SE2100114A1 - Variable inlet trim system for a centrifugal compressor - Google Patents

Variable inlet trim system for a centrifugal compressor

Info

Publication number
SE2100114A1
SE2100114A1 SE2100114A SE2100114A SE2100114A1 SE 2100114 A1 SE2100114 A1 SE 2100114A1 SE 2100114 A SE2100114 A SE 2100114A SE 2100114 A SE2100114 A SE 2100114A SE 2100114 A1 SE2100114 A1 SE 2100114A1
Authority
SE
Sweden
Prior art keywords
compressor
wheel
compressor wheel
inlet
conical
Prior art date
Application number
SE2100114A
Inventor
Hans Drangel
Original Assignee
Hans Drangel
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 Hans Drangel filed Critical Hans Drangel
Priority to SE2100114A priority Critical patent/SE2100114A1/en
Publication of SE2100114A1 publication Critical patent/SE2100114A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
    • F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
    • F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
    • F04D29/464—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps adjusting flow cross-section, otherwise than by using adjustable stator blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0253—Surge control by throttling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Inorganic Insulating Materials (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

A turbocharger with a centrifugal compressor (3) comprising a variable inlet adjusting mechanism (4) positioned between the air inlet (23) and the inducer (18) of the compressor wheel (11). The compressor inlet adjusting mechanism (4) comprises a plurality of conical segments (15) forming a frusto-conical shape when the compressor inlet adjusting mechanism (4) is in closed position. The frusto-conical downstream inner diameter where air exits into the inducer (18) of the compressor wheel (11) is smaller than the inducer (18) of the compressor wheel (11) thereby increasing air velocity hence increasing compressor surge margin. When the compressor inlet adjusting mechanism (4) is in open position an actuation cone (14) moves towards the compressor wheel (11) thereby moving the conical segments (15) radially out from the air flow path. The air flow is then guided by the inner shape of the actuation cone (14) with a diameter like the compressor inducer (18) diameter presenting an unrestricted flow to the compressor wheel.

Description

Background of the invention The invention relates to a Compressor of centrifugal type commonly used in turbochargers aimed for combustion engines where the inlet area to the compressor wheel can be selectively reduced depending on air flow requested due to the combustion engines operation mode.
Turbocharger is a well-known charging device with a compressor wheel and a turbine wheel mounted to a common shaft. The compressor is driven by the turbine wheel through the common shaft when exhaust gas from the combustion engine passes through the turbine wheel and expands thereby transforming exhaust enthalpy to mechanical shaft power. The intake air is directed in a general axial direction to the inducer (inlet) part of the compressor wheel, the compressed air exits the compressor wheel generally radial out from the centre of the compressor wheel largest diameter (exducer) into the diffuser followed by a volute in the compressor housing where the compressed air is collected, from the volute outlet the compressed air is directed to the combustion engine. The compressed air entering the combustion engine enables increased engine performance The centrifugal compressor design parameters such as compressor wheel design, compressor housing design parameters (inducer, diffuser and volute) defines the performance Characteristics of the compressor commonly known as pressure ratio (outlet pressure divided with inlet pressure) and air mass flow. These parameters are usually presented in a graph (compressor map) displaying pressure ratio on the y-axis and mass flow on the x-axis for a selected number of compressor wheel speeds.
The limitations of the compressor for each of the plotted wheel speeds are the maximum mass flow rate maintained at a given pressure ratio and if mass flow is further increased the pressure ratio can no longer be maintained. This condition is commonly called compressor choke. At low flow rates the compressor limit is called surge which occurs when the pressure ratio cannot be increased more without increasing the flow rate. The flow begins to stall at the compressor blades and pressure fluctuations occur which also may create noise. A reduction of the inlet area just in front of the compressor inducer part increases the flow velocity into the compressor wheel which has a positive impact on the surge as well as compressor efficiency at low flow rates. At large flow rates the inlet area at the compressor inducer should be unrestricted, hence the desire to have a mechanism that can selectively reduce the area in front of the compressor wheel.
Brief summary of the disclosure The present disclosure describes a method and mechanism for a centrifugal compressor that can shift the operation range on demand. The surge line can be moved towards lower flow rate for a given pressure ratio with maintained choke line at high flow conditions.
One embodiment described herein comprises a turbocharger with following features: A turbine wheel mounted in a turbine housing that receives exhaust gases from a combustion engine. The turbine wheel is connected to a rotational shaft. A Compressor wheel mounted in a com pressor housing. The compressor wheel is connected to the same rotational shaft as the turbine wheel. A compressor hosing inlet defining an axial inlet passage leading to the inlet (inducer) part of the compressor wheel. The compressor housing having a diffuser and volute part that receives the compressed air that is discharged radially from the outlet part of the compressor wheel.
The air inlet having an adjusting mechanism positioned between the air inlet part of the compressor housing and the inducer part of the compressor wheel. The compressor inlet adjusting mechanism is moveable between an open and closed position. The inlet adjustment mechanism comprising a Variable geometry conical mechanism comprising a conical sliding part (actuation cone) movable in axial direction and plurality of conical segments that moves radially coupled to the axial movement of the actuation cone. The inlet adjusting mechanism is positioned just in front of the inducer part of the compressor wheel and the slightly larger compressor housing contour adapted to the compressor wheel outer contour.
The conical segments are movable in a general radial direction away from the compressor inlet. The radial movement of the conical segments is activated by the axial movement of the actuation cone. The compressor inlet adjusting mechanism is movable between fully open and fully closed position. Fully open position is reached when the actuation cone is in the position closest to the compressor wheel.
The inner surface of the actuation cone transforms from a general larger diameter at the air entry to a diameter generally equal to the compressor wheel inducer diameter, meaning that when the actuation cone is in open position closest to the compressor wheel it forms an unrestricted passage for the inlet air to the compressor.
When the actuation cone is in the closed position furthest away from the compressor wheel, the conical segments move radially inward towards the centre of the air inlet channel and forms an additional cone with smaller air outlet diameter than the compressor wheels inducer diameter. An ideal smooth cone shape can be created from the air inlet of the compressor housing to the air entering just in front of the compressor wheel inlet (inducer). The diameter of the channel formed by the conical segments being smaller than the compressor inducer diameter at the air outlet just in front of the compressor inducer.
To avoid creating an opening in the compressor inlet duct when the inlet adjusting mechanism is in open position, the actuation cone outer ring extension connects to the actuation cone via multiple arms attached at the outside downstream part of the actuation cone directed generally radially out from the compressor centreline whereafter the shape of the arms are routed upstream of the Compressor passing through openings in the inlet duct, thereafter routed along the outside of the inlet duct and forming a free length outside of the inlet duct together with the outer extension ring similar or larger than the actuation cone total movement between fully open and fully closed position. At the end of the arms and the attached outer ring extension a linear actuator can be connected, such linear actuator can be of pneumatic, hydraulic, or electric type. The multiple arms being positioned in the same plane as the plane where the conical segments meet in closed position allowing the multiple arms to pass through the openings created when the conical segments move radially out from the centre of the compressor.
Brief description of views and drawings Fig. 1 is a cross section of the turbocharger indicating the four main systems of the turbocharger: turbine assembly, bearing housing assembly, compressor assembly and compressor inlet adjusting mechanism assembly Fig. 2 is a cross section of the turbocharger with the compressor inlet adjusting mechanism in open position.
Fig. 3 is a cross section of the turbocharger with the compressor inlet adjusting mechanism in closed position.
Fig. 4 is a section view with the compressor inlet adjusting mechanism in closed position Fig. 5 is a section view with the compressor inlet adjusting mechanism in closed position Fig. 6 is a front view of the inlet adjusting mechanism in open position looking from the compressor wheel and indicating section views position Fig. 7 is perspective view of the compressor inlet adjusting mechanism in open position looking from the air inlet position Fig. 8 is perspective view of the compressor inlet adjusting mechanism in open position looking from a generally downstream of air flow direction.
Fig. 9 is perspective view of the compressor inlet adjusting mechanism in closed position looking from the air inlet position Fig. 10 is perspective view of the com pressor inlet adjusting mechanism in closed position looking from a generally downstream of air flow direction.
Fig. 11 is perspective view of the actuation cone and cone outer ring extension looking from a generally downstream of air flow direction.
Detailed description of views and drawings The invention will be presented in detail with references to views and drawings. Like numbers refers to like elements throughout.
A turbocharger in accordance with the embodiment of the invention is illustrated in the drawings (Fig.1 to Fig. 11).
The turbocharger comprises a turbine assembly (1), a bearing housing assembiy (2), a Compressor assembly (3) and a Compressor inlet adjusting mechanism assembly (4).
The turbine assembly comprises a turbine housing (5) and a turbine wheel (6) positioned within the turbine housing and mounted to a rotational shaft (7).
The bearing housing assembly comprises bearing housing (8) where radial bearings (9) and axial bearing (10) are mounted.
The compressor assembly (3) comprises a compressor housing (12) and a compressor wheel (11) positioned within the compressor housing and connected to the same shaft (8) as the turbine wheel (7).
Further the compressor system comprises a compressor assembly (3) and the compressor inlet adjusting mechanism (4) comprising inlet duct (13), actuation cone (14) and four conical segments (15) each mounted to a correspondent guide pin (16) and each spring loaded through a correspondent spring (17).
The exhaust gas from the combustion engine (not shown) enters the turbine housing inlet (18) in a generally radial direction and passes through the turbine wheel (6) where the exhaust gas expands and exits the turbine wheel (6) in a general axial direction thereby generating a rotational movement of the turbine wheel (6) and shaft (7).
The rotational and axial movement of the shaft (7) is controlled by the radial and axial bearings (9, 10) in the bearing housing (8).
The rotational movement of the turbine wheel (6) is transferred to the com pressor wheel (11) mounted to the same shaft (7) as the turbine wheel (6).
The air enters the air inlet duct (13) and is routed downstream to the compressor wheel (11) via the inside of the actuation cone (14) and the inside of the conical segments (15) when the compressor inlet adjusting mechanism (4) is in closed position.
When the compressor inlet adjusting mechanism (4) is in open position, the air enters the air inlet duct (13) and is then routed downstream to the compressor wheel (11) via the inside of the actuation cone (14). The conical segments (15) are in this case moved away radially and does not take part in the air delivery to the compressor wheel (11).
The Compressor wheel (11) is positioned in the compressor housing (12). The compressor housing (12) follows the compressor wheel (11) outer contour from the generally axial direction of the air inlet to the compressor wheel (11) referred to as the inducer part (18) of the compressor wheel (11) to the generally radial outlet part of the compressor wheel (11) referred to as the exducer part (19) of the compressor wheel (11).
The compressor housing contour around the compressor wheel (11) has a slightly larger dimension than the compressor wheel (11) to allowing the compressor wheel (11) to rotate freely within the compressor housing (12) without creating unnecessary air leakage between compressor wheel (11) and compressor housing (12).
The compressed air discharged radially from the compressor wheel exducer (19) enters the diffuser part (20) of the compressor housing ( 12) and is then routed to the volute part (21) of the compressor housing. From the compressor volute outlet (not shown) the air is routed to the combustion engine (not shown) The compressed air entering the combustion engine will enable increased performance of the combustion engine. ln accordance with the invention the turbocharger compressor system (3, 4) has a compressor inlet adjusting mechanism (4) positioned upstream of the compressor wheel (11).
The compressor inlet adjusting mechanism (4) is moveable between an open position (Figl, 2, 6, 7, 8) and a closed position (Fig 3, 4, 5, 9, 10) The compressor inlet adjusting (4) mechanism comprises a variable geometry conical mechanism enabling the inlet diameter at the compressor wheel inducer (18) to be varied between a diameter like the compressor housing contour at the compressor wheel inducer (18) when the mechanism is in fully open position to a diameter smaller than the compressor wheel inducer (18) diameter at the air outlet from the inside of the conical segments (15) when the inlet adjusting mechanism is in closed position. The conical segments (15) collectively present a frusto-conical shape when the inlet adjusting mechanism (4) is in fully closed position. The conical segments (15) are positioned at a small distance upstream of the compressor wheel (11) allowing the compressor wheel (11) to rotate freely. The closer the reduced outlet diameter of the frusto-conical shape formed by the conical segments (15) in closed position is positioned to the inducer (18) of the compressor wheel (11) the more positive impact on the surge margin is achieved. The reduced outlet diameter of the conical segments (15) in closed position, hence reduced in-flow diameter to the compressor wheel (11) increases the flow velocity to the compressor wheel (11) thereby stabilizing the flow and helps avoiding blade stall, hence increasing margin to surge.
By moving the actuation cone (14) in axial direction towards the compressor wheel (11) the conical segments (15) movement will be activated by the outer surface (22) of the actuation cone (14). The conical segments (15) will then be moved in radial direction outward from the compressor wheel (11) centreline.
The direction of the radial movement of the conical segments (15) is controlled by the guide pins (16). The springs (17) keeps the conical segments in contact with the outer surface (22) of the actuation cone (14) independent of the actuation cone (14) position.
When the inlet adjusting mechanism (4) is in fully open position and fully closed position the air passage from the Compressor inlet (23) to compressor wheel (11) forms a passage with a smooth conical shape with different length and different diameter at the compressor wheel inducer (18).
The linear movement of the actuation cone (14) is activated by a linear actuator (not shown), connected to the actuation cone (14) outer ring extension (24).
To avoid creating an opening in the compressor inlet duct (13) when the inlet adjusting mechanism (4) is in open position, the actuation cone (14) outer ring extension (24) connects to the actuation cone (14) via multiple arms (25) attached at the outside downstream part of the actuation cone (14) directed generally radially out from the compressor centreline whereafter the shape of the arms are routed upstream of the compressor (3), passing through openings in the inlet duct (27) where sealings are present (not shown), thereafter routed along the outside of the inlet duct (13) and forming a free length outside of the inlet duct together with the outer extension ring (24) similar or larger than the actuation cone (14) total movement between fully open and fully closed position. At the end of the arms and outer ring extension (26) a linear actuator is connected (not shown), such linear actuator can be of pneumatic, hydraulic, or electric type. The multiple arms (25) being positioned in the same plane as the plane where the conical segments (14) meet in closed position allowing the multiple arms (25) to pass through the openings created when the conical segments (15) move radially out from the centre of the compressor (3).
Many variations and other embodiments of the inventions set forth herein will come to mind to one skilled in the art to which these inventions are developed. For example, while the inlet-adjustment mechanism of the present disclosure is described as a variable- geometry conical mechanism, it will be understood that the term "conical" merely connotes a generally tapering structure that becomes smaller in diameter along the flow direction approaching the compressor wheel (11). There is no strict requirement that the structure be purely or even generally conical. Therefore, it is to be understood that the inventions are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims.

Claims (3)

  1. What is claimed is: 1. A turbocharger, comprising: a turbine housing (5) receiving exhaust gas from a combustion engine, the exhaust gas supplied to a turbine wheel (6) through the turbine housing (5), the turbine wheel (6) is attached to a rotational shaft (7) held in position by bearings (9, 10) in a bearing housing (8): a centrifugal Compressor system (3, 4) comprising a compressor housing (12) and a compressor wheel (11) positioned in the compressor housing (12) and attached to the same shaft (7) as the turbine wheel (6), the compressor wheel (11) defined by an inducer part (18) where air enters generally axial to the inducer part (18) of the compressor wheel (11), the compressed air being discharged in a generally radial direction away from the centre axis of the compressor wheel (11), the air inlet defined by the inner surface of the compressor inlet duct (13) where air enters followed by a compressor inlet adjustment mechanism (4) positioned between the air inlet (23) and the shroud surface adjacent to the outer tips of the compressor wheel blades; the compressor inlet adjustment mechanism (4) comprising a Variable geometry conical mechanism comprising a plurality of conical segments (15) that in closed position collectively form a frusto-conical shape with a downstream inner diameter smaller than the shroud surface of the compressor housing at the inducer part (18) of the compressor wheel (11) in open position an actuation cone (14) is moved axially towards the compressor wheel (11) resulting in that the conical segments (15) are radially moved out from the compressor wheel centre by the outer surface (22) of the actuation cone (14) and guided radially by the guide pins (17), when fully open position is obtained the conical segments (15) are not part of the air flow path, instead the air path is guided by the inner surface of the actuation cone (14) with a downstream diameter similar to the shroud surface of the compressor housing (12) at the compressor wheel inducer (18) allowing unrestricted airflow to the compressor (3)
  2. 2. The turbocharger of claim 1 where the actuation cone being equipped with multiple arms (25) attached at the outside downstream part directed generally radially out from the compressor (3) centreline whereafter the shape of the arms (25) are routed upstream of the compressor (3), passing through openings (27) in the inlet duct (13) where sealings are present, thereafter routed along the outside of the inlet duct (13) and having a free length outside of the inlet duct together with the outer extension ring (24) similar or larger than the actuation cone (14) total movement between fully open and fully closed position, at the end of the free length an actuator is connected, further the arms (25) being positioned in the same plane as the plane where the conical segments (15) meet in closed position allowing the arms (25) to pass through the gap created when the conical segments moves radially out from the centre of the compressor
  3. 3. The turbocharger of claim 1 wherein the guide pins (17) are substituted by slots in the conical segments that interface to the compressor housing with protrusions at the compressor housing face hereby function as radially guide for the conical segments
SE2100114A 2021-07-12 2021-07-12 Variable inlet trim system for a centrifugal compressor SE2100114A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE2100114A SE2100114A1 (en) 2021-07-12 2021-07-12 Variable inlet trim system for a centrifugal compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2100114A SE2100114A1 (en) 2021-07-12 2021-07-12 Variable inlet trim system for a centrifugal compressor

Publications (1)

Publication Number Publication Date
SE2100114A1 true SE2100114A1 (en) 2023-01-13

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Family Applications (1)

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SE2100114A SE2100114A1 (en) 2021-07-12 2021-07-12 Variable inlet trim system for a centrifugal compressor

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044564A1 (en) * 1980-07-22 1982-01-27 Nissan Motor Co., Ltd. Turbo compressor having a surge suppressing arrangement
EP1947299A2 (en) * 2007-01-18 2008-07-23 Jegel, Franz Peter, Ing. Exhaust gas turbocharger for a combustion engine
DE102010026176A1 (en) * 2010-07-06 2012-01-12 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Device for stabilizing characteristic diagram of radial compressor of petrol engine, has moving element arranged in entry region of compressor to adjustably cover portion of front side outflow surface at external periphery of running wheel
DE102014006463A1 (en) * 2014-05-06 2015-11-12 Mann + Hummel Gmbh Adjustable air supply device
EP3018356A1 (en) * 2014-11-10 2016-05-11 Honeywell International Inc. Adjustable-trim centrifugal compressor with ported shroud, and turbocharger having same
EP3023644A1 (en) * 2014-11-24 2016-05-25 Honeywell International Inc. Adjustable-trim centrifugal compressor, and turbocharger having same
EP3054123A1 (en) * 2015-02-06 2016-08-10 Honeywell International Inc. Passive and semi-passive inlet-adjustment mechanisms for compressor, and turbocharger having same
US20160265424A1 (en) * 2015-03-10 2016-09-15 Honeywell International Inc. Adjustable-trim centrifugal compressor, and turbocharger having same
WO2018045153A1 (en) * 2016-09-02 2018-03-08 Borgwarner Inc. Turbocharger having variable compressor trim
US20190264603A1 (en) * 2016-09-14 2019-08-29 Cpt Group Gmbh Turbocharger For An Internal Combustion Engine
DE102018115839A1 (en) * 2018-06-29 2020-01-02 Ihi Charging Systems International Gmbh Air duct section for an exhaust gas turbocharger and exhaust gas turbocharger
CN111927818A (en) * 2020-09-27 2020-11-13 宁波丰沃涡轮增压系统有限公司 Air inlet adjusting mechanism and turbocharger compressor using same

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044564A1 (en) * 1980-07-22 1982-01-27 Nissan Motor Co., Ltd. Turbo compressor having a surge suppressing arrangement
EP1947299A2 (en) * 2007-01-18 2008-07-23 Jegel, Franz Peter, Ing. Exhaust gas turbocharger for a combustion engine
DE102010026176A1 (en) * 2010-07-06 2012-01-12 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Device for stabilizing characteristic diagram of radial compressor of petrol engine, has moving element arranged in entry region of compressor to adjustably cover portion of front side outflow surface at external periphery of running wheel
DE102014006463A1 (en) * 2014-05-06 2015-11-12 Mann + Hummel Gmbh Adjustable air supply device
EP3018356A1 (en) * 2014-11-10 2016-05-11 Honeywell International Inc. Adjustable-trim centrifugal compressor with ported shroud, and turbocharger having same
EP3023644A1 (en) * 2014-11-24 2016-05-25 Honeywell International Inc. Adjustable-trim centrifugal compressor, and turbocharger having same
EP3054123A1 (en) * 2015-02-06 2016-08-10 Honeywell International Inc. Passive and semi-passive inlet-adjustment mechanisms for compressor, and turbocharger having same
US20160265424A1 (en) * 2015-03-10 2016-09-15 Honeywell International Inc. Adjustable-trim centrifugal compressor, and turbocharger having same
WO2018045153A1 (en) * 2016-09-02 2018-03-08 Borgwarner Inc. Turbocharger having variable compressor trim
US20190264603A1 (en) * 2016-09-14 2019-08-29 Cpt Group Gmbh Turbocharger For An Internal Combustion Engine
DE102018115839A1 (en) * 2018-06-29 2020-01-02 Ihi Charging Systems International Gmbh Air duct section for an exhaust gas turbocharger and exhaust gas turbocharger
CN111927818A (en) * 2020-09-27 2020-11-13 宁波丰沃涡轮增压系统有限公司 Air inlet adjusting mechanism and turbocharger compressor using same

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