US3802194A - Exhaust gas cleaning device - Google Patents

Exhaust gas cleaning device Download PDF

Info

Publication number
US3802194A
US3802194A US00189236A US18923671A US3802194A US 3802194 A US3802194 A US 3802194A US 00189236 A US00189236 A US 00189236A US 18923671 A US18923671 A US 18923671A US 3802194 A US3802194 A US 3802194A
Authority
US
United States
Prior art keywords
combustion chamber
engine
valve
temperature
fuel
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
US00189236A
Other languages
English (en)
Inventor
Y Tanasawa
M Yamada
M Ito
K Ishiguro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Toyota Motor Corp
Toyota Central R&D Labs Inc
Original Assignee
Toyota Motor Corp
Toyota Central R&D Labs Inc
NipponDenso Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp, Toyota Central R&D Labs Inc, NipponDenso Co Ltd filed Critical Toyota Motor Corp
Application granted granted Critical
Publication of US3802194A publication Critical patent/US3802194A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/26—Construction of thermal reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/38—Arrangements for igniting
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

  • ABSTRACT In an exhaust gas cleaning device for cleaning the exhaust gases of an engine mounted on a vehicle, of the type in which the exhaust gases are re-burned in an exhaust gas combustion chamber, provided intermediate of the exhaust pipe of the engine or combined with the exhaust manifold, with secondary fuel and secondary air supplied into said chamber, there are provided valve means for controlling the supply of said secondary fuel and secondary air to said combustion chamber according to the temperature of said combustion chamber, the suction vacuum of the engine and the vehicle
  • This invention relates to a device for cleaning the exhaust gases of vehicles, particularly automotive vehicles, by burning the exhaust gases in an exhaust gas combustion chamber provided intermediary of the exhaust pipe or combined with the exhaust manifold from the engine by supplying secondary fuel and secondary air into said chamber.
  • the catalytic converter has the advantage that a highly efficient cleaning performance can be obtained even when the reaction temperature of a catalyst layer is as high as about 500-600 C, but has the disadvantage that the catalyst is subjected to heavy deterioration by lead present in the gasoline and the catalytic activity thereof is degraded by soot or the like attaching to its surface during the low speed operation of the engine as inthe case when the automotive vehicle travel in the urban area.
  • a catalytic converter having a useful life of 50,000 miles as at the present time required in the United States of America for this type of device can hardly be obtained.
  • the manifold reactors and the afterburners whether the secondary fuel is supplied or not, generally have the problem that when the engine is operated continuously at a high speed, the combustion chamber-forming member is overheated to l,000 C or higher by the elevating temperature of the exhaust gases, and subjected to thermal breakage.
  • the same problem is possessed also by the secondary fuel feeding type after-burners of the volute combustion chamber type.
  • the present inventors found through numerous experiments and studies that complete cleaning of the exhaust gases immediately after the start of the engine can be achieved by detecting the temperature of the exhaust gas combustion chamber and regulating the flow rate of the secondary fuel or the flow rates of the secondary fuel and the secondary air supplied to said combustion chamber, according to the detected temperature of the combustion chamber so that moresecondary fuel and/or more secondary air may be supplied before the combustion chamber temperature reaches the normal reaction temperature from immediately after the start of the engine than after said combustion chamber temperature has reached said normal reaction temperature; and that the overheatingof the combustion chamber-forming member can be avoided by decreasing or shutting down the supply of the secondary fuel or the secondary fuel and the secondary air when said combustion chamber temperature rises to an excessively high level.
  • the concentrations of the harmful unburned components in the exhaust gases of gasoline engines and the quantity of the exhaust gases are largely variable depending upon the operating phase of the vehicle. For instance, during idling or deceleration of the engine after the combustion temperature has reached the normal reaction temperature, the concentrations of the harmful unburned components in the exhaust gases become particularly high and, therefore, the combustion of the exhaust gases can be continued without supplying the secondary fuel, but the continuation of combustion during deceleration occasionally becomes difficult unless the quantity of the secondary air is decreased, because otherwise the exhaust gases would be cooled.
  • the present invention has for its object the provision of a highly efficient, highly economical secondary fuel feeding type exhaust gas cleaning device for cleaning the exhaust gases of an engine by burning them in an exhaust gas combustion chamber, provided intermediate of the exhaust pipe of the engine or combined with the exhaust manifold, with secondary fuel and secondary air supplied therein; wherein the flow rate of the secondary fuel and/or the secondary air supplied to the combustion chamber are regulated, upon detecting the: temperature of said exhaust gas combustion chamber, the suction vacuum of the engine and the vehicle speed, in at least five stages, i.e.
  • a fuelinjection nozzle is provided substantially centrally of the upper wall of the chamber 6, through which the fuel supplied from a fuel pump through a secondary fuel regulating electromagnetic-valve 11 and a fuel pipe 12 is injected into the chamber 6.
  • the fuel injected from the nozzle 10 is finely atomized by the air supplied from an air pipe 8a.
  • porous body 13 is provided surrounding the fuel injection nozzle 10, which serves as an evaporative burner and receives fuel from the secondary fuel regulating electromagnetic valve 11 through a fuel pipe 14.
  • Ignition plugs 15, 15' are fixedly mounted adjacent the nozzle 10 and the porous body 13 and extended into the chamber 6. These ignition plugs l5, 15' respectively have electrodes 15a, 15a at the center thereof.
  • the nozzle. 10 and the porous body 13 are made of an electrode material and grounded so as to serve simultaneously as ground electrodes respectively.
  • Reference numeral 16 designates a power source, 17 an ignition switch of the engine 1, 18 an interrupter and 19 an ignition coil having two ignition coils electrically connected with the ignition plugs 15, 15 respectively. The arrangement is such that while the ignition switch 17 is in its closed position, the
  • interrupter l8 intermittently interrupt the primary curcomsumption can be saved.
  • FIG. 1 is a view diagrammatically showing the construction of an embodiment of the exhaust gas cleaning device according to the present invention
  • FIG. 2 is a sectional view of the secondary air regulating electromagnetic valve used in the exhaust gas cleaning device shown in FIG. 1;
  • FIG. 3 is a sectional view of the secondary fuel regulating electromagnetic valve used in the exhaust gas cleaning device shown in FIG. 1.
  • reference numeral 1 designates an engine mounted on a vehicle, 2 a suction manifold and 2 an exhaust manifold.
  • An exhaust pipe 4 having one end connected with the exhaust manifold 3 has the other end open in the upstream side of a cylindrical exhaust gas combustion chamber 5 in the tangential direction, while an exhaust pipe 4 is open in the downstream side of said exhaust gas combustion chamber 5, so that the exhaust gases swirl within said combustion chamber 5 in the direction of the arrow A.
  • On the top of the combustion chamber 5 is formed a cylindrical small chamber 6 into which secondary air necessary for the combustion of secondary fuel and the exhaust gases is supplied from an air pump 7 through a pipe 8 and a secondary air regulating electromagnetic valve 9, said air pump being driven from the engine 1.
  • the pipe 8 is open in the inner-wall of the chamber 6 in a tangential direction and the secondary air supplied from said pipe 8 swirls within said chamber 6 as indicated by the arrow rent of the ignition coil 19 and sparks are generated across the central electrodes 15a, 15a of the ignition plugs 15, 15' and the nozzle 10 and the porous body 13 by the high voltage induced in the two secondary coils,
  • the secondary air regulating electromagnetic valve 9, as shown in FIG. 2, has cooperating first and second valves 9a, 9b and an independent third valve 9c.
  • the first valve opens and closes an air passage between an inlet port 9d, communicating with the pipe 8, and a communication passage 9e
  • the second valve 9b opens and closes an air passage between the inlet port 9d anda port 9 open into the atmosphere.
  • the third valve 9c opens and closes an air passage between the communication communicating with the pipe 8.
  • the first and third valves 9a, 9c are opened establishing the communication between the inlet port 9d and the outlet port 9g, and the second valve 9b is closed breaking the communication between the inlet port 9d and port 9f.
  • the primary coil 9h is deenergized
  • the first valve 9a breaks the communication between the inlet port 9d and the outlet port 9g
  • the second valve 9b establishes the communication between the inlet port 9d and the port 9f.
  • the secondary fuel regulating electromagnetic valve 11, as shown in FIG. 3, has main regulating first valve 1 la and auxiliary second and third valves 11b, 110.
  • the first valve 11a opens and closes a main passage lle upon energization and deenergization of the primary passage 9e and an outlet port 9 coil 11d;
  • the second valve 1 lb opens and closes an auxiliary passage 11g upon energization and deenergization of the secondary coil 11f;
  • the third valve 110 opens and closes an auxiliary passage lli upon energization and deenergization of the tertiary coil 11h.
  • Diaphragms 11j, 11k, 11! are provided to prevent fuel from intruding into the coil portions.
  • the main passage lle communicates with the pipe 12, and the auxiliary passages 11g, lli communicate with the pipe 14.
  • a temperature detector 21 is provided at the portion of the combustion chamber 5 where the temperature becomes highest and a suction vacuum detector 22 is mounted in the suction manifold. Further, a vehicle speed detector 23 is mounted on the driving shaft 1 of the engine 1.
  • a control relay 20 is provided to control the current conducted to the electromagnetic valves 9, 11 in response to signals from the respective detectors 21, 22, 23 in such a manner that, when the temperature detected by the temperature detector 21 is below the normal reaction temperature, the first, second and third valves 11a, 11b, 11c of the electromagnetic valve 11 and the first and third valves 9a, 90 of the electromagnetic valve 9 will be opened independently of the signals from the other detectors 22, 23 so that a large quantity of fuel is supplied to the nozzle and a small quantity of fuel is supplied to the porous body 13, and the corresponding quantity of the secondary air is supplied from the pipes 8, 8a into the chamber 6; when the temperature detected by the temperature detector 21 is in the range from the normal reaction temperature to a set overheated temperature, the electromagnetic valve 9 will in principle be maintained in the abovedescribed operative position and the electromagnetic valve 11 will close only the first valve 11a so that a small quantity of the secondary fuel for the normal combustion is supplied to the nozzle 10; when the engine is in the idling phase, the electromagnetic valve 1 1 will open only
  • the first and third valves 9a, 90 of the electromagnetic valve 9 are opened by the signals from the temperature detector 21 and the control relay 20, whereby the secondary air is supplied into the pipes 8, 8a, and at the same time, the first, second and third valves 11a, 11b, 11c of the electromagnetic valve 11 are opened, whereby a large quantity of the secondary .fuel is supplied to the nozzle 10 to be sprayed into the chamber 6 and also supplied to the porous body 13.
  • sparks are generated across the central electrodes 15a, 15a of the ignition plugs 15, 15 and the nozzle 10 and the porous body 13, by the functions of the interrupter 18 and the ignition coil 19, and the secondary fuel injected into the chamber 6 in an atomized state from the nozzle 10 and gasified on the surface of the porous body 13 is ignited by said sparks.
  • the fuel from the nozzle 10 forms flames jetting into the combustion chamber 5 and burns the swirling flows A of the exhaust gases within said chamber.
  • the gasified fuel from the porous body 13 is caused to swirl within the chamber 6 as indicated by the arrow B by the secondary air supplied into said chamber from the pipe 8 and mixed with the exhaust gas flows within the combustion chamber 5 while burning, thereby to promote the combustion oxidation of the exhaust gases. Therefore, the exhaust gases are completely oxidized before reaching the exhaust pipe 4'.
  • the supply of the secondary fuel and the secondary air continues independently of the operating condition of the engine 1, until the temperature within the combustion chamber 5 (the temperature detected by the temperature detector 21) reaches the normal reaction temperature.
  • the current supply to the primary coil 11d of the electromagnetic valve 11 is interrupted by the action of the control relay 20 and the first valve 11a only is closed, so that the fuel supply to the nozzle 10 is interrupted and the fuel evaporating from the porous body 13 only is burned.
  • the exhaust gases are completely burned and oxidized as the temperatures of said exhaust gases and the combustion chamber are high.
  • the vacuum pressure in the suction manifold 2 becomes extremely low (e.g. below 200 mmHg), so that the control relay 20 again conducts the current to the first coil 11d of the electromagnetic valve 1 1 in response to the signal from the temperature detector 22.
  • the first valve 11 is opened and a large quantity of the secondary fuel is injected from the nozzle 10 and strong flames are jetted into the combustion chamber 5.
  • the suction vacuum pressure is extremely high (e.g. higher than 450 mm g), 80 that the control relay again start to conduct the current to the secondary coil 91 of the electromagnetic 20 valve 90 is closed.
  • a small quantity of the secondary air is supplied through the small apertures 9c formed in the third valve 90; the current supply to the secondary coil 11f of the electromagnetic valve 11 is interrupted; the second valve 11b is also closed and the quantity of the secondary fuel passing through the third valve 11c is only supplied to the porous body 13.
  • the quantity of the exhaust gases is small containing a high concentration of HC and is self-combustible.
  • the small quantity of the secondary fuel supplied from the porous body 13 serves to heat suitably the aforesaid small quantity of the secondary air and stabilize the self-combustion of the exhaust gas upon combustion.
  • the suction vacuum pressure becomes high (e.g. higher than 450 mmHg), so that the electromagnetic valve 11 remains in the same position as in the case of deceleration.
  • the current supplyto the secondary coil 9: of the electromagnetic valve 9 is interrupted in response to the signal sent from the vehicle speed detector 23 to the control relay 20 representing the vehicle speed being zero, and the third valve is opened.
  • the exhaust gases is small containing a high concentration of C0 and hence the exhaust gases are selfcombustible and generate a large amount of heat when burned.
  • the quantity of the air discharged from the air pump 7 is also small since the rotating speed of the engine 1 is low. Therefore, a continuous stable combustion of the exhaust gases can be obtained by mixing the suitably heated secondary air into the exhaust gases along with a very small quantity of the secondary fuel. as in the case of deceleration.
  • the temperature detector 2i detects a temper ature (e.g. higher than 850-900 C) predicting overheating of the combustion chamber 5, for instance, during continuous operation of the engine 1 at high speeds under large loads, the current supply to all coils 11d, 11f, 1111 of the electromagnetic valve 11 is interrupted and all of the first, second and third valves 11a, 1 lb, llc thereof are closed by the function of the control relay 20, whereby the supply of the secondary fuel is interrupted and the current supply to the primary coil 9!: of the electromagnetic valve 9 is also interrupted to close the first valve 9a.
  • the secondary air from the air pump 7 is released into the atmosphere through the second valve 9b.
  • the combustion chamber 5 constitutes merely a part of the exhaust pipe and the combustion of the exhaust gases therein ceases and hence the internal temperature of said combustion chamber drops to the level of the exhaust gas temperature, avoiding the thermal breakage of the structural members of the combustion chamber.
  • control relay 20 in response to the signals from the detectors 21, 22, 23, i.e. the operation for commencing and the operation for interrupting the current supply to the electromagnetic valves 9, 11, have hysteresis so as to avoid the so-called hunting.
  • Second valve is opened and Cruising r 4 are closed.
  • first valve is closed.
  • the quantity supplied of the secondary fuel is regulated by three valves
  • the regulation of the secondary fuel can also be achieved by employing an on-and-off control type valve and varying the width or cycle of the open or closed duration of the valve.
  • the second and third valves can be substituted by a single valve and in addition, minute regulations of the secondary fuel becomes possible.
  • the porous body 13 is made of a heat-resisting metal as an electrode material, but it is to be understood that it may be made of electric insulating materials such as ceramics, asbestos fiber and glass fiber.
  • metallic wires must of course be exposed on the surface of the porous body, with one ends thereof grounded to the wall of the chamber 6, so that sparks may be generated across the exposed ends of said wires and the central electrode 15 of the ignition plug 15'.
  • the exhaust gas cleaning device of the invention for cleaning the exhaust gases of an engine mounted on a vehicle by burning the exhaust gases in a exhaust gas combustion chamber, provided intermediate of the exhaust pipe of the engine, with secondary fuel and secondary air supplied to said combustion chamber, the quantity of the secondary fuel or the quantities of the secondary fuel and the secondary air are regulated, upon detecting the temperature of said exhaust gas combustion chamber, the suction vacuum of the engine and the vehicle speed, in at least five different stages, i.e.
  • the secondary fuel is supplied in a small quantity sufficient for heating the secondary air and maintaining the combustion of the exhaust gases
  • the secondary fuel and the secondary air are supplied in quantities necessary for assisting in combustion of the exhaust gases, whereby it becomes possible to completely clean the exhaust gases throughout the various operating phases of the engine after the engine has been warmed up and to save the consumption of the secondary fuel. It is also possible to prevent a breakage of the exhaust gas combustion chamber by overheatmg.
  • the exhaust gas cleaning device of the invention is highly efficient, highly economical and is-of great practical value.
  • the device of the invention has been shown and described as being attached to a recip rocating engine, it should also be understood that it can be attached to rotary engines similarly.
  • An exhaust gas cleaning device for cleaning the exhaust gases of an engine mounted on a vehicle by burning said exhaust gases in an exhaust gas combustion chamber, provided intermediate of the exhaust pipe of the engine, with secondary fuel and secondary air supplied to said combustion chamber, said device comprismg said combustion chamber for re-burning the exhaust gases being led into the exhaust pipe of the engine,
  • first valve means for regulating the quantity of the secondary air supplied to the combustion chamber
  • second valve means for regulating the quantity of the secondary fuel and means for operating said first and second valve means according to the temperature of said exhaust gas combustion chamber, the suction vacl 1 uum of the engine and the vehicle speed, whereby the quantities of the secondary fuel and the secondary air are regulated in at least five stages, ie. the stage in which the temperature of the combustion chamber rises to the normal reaction temperature and the engine is quickly accelerated after the engine has been started, the stage in which the engine is in the idling phase after the temperature of the combustion chamber has reached the normal reaction temperature, the stage in which the engine is decelerated, the stage in which the temperature of the combustion chamber rises to an excessively high level and the stage in which the engine is in other operating phases,
  • An exhaust gas cleaning device for cleaning the exhaust gases of an engine mounted on a vehicle by burning said exhaust gases in an exhaust gas combustion chanber, provided intermediate of the exhaust pipe of the engine, with secondary'fuel and secondary air supplied to said combustion chamber, said device comprismg said combustion chamber for re-burning the exhaust gases being led into the exhaust pipe of the engine, means for supplying the secondary air into said combustion chamber for re-burning the exhaust gases,
  • first valve means for regulating the quantity of the secondary air supplied to the combustion chamber
  • second valve means for regulating the quantity of the secondary fuel and means for operating said first and second valve means according to the temperature of said exhaust gas combustion chamber, the suction vacuum of the engine and the vehicle speed, whereby the quantities of the secondary fuel and the secondary air are regulated in at least five stages, i.e.
  • said first valve means for regulating the quantity of the secondary air includes a first valve for opening and closing a passage leading from air ing 12 supply means to said combustion chamber, a sec ond valve for closing said passage to release the air into the atmosphere and a third valve having apertures formed therein and located downstream of said first valve, and operations of said valves are controlled by said controlling means according to the temperature of the combustion chamber, the suction vacuum of the engine and the vehicle speed, whereby while the temperature of the combustion chamber rises to the normal reaction temperuture and the engine is quickly accelerated and while the engine is idling, cruising and quickly accelerated
  • An exhaust gas cleaning device as defined in claim 1, characterized in that, said exhaust gas and said secondary air are respectively introduced into said combustion chamber in a tangential direction of said chamber so as to form swirling flows in said chambers.
  • An exhaust gas cleaning device for cleaning the ex haust gases of an engine mounted on a vehicle by burning said exhaust gases in an exhaust gas combustionchamber, provided intermediate of the exhaust pipe of the engine with secondary fuel and secondary air supplied to said combustion chamber, said device comprissaid combustion chamber for re-burning the exhaust gases being led into the exhaust pipe of the engine,
  • second valve means for regulating the quantity of the secondary fuel and means for operating said first and second valve means according to the temperature of said exhaust gas combustion chamber, the suction vacuum of the engine and the vehicle speed, whereby the quantities of the secondary fuel and the secondary air are regulated in at least five stages, i.e.
  • said combustion chamber comprises a head chamber having a central opening around which a porous body is provided, said central opening is adapted for letting the secondary fuel and a portion of the secondary air go through into said head chamber enhancing the atomization of said fuel by said portion of air, said porous body is adapted for evaporating said secondary fuel from the surface thereof being supplied with secondary fuel independently of said secondary fuel to be atomized, the remaining portion of said secondary air is blown into said head chamber in a tangential direction thereof, said exhaust gases, are introduced into a portion of said combustion chamber other than the portion of said head chamber in a
  • said first valve means for regulating the quantity of the secondary air includes a first valve for opening and closing a passage leading from said air supply means to said central opening and a tangentially orientated port provided at said head chamber, a second valve for closing said passage to release the air into the atmosphere, and a third valve having apertures formed therein and located at the downstream of said first valve, and operation of said valves are controlled by said controlling means according to the temperature of said combustion chamber, the suction vacuum in the intake pipe and the vehicle speed, whereby while the temperature of the combustion chamber rises to the normal reaction temperature and while the engine is idling, cruising and quickly accelerated, said first and third valves are opened with said second valves being closed to supply a large quantity of air into said head chamber, and while the engine is decelerated said first valve is opened with said second and third valve being closed to supply a small quantity of air into said head chamber through the apertures formed in said third valve, whereas when the combustion chamber is overheated, said
  • An exhaust gas cleaning device for cleaning the exhaust gases of an engine mounted on a vehicle by burning said exhaust gases in an exhaust gas combustion chamber, provided intermediate of the exhaust pipe of the engine with secondary fuel and secondary air supplied to said combustion chamber, said device comprismg said combustion chamber for re-burning the exhaust gases being led into the exhaust pipe of the engine,
  • first valve means for regulating the quantity of the secondary air supplied to the combustion chamber
  • second valve means for regulating the quantity of the secondary fuel and means for operating said first and second valve means according to the temperature of said exhaust gas combustion chamber, the suction vacuum of the engine and vehicle speed, whereby the quantities of the secondary fuel and the secondary air are regulated in at least five stages, i.e. the stage in which the temperature of the combustion chamber rises to the normal reaction temperature and the engine is quickly accelerated after the engine has been started, the stage in which the engine is in the idling phase after the temperature of the combustion chamber has reached the normal reaction temperature, the stage in which the engine is decelerated, the stage in which the temperature of the combustion chamber rises to an excessively high level and the stage in which the engine is in other operating phases,
  • said first valve means for regulating the quantity of the secondary air includes a first valve for opening and closing a passage leading from said air supply means to said combustion chamber, a second valve for closing said passage to release the air into the atmosphere and a third valve having apertures formed therein and located at the downstream of said first valve, and the operations of said valves are controlled by said controlling means according to the temperature of the combustion chamber, the suction vacuum in the intake pipe and the vehicle speed, whereby while the temperature of the combustion chamber rises to the normal reaction temperature and while the engine is idling, cruising and quickly accelerated after the engine has been warmed up, said first and third valves are opened and said second valve is closed to supply a large quantity of air into said combustion chamber, and while the engine is decelerated said first valve is opened and said second and third valve are closed to supply a small quantity of air into said combustion chamber through the apertures formedvin said third valve, whereas when the combustion chamber is overheated, said first valve is closed and said second valve is opened to release the air into the atmosphere.
  • said second valve means for regulating the quantity of the secondary fuel includes a first valve for opening and closing a passage leading from said means for supplying the secondary fuel to said combustion chamber, a second valve for opening and closing a passage leading from said means for supplying the secondary fuel to a porous body provided within said combustion chamber, and a third,
  • valve which is adapted for opening and closing another passage communicating said means for supplying the secondary fuel to said porous body, and the operations of said valves of the second valve means are controlled by said controlling means according to the temperature of the combustion chamber, the suction vacuum of the engine and the vehicle speed, whereby while the temperature of the combustion chamber rises to the normal reaction temperature and the engine is quickly accelerated,- said first and second and the third valves are opened to supply a large quantity of the second fuel into said combustion chamber, while the engine is idling and decelerated said first and second valves are closed with said third valve being opened to supply minimum quantity of the second fuel only to said porous body, while the engine is in cruising condition said first valve is closed with said second and said third valves being opened to supply a proper quantity of second fuel only to said porous body, whereas when the combustion chamber is overheated said three valves are all closed to shut the second fuel off.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Magnetically Actuated Valves (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US00189236A 1970-12-26 1971-10-14 Exhaust gas cleaning device Expired - Lifetime US3802194A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45128991A JPS5032892B1 (en, 2012) 1970-12-26 1970-12-26

Publications (1)

Publication Number Publication Date
US3802194A true US3802194A (en) 1974-04-09

Family

ID=14998407

Family Applications (1)

Application Number Title Priority Date Filing Date
US00189236A Expired - Lifetime US3802194A (en) 1970-12-26 1971-10-14 Exhaust gas cleaning device

Country Status (2)

Country Link
US (1) US3802194A (en, 2012)
JP (1) JPS5032892B1 (en, 2012)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906723A (en) * 1974-03-08 1975-09-23 Toyota Motor Co Ltd Exhaust gas purifying system
US3994131A (en) * 1972-08-30 1976-11-30 Hitachi, Ltd. Vortical flow afterburner device
US4002025A (en) * 1974-10-31 1977-01-11 Nippon Soken, Inc. System for heating intake pipe of internal combustion engine
US4301651A (en) * 1973-04-11 1981-11-24 Exxon Research & Engineering Co. Exhaust gas reactor
US5609024A (en) * 1994-12-28 1997-03-11 Mitsubishi Denki Kabushiki Kaisha Exhaust gas purification apparatus for internal combustion engine
US8746197B2 (en) 2012-11-02 2014-06-10 Mcalister Technologies, Llc Fuel injection systems with enhanced corona burst
US8919377B2 (en) 2011-08-12 2014-12-30 Mcalister Technologies, Llc Acoustically actuated flow valve assembly including a plurality of reed valves
US8997725B2 (en) * 2008-01-07 2015-04-07 Mcallister Technologies, Llc Methods and systems for reducing the formation of oxides of nitrogen during combustion of engines
US9051909B2 (en) 2008-01-07 2015-06-09 Mcalister Technologies, Llc Multifuel storage, metering and ignition system
US9169814B2 (en) 2012-11-02 2015-10-27 Mcalister Technologies, Llc Systems, methods, and devices with enhanced lorentz thrust
US9169821B2 (en) 2012-11-02 2015-10-27 Mcalister Technologies, Llc Fuel injection systems with enhanced corona burst
US9194337B2 (en) 2013-03-14 2015-11-24 Advanced Green Innovations, LLC High pressure direct injected gaseous fuel system and retrofit kit incorporating the same
US9200561B2 (en) 2012-11-12 2015-12-01 Mcalister Technologies, Llc Chemical fuel conditioning and activation
US9371787B2 (en) 2008-01-07 2016-06-21 Mcalister Technologies, Llc Adaptive control system for fuel injectors and igniters
US9581116B2 (en) 2008-01-07 2017-02-28 Mcalister Technologies, Llc Integrated fuel injectors and igniters and associated methods of use and manufacture

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1004785A (en) * 1962-08-17 1965-09-15 Prat Daniels Stroud Ltd Improvements in or relating to smoke-consuming apparatus
US3218134A (en) * 1960-11-10 1965-11-16 Gulf Research Development Co Apparatus for burning internal combustion engine exhaust
US3360927A (en) * 1964-02-04 1968-01-02 Holley Carburetor Co Afterburner system for an automotive vehicle
US3481144A (en) * 1967-02-27 1969-12-02 Jacque C Morrell Apparatus and process for treatment of exhaust gases from internal combustion engines and controls for the same
US3549333A (en) * 1968-07-23 1970-12-22 Universal Oil Prod Co Recuperative form of direct thermal incinerator
US3680318A (en) * 1969-12-29 1972-08-01 Yasuo Nakajima Centralized air-pollution preventive system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3218134A (en) * 1960-11-10 1965-11-16 Gulf Research Development Co Apparatus for burning internal combustion engine exhaust
GB1004785A (en) * 1962-08-17 1965-09-15 Prat Daniels Stroud Ltd Improvements in or relating to smoke-consuming apparatus
US3360927A (en) * 1964-02-04 1968-01-02 Holley Carburetor Co Afterburner system for an automotive vehicle
US3481144A (en) * 1967-02-27 1969-12-02 Jacque C Morrell Apparatus and process for treatment of exhaust gases from internal combustion engines and controls for the same
US3549333A (en) * 1968-07-23 1970-12-22 Universal Oil Prod Co Recuperative form of direct thermal incinerator
US3680318A (en) * 1969-12-29 1972-08-01 Yasuo Nakajima Centralized air-pollution preventive system

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994131A (en) * 1972-08-30 1976-11-30 Hitachi, Ltd. Vortical flow afterburner device
US4301651A (en) * 1973-04-11 1981-11-24 Exxon Research & Engineering Co. Exhaust gas reactor
US3906723A (en) * 1974-03-08 1975-09-23 Toyota Motor Co Ltd Exhaust gas purifying system
US4002025A (en) * 1974-10-31 1977-01-11 Nippon Soken, Inc. System for heating intake pipe of internal combustion engine
US5609024A (en) * 1994-12-28 1997-03-11 Mitsubishi Denki Kabushiki Kaisha Exhaust gas purification apparatus for internal combustion engine
US8997725B2 (en) * 2008-01-07 2015-04-07 Mcallister Technologies, Llc Methods and systems for reducing the formation of oxides of nitrogen during combustion of engines
US9051909B2 (en) 2008-01-07 2015-06-09 Mcalister Technologies, Llc Multifuel storage, metering and ignition system
US9371787B2 (en) 2008-01-07 2016-06-21 Mcalister Technologies, Llc Adaptive control system for fuel injectors and igniters
US9581116B2 (en) 2008-01-07 2017-02-28 Mcalister Technologies, Llc Integrated fuel injectors and igniters and associated methods of use and manufacture
US8919377B2 (en) 2011-08-12 2014-12-30 Mcalister Technologies, Llc Acoustically actuated flow valve assembly including a plurality of reed valves
US8752524B2 (en) 2012-11-02 2014-06-17 Mcalister Technologies, Llc Fuel injection systems with enhanced thrust
US8746197B2 (en) 2012-11-02 2014-06-10 Mcalister Technologies, Llc Fuel injection systems with enhanced corona burst
US9169814B2 (en) 2012-11-02 2015-10-27 Mcalister Technologies, Llc Systems, methods, and devices with enhanced lorentz thrust
US9169821B2 (en) 2012-11-02 2015-10-27 Mcalister Technologies, Llc Fuel injection systems with enhanced corona burst
US9631592B2 (en) 2012-11-02 2017-04-25 Mcalister Technologies, Llc Fuel injection systems with enhanced corona burst
US9200561B2 (en) 2012-11-12 2015-12-01 Mcalister Technologies, Llc Chemical fuel conditioning and activation
US9194337B2 (en) 2013-03-14 2015-11-24 Advanced Green Innovations, LLC High pressure direct injected gaseous fuel system and retrofit kit incorporating the same

Also Published As

Publication number Publication date
JPS5032892B1 (en, 2012) 1975-10-25

Similar Documents

Publication Publication Date Title
EP0380838B1 (en) Ultrasonic burner system for regenerating a filter
US3802194A (en) Exhaust gas cleaning device
US3775064A (en) Apparatus for detoxifying exhaust emissions of an internal-combustion engine
US3779015A (en) Exhaust gas treating system for internal combustion engine
US4730455A (en) Process and system for the regeneration of particulate filter traps
JP3150150B2 (ja) 内燃機関の作動方法
CA1296265C (en) Apparatus for regeneration of a particulate filter in diesel engine
US4506506A (en) Exhaust emission control device for diesel engine
US3918257A (en) Exhaust gas purifying device for an internal combustion engine
US8424291B2 (en) Flame glow plug
GB2408470A (en) An engine exhaust system
US3785151A (en) Exhaust gas recirculation system
US4030464A (en) Fuel-air mixture heating device for use with internal combustion engine
US3973916A (en) Emissions control system for an automotive vehicle or the like
US3934412A (en) Thermal reactor for afterburning automotive internal combustion engine exhaust gases
US4104881A (en) Prevention of overheating of catalytic converter for engine exhaust gases
US3978836A (en) Suction heat control unit in internal combustion engine
US3837814A (en) Exhaust gas cleaning device
JPS5820918A (ja) 排気浄化装置
CA1048358A (en) Exhaust manifold for internal combustion engines
US3750401A (en) Exhaust gas after-burning system for automotive internal combustion engine
JPS60135612A (ja) 内燃機関の排気微粒子処理装置
JPS5929718A (ja) パテイキユレ−トフイルタの再生用バ−ナ
JPS6337468Y2 (en, 2012)
JPH0324820Y2 (en, 2012)