CN115306516A - Engine capable of reducing emission of nitrogen oxides - Google Patents

Engine capable of reducing emission of nitrogen oxides Download PDF

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Publication number
CN115306516A
CN115306516A CN202211061871.5A CN202211061871A CN115306516A CN 115306516 A CN115306516 A CN 115306516A CN 202211061871 A CN202211061871 A CN 202211061871A CN 115306516 A CN115306516 A CN 115306516A
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CN
China
Prior art keywords
cavity
tail gas
main pipe
engine
gas treatment
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.)
Withdrawn
Application number
CN202211061871.5A
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Chinese (zh)
Inventor
李静
吴斌
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.)
Chongqing Dalong Yufeng Motorcycle Manufacturing Co ltd
Original Assignee
Chongqing Dalong Yufeng Motorcycle Manufacturing Co ltd
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Publication date
Application filed by Chongqing Dalong Yufeng Motorcycle Manufacturing Co ltd filed Critical Chongqing Dalong Yufeng Motorcycle Manufacturing Co ltd
Priority to CN202211061871.5A priority Critical patent/CN115306516A/en
Publication of CN115306516A publication Critical patent/CN115306516A/en
Withdrawn legal-status Critical Current

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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
    • F01N3/101—Three-way catalysts
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • 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
    • F01N3/28—Construction of catalytic reactors
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Materials Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The invention discloses an engine for reducing nitrogen oxide emission in the technical field of engine equipment, which comprises an exhaust manifold, wherein the top of the exhaust manifold is provided with a plurality of intake manifolds, one ends of the intake manifolds are communicated with the engine, and the other ends of the intake manifolds are communicated with the exhaust manifold; a piston cavity is arranged in the middle of the exhaust main pipe and is vertically matched with the side wall of the exhaust main pipe in a sliding manner; the piston cavity divides the upper part of the exhaust main pipe into a tail gas treatment cavity, and the piston cavity divides the lower part of the exhaust main pipe into a condensation cavity; a three-way catalyst is arranged in the tail gas treatment cavity and is fixedly connected with the tail gas treatment cavity; and a piston plate is arranged in the piston cavity, is positioned below the tail gas treatment cavity and is in vertical sliding fit with the side wall of the piston cavity. And carbon oxides discharged by the automobile flow into the tail gas treatment cavity from each air inlet manifold, and a three-way catalyst in the tail gas treatment cavity purifies nitrogen oxides.

Description

Engine capable of reducing emission of nitrogen oxides
Technical Field
The invention belongs to the technical field of engine equipment, and particularly relates to an engine capable of reducing emission of nitrogen oxides.
Background
Harmful emissions from engines are a major source of air pollution, and as the importance of environmental protection issues increases, the goal of reducing harmful emissions from engines is becoming an important direction in the development of engines in the world today. With the worldwide oil consumption increasing year by year and the international oil price being high, the economy of diesel vehicles is highlighted, which makes the diesel engine occupy more and more important position in vehicle power. Therefore, the development of a method for controlling harmful emissions from diesel engines is a primary task for designers of diesel engines. An exhaust gas recirculation system is one that recirculates a small portion of the exhaust gas produced by a diesel engine back into the cylinders. The recirculated exhaust gas will retard the combustion process due to its inertness, i.e. the combustion speed will be slowed down resulting in a slow pressure build-up process in the combustion chamber, which is the main reason for the reduction of nitrogen oxides. In addition, increasing the exhaust gas recirculation rate will reduce the total exhaust flow and therefore the total pollutant output in the exhaust emissions will be relatively reduced. Under the working condition of medium speed, the engine needs larger exhaust gas recirculation rate to reduce exhaust temperature and pollution; at high speed conditions, the engine requires a smaller exhaust gas recirculation rate to improve engine dynamics.
In the prior art, various purification devices are installed in an exhaust system of an automobile, and nitrogen oxides in automobile exhaust are changed into non-toxic gases from original toxic gases by adopting physical and chemical methods and then are discharged into the atmosphere, so that the pollution of pollutants discharged by the automobile to the atmospheric environment can be reduced.
Disclosure of Invention
In order to solve the above problems, it is an object of the present invention to provide an engine capable of emitting nitrogen oxides with an increased reaction time of nitrogen oxides with a purification device.
In order to achieve the purpose, the technical scheme of the invention is as follows: the system comprises a steam exhaust main pipe, wherein the steam exhaust main pipe is provided with a plurality of air inlet manifolds, one ends of the air inlet manifolds are communicated with an engine, and the other ends of the air inlet manifolds are communicated with the steam exhaust main pipe; a piston cavity is arranged in the middle of the exhaust main pipe and is vertically matched with the side wall of the exhaust main pipe in a sliding manner; the piston cavity divides the upper part of the exhaust main pipe into a tail gas treatment cavity, and the piston cavity divides the lower part of the exhaust main pipe into a condensation cavity; a three-way catalyst is arranged in the tail gas treatment cavity and is fixedly connected with the tail gas treatment cavity; and a piston plate is arranged in the piston cavity, is positioned below the tail gas treatment cavity, and is in vertical sliding fit with the side wall of the piston cavity.
After the scheme is adopted, the following beneficial effects are realized: the piston cavity is used as a measuring cavity, and because the pressure in the piston cavity is unchanged and the external pressure is in a changing state, when carbon oxides discharged by the automobile flow into the tail gas treatment cavity from each air inlet manifold, a three-way catalyst in the tail gas treatment cavity purifies nitrogen oxides; meanwhile, the nitrogen oxides flow into the tail gas treatment cavity from each air inlet manifold, when the nitrogen oxides reach a certain amount, the nitrogen oxides can push the piston plate to move downwards, and when the piston plate can not move downwards any more due to the unchanged pressure intensity in the piston cavity, the nitrogen oxides can continuously flow into the tail gas treatment cavity, push the whole piston cavity to move downwards and expose a tail gas discharge port; because when nitrogen oxide promoted piston plate and piston chamber, need certain time, and in this period of time, the three way catalyst converter still is carrying out purification treatment to the nitrogen oxide that is located the tail gas treatment intracavity, until exposing the exhaust vent, great increase the reaction time of nitrogen oxide and three way catalyst converter, make nitrogen oxide purification more abundant.
Furthermore, one end of the three-way catalytic converter is provided with an air inlet, the other end of the three-way catalytic converter is provided with an air outlet, and the three-way catalytic converter is internally provided with a three-way catalyst.
Has the advantages that: the carbon oxide enters from the air inlet, the three-way catalyst is used for purifying the carbon oxide, and the purified carbon oxide flows out from the air outlet; the three-way catalyst enhances the activity of the carbon oxide, and promotes the carbon oxide to perform certain oxidation and reduction chemical reactions, so that CO in the carbon oxide is oxidized into colorless and nontoxic carbon dioxide gas; oxidation of HC compounds to water and carbon dioxide; NO x Reducing into nitrogen and oxygen to make three harmful gases become harmless gases, its purification efficiency is very high, three-way catalyst can be used for purificationMore than 90% of harmful substances.
Furthermore, a condensing agent is arranged in the condensing cavity.
Has the advantages that: the condensing agent can exchange heat for the piston cavity and the piston plate, so that the carbon oxides are subjected to heat exchange and temperature reduction.
Further, condensation chamber roof and diapire all are provided with the spout, all be provided with in the spout with spout sliding fit's first slider and second slider, all be provided with the connecting rod between first slider and the second slider, the one end and the first slider lateral wall fixed connection of connecting rod, the other end of connecting rod and the lateral wall fixed connection of second slider.
Has the beneficial effects that: the first sliding block and the second sliding block can drive the push rod to slide in the sliding groove.
Furthermore, the condensation intracavity is provided with the push rod, and the one end of push rod is articulated with the connecting rod that is located the condensation chamber roof, and the other end of push rod is articulated with the connecting rod that is located the condensation chamber diapire.
Has the beneficial effects that: when the carbon oxides push the piston cavity to move downwards, the piston cavity extrudes the condensation cavity, two ends of a push rod in the condensation cavity slide in opposite directions under the pressure action of the piston cavity, the space in the condensation cavity is reduced due to certain degree of offset of the push rod, the density between condensing agents is higher, the condensing agent positioned at the top of the condensation cavity clings to the top wall of the condensation cavity, the condensing agent can exchange heat with the piston cavity more quickly, and therefore heat exchange and cooling are carried out on the carbon oxides; when the engine stopped working, carbon oxide was not discharged, and the pressure of carbon oxide was lost in the piston chamber to make the condensation chamber lose the pressure in piston chamber, the condensing agent density in the condensation chamber diminishes, and the condensing agent motion accelerates, promotes the push rod and slides, and the space grow gradually in the condensation chamber promotes piston chamber rebound, makes the piston chamber reset, carries out the shutoff to tail gas discharge port.
Further, be provided with exhaust emission port on the lateral wall of steam extraction main along vertical direction, exhaust emission port department is provided with the valve, valve and exhaust emission port fixed connection, and exhaust emission port is located condensation chamber top.
Has the advantages that: when the purification of the carbon oxide is finished, opening a valve, and discharging the carbon oxide from the tail gas discharge port; the tail gas discharge port is located the condensation chamber top, and the condensate in the condensation chamber can not spill over.
Further, 1R can be used as condensing agent 4 0 4 A refrigerant.
Has the advantages that: r is 4 0 4 A is a non-azeotropic refrigerant containing no chlorine, which is colorless gas at normal temperature and pressure and is compressed liquefied gas stored in a steel cylinder; its ODP is 0 2 Thus R 4 0 4 A is an environment-friendly refrigerant which does not damage the atmospheric ozone layer; r 4 0 4 The A has the characteristics of cleanness, low toxicity, non-combustibility, good refrigeration effect and the like.
Drawings
FIG. 1 is a front view of an embodiment of the present invention.
FIG. 2 is a top view of a bottom plate of a condensation chamber according to an embodiment of the present invention.
Fig. 3 is a front view of the three-way catalyst of the embodiment of the invention.
Fig. 4 is a front view of an engine according to an embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises an air inlet manifold 1, a tail gas treatment cavity 2, a piston cavity 3, a condensation cavity 4, a piston plate 5, a push rod 6, a sliding groove 7, a sliding block 8, a connecting rod 9, a tail gas discharge port 10, a three-way catalyst 11 and a steam exhaust main pipe 12.
The embodiments are substantially as shown in figures 1, 2, 3 and 4 of the accompanying drawings:
an engine for reducing nitrogen oxide emission comprises a main exhaust pipe 12, wherein the top of the main exhaust pipe 12 is provided with a plurality of intake manifolds 1, and the intake manifolds 1 are communicated with a tail gas treatment cavity 2; one end of the intake manifold 1 is communicated with an engine, and the other end of the intake manifold 1 is communicated with a steam exhaust main pipe 12; a piston cavity 3 is arranged in the middle of the exhaust main pipe 12, and the piston cavity 3 is vertically matched with the side wall of the exhaust main pipe 12 in a sliding manner; the piston cavity 3 divides the upper part of the exhaust main pipe 12 into a tail gas treatment cavity 2, and the piston cavity 3 divides the lower part of the exhaust main pipe 12 into a condensation cavity 4; a three-way catalyst 11 is arranged in the tail gas treatment cavity 2, and the three-way catalyst 11 is fixedly connected with the tail gas treatment cavity 2.
Be provided with piston plate 5 in the piston chamber 3, piston plate 5 is located tail gas treatment chamber 2 below, piston plate 5 and the vertical sliding fit of 3 lateral walls in piston chamber.
A condensing agent and a push rod 6 are arranged in the condensing cavity 4; the top wall and the bottom wall of the condensation cavity 4 are both provided with a sliding chute 7, a first sliding block 8 and a second sliding block 8 which are in sliding fit with the sliding chute 7 are both arranged in the sliding chute 7, a connecting rod 9 is arranged between the first sliding block 8 and the second sliding block 8, one end of the connecting rod 9 is fixedly connected with the side wall of the first sliding block 8, and the other end of the connecting rod 9 is fixedly connected with the side wall of the second sliding block 8; one end of the push rod 6 is hinged with a connecting rod 9 positioned on the top wall of the condensation chamber 4, and the other end of the push rod 6 is hinged with the connecting rod 9 positioned on the bottom wall of the condensation chamber 4.
A tail gas discharge port 10 is arranged on the side wall of the exhaust main pipe 12 in the vertical direction, a valve is arranged at the tail gas discharge port 10 and fixedly connected with the tail gas discharge port 10, and the tail gas discharge port 10 is positioned above the condensation cavity 4; the condensing agent can be R 4 0 4 A refrigerant.
The specific implementation process is as follows:
the piston cavity 3 is used as a measuring cavity, and because the pressure in the cavity is unchanged and the external pressure is in a changing state, when carbon oxides discharged by the automobile flow into the tail gas treatment cavity 2 from each air inlet manifold 1, the three-way catalyst 11 in the tail gas treatment cavity 2 purifies nitrogen oxides; the carbon oxide enters from the air inlet, the three-way catalyst is used for purifying the carbon oxide, and the purified carbon oxide flows out from the air outlet; the three-way catalyst enhances the activity of the carbon oxide, and promotes the carbon oxide to perform certain oxidation and reduction chemical reactions, so that CO in the carbon oxide is oxidized into colorless and nontoxic carbon dioxide gas; oxidation of HC compounds to water and carbon dioxide; the NOx is reduced into nitrogen and oxygen, so that three harmful gases are changed into harmless gases.
Meanwhile, nitrogen oxides flow into the tail gas treatment cavity 2 from each air inlet manifold 1, when the nitrogen oxides reach a certain amount, the nitrogen oxides can push the piston plate 5 to move downwards, and when the piston plate 5 cannot move downwards any more due to the unchanged pressure intensity in the piston cavity 3, the nitrogen oxides continuously flow into the tail gas treatment cavity 2, push the piston cavity 3 to integrally move downwards and expose the tail gas discharge port 10; since a certain time is required while the nitrogen oxides push the piston plate 5 and the piston chamber 3, the three-way catalyst 11 still purifies the nitrogen oxides in the exhaust gas treatment chamber 2 until the exhaust gas discharge port 10 is exposed, and the carbon oxides are discharged from the exhaust gas discharge port 10.
When the oxycarbide pushes the piston cavity 3 to move downwards, the piston cavity 3 extrudes the condensation cavity, the two ends of the push rod 6 in the condensation cavity 4 slide in opposite directions respectively under the pressure action of the piston cavity 3, the push rod 6 deflects to a certain degree, so that the space in the condensation cavity 4 is reduced, the density between condensing agents is higher, the condensing agent at the top of the condensation cavity 4 tightly clings to the top wall of the condensation cavity 4, the condensing agent can more quickly exchange heat for the piston cavity 3, and the oxycarbide is subjected to heat exchange and cooling; when the engine stop operation, the oxycarbide is not discharged, and piston chamber 3 loses the pressure of oxycarbide to make condensation chamber 4 lose the pressure of piston chamber 3, the condensing agent density in the condensation chamber 4 diminishes, and the condensing agent motion is accelerated, thereby promotes push rod 6 and slides, and makes the space in the condensation chamber 4 grow gradually, promotes piston chamber 3 rebound, makes piston chamber 3 reset, carries out the shutoff to tail gas exhaust port 10.
The condensing agent can be R 4 0 4 A, a refrigerant; r 4 0 4 A is a non-azeotropic refrigerant containing no chlorine, which is colorless gas at normal temperature and pressure and is compressed liquefied gas stored in a steel cylinder; its ODP is 0 2 Thus R 4 0 4 A is an environment-friendly refrigerant which does not damage the atmospheric ozone layer; r is 4 0 4 The A has the characteristics of cleanness, low toxicity, non-combustibility, good refrigeration effect and the like.
The foregoing are embodiments of the present invention and are not intended to limit the scope of the invention to the particular forms set forth in the specification, which are set forth in the claims below, but rather are to be construed as the full breadth and scope of the claims, as defined by the appended claims, as defined in the appended claims, in order to provide a thorough understanding of the present invention. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (7)

1. An engine for reducing nitrogen oxide emissions, comprising: the system comprises a steam exhaust main pipe, wherein the top of the steam exhaust main pipe is provided with a plurality of air inlet manifolds, one ends of the air inlet manifolds are communicated with an engine, and the other ends of the air inlet manifolds are communicated with the steam exhaust main pipe; a piston cavity is arranged in the middle of the exhaust main pipe and is in vertical sliding fit with the side wall of the exhaust main pipe; the piston cavity divides the upper part of the exhaust main pipe into a tail gas treatment cavity, and the piston cavity divides the lower part of the exhaust main pipe into a condensation cavity; a three-way catalyst is arranged in the tail gas treatment cavity and is fixedly connected with the tail gas treatment cavity; and a piston plate is arranged in the piston cavity, is positioned below the tail gas treatment cavity and is in vertical sliding fit with the side wall of the piston cavity.
2. The engine for reducing nitrogen oxide emissions according to claim 1, wherein: one end of the three-way catalyst is provided with an air inlet, the other end of the three-way catalyst is provided with an air outlet, and the three-way catalyst is arranged in the three-way catalyst.
3. The engine for reducing nitrogen oxide emissions according to claim 2, wherein: and a condensing agent is arranged in the condensing cavity.
4. The engine for reducing nitrogen oxide emissions according to claim 3, wherein: condensation chamber roof and diapire all are provided with the spout, all be provided with in the spout with spout sliding fit's first slider and second slider, all be provided with the connecting rod between first slider and the second slider, the one end and the first slider lateral wall fixed connection of connecting rod, the other end of connecting rod and the lateral wall fixed connection of second slider.
5. The engine for reducing nitrogen oxide emissions according to claim 4, wherein: the condensation intracavity is provided with the push rod, and the one end of push rod is articulated with the connecting rod that is located the condensation chamber roof, and the other end of push rod is articulated with the connecting rod that is located the condensation chamber diapire.
6. The engine for reducing nitrogen oxide emissions according to claim 5, wherein: be provided with the exhaust vent on the lateral wall of exhaust main pipe vertical direction, exhaust vent department is provided with the valve, valve and exhaust vent fixed connection, and exhaust vent is located the condensation chamber top.
7. The engine for reducing nitrogen oxide emissions according to claim 6, wherein: the condensing agent can be R 4 0 4 A refrigerant.
CN202211061871.5A 2022-08-29 2022-08-29 Engine capable of reducing emission of nitrogen oxides Withdrawn CN115306516A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211061871.5A CN115306516A (en) 2022-08-29 2022-08-29 Engine capable of reducing emission of nitrogen oxides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211061871.5A CN115306516A (en) 2022-08-29 2022-08-29 Engine capable of reducing emission of nitrogen oxides

Publications (1)

Publication Number Publication Date
CN115306516A true CN115306516A (en) 2022-11-08

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Application Number Title Priority Date Filing Date
CN202211061871.5A Withdrawn CN115306516A (en) 2022-08-29 2022-08-29 Engine capable of reducing emission of nitrogen oxides

Country Status (1)

Country Link
CN (1) CN115306516A (en)

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Application publication date: 20221108

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