WO1998025012A1 - Derivation chauffee de refroidisseur secondaire air-air a soupape de commutation a detection de charge - Google Patents

Derivation chauffee de refroidisseur secondaire air-air a soupape de commutation a detection de charge Download PDF

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Publication number
WO1998025012A1
WO1998025012A1 PCT/US1997/019728 US9719728W WO9825012A1 WO 1998025012 A1 WO1998025012 A1 WO 1998025012A1 US 9719728 W US9719728 W US 9719728W WO 9825012 A1 WO9825012 A1 WO 9825012A1
Authority
WO
WIPO (PCT)
Prior art keywords
aftercooler
engine
air
manifold pressure
heat exchanger
Prior art date
Application number
PCT/US1997/019728
Other languages
English (en)
Inventor
James C. Gilles
Andrew D. Rockwell
Original Assignee
Caterpillar Inc.
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 Caterpillar Inc. filed Critical Caterpillar Inc.
Priority to AU50052/97A priority Critical patent/AU5005297A/en
Publication of WO1998025012A1 publication Critical patent/WO1998025012A1/fr

Links

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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/042—Combustion air
    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F02B29/0418—Layout of the intake air cooling or coolant circuit the intake air cooler having a bypass or multiple flow paths within the heat exchanger to vary the effective heat transfer surface
    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F02B29/0425—Air cooled heat exchangers
    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0493—Controlling the air charge temperature
    • 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

Definitions

  • the invention relates to a turbocharger compression ignition engine with an after cooler and more particularly to such an engine that burns a low cetane fuel emulsion and has a heated aftercooler bypass with a load sensing switching valve.
  • a compression ignition engine that is started and run on low cetane fuel emulsion and has an aftercooler heated bypass which is utilized during startup and when operating at low loads to prevent misfiring and poor performance.
  • a compression ignition engine comprising a turbocharger, an air to air aftercooler and an intake air manifold disposed in series to supply compressed combustion air to the engine, when made in accordance with this invention, is characterized by a bypass heat exchanger, a modulating bypass valve adapted to respond to intake manifold pressure to control the amount of combustion air bypassing the aftercooler.
  • the method of operating a turbocharged, compression ignition engine with an air to air aftercooler on a low cetane fuel is characterized by providing a bypass heat exchanger, and providing a modulating bypass valve that responds to intake manifold pressure to pass all of the combustion air through the bypass heat exchanger, when the intake manifold pressure is below a low predetermined pressure.
  • the modulating bypass valve also responds to an increase in manifold pressure above the low predetermined manifold pressure to increase the flow of combustion air through the aftercooler and reduce the flow of combustion air through the bypass heat exchanger as the intake manifold pressure increases above the low predetermined pressure.
  • the modulating bypass valve also responds to pass all of the combustion air through the aftercooler, when the intake manifold exceeds a predetermined high intake manifold pressure. Whereby the engine performance is improved at light loads and high speed and at higher loads the fuel economy, performance and emissions are enhanced.
  • Fig. 1 is a schematic view of a compression ignition engine with an aftercooler and a heated aftercooler bypass controlled by a modulating bypass valve.
  • a water cooled, turbocharged, compression ignition or a diesel engine 1 comprising a intake manifold 3 for supplying combustion air to the engine 1, and an exhaust manifold 5.
  • a turbocharger 7 is disposed in fluid communication with the exhaust manifold 5 which supplies pressurized, heated exhaust gases to drive a turbine portion 9 of the turbocharger 7.
  • a compressor portion 11 which takes combustion air from the atmosphere and compresses it.
  • the compressed combustion air is directed from the compressor portion 11 of the turbocharger 7 through a conduit 13 to an air to air aftercooler 15, wherein the compressed combustion air is cooled by ambient air indicated by the arrows A. From the aftercooler 15 the combustion air is then directed via a conduit 17 to the intake manifold 3.
  • An air to air aftercooler bypass heat exchanger 19 is disposed in parallel with the aftercooler 15 to bypass combustion air around the aftercooler 15.
  • An adjustable, modulating bypass valve 21 is disposed in the conduit 17 and is connected to the bypass heat exchanger 19 by a conduit 23.
  • the bypass heat exchanger 19 is also disposed in fluid communication with the conduit 13 via a conduit 25.
  • the bypass heat exchanger 19 is also disposed in fluid communication with an engine cooling water system (not shown) , which supplies heated water to the bypass heat exchanger 19 through the inlet and outlet conduits 27 and 29, respectively.
  • the modulating bypass valve 21 is responsive to inlet manifold pressure, to show this schematically an inlet manifold pressure sensor 31 is shown connected to the modulating bypass valve 21 by a dotted line 33.
  • the modulating bypass valve 21 is adapted to respond to inlet manifold pressure to shut off the aftercooler 15 and pass all of the combustion air through the bypass heat exchanger 19, when the inlet manifold pressure is below a low predetermined pressure.
  • the adjustable modulating bypass valve 21 also adapted to responds to an increase in manifold pressure above the low predetermined manifold pressure to decrease the flow of combustion air from the bypass heat exchanger 19 and increase the flow of combustion air from the aftercooler 15 as the inlet manifold pressure increases above the low predetermined pressure.
  • the adjustable modulating bypass valve 21 is further adapted to respond to reaching and exceeding a high predetermined inlet manifold pressure by shutting off the bypass heat exchanger 19 and passing all of the combustion air through the aftercooler 15.
  • the adjustable modulating bypass valve 21 has an adjustment screw 35, which compresses a spring (not shown) within the valve to adjust a low predetermined pressure below, which the aftercooler 15 is shut off and all of the combustion air passes through the bypass heat exchanger 19.
  • a method of operating the water cooled, turbocharged, compression ignition or diesel engine 1 with the air to air aftercooler 5 on a low cetane fuel emulsions comprises providing the bypass heat exchanger 19 to heat combustion air that bypasses the aftercooler 15, providing the modulating bypass valve 21 that responds to intake manifold pressure to shut off the aftercooler 15 and pass all of the combustion air through the bypass heat exchanger 19 , when the intake manifold pressure is below a low predetermined pressure, which for a typical engine 1 is generally about 14.5 psia.
  • the modulating bypass valve 21 responds to an increase in manifold pressure above the low predetermined pressure to increase the flow of combustion air through the aftercooler 15 and reduce the flow of combustion air through the bypass heat exchanger 19 as the intake manifold pressure increases above the low predetermined intake manifold pressure.
  • the modulating bypass valve 21 responds to the intake manifold pressure reaching and exceeding a predetermined high intake manifold pressure to shut off the bypass heat exchanger 19 and pass all of the combustion air through the aftercooler 15.
  • the high predetermined inlet manifold pressure for a typical engine 1 is generally about 21 psia.
  • the engine 1 startup and light load high speed performance on low cetane fuel emulsions is improved and higher load fuel economy, performance and emissions are enhanced.
  • the adjustment screw 35 of the modulating bypass valve 21 is also adjustable to compress the spring in the modulating bypass valve to vary the low predetermined inlet manifold pressure to compensate for variations in an individual engine.
  • turbocharged compression ignition or diesel engine 1 herein before described advantageously overcomes the poor combustion and misfiring problems encountered by turbocharged compression ignition engines when run on low cetane fuel emulsions during startup and when operated at light loads and high speed by passing the combustion air through the bypass heat exchanger 19 and completely bypassing the aftercooler 15. As the load on the engine 1 increases the bypass valve 21 gradually switches to passing less and less combustion air through the heated bypass heat exchanger 19 and more and more combustion air through the aftercooler 15 promoting better fuel efficiency and performance, and lower emissions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Supercharger (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

L'invention concerne un moteur à allumage par compression refroidi par air (1), qui consomme peu de carburant au cétane et comprend un turbocompresseur (7), un refroidisseur secondaire air-air (15), un collecteur d'air aspiré (3) qui fournit au moteur (1) de l'air comburant, comprimé, un échangeur de chaleur à dérivation chauffée (19) qui utilise l'eau chauffée du moteur (1), cet échangeur étant monté en dérivation du refroidisseur secondaire (15), et une soupape de dérivation à modulation (21) conçue pour réagir à la pression du collecteur d'air aspiré et ainsi commander la quantité d'air comburant qui évite le refroidisseur secondaire (15). Cet air comburant est chauffé dans l'échangeur de chaleur à dérivation (19) afin d'éliminer les ratés d'allumage et les défauts de combustion au cours de la mise en service, lorsque le moteur fonctionne à faible charge et que l'on cherche à favoriser une consommation réduite de carburant, un meilleur rendement et une diminution des émissions, dès que la charge sur le moteur augmente.
PCT/US1997/019728 1996-12-02 1997-10-29 Derivation chauffee de refroidisseur secondaire air-air a soupape de commutation a detection de charge WO1998025012A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU50052/97A AU5005297A (en) 1996-12-02 1997-10-29 Air to air aftercooler heated bypass with load sensing switching valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US75887096A 1996-12-02 1996-12-02
US08/758,870 1996-12-02

Publications (1)

Publication Number Publication Date
WO1998025012A1 true WO1998025012A1 (fr) 1998-06-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/019728 WO1998025012A1 (fr) 1996-12-02 1997-10-29 Derivation chauffee de refroidisseur secondaire air-air a soupape de commutation a detection de charge

Country Status (2)

Country Link
AU (1) AU5005297A (fr)
WO (1) WO1998025012A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1520965A1 (fr) * 2003-10-02 2005-04-06 Ford Global Technologies, LLC, A subsidary of Ford Motor Company Procédé pour reduir l'étranglement d'un moteur à combustion interne et moteur avec étranglement reduit
WO2007125204A1 (fr) * 2006-04-26 2007-11-08 Valeo Systemes De Controle Moteur Dispositif d'admission d'air d'un moteur thermique ayant un circuit principal refroidi et un circuit derive pourvu de moyens de chauffage
WO2009115589A1 (fr) * 2008-03-20 2009-09-24 Aquafuel Research Limited Procédé et appareil de combustion
EP2264294A1 (fr) * 2009-05-29 2010-12-22 Deere & Company Dispositif de commande de la température d'un flux d'air de chargement passant à travers un dispositif de refroidissement d'air de chargement
US8056529B2 (en) * 2007-07-10 2011-11-15 Qamhiyeh Ziyad A Rotary internal combustion engine for combusting low cetane fuels
EP2592248A4 (fr) * 2010-07-07 2017-05-17 Xiangjin Zhou Moteur à essence à faible indice d'octane à allumage par compression

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2001128A (en) * 1977-07-12 1979-01-24 Alsacienne Constr Meca A supercharged diesel engine
GB2055963A (en) * 1979-08-06 1981-03-11 Alsacienne Constr Meca Supercharging Internal Combustion Engines
JPS59145325A (ja) * 1983-02-08 1984-08-20 Toyo Radiator Kk 車両、又は船舶の過給器用熱交換器のタンク構造
US4483150A (en) * 1983-02-28 1984-11-20 Societe Pour Le Developpement De La Suralimentation Hyperbar Supercharged internal combustion engines provided with a cooling system
US5269144A (en) * 1991-09-10 1993-12-14 Detroit Diesel Corporation Methanol fueled turbocharged diesel cycle internal combustion engine
EP0602348A1 (fr) * 1992-12-12 1994-06-22 MAN Nutzfahrzeuge Aktiengesellschaft Méthode de commande de la température de l'air de suralimentation et dispositif pour sa mise en oeuvre

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2001128A (en) * 1977-07-12 1979-01-24 Alsacienne Constr Meca A supercharged diesel engine
GB2055963A (en) * 1979-08-06 1981-03-11 Alsacienne Constr Meca Supercharging Internal Combustion Engines
JPS59145325A (ja) * 1983-02-08 1984-08-20 Toyo Radiator Kk 車両、又は船舶の過給器用熱交換器のタンク構造
US4483150A (en) * 1983-02-28 1984-11-20 Societe Pour Le Developpement De La Suralimentation Hyperbar Supercharged internal combustion engines provided with a cooling system
US5269144A (en) * 1991-09-10 1993-12-14 Detroit Diesel Corporation Methanol fueled turbocharged diesel cycle internal combustion engine
EP0602348A1 (fr) * 1992-12-12 1994-06-22 MAN Nutzfahrzeuge Aktiengesellschaft Méthode de commande de la température de l'air de suralimentation et dispositif pour sa mise en oeuvre

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1520965A1 (fr) * 2003-10-02 2005-04-06 Ford Global Technologies, LLC, A subsidary of Ford Motor Company Procédé pour reduir l'étranglement d'un moteur à combustion interne et moteur avec étranglement reduit
WO2007125204A1 (fr) * 2006-04-26 2007-11-08 Valeo Systemes De Controle Moteur Dispositif d'admission d'air d'un moteur thermique ayant un circuit principal refroidi et un circuit derive pourvu de moyens de chauffage
CN101432509B (zh) * 2006-04-26 2012-06-06 法雷奥电机控制系统公司 用于热机的进气装置的阀
US8074628B2 (en) 2006-04-26 2011-12-13 Valeo Systemes De Controle Moteur Air intake device for a heat engine with a cooled main circulation system and a bypass system equipped with a heating mechanism
US8056529B2 (en) * 2007-07-10 2011-11-15 Qamhiyeh Ziyad A Rotary internal combustion engine for combusting low cetane fuels
GB2460996A (en) * 2008-03-20 2009-12-23 Aquafuel Res Ltd Combustion method and apparatus
GB2460996B (en) * 2008-03-20 2010-08-25 Aquafuel Res Ltd Combustion method
WO2009115589A1 (fr) * 2008-03-20 2009-09-24 Aquafuel Research Limited Procédé et appareil de combustion
EA017673B1 (ru) * 2008-03-20 2013-02-28 Аквафьюел Рисерч Лимитед Способ сжигания и устройство для его осуществления
US8875685B2 (en) 2008-03-20 2014-11-04 Aquafuel Research Limited Combustion method and apparatus
EP2264294A1 (fr) * 2009-05-29 2010-12-22 Deere & Company Dispositif de commande de la température d'un flux d'air de chargement passant à travers un dispositif de refroidissement d'air de chargement
US8429911B2 (en) 2009-05-29 2013-04-30 Deere & Company Charge air temperature control system
EP2592248A4 (fr) * 2010-07-07 2017-05-17 Xiangjin Zhou Moteur à essence à faible indice d'octane à allumage par compression

Also Published As

Publication number Publication date
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