2029295B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/24—Layout, e.g. schematics with two or more coolers
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/33—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage controlling the temperature of the recirculated gases
    • 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
    • F01P2060/16—Outlet manifold

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

An exhaust gas recirculation assembly arranged to cooperate with a diesel combustion engine cooled by a coolant circuit. The assembly comprises coolant inlet and outlet parts; and gas inlet and outlet parts connectable between an gas exhaust part and an air intake of the engine respectively. A high temperature heat exchanging part, is provided arranged for cooling EGR exhaust gas; a low temperature heat exchanging part is provided arranged for cooling EGR exhaust gas downstream of the high temperature heat exchanging part. The low temperature heat exchanging part is cooled by coolant received from the coolant inlet part. The high temperature exchanging part is cooled by coolant received from the low temperature exchanging part. A thermostatic mixing valve is provided in between said low and high temperature heat exchanging parts, that mixes coolant received from the low temperature heat exchanging part and coolant received from a first coolant line coupled to the motor coolant outlet. In an embodiment, the coolant circuit comprises a single radiator system and a single coolant pump.

Description

P129880NL00
Title: Exhaust gas recirculation assembly
The invention relates to an exhaust gas recirculation assembly arranged to cooperate with a diesel combustion engine. Typically, such an assembly comprises coolant inlet and outlet parts; and gas inlet and outlet parts connectable between an gas exhaust part and an air intake of the engine respectively. Typically, coolant 1s provided from a coolant circuit cooled by a radiator system, which coolant circuit is shared by the combustion engine.
Cooler EGR gas results in a lower inlet temperature which renders a higher volumetric efficiency and a better fuel consumption of the engine. Since temperatures of EGR exhaust gas can be very high, cooling in multiple stages may be a way to effectively cool the gases. However, during a cold start, excessive cooling of the EGR gases may lead to inefficient combustion and delay of reaching a favorable operating temperature. For example, it is important to heat the coolant as quickly as possible to an operating temperature for example in a range of 65- 91 ° Celsius before entering the engine, since low cooling temperatures can have the effect of increasing friction in the engine, which leads to increased fuel consumption and economic life reduction. To this end, it is known to utilize thermostatic mixing valves that may reduce the coolant flow to the radiator and or the exhaust recirculation assembly in a cold start or partial load case.
However, in view of the high temperatures it is difficult to design an exhaust gas recirculation assembly that can be cooled adequately, but that 1s also robust to the temperature stress that can arise in the heat exchanging parts. Furthermore, it is a challenge to provide a coolant circuit with a minimum number of functional parts, in particular, a single radiator system, that shares cooling power to both the engine and the EGR assembly,
since both may have different cooling challenges, especially in partial load or cold start conditions.
According to the invention at least one of these objects is obtained by providing an exhaust gas recirculation assembly arranged to cooperate with a diesel combustion engine that has engine coolant inlet and outlets and that is connected to a coolant circuit cooled by a radiator system. The assembly comprises coolant inlet and outlet parts; and gas inlet and outlet parts connectable between a gas exhaust part and an air intake of the engine respectively. The assembly is provided with a high temperature heat exchanging part, arranged for cooling EGR exhaust gas; and with a low temperature heat exchanging part, arranged for cooling EGR exhaust gas downstream of the high temperature heat exchanging part. The low temperature heat exchanging part is cooled by coolant received from the coolant inlet part. A thermostatic mixing valve is provided fluidly in between said low and a high temperature heat exchanging part, that mixes coolant received from the low temperature heat exchanging part and coolant received from a first coolant bypass line coupled to the motor coolant outlet.
The high temperature heat exchanging part is cooled by coolant received from the low temperature exchanging part and the coolant line.
The thermostatic mixing valve has the effect that both heat exchanging parts can be cooled according to different control schemes.
In a preferred embodiment, the thermostatic mixing valve is controlled to receive coolant from the low temperature heat exchanging part independent of its temperature. This may prevent shutting down of the coolant circuit, in particular of the coolant flow through the low temperature heat exchanging part, which could delay adequate heating of the coolant to an operating temperature.
According to another aspect of the invention a heavy duty commercial vehicle 1s provided comprising an exhaust recirculation assembly, wherein the vehicle comprises a diesel combustion engine that has engine coolant inlet and outlets and that is connected to a coolant circuit cooled by a radiator system. The heavy duty commercial vehicle preferably comprises coolant circuit comprising a single radiator system and a single coolant pump. With the coolant circuit setup for the commercial vehicle as proposed, an efficient single circuit design is provided wherein exhaust gas recirculation assembly and engine parts can be efficiently cooled. A preferred example is a circuit layout where the coolant inlet part of the exhaust recirculation assembly 1s connectable to the radiator system to receive cooled fluid and wherein the coolant outlet part is connectable to the motor coolant inlet. This setup optimizes cooling power of the EGR in full and partial load condition.
The invention will be further explained with reference to the
Figure, in which a non-limiting exemplary embodiment of a vehicle according to the invention is shown:
Fig. 1 shows a schematic setup of the exhaust recirculation assembly according to the invention;
Fig. 2 schematically shows a further embodiment of an exhaust recirculation assembly according to the invention;
Fig. 3 schematically shows a preferred circuit layout of the exhaust recirculation assembly according to the invention.
Turning to Figure 1, a schematic setup is provided for the exhaust recirculation assembly according to an aspect of the invention. The assembly comprises a coolant inlet part 10 and a coolant outlet parts 20. Gas inlet 30 and gas outlet parts 40 are connectable between a gas exhaust part and an air intake of the engine (not shown) respectively. The assembly is provided with a high temperature heat exchanging part 100, arranged for cooling
EGR exhaust gas that flows between the gas inlet and outlet parts 30, 40.
The exhaust gas has thus a high temperature, comparable to the exhaust gas temperature, exiting the exhaust valves. A high temperature heat exchanging part 100 is arranged for cooling hot exhaust gas flowing downstream to the low temperature heat exchanging part 200 where the partly cooled EGR gas is further cooled down by the low temperature heat exchanging part 200. In the figure, the parts 100, 200, may be directly connected with EGR gas channels 300 coupled between said gas inlet and outlet parts 30, 40 but this is not essential. Furthermore the high temperature heat exchanging part 100 and the low temperature heat exchanging 200 part may be provided within a single connected structure which has the benefit of reduction of parts and space requirement, but this is also not essential.
As can be seen in the Figure, the low temperature heat exchanging part 200 is cooled by coolant received from the coolant inlet part 10 and the high temperature heat exchanging part 100 is cooled by coolant received from the low temperature exchanging part 200. A thermostatic mixing valve 500 is provided, fluidly, between said low and high temperature heat exchanging parts. The mixing valve mixes coolant received from the low temperature heat 200 exchanging part and coolant received from a first coolant line 50 coupled to the motor coolant outlet. The coolant line 50 thus provides heated, that is, substantially uncooled coolant, directly from the motor coolant outlet, where heated coolant exits, in order to mix coolant of a lower temperature, received from the low temperature heat exchanging part 200 to a achieve coolant of a higher temperature suitable for entry into the high temperature heat exchanging part 100. This has the effect that the temperature difference in the high temperature heat exchanging part 100, in particular between coolant and exhaust recirculation gas, can be limited, which may prevent large thermal stresses in the heat exchanger and thereby increases lifetime. In addition, the thermostatic mixing valve 500 may be actively controlled during partial load or cold start conditions, to optimize the flow through the low temperature heat exchanging part 200.
The thermostatic mixing valve may be controlled to receive coolant from the low temperature heat exchanging part independent of its temperature, in particular, to prevent shut off of coolant through the low temperature heat 5 exchanging part 200 while the coolant temperature is below an operational control temperature for operating the engine. This prevents shutting down of the coolant circuit, in particular of the coolant flow through the low temperature heat exchanging part 200, which could delay adequate heating of the coolant to an operating temperature.
Thus, flow of coolant through the assembly can be efficiently controlled during cold start or partial load conditions where coolant is not yet at its (maximum) operational temperature. To this end a controller 550 may be provided. Controller 550 may be part of the mixing valve 500 but may also be part of the engine control unit or any other controlling part. The controller 550 may have control inputs, in particular temperature sensor control inputs, that may input operational temperatures of e.g. low temperature heat exchanger 200, high temperature heat exchanger 100 and engine operation temperatures.
Fig. 2 schematically shows a further embodiment of an exhaust recirculation assembly 1000 according to the invention. In this embodiment, the assembly may be a circuit part, that is a fluidly connected assembly of not necessarily mechanically connected parts. In the example, heat exchanging parts 100, 200 fluidly connected in series with thermostatic mixing valve 500 and a coolant circuit pump 400. At the same time, heat exchanging parts 100, 200 may be coupled to a single exhaust gas channel, as 1s conventional. In the Figure representative operational temperatures are provided in full load (FL) and partial load (PL) conditions. Specifically, in the example, a full load condition may have unmixed coolant, in particular, where the coolant line 50 is shut off, and wherein coolant is cooled to about 90 ° Celsius, which, in practice may be lower, depending on the radiator design to values ranging from 75 ° to 91 ° Celsius. In partial load or cold start conditions, the coolant may have values, for the low temperature heat exchanger part of about 60 ° Celsius, more specifically, ranging between 40 ° to 75 ° Celsius, and the high temperature heat exchanging part may be operated for coolant entering at about 80 ° Celsius, more specifically, in a range between 75 ° and 90 °Celsius.
Fig 3 shows a practical embodiment of the exhaust recirculation assembly in an exemplary preferential circuit layout 2000. As will be explained, coolant circuit pump 400 may be the only pump in the circuit 2000, since the circuit layout may essentially provide a single serial flow of coolant. The coolant pump is in the example provided between the first and second heat exchanging, preferably downstream of the thermostatic mixing valve. The pump is thus upstream the high temperature heat exchanger which provides compression in the coolant when entering the heat exchanger and prevents coolant from boiling. At the same time the pump provides a suction pressure that directs the flow in coolant line 50 to the thermostatic valve.
Such a single serial flow of coolant through the exhaust recirculation assembly and the engine may be further characterized in that the motor coolant inlet 810 is connected to the exhaust gas recirculation assembly substantially without a parallel branch connected to the radiator, so that the engine effectively receives coolant that is heated by the exhaust recirculation assembly. In this circuit layout 2000 a second thermostatic mixing valve 600 is provided between the outlet of the radiator system 700 and the coolant inlet part of the low temperature heat exchanging part 200.
The second thermostatic valve may be a passive valve that mixes heated coolant from coolant line 60 in order to keep coolant at a minimal desired temperature, and that shuts off coolant line 60 when coolant entering the heat exchanger 200 is sufficiently heated, but also to keep the coolant temperature at a minimal desired temperature at the entry of part 200 during partial load. Specifically the passive thermostatic valve may be set to a minimal coolant set temperature for requiring partial load cooling of the engine e.g. to the set temperature ranges between 65 and 91 ° Celsius.
Valve 600 accordingly mixes coolant received from outlet of the radiator system 700 and coolant received from a coolant line 830 that is coupled to the motor coolant outlet 820.
The coolant inlet part of low temperature heat exchanging part 200, in this example, is directly connected to the radiator system 700 to receive cooled fluid that can be maximally cooled. This has as a benefit that the full cooling power of the coolant circuit 2000 is used to cool EGR recirculation gas. The coolant outlet part of high temperature heat exchanging part 100 is connectable to the motor coolant inlet, while keeping optimal operation temperatures for the engine 800. In the circuit 2000 a coolant line 830 exits from the motor engine coolant outlet 820, effectively branching of a main return circuit line 710 passing through radiator 700.
This coolant line can be used to provide heated coolant to the mixing valves 500 and 600, in order to provide a mixed coolant of a cold temperature portion, received from the outlet of radiator 700, and a hot temperature portion, received from engine outlet 820. Accordingly, a coolant line 830 may fluidly connect with first and second coolant lines 50, 60, coupled to respective thermostatic mixing valves 500, 600. These coolant lines are thus coupled to the motor coolant outlet 820 in parallel to a circuit line 710 connecting to the radiator system 700.

Claims (18)

ConclusiesConclusions 1. Een uitlaatgasrecirculatiesamenstel dat is ingericht om samen te werken met een diesel verbrandingsmotor, die motorkoelmiddelingang en -uitgangen heeft en die verbonden is met een koelmiddelcircuit dat gekoeld wordt door een radiateursysteem; waarbij het uitlaatgasrecirculatiesamenstel omvat: — koelmiddel-ingangsdelen en -uitgangsdelen; en gas- ingangsdelen en -uitgangsdelen die respectievelijk te verbinden zijn tussen een gas-uitlaatdeel en een luchtinlaat van de motor; — een hoge-temperatuur warmtewisselend deel, dat is ingericht voor het koelen van EGR uitlaatgas; — een lage-temperatuur warmtewisselend deel, dat 1s ingericht voor het verder koelen van EGR uitlaatgas stroomafwaarts van het hoge-temperatuur warmtewisselende deel; — waarbij het lage-temperatuur warmtewisselende deel wordt gekoeld door koelmiddel dat ontvangen wordt vanuit het koelmiddel-ingangsdeel; — waarbij het hoge-temperatuur warmtewisselende deel wordt gekoeld door koelmiddel dat ontvangen wordt vanuit het lage-temperatuur warmtewisselende deel; — waarbij een thermostatische mengklep is verschaft, die koelmiddel dat ontvangen wordt vanuit het lage- temperatuur warmtewisselende deel mengt met koelmiddel dat ontvangen wordt vanuit een eerste koelmiddelleiding die gekoppeld is met de motorkoelmiddeluitgang.An exhaust gas recirculation assembly adapted to cooperate with a diesel internal combustion engine, having engine coolant input and outputs and connected to a coolant circuit cooled by a radiator system; wherein the exhaust gas recirculation assembly comprises: - coolant inlet and outlet parts; and gas input parts and output parts respectively connectable between a gas outlet part and an air inlet of the engine; — a high-temperature heat exchange part, which is arranged for cooling EGR exhaust gas; — a low-temperature heat exchange section, which is adapted to further cool EGR exhaust gas downstream of the high-temperature heat exchange section; - wherein the low temperature heat exchanging part is cooled by refrigerant received from the refrigerant input part; — wherein the high temperature heat exchanging part is cooled by refrigerant received from the low temperature heat exchanging part; - wherein a thermostatic mixing valve is provided, which mixes refrigerant received from the low temperature heat exchanging section with refrigerant received from a first refrigerant line coupled to the engine coolant outlet. 2. Het uitlaatgasrecirculatiesamenstel volgens één van de voorgaande conclusies, waarbij de eerste thermostatische mengklep is geregeld om koelmiddel te ontvangen vanuit het lage-temperatuur warmtewisselende deel onafhankelijk van haar temperatuur.The exhaust gas recirculation assembly according to any one of the preceding claims, wherein the first thermostatic mixing valve is controlled to receive refrigerant from the low temperature heat exchanging section independently of its temperature. 3. Het uitlaatgasrecirculatiesamenstel volgens conclusie 1, waarbij het koelmiddel-ingangsdeel te verbinden is met het radiateursysteem om koelvloeistof te ontvangen en waarbij het koelmiddel- uitgangsdeel te verbinden is met de motorkoelmiddelingang.The exhaust gas recirculation assembly according to claim 1, wherein the coolant inlet portion is connectable to the radiator system to receive coolant and wherein the coolant outlet portion is connectable to the engine coolant inlet. 4. Het uitlaatgasrecirculatiesamenstel volgens conclusie 1, waarbij een tweede thermostatische mengklep is verschaft tussen de uitgang van het radiateursysteem en het koelmiddel-ingangsdeel van het uitlaatgasradiateursamenstel, die koelmiddel dat ontvangen wordt vanuit de uitgang van het radiateursysteem mengt met koelmiddel dat ontvangen wordt vanuit een tweede koelmiddelleiding die gekoppeld is met de motorkoelmiddeluitgang.The exhaust gas recirculation assembly according to claim 1, wherein a second thermostatic mixing valve is provided between the outlet of the radiator system and the coolant inlet portion of the exhaust gas radiator assembly, which mixes coolant received from the outlet of the radiator system with coolant received from a second coolant line connected to the engine coolant outlet. 5. Het uitlaatgasrecirculatiesamenstel volgens conclusie 2, waarbij de tweede thermostatische mengklep passief is, en ingesteld is op een minimum koelmiddeltemperatuur voor het lage-temperatuur warmtewisselende deel.The exhaust gas recirculation assembly of claim 2, wherein the second thermostatic mixing valve is passive, and is set to a minimum refrigerant temperature for the low temperature heat exchanging portion. 6. Het uitlaatgasrecirculatiesamenstel volgens conclusie 2, waarbij de ingestelde temperatuur tussen 65 en 91 “Celcius ligt.The exhaust gas recirculation assembly of claim 2, wherein the set temperature is between 65 and 91°C. 7. Het wtlaatgasrecirculatiesamenstel volgens één van de voorgaande conclusies, waarbij de eerste thermostatische mengklep actief geregeld 1s.The exhaust gas recirculation assembly according to any one of the preceding claims, wherein the first thermostatic mixing valve is actively controlled. 8. Het uitlaatgasrecirculatiesamenstel volgens één van de voorgaande conclusies, waarbij de eerste thermostatische mengklep is geregeld door een gemeten koelmiddeltemperatuur.The exhaust gas recirculation assembly according to any of the preceding claims, wherein the first thermostatic mixing valve is controlled by a measured coolant temperature. 9. Het uitlaatgasrecirculatiesamenstel volgens één van de voorgaande conclusies, waarbij de eerste thermostatische mengklep wordt geregeld op een ingestelde koelmiddeltemperatuur voor het hoge- temperatuur warmtewisselende deel, die tussen 75 en 91 “Celcius ligt.The exhaust gas recirculation assembly according to any one of the preceding claims, wherein the first thermostatic mixing valve is controlled to a set refrigerant temperature for the high temperature heat exchanging part, which is between 75 and 91°C. 10. Het uitlaatgasrecirculatiesamenstel volgens één van de voorgaande conclusies, waarbij de eerste thermostatische mengklep is geregeld om een temperatuurverschil tussen het uitlaatgas en het koelmiddel te beperken.The exhaust gas recirculation assembly according to any one of the preceding claims, wherein the first thermostatic mixing valve is controlled to limit a temperature difference between the exhaust gas and the refrigerant. 11.Het uitlaatgasrecirculatiesamenstel volgens één van de voorgaande conclusies, waarbij het hoge-temperatuur warmtewisselende deel en het lage-temperatuur warmtewisselende deel zijn voorzien van een direct verbonden EGR-gaskanaal, dat gekoppeld is met de gas- ingangsdelen en -uitgangsdelen.The exhaust gas recirculation assembly according to any one of the preceding claims, wherein the high temperature heat exchanging part and the low temperature heat exchanging part have a directly connected EGR gas channel coupled to the gas input parts and output parts. 12. Het uitlaatgasrecirculatiesamenstel volgens één van de voorgaande conclusies, waarbij het hoge-temperatuur warmtewisselende deel en het lage-temperatuur warmtewisselende deel zijn verschaft in een enkele verbonden constructie.The exhaust gas recirculation assembly according to any one of the preceding claims, wherein the high temperature heat exchanging part and the low temperature heat exchanging part are provided in a single connected structure. 13. Het uitlaatgasrecirculatiesamenstel volgens één van de voorgaande conclusies, waarbij het hoge-temperatuur warmtewisselende deel en het lage-temperatuur warmtewisselende deel zijn verschaft op een integrale manier.The exhaust gas recirculation assembly according to any one of the preceding claims, wherein the high temperature heat exchanging part and the low temperature heat exchanging part are provided in an integral manner. 14. Het uitlaatgasrecirculatiesamenstel volgens één van de voorgaande conclusies, waarbij de motorkoelmiddelingang is verbonden met het wtlaatgasrecirculatiesamenstel zonder een parallelle aftakking naar de radiateur.The exhaust gas recirculation assembly according to any preceding claim, wherein the engine coolant inlet is connected to the exhaust gas recirculation assembly without a parallel branch to the radiator. 15.Het uitlaatgasrecirculatiesamenstel volgens één van de voorgaande conclusies, waarbij de eerste en/of tweede koelmiddelleidingen zijn gekoppeld met de motorkoelmiddeluitgang, parallel aan een circuitleiding die verbonden is met het radiateursysteem.The exhaust gas recirculation assembly according to any of the preceding claims, wherein the first and/or second coolant conduits are coupled to the engine coolant outlet parallel to a circuit conduit connected to the radiator system. 16. Een zwaar-bedrijfsvoertuig omvattende een diesel verbrandingsmotor, die motorkoelmiddelingang en -uitgangen heeft en die verbonden is met een koelmiddelcircuit dat gekoeld wordt door een radiateursysteem, en omvattende een utlaatgasrecirculatiesysteem volgens één van de voorgaande conclusies.A heavy duty vehicle comprising a diesel internal combustion engine, having engine coolant input and outputs and connected to a coolant circuit cooled by a radiator system, and comprising an exhaust gas recirculation system according to any preceding claim. 17.Een zwaar-bedrijfsvoertuig volgens conclusie 16, waarbij het koelmiddelcircuit een enkel radiateursysteem omvat en een enkele koelmiddelpomp.A heavy duty vehicle according to claim 16, wherein the coolant circuit comprises a single radiator system and a single coolant pump. 18.Een zwaar-bedrijfsvoertuig volgens conclusie 16, waarbij de koelmiddelpomp is verschaft tussen het eerste en tweede warmtewisselende, bij voorkeur stroomafwaarts van de thermostatische mengklep.A heavy-duty vehicle according to claim 16, wherein the coolant pump is provided between the first and second heat exchangers, preferably downstream of the thermostatic mixing valve.
NL2029295A 2021-09-30 2021-09-30 Exhaust gas recirculation assembly NL2029295B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007092715A (en) * 2005-09-30 2007-04-12 Hino Motors Ltd Egr system for engine
WO2013151079A1 (en) * 2012-04-05 2013-10-10 株式会社 豊田自動織機 Rankine cycle device
DE102015016783A1 (en) * 2015-12-23 2016-08-11 Daimler Ag Device for recovering energy from waste heat of an internal combustion engine of a motor vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007092715A (en) * 2005-09-30 2007-04-12 Hino Motors Ltd Egr system for engine
WO2013151079A1 (en) * 2012-04-05 2013-10-10 株式会社 豊田自動織機 Rankine cycle device
DE102015016783A1 (en) * 2015-12-23 2016-08-11 Daimler Ag Device for recovering energy from waste heat of an internal combustion engine of a motor vehicle

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