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GB2522848A - Exhaust gas recirculation system for internal combustion engines - Google Patents

Exhaust gas recirculation system for internal combustion engines Download PDF

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Publication number
GB2522848A
GB2522848A GB1401937.6A GB201401937A GB2522848A GB 2522848 A GB2522848 A GB 2522848A GB 201401937 A GB201401937 A GB 201401937A GB 2522848 A GB2522848 A GB 2522848A
Authority
GB
United Kingdom
Prior art keywords
egr
duct
internal combustion
exhaust gas
cylinder head
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.)
Withdrawn
Application number
GB1401937.6A
Other versions
GB201401937D0 (en
Inventor
Salvatore Mafrici
Fiorello Losano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GM Global Technology Operations LLC
Original Assignee
GM Global Technology Operations LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GM Global Technology Operations LLC filed Critical GM Global Technology Operations LLC
Priority to GB1401937.6A priority Critical patent/GB2522848A/en
Publication of GB201401937D0 publication Critical patent/GB201401937D0/en
Publication of GB2522848A publication Critical patent/GB2522848A/en
Withdrawn legal-status Critical Current

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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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • 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
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • 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
    • 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
    • F02M26/41—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
    • 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
    • F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • 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
    • F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
    • F02M26/44—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders in which a main EGR passage is branched into multiple passages

Landscapes

  • 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

Disclosed is an exhaust gas recirculation system, particularly for a Diesel engine having after treatment systems such as a Diesel Oxidation Catalyst, Lean NOx Trap and Diesel Particulate Filter. The invention specifically relates to an exhaust gas recirculation system of an internal combustion engine, the Exhaust Gas Recirculation system comprising an EGR duct 315 located downstream of an exhaust manifold 225, an EGR valve 320 within the EGR duct 315, an EGR main gallery 316 downstream of the duct 315 and a multitude of EGR outlet ducts 318 wherein each of the outlet ducts is connected to an intake duct 212 of a cylinder head of the internal combustion engine. A water passage acting as a coolant may be located close to the EGR duct and the EGR main gallery and EGR outlets may be located inside the cylinder head.

Description

EXHAUST GAS RECIRCULATION SYSTEM FOR INTERNAL COMBUSTION ENGINES
TECHNICAL FIELD
The present disclosure relates to an exhaust gas recirculation system of an internal combustion engine, the architecture of such system being able to avoid fouling and high temperature problems for engine components, which are impacted by the recirculation of the exhaust gas.
BACKGROUND
An internal combustion engine, particularly a highly efficient Diesel engine is normally provided with an exhaust gas aftertreatment system, for degrading and/or removing the pollutants from the exhaust gas emitted by the Diesel engine, before discharging it in the environment.
The after-treatment system of a Diesel vehicle can comprise an exhaust line for leading the exhaust gas from the Diesel engine to the environment, a Diesel Oxidation Catalyst (DOC) located in the exhaust line, for oxidizing hydrocarbon (HC) and carbon monoxides (GO) into carbon dioxide (GO2) and water (H20), a Lean NOx Trap (LNT), which is provided for trapping nitrogen oxides (NOx) contained in the exhaust gas and is located in the exhaust line and a Diesel Particulate Filter (DPF) located in the exhaust line downstream the DOG, for removing diesel particulate matter or soot from the exhaust gas.
To further reduce the emissions content, in particular NOx emissions, Diesel engines normally include an exhaust gas recirculaticn (EGR) system coupled between the exhaust manifold and the intake manifold. As known, the EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders. In a Diesel engine, the exhaust gas reduces some of the excess oxygen in the pre-combustion mixture. Because NOx forms primarily when a mixture of nitrogen and oxygen is subjected to high temperature, the lower combustion chamber temperatures caused by EGR reduces the amount of NOx the combustion generates.
EP 2 623 763 Al discloses a cylinder head containing a water jacket in which a passage for EGR gas is disposed. This layout can be useful to cool the EGR gas.
On the other hand, a need exists for a new architecture of the EGR system which avoids the above inconvenience, particularly fouling.
An object of an embodiment of the invention is to provide an EGR system, whose new layout avoids fouling and high temperature in the intake manifold and in the components located inside or close to the intake manifold.
This object is achieved by an exhaust gas recirculation system, by a cylinder head and by an internal combustion engine having the features recited in the independent claims.
The dependent claims delineate preferred and/or especially advantageous aspects.
SUMMARY
An embodiment of the disclosure provides an exhaust gas recirculation system of an internal combustion engine, comprising: -an EGR duct, located downstream of an exhaust manifold, -an EGR valve, located within the EGR duct, regulating the exhaust gas flow rate, -an EGR main gallery, downstream of said EGR duct, and -a multitude of EGR outlet ducts, downstream of said EGR main gallery, wherein each of said EGR outlet ducts is in fluid connection with an intake duct of a cylinder head of the internal combustion engine.
An advantage of this embodiment is that EGR gases flow through the EGR duct, the EGR main gallery and the EGR outlet ducts and then are directly inserted in the intake ducts of the engine. Therefore, EGR gases do not flow through the intake manifold, thus not impacting with fouling and high temperature the intake manifold and the components located close or inside the manifold, such as sensors, throttle body and, eventually, an integrated intercooler.
According to another embodiment, a water passage is located in proximity of the EGR duct.
An advantage of this embodiment is that the EGR gas does not need any external cooling, since it is cooled by a water passage located just in proximity of the EGR duct. The water passage could also be a water jacket, coaxial to the EGR duct.
According to a further embodiment, the EGR main gallery is a cylindrical bore, having a size substantially equal to the size of the EGR duct In this way, the respect of the continuity law of the exhaust gas flow rate is ensured.
According to a still further embodiment, the EGR main gallery and the multitude of EGR outlet ducts are located inside the cylinder head.
An advantage of this embodiment is that such architecture of the EGR system does not impact on the overall dimensions of the internal combustion engine, since all new parts of the system (EGR main gallery and EGR outlet ducts) can be located inside the cylinder head.
According to still another embodiment, the EGR main gallery and the multitude of EGR outlet ducts are machined in the cylinder head.
An advantage of this embodiment is that, since the cylinder head is a very complex engine component, wherever full of internal channels, the manufacturing of these ducts can be realized in a very precise way.
According to another embodiment, the EGR main gallery and the multitude of EGR outlet ducts are casted in the cylinder head.
This embodiment would not imply any further machining operations of the cylinder head.
According to a different embodiment the EGR system is configured as a short route EGR system.
This new EGR architecture is particularly suitable for short route EGR system. As known, a high pressure exhaust gas recirculation (HP-EGR) system or a short route EGR system recirculates a portion of an engine's exhaust gas, upstream of the aftertreatment system, back to the engine cylinders. On the other hand, a low pressure EGR system (LP-EGR) is characterized by a long route of the exhaust gases, since they are recirculated downstream of the aftertreatment devices towards the compressor inlet. Therefore, a short route EGR recirculates gases which are still hot (they are taken just at the outlet of the turbine) and dirty (no soot has been trapped, for example, by a particulate filter).
Another embodiment of the disclosure provides a cylinder head of an internal combustion engine comprising an EGR main gallery of an EGR system according to any of the previous embodiments.
A further embodiment of the disclosure provides an internal combustion engine having an exhaust gas recirculation system according to any of the previous embodiments.
According to another embodiment, the engine comprises an intake manifold and a multitude of intake ducts, located downstream of the intake manifold, and wherein each of said intake ducts is in fluid connection with an outlet duct of the EGR system.
According to a further embodiment, the intake manifold is made of a polyamide nylon based material, reinforced by glass fibers.
An advantage of this embodiment is that the intake manifold of an engine having the new EGR system, can be realized in a less expensive material. It can be made of plastic, which should not have very stringent requirements in terms of mechanical and thermal resistance, because of the absence inside the manifold of hot and dirty gases.
According to still another embodiment, the engine comprises a throttle valve, which is made of a polyamide nylon based material, reinforced by glass fibers.
For the same reason, the throttle valve can be made of plastic, which should not have very stringent requirements in terms of mechanical and thermal resistance, because no hot and dirty gases flow through the valve.
BRIEF DESCRIPTION OF THE DRAWINGS
The various embodiments will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 shows an automotive system.
Figure 2 is a section of an internal combustion engine belonging to the automotive system of figure 1.
Figure 3 is a schematic top view of an exhaust gas recirculation system, according to an embodiment of the present invention.
Figure 4 is a schematic lateral view of the exhaust gas recirculation system of Fig. 3.
DETAILED DESCRIPTION OF THE DRAWINGS
Some embodiments may include an automotive system 100, as shown in Figures 1 and 2, that includes an internal combustion engine (ICE) 110 having an engine block 120 defining at least one cylinder 125 having a piston 140 coupled to rotate a crankshaft 145. A cylinder head 130 cooperates with the piston 140 to define a combustion chamber 150.
A fuel and air mixture (not shown) is disposed in the combustion chamber 150 and ignited, resulting in hot expanding exhaust gasses causing reciprocal movement of the piston 140.
The fuel is provided by at least one fuel injector 160 and the air through at least one intake port 210. The fuel is provided at high pressure to the fuel injector 160 from a fuel rail 170 in fluid communication with a high pressure fuel pump 180 that increase the pressure of the fuel received from a fuel source 190.
Each of the cylinders 125 has at least two valves 215, actuated by a camshaft 135 rotating in time with the crankshaft 145. The valves 215 selectively allow air into the combustion chamber 150 from the port 210 and alternately allow exhaust gases to exit through a port 220. In some examples, a cam phaser 155 may selectively vary the timing between the camshaft 135 and the crankshaft 145.
The air may be distributed to the air intake port(s) 210 through an intake manifold 200. An air intake duct 205 may provide air from the ambient environment to the intake manifold 200. In other embodiments, a throttle valve 330 may be provided to regulate the flow of air into the manifold 200. In still other embodiments, a forced air system such as a turbocharger 230, having a compressor 240 rotationally coupled to a turbine 250, may be provided. Rotation of the compressor 240 increases the pressure and temperature of the air in the duct 205 and manifold 200. An intercooler 260 disposed in the duct 205 may reduce the temperature of the air. The turbine 250 rotates by receiving exhaust gases from an exhaust manifold 225 that directs exhaust gases from the exhaust ports 220 and through a series of vanes prior to expansion through the turbine 250. The exhaust gases exit the turbine 250 and are directed into an exhaust system 270. This example shows a fixed geometry turbine 250 including a waste gate 290. In other embodiments, the turbocharger 230 may be a variable geometry turbine (VGT) with a VGT actuator arranged to move the vanes to alter the flow 9f the exhaust gases through the turbine.
The exhaust system 270 may include an exhaust pipe 275 having one or more exhaust aftertreatment devices 280. The aftertreatment devices may be any device configured to change the composition of the exhaust gases. Some examples of aftertreatment devices 280 include1 but are not limited to, catalytic converters (two and three way), oxidation catalysts, lean NOx traps, hydrocarbon adsorbers, selective catalytic reduction (SCR) systems. Other embodiments may include an exhaust gas recirculation (EGR) system 300 coupled between the exhaust manifold 225 and the intake manifold 200. The EGR system 300 may include an EGR cooler 310 to reduce the temperature of the exhaust gases in the EGR system 300. An EGR valve 320 regulates a flow of exhaust gases in the EGR system 300.
The automotive system 100 may further include an electronic control unit (ECU) 450 in communication with one or more sensors 360 and/or devices associated with the ICE 110 Figs. 3-4 represent a schematic top view and a schematic side view of the EGR system, according to an embodiment of the present invention, and the surrounding engine
B
components. Hereafter, the description is particularly related to high pressure exhaust gas recirculation (HP-EGR) systems or short route EGR systems, which recirculate a portion of an engine's exhaust gas, upstream of the aftertreatment system, back to the engine cylinders.
A cylinder head 130 of an internal combust?on engine is shown, together with the exhaust manifold 225 and the intake manifold 200. Close to the intake manifold the throttle valve 330 is located. Inside the intake manifold some other components are located, such as one or more sensors 360 (for example, an air pressure sensor and an air temperature sensor) and an intercooler 260, which in this engine configuration is integrated in the intake manifold, as in many modern engines occur. As an example, the cylinder head is configured for a 4 cylinder 4 valve engine. In Fig. 3 both cylinders 125, intake ports 210, intake ducts 212, exhaust ports 220 and exhaust ducts 222 are shown. However, the same EGR architecture can be used for other engines, having a different number of cylinders and/or a different number of valves for each cylinder.
According to an embodiment of the present invention, the EGR gas is directly distributed in each inlet duct 212 of the cylinder head 130, in order to have a <cclean>> intake manifold in which all components are not affected by fouling or temperature. To this purpose, the EGR system 300 comprises an EGR duct 315, located downstream and in a fluid connection with the exhaust manifold 225, so that the EGR gas flows from the exhaust manifold through said channel, which can be manufactured in the cylinder head. An EGR valve 320 is located along the EGR duct, in this example close to the exhaust manifold, to regulate the exhaust gas flow rate. As known, the EGR valve is controlled by the strategies the ECU will manage, according to the engine operating conditions. In addition to the known components, the EGR system also comprises an EGR main gallery 316, which is located downstream of the EGR duct and is in fluid connection with the EGR duct. The EGR main gallery can be a cylindrical bore, located at least partially in the cylinder head, and have a size substantially equal to the size of the EGR duct 315, to respect the continuity law of the exhaust gas flow rate. Further, the EGR system also comprises a multitude of EGR outlet ducts 318, downstream and in fluid connection with the EGR main gallery 316. Therefore, each of said EGR outlet ducts can distribute EGR gas inside the corresponding intake duct 212 of the cylinder head. In the example of Fig. 3, the EGR outlet ducts are eight, that is to say, the same number of the intake ducts 212.
Preferably, a water passage 370 can be located in proximity of the EGR duct 315, in order to increase the cooling of the EGR, which is anyway beneficial for the engine, to reduce the amount of NOx. In fact, because NOx forms primarily when a mixture of nitrogen and oxygen is subjected to high temperature, the lower combustion chamber temperatures caused by EGR reduces the amount of NOx, the combustion generates. Cooled EGR further improves this advantage. Such water passage can also be a water jacket, having an annular passage, coaxial to the EGR duct 315.
Advantageously, the EGR main gallery and the EGR outlet ducts can be totally located inside the cylinder head. To realize these channels in the cylinder head, either machining or casting operations can be used. A machining operation will be chosen in case of very complex layout of the cylinder head (in other words, a cylinder head full of channels, having complicate geometries), in order to realize the EGR channels in a very precise way. A casting operation will be chosen in case of simpler layouts of the cylinder head, since casting does not imply any further machining operations of the cylinder head.
Summarizing, the present invention, avoiding the problem of fouling and high temperature in the intake manifold area, implies different and remarkable benefits.
First of all1 the intake manifold can be realized by means of less expensive plastic, instead of steel or cast iron. For example a polyamide nylon based materials, reinforced by glass fibers, can be thought for this intake manifold, comprising the new EGR architecture.
Moreover, the throttle body itself could be realized in plastic instead of steel or aluminum, for example, it can be molded from nylon, reinforced by glass fibers (30% or even less), thus reducing its cost and weight.
Furthermore, the sensors of the intake manifold are also located in a cleaner area, thus reducing risk of malfunctions and, finally, the intercooler for the compressed intake air can be integrated in the intake manifold without risks of soot deposit and, on the other hand, with positive impact on packaging and engine performances.
While at least one exemplary embodiment has been presented in the foregoing summary and detailed description, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration in any way. Rather, the foregoing summary and detailed description will provide those skilled in the art with a convenient road map for implementing at least one exemplary embodiment, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from ii-the scope as set forth in the appended claims and their legal equivalents.
REFERENCE NUMBERS
automotive system internal combustion engine 120 engine block cylinder cylinder head camshaft piston 145 crankshaft combustion chamber cam phaser fuel injector fuel injection system 170 fuel rail fuelpump fuel source intake manifold 205 air intake duct 210 intakeport 212 intake duct 215 valves 220 exhaust port 222 exhaust duct 225 exhaust manifold 230 turbocharger 240 compressor 245 turbocharger shaft 250 turbine 260 intercooler 270 exhaust system 275 exhaust pipe 280 aftertreatment devices 290 waste gate valve 295 waste gate actuator or electric pressure valve or boost pressure control valve 300 exhaust gas recirculation system 310 EGR cooler 315 EGR duct 316 EGR main gallery 3l8EGRoutletduct 320 EGR valve 330 throttle valve 360 sensor 370 water passage 450 ECU

Claims (12)

  1. CLAIMS1. An exhaust gas recirculation (EGR) system (300) of an internal combustion engine (110), comprising: -an EGR duct (315), located downstream of an exhaust manftold (225), -an EGR valve (320), located within the EGR duct, regulating the exhaust gas flow rate, -an EGR main gallery (316), downstream of said EGR duct, and -a multitude of EGR outlet ducts (318), downstream of said EGR main gallery (316), wherein each of said EGR outlet ducts is in fluid connection with an intake duct (212) of a cylinder head (IX) of the internal combustion engine.
  2. 2. EGR system according to claim 1, wherein a water passage (370) is located in proximity of the EGR duct (315).
  3. 3. EGR system according to claim 1 or 2, wherein the EGR main gallery (316) is a cylindrical bore, having a size substantially equal to the size of the EGR dud (315).
  4. 4. EGR system according to any of the preceding claims, wherein the EGR main gallery (316) and the multitude of EGR outlet duds (318) are located inside the cylinder head (130).
  5. 5. EGR system according to claim 4, wherein the EGR main gallery (316) and the multitude of EGR outlet duds (318) are machined in the cylinder head (130).
  6. 6. EGR system according to claim 4, wherein the EGR main gallery (316) and the multitude of EGR outlet ducts (318) are casted in the cylinder head (130).
  7. 7. EGR system according to any of the preceding claims, configured as a short route EGR system.
  8. 8. Cylinder head (130) of an intemal combustion engine (110) comprising an EGR main gallery (316) of an EGR system (300) according to any of the preceding claims.
  9. 9. Internal combustion engine (110) comprising an exhaust gas recirculation (EGR) system (300) according to any of the preceding claims.
  10. 10. Internal combustion engine (110) according to claim 9, wherein the engine comprises an intake manifold (200) and a multitude of intake ducts (212), located downstream of the intake manifold, and wherein each of said intake ducts (212) is in fluid connection with an outlet duct (318) of the EGR system (300).
  11. 11. Internal combustion engine (110) according to claim 10, wherein the intake manifold (200) is made of a polyamide nylon based material, reinforced by glass fibers.
  12. 12. Internal combustion engine (110) according to any of the claims 9-11, wherein the engine comprises a throttle valve (330), which is made of a polyamide nylon based material, reinforced by glass fibers.
GB1401937.6A 2014-02-05 2014-02-05 Exhaust gas recirculation system for internal combustion engines Withdrawn GB2522848A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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GB2522848A true GB2522848A (en) 2015-08-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020133977A1 (en) 2020-12-17 2022-06-23 Volkswagen Aktiengesellschaft exhaust gas recirculation assembly
EP4265890A3 (en) * 2022-03-31 2023-12-20 Suzuki Motor Corporation Cam angle sensor attaching structure for internal combustion engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5329912A (en) * 1991-12-19 1994-07-19 Yamaha Hatsudoki Kabushiki Kaisha Induction system for an internal combustion engine
JP2006052712A (en) * 2004-08-16 2006-02-23 Mitsubishi Motors Corp Exhaust gas recirculation device for internal combustion engine
FR2916245A3 (en) * 2007-05-16 2008-11-21 Renault Sas INTERNAL COMBUSTION ENGINE FOR A MOTOR VEHICLE WITH EXHAUST GAS RECIRCULATION SYSTEM
US20130087119A1 (en) * 2011-10-05 2013-04-11 Mahle Koenig Kommanditgesellschaft Gmbh & Co. Kg Engine cylinder and internal combustion engine having the engine cylinder
US20130306041A1 (en) * 2012-05-18 2013-11-21 Mazda Motor Corporation Exhaust gas recirculation device of multi-cylinder engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5329912A (en) * 1991-12-19 1994-07-19 Yamaha Hatsudoki Kabushiki Kaisha Induction system for an internal combustion engine
JP2006052712A (en) * 2004-08-16 2006-02-23 Mitsubishi Motors Corp Exhaust gas recirculation device for internal combustion engine
FR2916245A3 (en) * 2007-05-16 2008-11-21 Renault Sas INTERNAL COMBUSTION ENGINE FOR A MOTOR VEHICLE WITH EXHAUST GAS RECIRCULATION SYSTEM
US20130087119A1 (en) * 2011-10-05 2013-04-11 Mahle Koenig Kommanditgesellschaft Gmbh & Co. Kg Engine cylinder and internal combustion engine having the engine cylinder
US20130306041A1 (en) * 2012-05-18 2013-11-21 Mazda Motor Corporation Exhaust gas recirculation device of multi-cylinder engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020133977A1 (en) 2020-12-17 2022-06-23 Volkswagen Aktiengesellschaft exhaust gas recirculation assembly
EP4265890A3 (en) * 2022-03-31 2023-12-20 Suzuki Motor Corporation Cam angle sensor attaching structure for internal combustion engine

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