US3812673A - Forced draft cooling system for an exhaust gas purifying device - Google Patents

Forced draft cooling system for an exhaust gas purifying device Download PDF

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Publication number
US3812673A
US3812673A US00165463A US16546371A US3812673A US 3812673 A US3812673 A US 3812673A US 00165463 A US00165463 A US 00165463A US 16546371 A US16546371 A US 16546371A US 3812673 A US3812673 A US 3812673A
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Prior art keywords
air
cooling
valve
jacket
cooling air
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US00165463A
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English (en)
Inventor
T Muroki
T Tadokoro
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Mazda Motor Corp
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Toyo Kogyo Co Ltd
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Priority claimed from JP1970074007U external-priority patent/JPS4719362Y1/ja
Priority claimed from JP1970077076U external-priority patent/JPS4720966Y1/ja
Priority claimed from JP1970077075U external-priority patent/JPS4720965Y1/ja
Priority claimed from JP7694270U external-priority patent/JPS544566Y1/ja
Priority claimed from JP1970076943U external-priority patent/JPS4719363Y1/ja
Application filed by Toyo Kogyo Co Ltd filed Critical Toyo Kogyo Co Ltd
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    • 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
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • F01N3/222—Control of additional air supply only, e.g. using by-passes or variable air pump drives using electric valves only
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/05—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of air, e.g. by mixing exhaust with air
    • 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
    • F01N3/18—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
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • 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
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • F01N3/227—Control of additional air supply only, e.g. using by-passes or variable air pump drives using pneumatically operated valves, e.g. membrane valves
    • 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

  • ABSTRACT A forced draft cooling system for an exhaust gas purifying device for forcibly cooling the latter without any substantial reduction of the temperature within the interior of the device in which combustion of unburned noxious compounds of an exhaust gas emitted from the exhaust system of an internal combustion engine take place, which comprises means for supplying a cooling air to the surrounding of the device to effect the forced cooling and .means for supplying a secondary air to the interior of the device, the supply of said cooling air to the surrounding of the device being effected in association with the supply of said secondary air in response to the engine condition or the temperature of the engine or of the exhaust system. Also provided is a single valve structure into which various valving devices employed are assembled.
  • FIGS 4 (o) (b) Y E Y Y Q 7 Q 9. 7 U, u, B 2 g g X g gNONINZ gNoN'? N3 55 Pl E: m ENGINE SPEED m, N 3
  • the present invention relates to a novel cooling system and, more particularly, to a forced draft cooling system adaptable in an exhaust gas purifying device for purifying noxious compounds present in an exhaust gas emitted from the exhaust system of an internal combustion engine, which is effective to forcibly cooling the purifying device to improve the durability thereof.
  • the thermal reactor or afterburner is one of the exhaust gas purifying devices heretofore proposed, wherein noxious gas compounds present in an exhaust gas emitted from the exhaust system of the internal combustion engine are burned in the reaction chamber thereof with the aid of an additionally supplied fresh air so that the amount of the noxious gas compounds can be reduced before letting them escape to the atmosphere.
  • the higher the temperature within the reaction chamber of the thermal reactor the more efficiently combustion of the noxious gas compounds takes place in the reaction chamber.
  • the higher temperature accelerates deterioration of material employed for a shell surrounding the reaction chamber, in addition to oxidation of the shell.
  • material ordinarily used for the shell of the reactor has a definite heat resistance and, once this material is affected by the temperature higher than the heat resistance, heat deformation will take place.
  • the thermal reactor heretofore largely employed has a tendency that the durability thereof is substantially reduced, and replacement of the used reactor for a new one is oftentimes necessitated.
  • the reactor To improve the durability of the reactor and/or to facilitate the use of material for the shell which has a relatively lower heat resistance than heretofore required, the reactor must be cooled. However, if cooling is merely effected to the reactor, combustion of the unburned noxious compounds will not undergo efficiently. ln other words, the amount of cooling air to be used for cooling and the amount of secondary air to be supplied to the reaction chamber must be efficiently controlled with respect to the engine condition. This will be explained with reference to FIG. 1 in which the temperature distribution with respect to the shell 6 is shown.
  • reference numerals 6a and 6b designate the outside and inside surfaces of the shell 6, respectively, facing toward the cooling air and the reaction chamber. It is here assumed that the temperature required for effecting a normal combustion of the unburned noxious compounds in the reaction chamber is the value Z. In the case where the cooling is not effected, the temperature curve follows as indicated by 0, while follows as indicated by R in the case where it is effected.
  • the air in the static condition in contact with the outside surface 611 of the shell 6 has a temperature higher than that of in the dynamic or flowing condition in contact therewith and, in the proximity of the outside surface 6a, the temperature of the air in the static condition has a tendency to be elevated by the heat transmitted from the reaction chamber through the shell, in a value greater than that given by the air in the dynamic condition.
  • a zone. of the higher temperature Z should exist from the proximity of the inside surface 6b of the shell 6, or otherwise the efficient combustion of the unburned noxious compounds will not be ensured.
  • the cooling is preferably concentrated more extensively than in the former case. In other words, the'supply of the secondary air to the reaction chamber even during this condition will result in the unnecessary increase of the temperature of the shell.
  • an essential object of the present invention is to provide a novel forced draft cooling system for cooling the surrounding of an exhaust gas purifying device without any substantial reduction of the temperature of an exhaust gas emitted from the exhaust system of an internal combustion engine in response to the engine condition.
  • Another object of the present invention is to provide a novel forced draft cooling system for cooling the surrounding of an exhaust gas purifying device in response to the engine condition which can improve the durability of an exhaust gas" purifying device without any substantial reduction of the performance.
  • a further object of the present invention is to provide a novel forced draft cooling system for cooling the surrounding of an exhaust gas purifying device in response to theengine condition which'facilitates the use of material for that device having a relatively lower heat resistance.
  • a still further object of the present invention is to provide a novel forced draft cooling system for cooling the surrounding of an exhaust gas purifying device which comprises, in its simplified form, means for supplying a cooling air to the surrounding of the exhaust gas purifying device and means for supplying a secondary air to the interior of the exhaust gas purifying device, the supply of said cooling air being performed in association with the operation of the second mentioned means with respect to the condition in which an internal combustion engine is placed.
  • a still further object of the present invention is to provide a novel forced draft cooling system for cooling the surrounding of an exhaust gas purifying device which can be installed in connection with an internal combustion engine equpped with the conventional exhaust gas purifying device at lower cost and in a simplified procedure.
  • a further object of the present invention is to provide the forced draft cooling system of the above character wherein means is provided for preventing a possible destruction of various components of 'the system which may result, if not provided, from an increase of the pressure of air supplied from an air source.
  • a still further object of the present invention is to provide the forced draft cooling system of the above character wherein means is provided for supplying'the substantially whole amount of air to the surrounding of the exhaust gas purifyingdevice without permitting the flow of air to the interior of the purifying device depending upon the engine condition.
  • A-still further object of the present invention is to provide the forced draft cooling system of the above character wherein means is provided for supplying the air to the surroundingof the exhaust gas purifying device in response to the temperature of the engine or the exhaust system of the engine.
  • a still further object of the present invention is to provide the forced draft cooling system of the above character wherein means is provided for preventing the backflow' of air to be supplied to the surrounding of the exhaust gas purifying device and/or a portion of the exhaust gas leaking through the purifying device from flowing ,to the air source throughvarious components of the system.
  • I 1 v i I A still further object of the present invention is to provide the forced draft cooling system of the above character wherein meansis provided for controlling the flow of air to the interior of the exhaust gas purifying device in response to the engine condition.
  • the system herein provided can be advantageously employed in connection with any type of exhaust gas purifying devices such as thermal reactor, catalitic converter and exhaust gas recirculation system, although application thereof in connection with the thermal reactor exhibits the optimum results.
  • FIG. 2 is a schematic block diagram of a forced draft cooling system for cooling a thermal reactor in one embodimentof the present invention
  • FIG. 3 is a schematic block diagram of the forced draft cooling system in another embodiment
  • FIG. 9 is a graph showing the performance of the system of the present invention.
  • FIG. 10 is a schematic block diagram of the system in a further embodiment
  • FIG. 11 is a schematic diagram showing a structure of one valve device employed in the system of FIG. 10,
  • FIG. 12 is a schematic block diagram of the system in a still further embodiment
  • FIG. 13 is a schematic diagram showing a structure of one valve device employed in the system of FIG. 12,
  • an internal combustion engine 1 has a plurality of combustion chambers (not shown) in which combustion of a fuel-air mixture fed from a carburetor Zthrough an intake passage 3 takes place in sequence.
  • a primary air used to form the fuelair mixture in the carburetor 2 is adapted to be fed from a suitable air source such as air cleaner 4 and an exhaust gas produced upon combustion of the fuel-air mixture in the combustion chambers is adapted to be exhausted to the atmosphere through a thermal reactor
  • FIG. 4 through FIG. 8 are each a graph showing the timing of operation of various valving devices employed in the system, except for FIG. 5 which is a graph showing a performance character of the system of FIG.
  • the thermal reactor 5 employed adaptable in the forced draft cooling system throughout the preferred embodiments of the present invention basically comprises a shell 6 defining therein a reaction chamber 7 for burning noxious compounds present in the exhaust gas which has been fed from the engine combustion chambers through an exhaust passage 8.
  • This shell 6 is surrounded by a double-walled casing 9 which constitutes a cooling air jacket 10 therebetween, the operation of which will be mentioned later.
  • the doublewalled casing 9 has outer and inner wall members with a spacing formed therebetween in which a suitable heat insulating material 11 is packed.
  • an outlet passage 12 through which the air having circulated in the cooling air jacket 10 is exhausted to-theatmosphere may be connected with an exhaust conduit (not shown) through which the exhaust gas having passed throughthe thermal reactor 5 is exhausted to the atmosphere.
  • the forced draft cooling system for forcibly cooling the thermal reactor 5 basically comprises an air pump 13 having a suction port 13a connected with the air cleaner 4 and a discharge port 13b connected concurrently with a secondary air supply means for supplying a fresh air to the exhaust passage 8 and then to the reaction chamber 7 to cause the exhaust gas to be reburned and with means for supplying the air therefrom to the cooling air jacket 10 to effect the reduction of the temperature of the shell 6 of the reactor 5.
  • the second mentioned means may be connected with a different air pump independent of the pump 13 as can be easily anticipated by thoseskilled in the art. However, in view of the engine room of an automotive vehicle limited in space and economy, the concurrent use of the single pump 13 for the both means is preferable.
  • the second mentioned means may be provided with a valving device for permiting the flow of the cooling air therethrough in response to the vehicle driving condition, such as shown in FIG. 2.
  • the cooling air supply means comprises a common passage 14, one end of which is connected with the discharge port 13b of the air pump 13 and the other end of which is connected with a first passage 15 and a second passage 16, the first passage being in turn connected with an intake passage 17a of a cooling air control device 17, an outlet passage 17b of said device 17 being connected with the air jacket 10 through a third passage 18, and the second passage 16 being in turn connected with a secondary air control device for controlling the flow of the fresh air therethrough to the exhaust passage 8 in response to the vehicle driving condition.
  • the secondary air control device includes a cut-off valve 19 operable in response to the driving condition of the engine 1 in'such a manner that said valve 19 can be brought into the open position during a period in which the engine speed is of a relatively lower value and into the closed position during a period in which the engine speed is of a relatively higher value, and a check valve 20 capable of permiting the flow of the air from the cut-out valve 19 to the exhaust passage 8 in proportion to the vehicle driving condition and concurrently preventing the exhaust gas in the exhaust passage 8 from flowing to the cut-outvalve 19.
  • the cooling air control device 17 may be a manually operated one, in which case it is necessary for the operator to handle the cooling air control device 17 only when. he realizes that the temperature of the shell 6 of the reactor 5 is considerably increased during the drive of his vehicle.
  • various methods can be contemplated, one of which is the provision of a temperature detector capable of operating the cooling air control device 17 in response to the temperature detected of theshell 6 of the reactor 5.
  • the cooling air control device 17 shown in FIG. 2 is replaced by a pair of parallely disposed metering valve 21 and positive relief valve 22 to enable the cooling air from the passage 15 to be supplied to the air jacket 10 in an amount proportional to the engine driving condition.
  • the metering valve 21 and the positive relief valve 22 are respectively provided with intake passages 21a and 22a, both connected with the first passage 15, and outlet passages 21b and 22b, both connected with the third passage 18.
  • the metering valve 21 acts to regulate the flow of the cooling air therethrough in response to the engine driving condition in such a manner that the amount of the cooling air passing therethrough in creases in proportion to the increase of the engine speed.
  • the positive relief valve 22 is designed such as to be brought into the open position only during a period in which the engine speed is of a relatively higher value for letting the substantial whole amount of the air from the air pump 13 flow to the air jacket 10 whereby no air can be substantially supplied to the exhaust passage 8 throughthe cut-off valve 19 and the check valve 20.
  • a relief valve 24 Disposed on a passage 23 connecting between the first passage 15 and the air cleaner 4 or the atmosphere is a relief valve 24 operable for discharging the air in the passages 14 and 15 to the atmosphere only when the pressure of the air present therein exceeds over a predetermined value thereby to prevent a possible destruction of various components of the cooling system of the present invention.
  • the air passing through the first passage 15 can be in part supplied to the air jacket 10 as a cooling air and in part to the atmosphere as an excess air, the amount of the cooling air, as defined by B, and the amount of the excess air, as defined by C, both increasing in proportion to the engine speed, whereas the amount of the air, as defined by A, passing through the second passage 16 to the reaction chamber 7 of the reactor 5 maintains a constant value.
  • FIG. 5 The advantage of the cooling system shown in FIG. 3 without the provision of the positive relief valve 22 which was supported by the experiment conducted in connection therewith is illustrated in FIG. 5 wherein the axis of abscissa represents the vehicle speed per hour while the axis of ordinate represents the temperature.
  • the curve X-T represents variations in the temperature of the shell 6 of the reactor of the construction substantially disclosed in the pending Patent application (now US. Pat. No. 3,665,711) hereinbefore recited and the curves X-Ta and X-Tb represent variations in the temperature detected respectively of the outer wall member of the casing 9 at a position adjacent to the engine and at a position opposite to the engine.
  • the positive relief valve22 is adapted to be brought into the open position when the engine is driven at 'a relatively higher rate so that substantially the whole amount of the air supplied from the discharge port 13b of the air pump 13 can be supplied to the air jacket 10 without the flow of air to the reaction chamber 7 through the second passage 16, maintenance of the flow of the secondary air to the reaction chamber at the substantially constant value can be stopped when the engine speed attains the value N, higher than the valueNoQAccordingly, after the engine speed has attained the value N the amount of the cooling air can be increased by the amount of air which would have been'supplied to the reaction chamber 7 if the positive relief valve 22 is in the closed position or no provision thereof is made, and substantially no air can be supplied to the reaction chamber 7 through the .second passage 16 and then the exhaust passage 8. This is advantageous in that, since no re-burning of the exhaust 'gas in the reaction chamber 7 takes place without the secondary air, unnecessary or aimless increase of the temperature of the reactor 5' can be prevented.
  • FIGS. 7 through 9 show that the relief valve 24 is first brought into the open position to discharge the excess air therethrough tothe atmosphere in an amount as defined by the area C when the engine speed is of the value N, and then the metering valve 21 is brought into the open position to supply the cooling air to the air jacket in an amount as defined by the area B when theengine speed attains the value N the positive relief valve 22 being adapted to be opened to limit the amount of the secondary air as delined by the area A when the engine speed increases to the value N
  • the graph of FIG. 8 shows that the metering valve 2!
  • the amount of the secondary air to be supplied can be reduced to the substantially constant value when the engine speed during the acceleration of the vehicle attains the value N," in which condition the pressureof the air discharged by the air pump 13 is of the value P sufficient enough to cause the relief valve 24 to discharge the excess air to the atmosphere therethrough and, on the other hand, the amount of the secondary air can be reduced to the substantially constant value when the engine speed during the deceleration of the vehicle is reduced to the value N, in which condition the pressure of the air discharged by the air pump 13 isof the value P, sufficient enough to close the relief valve 24.
  • the non-return valve 25 is constructed with a valving plate 25a disposed within the passage 18 and pivotably supported at its intermediate portion by a shaft 25b extending from a wall portion to the opposite wall portion of a tubing 18a which constitutes the passage 18.
  • the valving plate 25a may be of the oval shape, the smallest diameter thereof being substantially equal to the inner diameter of the tubing 18a, and is provided with a weight 256 at a portion of the peripheral edge of the surface thereof facing toward the cooling air jacket 10 so that the valving plate 25a can be pivoted under its own gravity to the closed position unless otherwise pressure acts on the opposite surfacethereof facing toward the metering valve 21 and the position relief valve 22.
  • the forced draft cooling system shown in FIG. 12 is such that the air to be used to cool the reactor 5 can be supplied to the air jacket 10 only when the temperature of the thermal reactor 5 exceeds over a predetermined value.
  • the cooling system of FIG. 12 is provided with a thermal valve assembly 26 including a choke valve 27 disposed on the passage 18 about one end thereof adjacent to the reactor 5, a diaphragm actuator 28 having first and second working chambers 28a and 28b and a diaphragm member 280, and a solenoid valve 29 including a thermosensor 29a.
  • the structure of this thermal valve assembly 26 which may be employed to achieve the objects of the present invention in an optimum result is illustrated in FIG. 13.
  • the choke valve 27 includes a valving plate 27a disposed within the passage 18 and rigidly connected at its intermediate portion with a shaft 27b extending across the diameter of a tubing 18a constituting the passage 18, one end of said shaft 27b being rotatably supported by a wall portion of the tubing 18a and the other end thereof being situated outside the passage 18, a lever 270 having one end rigidly connected with the end of the shaft 27b situated outside the passage 18.
  • the diaphragm actuator 28 has the first working chamber 28a communicated to the atmosphere through a small hole 28d and the second working chamber 28b, both chambers being partitioned by the diaphragm member having a small hole 28e communicating with the first working chamber 28a to the second working chamber 28b.
  • One surface of the diaphragm member 28c facing to the first working chamber 28a is rigidly connected with the adjacent end of a connecting rod 28f, the other end of which being connected with the other end of the lever 27c of the choke valve 27 so that the displacement of the diaphragm member28c causes the operation of the valving plate 27a.
  • This diaphragm member 28c is normally urged toward the first working chamber 28a by the action of a resilient member, for example a compression spring 28g disposed in the second working chamber 28b so that the choke valve 27 can be maintained in the open position.
  • the solenoid valve 29 is adapted to close and open the communication between the second working chamber 28b and the intake passage 3 depending upon the temperature detected by the thermo sensor 280.
  • the solenoid valve 29 can be brought into the closed position in which condition the communication between the working chamber 28b and the intake passage 3 is cutoff, when the temperature detected by the sensor 29 is of a relatively higher value and into the open position in which condition the communication therebetween is established, when the temperature detected by the sensor 29a is of a relatively lower value.
  • the thermo sensor 29a may be adapted to detect the temperature of any one of engine body, engine cooling medium, shell of the reactor 5, casing 9, and other elements affected by the heat of the'exhaust gas.
  • the arrangement shown in FIG. 12 is advantageous not only in that overfheating of the reactor shell 6 can be prevented with the result of substantial improvement of the durability of the reactor 5, but also in that an excessive reduction of the temperature within the reactor which has been necessitated to effect reburning of the exhaust gas can be eliminated.
  • the thermal valve assembly shown in FIG. 13 may be disposed such as shown in FIG. 14 in combination with the non-return valve 25 shown in FIGS. 10 and 11.
  • the choke valve 27 of the thermal valve assembly is disposed on the outlet passage 21b of the metering valve 21, wherefor even during a period in which the thermal valve assembly or the choke valve 27 is in the closed position due to the fact that the temperature detected by the thermo sensor 29a has not yet attained the predetermined value,*the cooling air can be supplied to the air jacket 10 through the positive relief valve 22 and then the non-return valve 25 so long as the engine speed is of the'higher value.
  • the present invention is advantageously employed in the cooling system shown in FIGS. 3, l0, l2 and 14.
  • the valve structure including the cut-out valve 19,'the check valve 20, the metering valve 21 and the positive relief valve 22 as hereinbefore described comprises a casing generally indicated by 30 having therein a first diaphragm chamber 31 communicated with the intake passage 3 through an opening 30a, a second diaphragm chamber 32 communicated with the atmospherethrough another opening 30b, a first working chamber 33 communicated with the passage 18 through a first port 300, a second working chamber 34 communicated through a second port 30d with the air cleaner 4 via the relief valve 24 and through a third port 30e with the air pump 13 via the passage 14, and a third working chamber 35 communicated through a fourth port 30f with the exhaust passage 8 via the passage 16, said openings 30a and 30b and said ports 300 through 30f being all formed in the casing 30.
  • the first and second diaphragm chambers 31 and 32 are partitioned by a diaphragm member 36 formed with a small hole 36a communicating therebetween.
  • a piston rod 38 Slidably'extending through a partition 37 partitioning between the second'diaphragm chamber 32 and the first working chamber 33 is a piston rod 38, one end of which is rigidly connected with the diaphragm member 36 and the other end is rigidly connected with a valve member 39 of the diameter slightly larger than that of the first working chamber 33 and, in the condition as shown in FIG. 15, partitioning between the first working chamber 33 and the second working chamber 34.
  • the valve member 39 is formed with a small hole 39a which may communicate between said working chambers 33 and 34.
  • valve member 39 is normally closed by an auxiliary valve member 40 slidably mounted on the piston rod 38 and urged to the valve member 39 by the action of a compression spring 41 disposed within the first working chamber 33around said piston rod 38.
  • the second and third chambers 34 and 35 are divided by a rigid member 42 formed with a hole 42a in alignment with the axis of the piston rod 38.
  • This rigid member 42 is provided with an anuular valve seat 42b for receivingthe valve member 39 when the latter is moved thereto.
  • the hole 420 is adapted to communicate therebetween and, however, is normally closed by avalve member'43 situated within the third working chamber 35 and normally urged toward the second working chamber 34 by the action 'of a compression spring 44.
  • valve member'39 can be seated against an annular valve seat, formed at 45, so as to close the first working chamber 33 as shown in FIG. 15.
  • a solenoid valve 46 operableby an electrical signal representative of the engine speed which has been fed from an engine speed detector 47' is disposed on the passage 48 connecting between the intake passage 3 andthe first diaphragm chamber 31. 1
  • valve structure operatesin the following manner.
  • the solenoid valve 46 has been operated by the detector 47 so as to permit the communication between the intake passage 3 and the: first diaphragm chamber 31, the air'present in the first diaphragm chamber 31 can be sucked into the passage 48 sothatthe piston rod 38 is moved to the left to establish I either of the conditions shown in FIG. or FIG, 16.
  • the condition of FIG. 15 is the case in which the relief valve 24 is in the open position and, therefore, the air supplied from the air pump 13 into the second working chamber 34 by means of the passage 14 escapes to the atmosphere.
  • the condition of FIG'. 16 is the case in which the relief valve 24 is in theclosed position and, therefore, the air.
  • the valve member 39 is, of course, seated against the valve seat 45 and, however, the portion of the air supplied to the air jacket 10 flows through the hole 390.
  • auxiliary valve member 40 is also moved to the right by the'compression spring 41 along with the rightward movement of-the piston rod 38. Accordingly, it will be clearly understood that the whole amount of air supplied from the air pump 13 intothe second working chamber 34 which has been completely communicated with the first working chamber 33 can be supplied to 12 the air jacket 10 through the port 300 unless otherwise the relief valve 24 is in the open position.
  • valve member 39 and the valve seat 421) constitutes the cut-off valve 19
  • the velve member 43 normally seated against the hole 42a of the rigid member 42 constitutes the check valve 20
  • the hole 39a of the valve member 39 and the auxiliary valvemember 40 constitutes the metering valve 21
  • the valve member 39 and the valve seat 45 constitutes the positive relief valve 22.
  • the forced draft cooling system for forcibly cooling the exhaust gas purifying device works, in a primitive form, to prevent the exhaust gas purifying device from being overheated, by supplying a cooling air to the purifying device in response to various drive conditions of the internal combustion engine and the vehicle mounted withsuch engine.
  • said air source includes an air pump adapted to be driven by said engine.
  • thermo valve adapted to control the flow of the cooling air'in response to the temperature of at least one of the engine and the exhaust system.
  • said secondary air supply means includes a secondary air controlling device for controlling the flow of the secondary air in response to the engine condition.
  • said secondary air supply means includes a secondary air controlling device for controlling the flow of the secondary air in response to an engine condition.
  • said secondary air controlling device comprises a series connected combination of a check valve and a cut-off valve capable of cutting off the communication between said air source and said check valve when the engine speed exceeds a predetermined value.
  • a forced draft cooling system adaptable in an exhaust gas purifying device including a thermal reactor for purifying noxious compounds present in an exhaust gas emitted from the exhaust system of an internal combustion engine, which comprises an air source, means connected with said air source for supplying air to said reactor, said reactor including a cooling air jacket surrounding a shell which defines therein a reaction chamber in which reduction of the amount of the noxious gas present in the exhaust gas can be effected by re-burning said noxious compounds, said air from said air source through said air supply means being supplied to said air jacket of said reactor as a cooling air for forcibly cooling said shell, means connected with said air source for supplying secondary air to said reaction chamber to enable the re-burning of said noxious compounds to take place in said reaction chamber, a cooling air control device included in said first mentioned means for controlling the flow of the cooling air in response to an engine condition, and a non-return valve connected in series with said cooling air control device between the latter and said air jacket for preventing the flow of air, thathas been passed through said control
  • a forced draft cooling system adaptable in an exhaust gas purifying device including a thermal reactor for purifying noxious compounds present inan exhaust gas emitted from the exhaust system of an internal combustion engine, which comprises an air source, means connected with said air source for supplying air to said reactor, said reactor including a cooling air jacket surrounding a shell which defines therein a reaction chamber in which reduction of the amount of the noxious gas present in the exhaust gas can be effected by re-burning said noxious compounds, said air from said air source through said air supply means being supplied to said air jacket of said reactor as a cooling air for forcibly cooling said shell, means connected with said air source for supplying secondary air to said reaction chamber to enable the re-burning of said noxious compounds to take place in said reaction chamber, a cooling air control device included in said first mentioned means for controlling the flow of the cooling air connected in series with said cooling air control device between the latter and said air jacket for controlling the flow of the cooling air therethrough in response to the temperature of at least one of the engine and the exhaust system.
  • a forced'draft cooling system adaptable in an 'exhaust gas purifying device including a thermal reactor for purifying noxiouscompounds present in an exhaust gas emitted from the exhaust system of an internal combustion engine, which comprises an air source, means connected with said air source for supplying air to said reactor, said reactor including a cooling air jacket surrounding a shell which defines therein a reaction chamber in which reduction of the amount of the noxious gas present in the exhaust gas can be effected by re-burning said noxious compounds, said air from said air source through said air supply means being supplied to said air jacket of said reactor as a cooling air for forcibly cooling said shell, means connected with said air source for supplying secondary air to-said reaction chamber to enable thereburning of said noxious compounds to take place in said reaction chamber, said first mentioned'mean's including a metering valve for controlling the flow of the air from the air source to the air jacket in response to the engine speed, a positive relief valve connected in parallel with said metering valve for permitting the substantially whole amount of air
  • said secondary air supply means includes a secondary air control device for controlling the flow of the secondary air therethrough in response to an engine condition.
  • a forced draft cooling system adaptable in an exhaust gas purifying device including a thermal reactor for purifying noxious compounds present in an exhaust gas emitted from the exhaust system of an internal combustion engine, which comprises an air source, means connected with said air source for supplying air to said reactor, said reactor including a cooling air jacket surrounding a shell which defines therein a reaction chamber in which reduction of the amount of the noxious gas present in the exhaust gas can be effected by re-burning said noxious compounds, said air from said air source through said air supply means being supplied to said air jacket of said reactor as a cooling air for forcibly cooling-said shell, means connected with said air source for supplying secondary air to said reaction chamber to enable the reburning of said noxious compounds to take place in said reaction chamber, said first mentioned means including a metering valve for controlling the flow of the air from the air source to the air jacket in response to the engine speed, a positive relief valve connected in parallel with said metering valve for permitting the substantially whole amount of air from the air source to-flow to the air
  • metering valve for permitting the substantially whole amount of air from the air source to flow to the air jacket when the engine speed exceeds a predetermined value
  • a non-return valve connected-between said parallely disposed metering valve and positive relief valve and said air jacket for preventing the flow of air, that has been passed through at least one of said metering valve and said positiverelief valve, from said air jacket to at least one of said metering valve and said positive relief valve while permittingthe flow of said air in the reverse direction.
  • thermo valve disposed between said metering valve and said positive relief valve and said non-return valve for controlling the flow of the cooling air therethrough in response to the temperatureof at least one of'the engine and the exhaust system, 7
  • a forced draft cooling system adaptable in an exhaust gas purifying device including a thermal reactor for purifying noxious compounds present in an exhaust gas emitted from the exhaust system of an internal combustion engine, which comprises an air source, means connected with said air source for supplying air to said reactor, said reactor including a cooling air jacket surrounding a shell which defines therein a reaction chamber in which reduction of theamount of the noxious gas present in the exhaust gas can be effected by re-burning said noxious compounds, said air from said air source through said air supply means being supplied to said air jacket of said reactor as a cooling air for forcibly cooling said shell, means connected with said air source for supplying secondary air to said reaction chamber to enable the reburning of said noxious compounds to take place in said reaction chamber, said first mentioned means including a metering valve for controlling the flow of the air from the air source to the air jacket in response to the engine speed and a positive relief valve connected in parallel with said metering valve for permitting the substantially whole amount of air from the air source to flow to the air jacket when
  • said secondary air supply means includes a secondary air control device for controlling the flow of the secondary air therethrough in response to an engine condition.
  • a forced draft cooling system adaptable in an exhaust gas purifying device including a thermal reactor for purifying noxious compounds present in an exhaust gas emitted from the exhaust system of an internal combustion engine, which comprises an ,air source, means connected with said air source for supplying air to said reactor, said reactor including a cooling air jacket surrounding a shell which defines therein a reaction chamber in which reduction of the amount of the noxious gas present in the exhaust gas can be effected by re-burning said noxious compounds, said .air from said air source through said air supply means being supplied to said air jacket of said reactor as a cooling air for forcibly cooling said shell, means connected with said air source for supplying secondary air to said reaction chamber to enable the.
  • said first mentioned means including a metering valve for. controlling the flow of the air from the air source to the air jacket in response to the engine speed and a positive relief valve connected in parallel with said metering valve for permitting the substantially whole amount of air from the air source to flow to the air jacket when the passed through at least one of said metering valve and said positive relief valve, from said air jacket to at least one of said metering valve and said positive relief valve while permitting the flow of said air in the reverse direction, a thermo valve disposed between said pair of parallely disposed metering valve and positive relief valve and said non-return valve for controlling the flow of the cooling air therethrough in response to the temperature of at least one of the engine and the exhaust system, and a relief valve disposed on the connection between said air source and the atmosphere for exhausting the air to the atmosphere when the pressure of said air supplied from said air source exceeds a predetermined value.
  • said secondary air supply means includes a secondary air control device for controlling the flow of the secondary air therethrough in response to an engine condition.
  • a forced draft cooling system adaptable in an exhaust gas purifying device including a thermal reactor for purifying noxious compounds present in an exhaust gas emitted from the exhaust system of an internal combustion engine, which comprises an air source,
  • said reactor including a cooling air jacket surrounding a shell which defines therein a reaction chamber in which reduction of the amount of the noxious gas present in the exhaust gas can be effected by re-burning said noxious compounds, said air from said air source through said air supply means being supplied to said air jacket of said reactor as a cooling air for forcibly cooling said shell, means connected with said air source for supplying secondary air to said reaction chamber to enable the re-burning of said noxious compounds to take place in said reaction chamber, said first mentioned means including a metering valve for controlling the flow of the air from the air source to the air jacket in response to the engine speed and a positive relief valve connected in parallel with said metering valve for permitting the substantially whole amount of air from the air source to flow to the airjacket when the engine speed exceeds a predetermined value, a nonreturn valve connected between a pair of parallely disposed metering valve and positive relief valve and said air jacket for preventing the fiow of air, that
  • An exhaust gas purifying installation for an internal combustion engine comprising:
  • a thermal reactor including a cooling air jacket surrounding a shell which defines therein a reaction chamber in which reduction of the amount of noxious compounds present in the exhaust gas can be effected by re-burning said exhaust gas,
  • cooling air line means connected between said air source and said cooling air jacket for supplying cooling air to said cooling air jacket
  • cooling air control means interposed in said cooling air line means for controlling the amount of cooling air supplied to said cooling air jacket
  • said cooling air control means including a cooling air control device for controlling the flow of cooling air in said cooling air line means as a function of an engine operating condition and a thermo valve connected in series with and between said cooling air control device and said cooling air jacket, said thermo valve including means for controlling the flow of coolingair therethrough as a function of the temperature of at least one of the engine and the exhaust system of the engine.
  • An exhaust gas purifying installation for an internal combustion engine comprising:
  • a thermal reactor including a cooling air jacket surrounding a shell which defines therein a reaction chamber in which reduction of the amount of noxious compounds present in the exhaust gas can be effected by re-burning said exhaust gas,
  • cooling air line means connected between said air source and said cooling air jacket for supplying cooling air to said cooling air jacket
  • cooling air control means includes a metering valve and a positive relief valve arranged in said cooling air line means in parallel flow relationship with one another,
  • said metering valve includesmeans for varying the flow of air therethrough as a function of at least one engine operating parameter, wherein said positive relief valve is closed at low engine speeds such that said metering valve effectively controls the cooling air flow to said cooling air jacket during low engine speed operation,
  • said positive relief v valve is opened in response to engine speeds above a predetermined value such that substantially the whole amount of cooling air supplied by the air source is supplied as cooling air to said cooling air jacket irrespective of the position of said metering valve, and v a non-return valve interposed between said cooling 'air jacket and said parallely disposed metering and positive relief valves for preventing the backflow of cooling air from said cooling air jacket to said metering and positive relief valves and said air source.
  • An exhaust gas purifying installation for an internal combustion engine comprising:
  • a thermal reactor including a cooling air jacket surrounding a shell which defines therein a reaction chamber in which reduction of the amount of noxious compounds present in the exhaust gas can be effected by re-burning said exhaust gas,
  • cooling air line means connected between said air source and said cooling air jacket for supplying cooling air tosaid cooling air jacket
  • cooling'air control means interposed in said cooling air line means for controlling the amount of cooling air supplied to said cooling air jacket, wherein said cooling air control means includes a metering valve and a positive relief valve arranged in said cooling air line means in parallel flow relationship with one another,
  • metering valve includes means for varying the flow of air therethrough as a function of at least one engine operating parameter, wherein said positive relief valve is closed at low engine speeds such that said metering valve effectively controls the cooling air flow to said cooling air jacket during I low engine speed operation,
  • said positive relief valve is opened in response to engine speeds above a predetermined value such that substantially the whole amount of cooling air supplied by the air source is supplied as cooling air to said cooling'air jacket irrespective o the position of said metering valve, and
  • thermo valve interposed between said cooling air jacket and said parallely disposed metering and positive relief values for controlling the flow of cooling air therethrough as a function of the temperature of at least one of the engine and the exhaust system of the engine.
  • thermo valve interposed between said non-return valve and said parallely disposed metering and positive relief valves for controlling the flow of cooling air therethrough as a function of the temperature of at least one of the engine and the exhaust system of theengine.
  • said secondary air supply means includes a secondary air controlling device for controlling the flow of the secondary air; in response to an engine condition.
  • said secondary air supply means includes a secondary air control device for controlling the flow of the secondary air therethrough in response to an engine condition.
  • valve, from said air jacket to of said metering valve and" Y should read as follows:

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
US00165463A 1970-07-24 1971-07-23 Forced draft cooling system for an exhaust gas purifying device Expired - Lifetime US3812673A (en)

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JP1970074007U JPS4719362Y1 (enrdf_load_stackoverflow) 1970-07-24 1970-07-24
JP1970077076U JPS4720966Y1 (enrdf_load_stackoverflow) 1970-07-31 1970-07-31
JP1970077075U JPS4720965Y1 (enrdf_load_stackoverflow) 1970-07-31 1970-07-31
JP7694270U JPS544566Y1 (enrdf_load_stackoverflow) 1970-07-31 1970-07-31
JP1970076943U JPS4719363Y1 (enrdf_load_stackoverflow) 1970-07-31 1970-07-31

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3903695A (en) * 1973-02-07 1975-09-09 Toyota Motor Co Ltd Exhaust gas purification system
US3908370A (en) * 1974-05-23 1975-09-30 Toyota Motor Co Ltd System for cleaning exhaust gases from an internal combustion engine
US3934413A (en) * 1974-07-05 1976-01-27 General Motors Corporation Air flow control unit for engine secondary air supply
US3967929A (en) * 1973-01-13 1976-07-06 Nissan Motor Co., Ltd. Exhaust gas purifying system
US3971212A (en) * 1974-02-07 1976-07-27 Toyota Jidosha Kogyo Kabushiki Kaisha Method of and an apparatus for purifying exhaust gases of an internal combustion engine
US3974651A (en) * 1973-05-19 1976-08-17 Nissan Motor Co., Ltd. Afterburning control of internal combustion engine exhaust gas
US3983697A (en) * 1974-01-16 1976-10-05 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas cleaning system for internal combustion engines
US4000615A (en) * 1974-01-23 1977-01-04 Deutsche Vergaser Gmbh & Co. Kommanditgesellschaft Control installation for the proportioning of a secondary air quantity for improvement of the combustion in internal combustion engines or the afterburning of the exhaust gases of internal combustion engines
US4027478A (en) * 1974-10-03 1977-06-07 Nissan Motor Co., Ltd. Multiple-cylinder internal combustion engine
US4044788A (en) * 1974-12-23 1977-08-30 Acf Industries, Incorporated Diaphragm actuated valves
US4052848A (en) * 1975-02-27 1977-10-11 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Anti-afterburn system
US4098078A (en) * 1973-02-12 1978-07-04 Pierre Alfred Laurent Process and apparatus for afterburning of combustible pollutants from an internal combustion engine
US4152893A (en) * 1977-01-06 1979-05-08 Toyota Jidosha Kogyo Kabushiki Kaisha Internal combustion engine secondary air control system
US4183212A (en) * 1976-06-15 1980-01-15 Nissan Motor Company, Limited Secondary air control in vehicle exhaust purification system
US4192141A (en) * 1977-05-02 1980-03-11 Toyota Jidosha Kegko Kabushiki Kaisha Exhaust gas purifying system for engines
US4277941A (en) * 1978-07-07 1981-07-14 Fiat Auto S.P.A. Device for the reduction of the emission of pollutant gases produced by internal combustion, spark-ignition, engines for motor vehicles
FR2723615A1 (fr) * 1994-08-12 1996-02-16 Peugeot Procede de refroidissement des gaz d'echappement d'un moteur a combustion interne muni d'un collecteur d'echappement a double paroi et dispositif pour la mise en oeuvre de ce procede
US5983628A (en) * 1998-01-29 1999-11-16 Chrysler Corporation System and method for controlling exhaust gas temperatures for increasing catalyst conversion of NOx emissions
US5987885A (en) * 1998-01-29 1999-11-23 Chrysler Corporation Combination catalytic converter and heat exchanger that maintains a catalyst substrate within an efficient operating temperature range for emmisions reduction

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9328663B2 (en) 2013-05-30 2016-05-03 General Electric Company Gas turbine engine and method of operating thereof
US9366184B2 (en) 2013-06-18 2016-06-14 General Electric Company Gas turbine engine and method of operating thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3248872A (en) * 1963-12-05 1966-05-03 Jacque C Morrell Apparatus and process for treatment of exhaust gases from internal combustion engines
US3430437A (en) * 1966-10-05 1969-03-04 Holley Carburetor Co Automotive exhaust emission system
US3591961A (en) * 1969-12-18 1971-07-13 Gen Motors Corp Air pump flow control valve for engine exhaust emission control system
US3611715A (en) * 1969-04-18 1971-10-12 Toyo Kogyo Co Device for controlling a secondary air supply in an exhaust gas purifying device
US3648455A (en) * 1969-04-02 1972-03-14 Toyo Kogyo Co System for purifying an exhaust gas from an internal combustion engine
US3665711A (en) * 1969-06-09 1972-05-30 Toyo Kogyo Co Exhaust gas purifying device for an internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3248872A (en) * 1963-12-05 1966-05-03 Jacque C Morrell Apparatus and process for treatment of exhaust gases from internal combustion engines
US3430437A (en) * 1966-10-05 1969-03-04 Holley Carburetor Co Automotive exhaust emission system
US3648455A (en) * 1969-04-02 1972-03-14 Toyo Kogyo Co System for purifying an exhaust gas from an internal combustion engine
US3611715A (en) * 1969-04-18 1971-10-12 Toyo Kogyo Co Device for controlling a secondary air supply in an exhaust gas purifying device
US3665711A (en) * 1969-06-09 1972-05-30 Toyo Kogyo Co Exhaust gas purifying device for an internal combustion engine
US3591961A (en) * 1969-12-18 1971-07-13 Gen Motors Corp Air pump flow control valve for engine exhaust emission control system

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967929A (en) * 1973-01-13 1976-07-06 Nissan Motor Co., Ltd. Exhaust gas purifying system
US3903695A (en) * 1973-02-07 1975-09-09 Toyota Motor Co Ltd Exhaust gas purification system
US4098078A (en) * 1973-02-12 1978-07-04 Pierre Alfred Laurent Process and apparatus for afterburning of combustible pollutants from an internal combustion engine
US3974651A (en) * 1973-05-19 1976-08-17 Nissan Motor Co., Ltd. Afterburning control of internal combustion engine exhaust gas
US3983697A (en) * 1974-01-16 1976-10-05 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas cleaning system for internal combustion engines
US4000615A (en) * 1974-01-23 1977-01-04 Deutsche Vergaser Gmbh & Co. Kommanditgesellschaft Control installation for the proportioning of a secondary air quantity for improvement of the combustion in internal combustion engines or the afterburning of the exhaust gases of internal combustion engines
US3971212A (en) * 1974-02-07 1976-07-27 Toyota Jidosha Kogyo Kabushiki Kaisha Method of and an apparatus for purifying exhaust gases of an internal combustion engine
US3908370A (en) * 1974-05-23 1975-09-30 Toyota Motor Co Ltd System for cleaning exhaust gases from an internal combustion engine
US3934413A (en) * 1974-07-05 1976-01-27 General Motors Corporation Air flow control unit for engine secondary air supply
US4027478A (en) * 1974-10-03 1977-06-07 Nissan Motor Co., Ltd. Multiple-cylinder internal combustion engine
US4044788A (en) * 1974-12-23 1977-08-30 Acf Industries, Incorporated Diaphragm actuated valves
US4052848A (en) * 1975-02-27 1977-10-11 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Anti-afterburn system
US4183212A (en) * 1976-06-15 1980-01-15 Nissan Motor Company, Limited Secondary air control in vehicle exhaust purification system
US4152893A (en) * 1977-01-06 1979-05-08 Toyota Jidosha Kogyo Kabushiki Kaisha Internal combustion engine secondary air control system
US4192141A (en) * 1977-05-02 1980-03-11 Toyota Jidosha Kegko Kabushiki Kaisha Exhaust gas purifying system for engines
US4277941A (en) * 1978-07-07 1981-07-14 Fiat Auto S.P.A. Device for the reduction of the emission of pollutant gases produced by internal combustion, spark-ignition, engines for motor vehicles
FR2723615A1 (fr) * 1994-08-12 1996-02-16 Peugeot Procede de refroidissement des gaz d'echappement d'un moteur a combustion interne muni d'un collecteur d'echappement a double paroi et dispositif pour la mise en oeuvre de ce procede
US5983628A (en) * 1998-01-29 1999-11-16 Chrysler Corporation System and method for controlling exhaust gas temperatures for increasing catalyst conversion of NOx emissions
US5987885A (en) * 1998-01-29 1999-11-23 Chrysler Corporation Combination catalytic converter and heat exchanger that maintains a catalyst substrate within an efficient operating temperature range for emmisions reduction

Also Published As

Publication number Publication date
DE2137025A1 (de) 1972-01-27
GB1355267A (en) 1974-06-05
FR2103293A5 (enrdf_load_stackoverflow) 1972-04-07
DE2137025B2 (de) 1976-01-22

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