WO1999002844A1 - Blow-by gas recirculation apparatus for internal combustion engine - Google Patents

Blow-by gas recirculation apparatus for internal combustion engine Download PDF

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Publication number
WO1999002844A1
WO1999002844A1 PCT/KR1998/000206 KR9800206W WO9902844A1 WO 1999002844 A1 WO1999002844 A1 WO 1999002844A1 KR 9800206 W KR9800206 W KR 9800206W WO 9902844 A1 WO9902844 A1 WO 9902844A1
Authority
WO
WIPO (PCT)
Prior art keywords
blow
gas
heat exchanging
exchanging device
gas recirculation
Prior art date
Application number
PCT/KR1998/000206
Other languages
French (fr)
Inventor
Jong Gae Chung
Original Assignee
Jong Gae Chung
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 Jong Gae Chung filed Critical Jong Gae Chung
Priority to AU82453/98A priority Critical patent/AU8245398A/en
Publication of WO1999002844A1 publication Critical patent/WO1999002844A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • 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
    • F02M31/16—Other apparatus for heating fuel
    • F02M31/18—Other apparatus for heating fuel to vaporise fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/032—Producing and adding steam
    • F02M25/035—Producing and adding steam into the charge intakes
    • 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
    • F02M31/06—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air
    • F02M31/08—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air the gases being exhaust gases
    • 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

  • This invention relates generally to a blow - by gas recirculation apparatus for internal combustion engines, more particularily to an apparatus adapted to recirculate a blow-by gas heated by the heat of an exhaust gas to an intake manifold for recombustion in the engine.
  • the blow - by gas is heated by the heat exchanged from the exhaust gas and is returned to the intake manifold to achieve low emission rate of a pollutant such as CO, CH and nitrogen oxides and to increase combustion efficieny.
  • combustion promoting device cannot be commercially used because the dual pipe structure in the exhaust manifold and connection tube is complex and it requires the reconstruction of an engine structure. It has been proposed that the Further technique of atomizing the fuel oil is to be delivered into the carburetor at higher temperature, in which an electric heater is provided in a passage for a fuel oil to be supplied to a carburetor. However, such technique needs additive electric power consumption.
  • Another object of the present invention is to provide an apparatus for recirculating the blow-by gas heated by the heat from an exhaust gas to an intake passage, whereby the combustion of the mixture of air and fuel oil is promoted to produce an increased output power and reduce the emission of a pollutant.
  • Another object of the invention is to provide an apparatus adding a gasified water together with the blow - by gas to an intake passage, whereby the oxygen and hydrogen produced by the thermal analyzing of gasified water in a cylinder promote the complete combustion of fuel oil in the cylinders to increase an output power.
  • an apparatus which comprises a heat exchanging device adapted to mounted on an exhaust pipe, including an annular body which has an opening for insertion of a exhaust pipe extended from an engine, the annular body having an internal passage for a blow - by gas flow which is blocked by a wall and the internal passage communicating with an inlet pipe and an outlet pipe at both ends thereof .
  • Fig.l is a partially sectional view of a heat exchanging device of an blow - by gas recirculation apparatus according to the present invention
  • Fig.2 is a perspective view of the heat exchanging device according to the present invention.
  • Fig.3 schematically shows the first embodied arrangement of the heat exchanging device in Figure 2 mounted on an engine
  • Fig.4 is a schematic view of the second embodied arrangement of the heat exchanging device according to the present invention
  • Fig.5 is a schematic view of the third embodied arrangement of the heat exchanging device of the present invention
  • Fig.6 is a schematic view of the fourth embodied arrangement of the heat exchanging device of the present invention.
  • Fig.2 shows a heat exchanging device 2 of a blow - gas recirculation apparatus 1 according to the present invention.
  • the heat exchanging device 2 comprises an annular body having an opening 11 in the center, into which a exhaust pipe 33 extended from an engine is inserted.
  • the annular body has an internal passage 16 for a blow - by gas flow which is blocked by a wall 15.
  • the internal passage 16 communicates with an inlet pipe 13 and an outlet pipe 14 at both ends thereof .
  • the annular body of the heat exchanging device 2 includes two flanges 17 with opening, respectively formed at opposite sides to fix to the mounting flange of a three way catalytic convert 34.
  • the blow - by gas is generally composed of hydrocarbon gas produced from incomplete combustion, which is leaked from the engine cylinder to the crankcase.
  • the blow - by gas discharged into the atmosphere causes air pollutions.
  • the inlet pipe 13 communicates with a positive crankcase ventilation valve (PCV valve) 39 provided at an exhaust pipe for a blow-by gas in the engine 30, as shown in Fig. 3, while the outlet pipe 14 communicating with an intake manifold 38.
  • PCV valve positive crankcase ventilation valve
  • the blow-by gas exhausted from the engine 30 through the PCV valve 39 flows to the intake manifold 38 through the internal passage 16 of the annular body of the heat exchanging device 2.
  • the reference numerals 35, 36, 37 and 31 indicate a fuel tank, a fuel pump, cleaner and carburetor, respectively.
  • the combustion gas is exhausted to the exhaust pipes 33 via the exhaust manifold 32 and the three way catalytic convert 34 at which the noise of the exhaust gas is decreased and a pollutant is first removed.
  • the temperature of the exhaust pipe 33 adjacent to the three way catalytic convert 34 is of about 800°C - 850°C under unload condition of the engine.
  • the blow - by gas exhausted from the PCV valve 39 is heated during its flow through the inlet pipe 13, internal passage 16 and outlet pipe 14 of the heat exchanging device 2 so that the temperature of the blow - by gas of about 80°C is increased to about 800°C .
  • the heat exchanging device 2 may be arranged as shown in Fig.4, wherein a mixing valve 21 is provided in the passage between the PCV valve and heat exchanging device 2 to add an vaporous water, which is supplied by a pump 23 provided at a water tank 22, into the blow - by gas therein.
  • the supplied vaporous water together with the blow - by gas is heated at a high temperature as mentioned above to be atomized and is added to an intake manifold, so that the atomized water supplied to the cylinder is analyzed into the oxygen and hydrogen to promote the complete combustion of the fuel in the cylinder . Accordingly, it obtains the improved output of the engine and combustion efficiency.
  • the heat exchanging device 2 may be arranged as shown in Fig. 5, which is different from the first and second embodiments in that the fuel supplied by a fuel pump 36 via a fuel filter 37 is directed to the device 2 so that the fuel supplied to the carburetor 31 is heated to the temperature of about 800°C of the device 2 and is sufficiently atomized to obtain the complete combustion of the fuel in the cylinder .
  • the heat exchanging device 2 may be arranged as shown in Fig. 6, wherein the device 2 is provided to heat the vaporous water supplied by the pump 23 and to direct it to the fuel in the conduit between the carburetor 31 and fuel filter 37 through a valve 21 so that the fuel is sufficiently atomized and is supplied to the cylinder .
  • the blow - by gas of relatively lowered temperature is heated by the heat exchanging device 2 and is supplied to the intake manifold, the mixture of the fuel vapor and the air mixed with the heated blow - by gas to about 800°C is sufficiently atomized to promote complete combustion in the engine, whereby the output power is increased and the amount of nitrogen oxides together with hydrocarbon produced from the engine is highly decreased.
  • the heat exchanging device according to the present invention may be easily mounted on the three way catalytic convert in the exhaust pipe without cansing any problem.
  • the heat exchanging device may be employed into the gasoline, diesel or LPG gas engines.
  • the specification and embodiments are interded to be considered illustrative only, with the scope and spirit of the invention being limited by the following claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

A blow - by gas recirculation apparatus (1) comprising a heat exchanging device (2) adapted to be mounted on an exhaust pipe (33). The apparatus includes an annular body which has an opening (11) for insertion of an exhaust pipe (33) extended from the engine, the annular body having an internal passage (16) for a blow - by gas flow which is blocked by a wall (15) and the internal passage (16) communicating with an inlet pipe (13) and an outlet pipe (14) at both ends thereof.

Description

BLOW-BY GAS RECIRCULATION APPARATUS FOR INTERNAL COMBUSTION ENGINE
Field of the invention
This invention relates generally to a blow - by gas recirculation apparatus for internal combustion engines, more particularily to an apparatus adapted to recirculate a blow-by gas heated by the heat of an exhaust gas to an intake manifold for recombustion in the engine. The blow - by gas is heated by the heat exchanged from the exhaust gas and is returned to the intake manifold to achieve low emission rate of a pollutant such as CO, CH and nitrogen oxides and to increase combustion efficieny.
Background of the invention
There has been many efforts to use the exhaust gas heat of the internal combustion engine of vehicles in the cooling system, heating system and combustion promoting device. One example of a combustion promoting device is disclosed in The Korean Utility Model Publication No. 94-2806 with the title "a carburetor for internal combustion engine availing the heat of exhaust gas", in which the respective pipe of an exhaust manifold is provided with an outer pipe concentrically arranged to form a dual pipe system. The outer pipes are merged into the connecting tube which is communicated with a carburetor, whereby an intake air in the outer pipes is heated by the heat of exhaust gas. Thus, the preheated mixture of air and fuel in the carburetor is gasified by the heated additive air to promote the combustion in the engine cylinders.
However, such combustion promoting device cannot be commercially used because the dual pipe structure in the exhaust manifold and connection tube is complex and it requires the reconstruction of an engine structure. It has been proposed that the Further technique of atomizing the fuel oil is to be delivered into the carburetor at higher temperature, in which an electric heater is provided in a passage for a fuel oil to be supplied to a carburetor. However, such technique needs additive electric power consumption.
Summary of the invention
Accordingly, it is the object of the present invention to provide an improved blow - by gas recirculation apparatus for internal combustion engines for promoting a complete combustion in an engine, in which the above described problems are eliminated.
Another object of the present invention is to provide an apparatus for recirculating the blow-by gas heated by the heat from an exhaust gas to an intake passage, whereby the combustion of the mixture of air and fuel oil is promoted to produce an increased output power and reduce the emission of a pollutant. Another object of the invention is to provide an apparatus adding a gasified water together with the blow - by gas to an intake passage, whereby the oxygen and hydrogen produced by the thermal analyzing of gasified water in a cylinder promote the complete combustion of fuel oil in the cylinders to increase an output power.
The above mentioned objects of the invention are achieved by an apparatus which comprises a heat exchanging device adapted to mounted on an exhaust pipe, including an annular body which has an opening for insertion of a exhaust pipe extended from an engine, the annular body having an internal passage for a blow - by gas flow which is blocked by a wall and the internal passage communicating with an inlet pipe and an outlet pipe at both ends thereof .
Brief description of the invention The present invention will now be described by way of examples with reference to the accompanying drawings of which;
Fig.l is a partially sectional view of a heat exchanging device of an blow - by gas recirculation apparatus according to the present invention;
Fig.2 is a perspective view of the heat exchanging device according to the present invention;
Fig.3 schematically shows the first embodied arrangement of the heat exchanging device in Figure 2 mounted on an engine;
Fig.4 is a schematic view of the second embodied arrangement of the heat exchanging device according to the present invention; Fig.5 is a schematic view of the third embodied arrangement of the heat exchanging device of the present invention;
Fig.6 is a schematic view of the fourth embodied arrangement of the heat exchanging device of the present invention.
Fig.2 shows a heat exchanging device 2 of a blow - gas recirculation apparatus 1 according to the present invention. The heat exchanging device 2 comprises an annular body having an opening 11 in the center, into which a exhaust pipe 33 extended from an engine is inserted. The annular body has an internal passage 16 for a blow - by gas flow which is blocked by a wall 15. The internal passage 16 communicates with an inlet pipe 13 and an outlet pipe 14 at both ends thereof . The annular body of the heat exchanging device 2 includes two flanges 17 with opening, respectively formed at opposite sides to fix to the mounting flange of a three way catalytic convert 34. The blow - by gas is generally composed of hydrocarbon gas produced from incomplete combustion, which is leaked from the engine cylinder to the crankcase. The blow - by gas discharged into the atmosphere causes air pollutions.
The inlet pipe 13 communicates with a positive crankcase ventilation valve (PCV valve) 39 provided at an exhaust pipe for a blow-by gas in the engine 30, as shown in Fig. 3, while the outlet pipe 14 communicating with an intake manifold 38. According to the present invention that is, the blow-by gas exhausted from the engine 30 through the PCV valve 39 flows to the intake manifold 38 through the internal passage 16 of the annular body of the heat exchanging device 2.
The reference numerals 35, 36, 37 and 31 indicate a fuel tank, a fuel pump, cleaner and carburetor, respectively.
When the engine 30 is operated, the combustion gas is exhausted to the exhaust pipes 33 via the exhaust manifold 32 and the three way catalytic convert 34 at which the noise of the exhaust gas is decreased and a pollutant is first removed. The temperature of the exhaust pipe 33 adjacent to the three way catalytic convert 34 is of about 800°C - 850°C under unload condition of the engine. Thus, the blow - by gas exhausted from the PCV valve 39 is heated during its flow through the inlet pipe 13, internal passage 16 and outlet pipe 14 of the heat exchanging device 2 so that the temperature of the blow - by gas of about 80°C is increased to about 800°C . The heated blow - by gas is supplied to the intake manifold 38, which promotes the atomization of the fuel supplied from the carburetor 31 to improve the ignition of the fuel and the combustion efficiency in the cylinder . According to the second embodiment of the present invention, the heat exchanging device 2 may be arranged as shown in Fig.4, wherein a mixing valve 21 is provided in the passage between the PCV valve and heat exchanging device 2 to add an vaporous water, which is supplied by a pump 23 provided at a water tank 22, into the blow - by gas therein. Thus, the supplied vaporous water together with the blow - by gas is heated at a high temperature as mentioned above to be atomized and is added to an intake manifold, so that the atomized water supplied to the cylinder is analyzed into the oxygen and hydrogen to promote the complete combustion of the fuel in the cylinder . Accordingly, it obtains the improved output of the engine and combustion efficiency.
According to the third embodiment of the present invention, the heat exchanging device 2 may be arranged as shown in Fig. 5, which is different from the first and second embodiments in that the fuel supplied by a fuel pump 36 via a fuel filter 37 is directed to the device 2 so that the fuel supplied to the carburetor 31 is heated to the temperature of about 800°C of the device 2 and is sufficiently atomized to obtain the complete combustion of the fuel in the cylinder .
According to the fourth embodiment of the present invention, the heat exchanging device 2 may be arranged as shown in Fig. 6, wherein the device 2 is provided to heat the vaporous water supplied by the pump 23 and to direct it to the fuel in the conduit between the carburetor 31 and fuel filter 37 through a valve 21 so that the fuel is sufficiently atomized and is supplied to the cylinder . According to the present invention, as the blow - by gas of relatively lowered temperature is heated by the heat exchanging device 2 and is supplied to the intake manifold, the mixture of the fuel vapor and the air mixed with the heated blow - by gas to about 800°C is sufficiently atomized to promote complete combustion in the engine, whereby the output power is increased and the amount of nitrogen oxides together with hydrocarbon produced from the engine is highly decreased.
Furthermore, there is an advantage that the heat exchanging device according to the present invention may be easily mounted on the three way catalytic convert in the exhaust pipe without cansing any problem.
Other embodiments of the invention will be apparent to those skilled in the art from the consideration of the specification and practice of the invention disclosed herein. For example, the heat exchanging device may be employed into the gasoline, diesel or LPG gas engines. The specification and embodiments are interded to be considered illustrative only, with the scope and spirit of the invention being limited by the following claims.

Claims

What is claimed is:
1. A blow - by gas recirculation apparatus 1 comprising a heat exchanging device 2 adapted to mounted on an exhaust pipe 33, including an annular body which has an opening 11 for insertion of a exhaust pipe 33 extended from an engine, the annular body having an internal passage 16 for a blow - by gas flow which is blocked by a wall 15 and the internal passage 16 communicating with an inlet pipe 13 and an outlet pipe 14 at both ends thereof.
2. The blow - by gas recirculation apparatus of claim 1, wherein the inlet pipe 13 of the heat exchanging device 12 communicates with the outlet side of a positive crankcase ventilation valve (PCV valve) 39 provided at an exhaust pipe, while the outlet pipe 14 communicating with an intake manifold 38.
3. The blow - by gas recirculation apparatus of claim 1, wherein the inlet pipe 13 of the heat exchanging device 12 communicates with the outlet sides of a PCV valve 39 and a pump 23 provided at a water tank 22.
PCT/KR1998/000206 1997-07-11 1998-07-11 Blow-by gas recirculation apparatus for internal combustion engine WO1999002844A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU82453/98A AU8245398A (en) 1997-07-11 1998-07-11 Blow-by gas recirculation apparatus for internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1997/32155 1997-07-11
KR1019970032155A KR100272651B1 (en) 1997-07-11 1997-07-11 A promotive device for combustion using exhaust-heat in automobile engine

Publications (1)

Publication Number Publication Date
WO1999002844A1 true WO1999002844A1 (en) 1999-01-21

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ID=19514129

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1998/000206 WO1999002844A1 (en) 1997-07-11 1998-07-11 Blow-by gas recirculation apparatus for internal combustion engine

Country Status (3)

Country Link
KR (1) KR100272651B1 (en)
AU (1) AU8245398A (en)
WO (1) WO1999002844A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779221A (en) * 1971-11-23 1973-12-18 J Gartner Internal combustion engine pollution control device
US4068628A (en) * 1976-02-03 1978-01-17 Charles England Duckworth Internal combustion engine with designated exhaust burning cylinders

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779221A (en) * 1971-11-23 1973-12-18 J Gartner Internal combustion engine pollution control device
US4068628A (en) * 1976-02-03 1978-01-17 Charles England Duckworth Internal combustion engine with designated exhaust burning cylinders

Also Published As

Publication number Publication date
AU8245398A (en) 1999-02-08
KR100272651B1 (en) 2000-12-01
KR19990009683A (en) 1999-02-05

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