GB2505477A - Air intake module for an engine - Google Patents

Air intake module for an engine Download PDF

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Publication number
GB2505477A
GB2505477A GB1215537.0A GB201215537A GB2505477A GB 2505477 A GB2505477 A GB 2505477A GB 201215537 A GB201215537 A GB 201215537A GB 2505477 A GB2505477 A GB 2505477A
Authority
GB
United Kingdom
Prior art keywords
air intake
engine
cavity
passage
air
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Withdrawn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
GB1215537.0A
Other versions
GB201215537D0 (en
Inventor
Sujay Ramachandra Pawar
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.)
Perkins Engines Co Ltd
Original Assignee
Perkins Engines Co Ltd
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 Perkins Engines Co Ltd filed Critical Perkins Engines Co Ltd
Priority to GB1215537.0A priority Critical patent/GB2505477A/en
Publication of GB201215537D0 publication Critical patent/GB201215537D0/en
Priority to GB1313337.6A priority patent/GB2506260B/en
Publication of GB2505477A publication Critical patent/GB2505477A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/104—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
    • F02B37/183—Arrangements of bypass valves or actuators therefor
    • F02B37/186—Arrangements of actuators or linkage for bypass valves
    • 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
    • F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
    • 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

Abstract

This disclosure is directed to an air intake module for an engine. The problem addressed is the protection of a boost control valve from excessive heat and/or contaminants. An air intake module for an engine, comprises an air intake conduit (10, fig.2) defining a passage extending from an inlet to an outlet. An EGR intake (40, fig.2) is formed in the conduit (10) to supplying recirculated exhaust gas into the passage. A cavity 190 is provided in communication with the passage. A boost control valve 130 is arranged to control a flow of gas between the cavity 190 and a pressure supply outlet 120. The cavity and the air intake conduit may form a single unitary body or the cavity may be formed in a separate pressure supply unit. A method of manufacturing an air intake module is also disclosed.

Description

AIR INTAKE MODULE FOR AN ENGINE
Technical Field
This disclosure is directed to an air intake module for an engine.
Background
Engines, for example internal combustion engines, are often provided with a turbocharger for providing a pressurised supply of charge air to the air intake of the engine.
A turbocharger comprises a compressor for compressing intake air to supply pressurised charge air to the engine.
The turbocharger also comprises a turbine which is powered by the flow of exhaust gas leaving the engine in order to drive the compressor.
At certain engine speeds and/or loads, it may be desirable to reduce the amount of exhaust gas driving the turbine to thereby reduce the compression work of the compressor. This is typically effected by way of a boost limiting valve, which opens by a varying amount to allow exhaust gas leaving the engine to bypass the turbine of the turbocharger. It is known to actuate a boost limiting valve mechanically using an actuator driven by a pressure supply line in communication with the engine air intake.
Modern engine management systems include a boost control valve at the engine air intake to control flow along the pressure supply line.
Summary of the disclosure
According to a first aspect of the present disclosure there is provided an air intake module for an engine. The air intake module comprises an air intake conduit defining a passage extending from an inlet to an outlet. The air intake module comprises a source of heated and/or contaminated air. The air intake module comprises a cavity in communication with the passage. The air intake module comprises a boost control valve arranged to control a flow of gas between the cavity and a pressure supply outlet.
According to a second aspect of the present disclosure there is provided an engine. The engine comprises an air Intake module. The engine comprises an exhaust gas recirculation system forming the source of heated and/or contaminated air. The engine comprises a turbocharger arranged to provide compressed air to the inlet of the air intake conduit. The turbocharger includes a boost limiting valve for controlling the flow of exhaust gas from the engine through a turbine of the turbocharger. The boost limiting valve is actuated by an actuator in communication with the pressure supply outlet.
According to a third aspect of the present disclosure there is provided a method of manufacturing an air intake module for an engine. The method comprises the step of casting an intermediate to define a cavity and a passage extending from an inlet to an outlet. The method comprises the step of machining the intermediate to form an air intake conduit.
Brief Description of the Drawings
For a better understanding of the disclosure, and to show how the same may be put into effect, reference is now made, byway of example only, to the accompanying drawings in which: Figure 1 shows a cut-away perspective view of an engine air intake module; Figure 2 shows a cut-away perspective view of a first embodiment of an engine air intake module according to the
disclosure;
Figure 3 shows a cut-away perspective view of a pressure supply unit forming part of a second embodiment of an air intake module according to the disclosure; and Figure 4 shows a schematic representation of an engine having a turbocharger and an exhaust gas recirculation system.
Detailed description
Figure 1 shows an air intake module that is useful for understanding the disclosure. As can be seen from Figure 1, the air intake module may be located immediately downstream of the throttle of the engine.
The air intake module may comprise an air intake conduit 410, a pressure supply outlet 420, a boost control valve 430, and an exhaust gas recirculation (EGR) intake 440.
The air intake conduit 410 may define a passage for carrying charge air to the ccmbustion chamber of an engine 50, which may be an internal combustion engine. The air intake module may be used in the engine shown in Figure 4.
The engine 50 may be provided with a turbocharger 60 comprising a compressor 61 and a turbine 62. The turbocharger 60 may be provided with a boost limiting valve for allowing exhaust gas from the engine 50 to bypass the turbine 62 of the turbocharger 60. The pressure supply outlet 420 may provide a passage between the air intake conduit 410 and an actuator for actuating the boost limiting valve 65. The boost limiting valve 65 may therefore control the amount of exhaust gas bypassing the turbine 62.
A boost control valve 430 may be provided to control the flow of air through the pressure supply outlet 420. The boost control valve 430 may control the flow of air through the pressure supply outlet 420 by controlling the opening degree of an aperture 435 in the side of the intake conduit 410. The boost control valve 430 may be controlled by an engine management system.
The engine may be further provided with an exhaust gas recirculation (FGR) system 70. The EGR system 70 may be used to direct a portion of the gases exhausted by the engine 50 to the FGR intake 440 to mix with air from the compressor 61 in the air intake conduit 410.
The EGR intake 440 may be provided as an aperture in the side of the intake conduit 410.
As can be seen in Figure 1, the FGR intake 440 may be located very ciose to the aperture 435. It has been discovered that this arrangement may provide an air intake module with a compact construction, but can increase the risk of failure of the boost control valve 430. This is because the recirculated exhaust gas entering the intake conduit 410 may carry soot and/or other contaminants from the engine exhaust and will be at a high temperature following combustion in the engine cylinder 450. The heat of the recirculated exhaust gas and the deposition of contaminants oarried thereby have been found to potentially disrupt the correct operation of a boost control valve 430.
Figure 2 shows a first exemplary embodiment of the present disclosure, which may be used in the engine shown in Figure 4. The first embodiment of an air intake module comprises an air intake conduit 10, a pressure supply outlet 20, a boost control valve 30, and an FGR intake 40.
The air intake conduit 10 may define a passage 12 for carrying charge air to the ccmbustion chamber of an engine 50, which may be an internal combustion engine. The air intake module may be used in the engine shown in Figure 4.
As can be seen in Figure 2, a cavity 90 is provided within the air intake module. The cavity 90 may be proximate the passage 12 of the air intake conduit 10. The air intake module may comprise a unitary body in which both the air intake conduit 10 and cavity 90 are formed. The air intake module may be manufaotured by a method including a casting step, and the passage of the air intake conduit 10 and the cavity 90 may both be formed during that casting step. Optionally, additional machining may be provided following casting.
A feed line 36 may be provided between the cavity 90 and the passage 12. The feed line 36 may communicate with the passage 12 at a location upstream of the FOR intake 40.
The feed line 36 may be manufactured by a machining step following the casting step. The machining step may comprise drilling a bore between the cavity 90 and the passage 12. Alternatively, the machining step may comprise drilling a bore from the outer surface of the air intake module to the cavity 90 for connection with a pipe that may communicate with the passage 12.
The pressure supply outlet 20 may be arranged for connection with a pressure supply line 22 between the cavity and an actuator for actuating the boost limiting valve 65.
The boost control valve 30 may be provided to control the flow of air through the pressure supply outlet 20. The boost control valve 30 may ccntrol the flow of air through the pressure supply outlet 20 by controlling the opening degree of an aperture 35 in the wall of the cavity 90. The boost control valve 30 may be controlled by an engine management system.
The boost control valve 30 may be mounted on the air intake module by insertion within a bore drilled from the outer surfaoe of the unitary body of the air intake module to the cavity 90.
Figure 3 shows a second exemplary embodiment of the present disclosure, which may be used in the engine shown in Figure 4. The second embodiment of an air intake module may comprise a pressure supply unit 100 formed separately from the air intake conduit (not shown) The pressure supply unit 100 may comprise a cavity 190, which communicates with a pressure supply outlet 120 via an aperture 135 formed in the cavity 190. The pressure supply outlet 120 may be arranged for connection with a pressure supply line 22 between the cavity 190 and an actuator for actuating the boost limiting valve 65.
A feed line 136 may be provided in communication with the cavity 190. The feed line 136 may be arranged for connection with a feed pipe 138 leading to a passage of the air intake conduit.
A boost control valve 130 may be provided to control the flow of air through the pressure supply outlet 120. The boost control valve 130 may control the flow of air through the pressure supply outlet 120 by controlling the opening degree of the aperture 135. The boost control valve 130 may be controlled by an engine management system.
The pressure supply unit may comprise a single unitary body having the cavity 190, the pressure supply outlet 120, and the feed line 136. The unitary body also may also comprise a bracket 105. The bracket 105 may have a plurality of holes 106, which can aid in mounting the bracket on another article using bolts 108.
In some embodiments of the disclosure an intercooler may be provided downstream of the turbocharger 60 to cool the charge air compressed thereby. In such embodiments, the cavity 90, 190 may communicate with the passage 12 downstream of the intercooler in order to receive the air cooled thereby.
Industrial applicability
The inventor has discovered that the operation of boost control valves can be hindered in engines having contaminated or excessively warm intake air. For example, in engines utiiising exhaust gas recirculation, the recirculated exhaust gas may carry soot and/or other contaminants from the engine exhaust and may be at a high temperature following combustion in the engine cylinder.
The heat of the recirculated exhaust gas and the deposition of contaminants carried thereby have been found to disrupt the correct operation of a boost control valve. The air intake module, engine and method of the present disclosure provide a means for helping to prevent incorrect operation of the boost valve.

Claims (10)

  1. CLAIJYIS: ]. An air intake module for an engine, comprising: an air intake conduit defining a passage extending frcm an inlet to an outlet; a source of heated and/cr contaminated air; a cavity in communicaticn with the passage; and a boost control valve arranged to control a flow of gas between the cavity and a pressure supply outlet.
  2. 2. The air intake module of claim 1, wherein the source of heated and/or contaminated air is an FOR intake formed in the conduit for supplying recirculated exhaust gas into the passage. L5
  3. 3. The air intake module of claim 2, wherein the cavity communicates with the passage via a feed line that meets the passage between the inlet and the ECR intake.
  4. 4. The air intake module of any preceding claim, wherein the cavity and the air intake conduit form a single unitary body.
  5. 5. The air intake module of one of claims 1 to claim 3, further comprising a pressure supply unit formed separately from the air intake conduit, wherein the cavity is formed in the pressure supply unit and communicates with the passage via a feed line.
  6. 6. The air intake module of claim 5, wherein the pressure supply unit comprises a bracket for attachment to an engine.
    -10 -
  7. 7. An engine comprising: the air intake module of any preceding claim; an exhaust gas recirculation system forming the source of heated and/or contaminated air; and a turbocharger arranged to provide compressed air to the inlet of the air intake conduit, wherein: the turbocharger includes a boost limiting valve for controlling the flow of exhaust gas from the engine through a turbine of the turbocharger; and the boost limiting valve is actuated by an actuator in communication with the pressure supply outlet.
  8. 8. The engine further comprising an lnteroooler for cooling the compressed air provided by the turbocharger, wherein the cavity communicates with the passage downstream of the intercooler.
  9. 9. A method of manufacturing an air intake module for an engine, comprising the steps of: casting an intermediate to define a cavity and a passage extending from an inlet to an outlet; and machining the intermediate to form an air intake conduit.
  10. 10. The method of claim 9, further comprising the step of machining the intermediate to connect the cavity with the passage.
GB1215537.0A 2012-08-31 2012-08-31 Air intake module for an engine Withdrawn GB2505477A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1215537.0A GB2505477A (en) 2012-08-31 2012-08-31 Air intake module for an engine
GB1313337.6A GB2506260B (en) 2012-08-31 2013-07-26 Engine arrangement with a boost control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1215537.0A GB2505477A (en) 2012-08-31 2012-08-31 Air intake module for an engine

Publications (2)

Publication Number Publication Date
GB201215537D0 GB201215537D0 (en) 2012-10-17
GB2505477A true GB2505477A (en) 2014-03-05

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GB1215537.0A Withdrawn GB2505477A (en) 2012-08-31 2012-08-31 Air intake module for an engine
GB1313337.6A Expired - Fee Related GB2506260B (en) 2012-08-31 2013-07-26 Engine arrangement with a boost control unit

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1313337.6A Expired - Fee Related GB2506260B (en) 2012-08-31 2013-07-26 Engine arrangement with a boost control unit

Country Status (1)

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GB (2) GB2505477A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3028044A1 (en) * 2014-10-30 2016-05-06 Peugeot Citroen Automobiles Sa METHOD FOR VALIDATION OF A MOTOR OIL OR A COMPONENT OF A SUPERIOR THERMAL ENGINE

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035691A1 (en) * 1980-03-07 1981-09-16 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Charging pressure control device for internal-combustion engines
US4442672A (en) * 1980-06-14 1984-04-17 Bayerische Motoren Werke Ag Boost control device for internal combustion engines with exhaust gas turbocharger
GB2311556A (en) * 1996-03-28 1997-10-01 Cummins Engine Co Inc Turbocharger wastegate control system
US5924398A (en) * 1997-10-06 1999-07-20 Ford Global Technologies, Inc. Flow improvement vanes in the intake system of an internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035691A1 (en) * 1980-03-07 1981-09-16 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Charging pressure control device for internal-combustion engines
US4442672A (en) * 1980-06-14 1984-04-17 Bayerische Motoren Werke Ag Boost control device for internal combustion engines with exhaust gas turbocharger
GB2311556A (en) * 1996-03-28 1997-10-01 Cummins Engine Co Inc Turbocharger wastegate control system
US5924398A (en) * 1997-10-06 1999-07-20 Ford Global Technologies, Inc. Flow improvement vanes in the intake system of an internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3028044A1 (en) * 2014-10-30 2016-05-06 Peugeot Citroen Automobiles Sa METHOD FOR VALIDATION OF A MOTOR OIL OR A COMPONENT OF A SUPERIOR THERMAL ENGINE

Also Published As

Publication number Publication date
GB2506260B (en) 2014-09-24
GB2506260A (en) 2014-03-26
GB201215537D0 (en) 2012-10-17
GB201313337D0 (en) 2013-09-11

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)