US3774399A - Recirculation type exhaust gas cleaning system - Google Patents

Recirculation type exhaust gas cleaning system Download PDF

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Publication number
US3774399A
US3774399A US00282662A US3774399DA US3774399A US 3774399 A US3774399 A US 3774399A US 00282662 A US00282662 A US 00282662A US 3774399D A US3774399D A US 3774399DA US 3774399 A US3774399 A US 3774399A
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US
United States
Prior art keywords
exhaust gas
air
cleaning system
turbine
exhaust
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.)
Expired - Lifetime
Application number
US00282662A
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English (en)
Inventor
H Nohira
H Nishimura
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Denso Corp
Original Assignee
NipponDenso Co Ltd
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Filing date
Publication date
Application filed by NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
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Publication of US3774399A publication Critical patent/US3774399A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
    • F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
    • F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
    • 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
    • F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
    • 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
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/0283—Throttle in the form of an expander

Definitions

  • exhaust gas can be decreased- 5 Claims, 1 Drawing Figure RECIRCULATION TYPE EXHAUST GAS CLEANING SYSTEM BACKGROUND OF THE INVENTION
  • the present invention relates to a recirculation type engine exhaust gas cleaning system and more particularly to such an engine exhaust gas cleaning system comprising a blower driven by an output air of an air pump for recirculating a portion of exhaust gas from an exhaust pipe into air intake system, such as an air cleaner or a carburetor of an engine so as to reduce the maximum temperature in the engine combustion chamber to minimize the nitrogen oxide content in the exhaust gas.
  • Conventional recirculation type exhaust gas cleaning system of this kind comprises an exhaust gas cooler through which the recirculation flow of the exhaust gas is passed before it is introduced into the engine intake system.
  • the cooler is often clogged by powders of copper and carbon in the exhaust gas or corroded by water or sulfuric acid contained in the exhaust gas.
  • it is usually required to provide a filter which adversely increases the flow resistance in'the cleaning system.
  • a filter When such a filter is provided, it is necessary to feed the recirculation flow of the exhaust gas under pressure in order to overcome the flow resistance of the filter and, if a motor-driven blower is used for this purpose, a high-speed motor of about 40,000 rpm. must be used for attaining a necessary pressure rise. Therefore, the system requires an increased cost.
  • the present invention eliminates the above disadvantages of prior art by providing a turbine driven by an output air of an air injection pump for driving an exhaust gas recirculation blower,
  • the blower can be driven at a high speed by said turbine so as to recirculate a portion of exhaust gas from the exhaust pipe into the air intake system of the engine.
  • the turbine is driven at a high speed by the output air of the air injection pump and, at the same time, foreign particles, water and sulfuric acid are removed by a filter provided in the exhaust gas.
  • a portion of the exhaust gas which has passed through the filter is then recirculated into the engine air intake system, such as an air cleaner or a carburetor by means of a blower connected to the output shaft of said turbine.
  • the reference numeral I designates an air cleaner for an automobile engine, 2 a carburetor, 3 an air intake manifold, 4 an intake valve, 5 a cylinder, 6 an exhaust valve, 7 an exhaust manifold and San exhaust pipe, and there is provided a filter 9 in the exhaust pipe 8.
  • the reference numeral I0 designates an air injection pump having an air intake passage 10a connected to the air cleaner 1 and an outlet passage l0b connected to the air intake passage Ila of a turbine 11.
  • the turbine 11 is in turn connected by its outlet passage 11b to an air distribution manifold 12.
  • the manifold 12 is further connected to an air injection pipe 13 projecting into the exhaust manifold 7.
  • the reference numeral 14 designates a blower driven by the turbine 11, and 15 a rotatable shaft connecting the turbine 11 with the blower 14.
  • the blower 14 has an exhaust gas inlet passage 14a connected to the exhaust pipe 8'at the downstream side of the filter 9 and an exhaust gas outlet passage 14b connected through a valve 16 to the air cleaner 1.
  • the filter 9 may comprise, for example, a cyclone separator 9a for separating relatively raw particles and a filtering layer 9b made of steel wool or the like.
  • the system of the present invention constituted as described above operates as follows.
  • the air pump 10 which is driven by an engine crankshaft through a belt drive device serves to feed cleaned air from the air cleaner 1 into the inlet passage 11a of the turbine 11.
  • the turbine 11 is operated at a high speed by the air.
  • the air which has passed through the turbine 11 is introduced into the air distribution manifold 12 and then into the injection pipe 13.
  • cleaned air is injected into the exhaust gas manifold 7 at a portion adjacent to the exhaust valve 6, whereby recombustion of the exhaust gas takes place reducing harmful combustion products.
  • the exhaust gas is further introduced through the exhaust manifold 7 and the exhaust pipe 8 into the filter 9 where particles of copper, carbon and the like are removed from the exhaust gas.
  • the exhaust gas is cooled so as to reduce the content of water, sulfuric acid and the like in the exhaust gas.
  • a portion of the exhaust gas cleaned by the filter 9 as described above is then drawn by .the blower 14 which is connected to the turbine 11, and pressurized to a desired value, for example about 50 mmHg, to be introduced into the air cleaner 1. Then, the portion of the exhaust gas is mixed with the mixture in the carburetor 2 and introduced into the cylinder 5 of the engine. The recirculated portion of the exhaust gas is efi'ective to reduce the maximum temperature in the cylinder 5 preventing nitrogen oxide from being produced.
  • the valve 16 serves to control the flow of the recirculation gas in accordance with the speed of theautomobile or the temperature of the engine.
  • valve 16 may be opened at the vehicle speed of km/H or below and the temperature of the cooling medium of the engine is between 65 and C.
  • the control is performed for the purpose of reducing the nitrogen oxide content in the exhaust gas without producing any adverse effect on the operation of the engine.
  • the portion of the exhaust gas recirculated by the blower 14 should not necessarily be introduced into the air cleaner 1 but may be into the carburetor 2 at the upstream side of throttle valve.
  • the outlet passage a may be divided into two passages, one being connected to the air distribution manifold 12 as shown by a dotted line in the drawing, and the other being connected to the inlet passage 11a of the turbine 11 with the air outlet passage llb of the turbine 1] opened to the atmosphere as shown by a dotted line.
  • the filter 9 provided in the exhaust pipe 8 and sufficiently cooled portion of the exhaust gas is recirculated into the air cleaner 1 or the carburetor 2 of the engine intake system by a blower 14 operated by a turbine which is in turn driven by an output air of the air pump 10. Therefore, the mechanical components such as the carburetor 2, the blower 14 and the valve 16 can be free from clogging or corrosion by water content or sulfuric acid, so that the life of the mechanical components can be remarkably increased.
  • the arrangement in which the blower 14 is driven by a high speed turbine which is operated by an output air from an air pump 10 is effective to provide a desired exhaust gas cleaning system at a reduced manufacturing cost.
  • a recirculation type exhaust gas cleaning system for an internal combustion engine having intake and exhaust pipes comprising,
  • an air cleaner connected with said intake pipe for cleaning the air to be supplied to said intake pipe, an air pump connected with said air cleaner for sup plying the air to the exhaust pipe by compressing the air to be supplied from said air cleaner,
  • a turbine having an output shaft disposed to be driven by the compressed air of said air pump
  • filter means provided in said exhaust pipe for removing foreign particles in the exhaust gas after the air from said air pump has been supplied, and a conduit means for recirculating a portion of the exhaust gas, which has passed through said filter means into the intake pipe of the engine by said i blower.
  • An exhaust gas cleaning system in accordance with claim 1 further comprising,
  • a carburetor provided between said air cleaner and said intake pipe and communicated to said conduit means, thereby the air and the recirculated exhaust gas are supplied to the intake pipe through said carburetor.

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)
  • Exhaust Gas After Treatment (AREA)
US00282662A 1971-08-23 1972-08-22 Recirculation type exhaust gas cleaning system Expired - Lifetime US3774399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46064294A JPS517262B2 (fr) 1971-08-23 1971-08-23

Publications (1)

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US3774399A true US3774399A (en) 1973-11-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00282662A Expired - Lifetime US3774399A (en) 1971-08-23 1972-08-22 Recirculation type exhaust gas cleaning system

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US (1) US3774399A (fr)
JP (1) JPS517262B2 (fr)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906724A (en) * 1973-12-03 1975-09-23 Toyota Motor Co Ltd Air cleaner assembly for an internal combustion engine having an exhaust gas purification system
US3990419A (en) * 1974-05-20 1976-11-09 Toyota Jidosha Kogyo Kabushiki Kaisha Air cleaner for use with an internal combustion engine
US5357936A (en) * 1991-09-26 1994-10-25 Mazda Motor Corporation Engine of a spark ignition type
US6526753B1 (en) 2001-12-17 2003-03-04 Caterpillar Inc Exhaust gas regenerator/particulate trap for an internal combustion engine
US6647970B2 (en) 2001-07-09 2003-11-18 Clarence L. Hankins Exhaust gas recirculation and processing device for turbocharged diesel engine
US6675782B1 (en) * 1999-03-09 2004-01-13 Volvo Lastvagnar Ab International combustion engine with exhaust recirculation
US20060096279A1 (en) * 2002-09-18 2006-05-11 Daimlerchrysler Ag Internal combustion engine comprising a gas conveying system and operating method therefor
US7178492B2 (en) 2002-05-14 2007-02-20 Caterpillar Inc Air and fuel supply system for combustion engine
US7191743B2 (en) 2002-05-14 2007-03-20 Caterpillar Inc Air and fuel supply system for a combustion engine
US7201121B2 (en) 2002-02-04 2007-04-10 Caterpillar Inc Combustion engine including fluidically-driven engine valve actuator
US7204213B2 (en) 2002-05-14 2007-04-17 Caterpillar Inc Air and fuel supply system for combustion engine
US7222614B2 (en) 1996-07-17 2007-05-29 Bryant Clyde C Internal combustion engine and working cycle
US7252054B2 (en) 2002-05-14 2007-08-07 Caterpillar Inc Combustion engine including cam phase-shifting
US7281527B1 (en) 1996-07-17 2007-10-16 Bryant Clyde C Internal combustion engine and working cycle
US20080283098A1 (en) * 2007-05-17 2008-11-20 Chevron Japan Ltd. Method for cleaning internal parts of gasoline engines
WO2010073240A1 (fr) * 2008-12-28 2010-07-01 Clean Marine Procédés et dispositif de production d'énergie peu polluante
US8215292B2 (en) 1996-07-17 2012-07-10 Bryant Clyde C Internal combustion engine and working cycle
US20150231558A1 (en) * 2012-09-25 2015-08-20 Alfa Laval Corporate Ab Combined cleaning system and method for reduction of sox and nox in exhaust gases from a combustion engine
US20190186388A1 (en) * 2017-12-20 2019-06-20 Man Energy Solutions Se Exhaust Gas Recirculation Blower And Internal Combustion Engine
US11346309B2 (en) * 2018-08-23 2022-05-31 Volvo Truck Corporation Method for operating an internal combustion engine system
US11391249B2 (en) * 2020-10-14 2022-07-19 Fca Us Llc Engine secondary air and EGR system and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5570301U (fr) * 1978-11-09 1980-05-15
JPS585801B2 (ja) * 1979-06-16 1983-02-01 株式会社ブリヂストン 低空気圧タイヤ用ホイ−ル

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417562A (en) * 1966-10-26 1968-12-24 Charles W. Morris Self-lubricating air sealed bearing apparatus
US3559402A (en) * 1969-04-24 1971-02-02 Us Navy Closed cycle diesel engine
US3570240A (en) * 1968-05-29 1971-03-16 France Armed Forces Supercharging apparatus for diesel and multifuel engines
US3672340A (en) * 1970-05-18 1972-06-27 Georg A Bomba Exhaust feedback and control system for internal combustion engines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417562A (en) * 1966-10-26 1968-12-24 Charles W. Morris Self-lubricating air sealed bearing apparatus
US3570240A (en) * 1968-05-29 1971-03-16 France Armed Forces Supercharging apparatus for diesel and multifuel engines
US3559402A (en) * 1969-04-24 1971-02-02 Us Navy Closed cycle diesel engine
US3672340A (en) * 1970-05-18 1972-06-27 Georg A Bomba Exhaust feedback and control system for internal combustion engines

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906724A (en) * 1973-12-03 1975-09-23 Toyota Motor Co Ltd Air cleaner assembly for an internal combustion engine having an exhaust gas purification system
US3990419A (en) * 1974-05-20 1976-11-09 Toyota Jidosha Kogyo Kabushiki Kaisha Air cleaner for use with an internal combustion engine
US5357936A (en) * 1991-09-26 1994-10-25 Mazda Motor Corporation Engine of a spark ignition type
US7222614B2 (en) 1996-07-17 2007-05-29 Bryant Clyde C Internal combustion engine and working cycle
US8215292B2 (en) 1996-07-17 2012-07-10 Bryant Clyde C Internal combustion engine and working cycle
US7281527B1 (en) 1996-07-17 2007-10-16 Bryant Clyde C Internal combustion engine and working cycle
US6675782B1 (en) * 1999-03-09 2004-01-13 Volvo Lastvagnar Ab International combustion engine with exhaust recirculation
US6647970B2 (en) 2001-07-09 2003-11-18 Clarence L. Hankins Exhaust gas recirculation and processing device for turbocharged diesel engine
US6526753B1 (en) 2001-12-17 2003-03-04 Caterpillar Inc Exhaust gas regenerator/particulate trap for an internal combustion engine
US7201121B2 (en) 2002-02-04 2007-04-10 Caterpillar Inc Combustion engine including fluidically-driven engine valve actuator
US7204213B2 (en) 2002-05-14 2007-04-17 Caterpillar Inc Air and fuel supply system for combustion engine
US7191743B2 (en) 2002-05-14 2007-03-20 Caterpillar Inc Air and fuel supply system for a combustion engine
US7252054B2 (en) 2002-05-14 2007-08-07 Caterpillar Inc Combustion engine including cam phase-shifting
US7178492B2 (en) 2002-05-14 2007-02-20 Caterpillar Inc Air and fuel supply system for combustion engine
US20060096279A1 (en) * 2002-09-18 2006-05-11 Daimlerchrysler Ag Internal combustion engine comprising a gas conveying system and operating method therefor
US20080283098A1 (en) * 2007-05-17 2008-11-20 Chevron Japan Ltd. Method for cleaning internal parts of gasoline engines
US8926763B2 (en) * 2007-05-17 2015-01-06 Chevron Japan Ltd. Method for cleaning internal parts of gasoline engines
WO2010073240A1 (fr) * 2008-12-28 2010-07-01 Clean Marine Procédés et dispositif de production d'énergie peu polluante
US9157360B2 (en) 2008-12-28 2015-10-13 Clean Marine As Methods and device for low contamination energy generation
US20150231558A1 (en) * 2012-09-25 2015-08-20 Alfa Laval Corporate Ab Combined cleaning system and method for reduction of sox and nox in exhaust gases from a combustion engine
US9272241B2 (en) * 2012-09-25 2016-03-01 Alfa Laval Corporate Ab Combined cleaning system and method for reduction of SOX and NOX in exhaust gases from a combustion engine
US20190186388A1 (en) * 2017-12-20 2019-06-20 Man Energy Solutions Se Exhaust Gas Recirculation Blower And Internal Combustion Engine
CN109944722A (zh) * 2017-12-20 2019-06-28 曼恩能源方案有限公司 废气再循环吹送器和内燃机
US11346309B2 (en) * 2018-08-23 2022-05-31 Volvo Truck Corporation Method for operating an internal combustion engine system
US11391249B2 (en) * 2020-10-14 2022-07-19 Fca Us Llc Engine secondary air and EGR system and method

Also Published As

Publication number Publication date
JPS4829924A (fr) 1973-04-20
JPS517262B2 (fr) 1976-03-06

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