CN114151184A - Exhaust back pressure dynamic adjusting device and method and engine exhaust system - Google Patents
Exhaust back pressure dynamic adjusting device and method and engine exhaust system Download PDFInfo
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- CN114151184A CN114151184A CN202111374731.9A CN202111374731A CN114151184A CN 114151184 A CN114151184 A CN 114151184A CN 202111374731 A CN202111374731 A CN 202111374731A CN 114151184 A CN114151184 A CN 114151184A
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- engine
- exhaust
- air
- pipe body
- back pressure
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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
- 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
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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
- 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
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
- F02D9/06—Exhaust brakes
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- 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
Abstract
An exhaust back pressure dynamic regulation device, method and engine exhaust system, comprising: a mounting tube for connection with an exhaust port of an engine; the air inlet unit is connected with the mounting pipe body and is used for sending air flow into the mounting pipe body; and the flow guide unit is arranged in the installation pipe body, is communicated with the air inlet unit, is movably provided with an air outlet and is configured to send the airflow provided by the air inlet unit into the installation pipe body in the same/opposite flow direction of the tail gas in the installation pipe body. Because the air current that the air inlet unit sent into to the installation body can get into the installation body with the flow direction unanimous with the interior tail gas of installation body under the guide of gas outlet when passing through the water conservancy diversion unit, and then when the speed of sending into the air current was greater than the tail gas flow rate in the installation body, will improve the velocity of flow of tail gas after both mix, and then realize that tail gas can discharge fast, reduce the exhaust backpressure of the gas vent department of engine, finally effectively ensure the high-efficient use of engine.
Description
Technical Field
The application relates to the technical field of vehicle engines, in particular to an exhaust back pressure dynamic adjusting device and method and an engine exhaust system.
Background
The engine introduces the tail gas into the EGP through an exhaust pipe, and the exhaust pipe is of a hollow cylindrical structure. The trend, the length and the EGP carrier distribution of the exhaust pipe cause an exhaust back pressure generated by an exhaust system, and when the exhaust back pressure is higher, the dynamic property of the engine is obviously influenced, the fuel consumption rate of the engine is increased, and the economical efficiency of the engine is further influenced.
Disclosure of Invention
The embodiment of the application provides a dynamic exhaust back pressure adjusting device and method and an engine exhaust system, and aims to solve the problem that the performance of an engine is affected when the exhaust back pressure is large in the related art.
In a first aspect, a dynamic exhaust back pressure adjustment device is provided.
An exhaust back pressure dynamic adjustment device, comprising:
a mounting tube for connection with an exhaust port of an engine;
the air inlet unit is connected with the mounting pipe body and used for sending air flow into the mounting pipe body; and the number of the first and second groups,
and the flow guide unit is arranged in the installation pipe body, is communicated with the air inlet unit, is movably provided with an air outlet and is configured to convey the airflow provided by the air inlet unit into the installation pipe body in the same/opposite flow direction as the tail gas in the installation pipe body.
According to the scheme, when the airflow sent into the installation pipe body by the air inlet unit passes through the flow guide unit, the airflow can enter the installation pipe body in the same flow direction as tail gas in the installation pipe body under the guidance of the air outlet, and when the speed of the sent airflow is higher than the flow speed of the tail gas in the installation pipe body, the flow speed of the tail gas is increased after the sent airflow and the tail gas are mixed, so that the tail gas can be quickly discharged, the exhaust back pressure at the exhaust port of the engine is reduced, and the efficient use of the engine is effectively guaranteed finally;
in addition, when navigating mate needs the braking engine, the steerable gas outlet of this application activity to making its exhaust flow and installation body in tail gas flow direction opposite, and then this air current will further increase the exhaust back pressure of engine exhaust port department after getting into the installation body, can effectively cooperate the braking of engine this moment, make its can be faster carry out the deceleration and shut down, realize improving the emergency braking effect of adopting this application scheme back engine, have stronger actual meaning in the use of engine.
In some embodiments, the flow guide unit includes:
the guider is rotatably arranged in the mounting pipe body, a flow guide cavity communicated with the air inlet unit is arranged in the guider, and the air outlet is arranged at one side of the guider and communicated with the flow guide cavity and the mounting pipe body;
and the controller is connected with the guider and drives the guider to rotate so as to control the direction of the air outlet and the inside of the installation pipe body.
Through above-mentioned scheme, utilize the controller can drive the director and rotate, and then the gas outlet on the control director rotates to suitable position to change the flow direction of following the air current of water conservancy diversion chamber exhaust when getting into the installation pipe body, finally realize increasing or reducing the exhaust back pressure of engine as required.
In some embodiments, a rotating shaft is arranged at one end of the guider, penetrates through the mounting tube body and is connected with the controller;
the other end of the guider is provided with an air inlet pipe, the air inlet pipe is coaxial with the rotating shaft and communicated with the air inlet unit, and the air inlet unit and the rotating shaft are in rotating fit.
Through the scheme, the guider can be connected with the controller through the rotating shaft, and then the direction of the air outlet of the guider can be adjusted by means of the controller when needed, so that the flow direction of the gas sent into the installation pipe body by the flow guide unit can be changed; meanwhile, the other end of the guider is communicated with the air inlet unit and is connected with the air inlet unit in a rotating mode, the rotating axial direction is consistent with the rotating shaft, and the air flow feeding direction can be adjusted smoothly when the guider is communicated with the air inlet unit. The direction switching of the air outlet on the guider is changed into the rotation of the rotating shaft of the guider, so that the method is easy to realize, has lower structure and control cost, and is beneficial to actual production and use.
In some embodiments, the air intake unit includes:
a gas supply member;
and the two ends of the air inlet loop are respectively connected with the air supply part and the flow guide unit, and the air supply part and the installation pipe body are spirally wound.
Through above-mentioned scheme, the air current that the air feed spare was carried gets into in the installation body through the loop that admits air, simultaneously because the loop that admits air is the heliciform around establishing, the air current that makes the air feed spare carry can smoothly flow and obtain accelerating in the loop that admits air, and then forms quick air current and gets into in the installation body, realizes driving the tail gas in the installation body or hinders the tail gas flow in the installation body.
In some embodiments, the dynamic exhaust back pressure adjusting device further comprises:
and the regulating and controlling unit is in control connection with the flow guide unit and is used for controlling the flow direction of the air flow sent out from the air outlet.
Through above-mentioned scheme, realize the remote control of water conservancy diversion unit with the help of the regulation and control unit, and then this device can convenient and fast more when installing and using, does benefit to in-service use.
In some embodiments, the regulation and control unit is connected with a vehicle VECU system of the vehicle and configured to control the flow direction of the air flow sent out from the air outlet according to the opening degree of a brake pedal of the vehicle.
Through above-mentioned scheme, realize that the regulation and control unit can follow the attitude that acquires brake pedal in the whole car VECU system at any time, and then judge current driver's demand to the gas outlet orientation in the quick adjustment installation pipe body, and then realize reducing or increasing the exhaust backpressure of engine as required, realize the automatic use of this device, have stronger practical meaning.
In some embodiments, the dynamic exhaust back pressure adjusting device further comprises:
and the heat exchange unit is arranged in the mounting pipe body and is communicated with an exhaust manifold of the engine so as to be used for transferring the heat of the tail gas in the exhaust manifold of the engine into the mounting pipe body.
Through the scheme, the device can transfer the heat of high-temperature tail gas at the exhaust manifold of the engine into the installation pipe body while realizing the adjustment of the exhaust back pressure of the engine, so that the temperature of the tail gas of the installation pipe body is increased, the heated tail gas can react faster in the subsequent reduction treatment process, the subsequent temperature increase of the tail gas again is effectively reduced or avoided, and the heat of the engine is fully utilized; on the other hand, the heat dissipation of the engine to an external vehicle body structure can be effectively reduced, the control of the vehicle body temperature is facilitated, and other problems caused by overhigh vehicle body temperature are avoided.
In some embodiments, the exhaust manifold and the heat exchange unit are connected by an insulated pipe.
Through above-mentioned scheme, effectively reduce the heat of high temperature tail gas and disperse in the exhaust manifold, make it can the high efficiency with heat transfer to heat transfer unit department recycle, and then the tail gas in the guarantee installation pipe body can obtain better effect of heating and reduce the heat that the whole device dispels to the automobile body.
In a second aspect, the present application further provides a method for dynamically adjusting exhaust backpressure.
A dynamic regulation method for exhaust back pressure of an engine comprises the following steps:
acquiring a brake pedal opening degree signal;
if the opening signal of the brake pedal is equal to 0, sending airflow with the same flow direction as tail gas into an exhaust pipeline connected with the engine;
if the opening signal of the brake pedal is larger than 0, air flow with the flow direction opposite to that of tail gas is sent into an exhaust pipeline connected with the engine.
Through the scheme, the driving state of the automobile is judged by utilizing the opening state of the brake pedal, and the exhaust back pressure of the engine is controlled according to the driving state of the automobile so as to further match with the driving requirement of the current automobile and finally realize the remarkable improvement of the dynamic property and the braking capability of the engine.
In a third aspect, the present application further provides an engine exhaust system.
An engine exhaust system, comprising:
an engine;
an exhaust gas aftertreatment module;
an exhaust line connecting the engine and the exhaust aftertreatment module;
the dynamic exhaust back pressure regulating device is arranged on the exhaust pipeline.
Through the scheme, the system has a good exhaust effect when in use, can realize auxiliary braking on the engine, can effectively utilize heat generated by the engine, improves the treatment efficiency of the tail gas aftertreatment module, synchronously reduces the temperature rise effect on the whole vehicle body, and has a high energy-saving effect.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a dynamic exhaust back pressure adjusting device and method and an engine exhaust system, when air flow sent into an installation pipe body by an air inlet unit passes through a flow guide unit, the air flow can enter the installation pipe body in the same flow direction as tail gas in the installation pipe body under the guidance of an air outlet, and when the speed of the sent air flow is higher than the flow speed of the tail gas in the installation pipe body, the air flow and the tail gas are mixed to increase the flow speed of the tail gas, so that the tail gas can be rapidly discharged, the exhaust back pressure at an exhaust port of an engine is reduced, and the efficient use of the engine is effectively ensured; simultaneously, when navigating mate needs the braking engine, the steerable gas outlet of this application activity to making its exhaust flow and installation body in tail gas flow direction opposite, and then this air current will further increase the exhaust backpressure of engine exhaust port department after getting into the installation body, can effectively cooperate the braking of engine this moment, make its can be faster carry out the deceleration and shut down, realize improving the emergency braking effect of adopting this application scheme rear engine, have stronger actual meaning in the use of engine.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic overall view of a dynamic exhaust back pressure adjustment device according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural view of a guide provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of an engine exhaust system provided by an embodiment of the present application.
In the figure:
1. installing a pipe body;
2. an air intake unit; 20. a gas supply member; 21. an air intake circuit;
3. a flow guide unit; 30. a guide; 300. an air outlet; 301. a rotating shaft; 302. an air inlet pipe;
4. a regulatory unit;
5. a heat exchange unit;
6. an engine;
7. an exhaust line;
8. an exhaust back pressure dynamic adjusting device;
9. and a post-processing module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The engine introduces the tail gas into the EGP through an exhaust pipe, and the exhaust pipe is of a hollow cylindrical structure. The trend, the length and the EGP carrier distribution of the exhaust pipe cause an exhaust back pressure generated by an exhaust system, and when the exhaust back pressure is higher, the dynamic property of the engine is obviously influenced, the fuel consumption rate of the engine is increased, and the economical efficiency of the engine is further influenced.
Therefore, embodiments of the present application provide a dynamic exhaust back pressure adjustment device, a dynamic exhaust back pressure adjustment method, and an engine exhaust system to solve the above problems.
Referring to fig. 1, an exhaust back pressure dynamic adjustment device 8 includes:
mounting the pipe body 1 for connection with an exhaust port of an engine 6;
an air inlet unit 2 connected to the installation pipe body 1 for feeding an air flow into the installation pipe body 1; and the number of the first and second groups,
and the flow guide unit 3 is arranged in the installation pipe body 1, is communicated with the air inlet unit 2, is movably provided with an air outlet 300, and is configured to convey the airflow provided by the air inlet unit 2 into the installation pipe body 1 in the same/opposite flow direction of the tail gas in the installation pipe body 1.
Wherein, gas outlet 300 sets up in the one end of water conservancy diversion unit 3 in this embodiment, and water conservancy diversion unit 3 is the activity setting in installation body 1, and then realizes that gas outlet 300 can follow water conservancy diversion unit 3 synchronous motion to can send into the air current of different flow directions when realizing its orientation change and get into in the installation body 1.
In addition, in some embodiments, the flow guiding unit 3 may be fixedly installed in the installation pipe body 1, the air outlet 300 is provided with a plurality of air outlets and is distributed on two sides of the flow guiding unit 3, so as to have the air outlet 300 facing the same direction or the opposite direction of the tail gas in the installation pipe body 1, and the valve is movable on the air outlet 300, and then the opening and closing of the valves on the air outlets 300 on two sides are controlled and adjusted, so that the air flow can be sent into the exhaust pipe by controlling the flow guiding unit 3 in different flow directions.
In other embodiments, at least two sets of flow guiding units 3 may be provided, and the air outlets 300 of the two sets of flow guiding units 3 in the installation tube 1 are opposite to each other, so that when one set of flow guiding units 3 is opened, an air flow having the same/opposite direction as the tail gas flow can be fed into the installation tube 1.
With the arrangement, when the airflow sent into the installation pipe body 1 by the air inlet unit 2 passes through the flow guide unit 3, the airflow can enter the installation pipe body 1 in the same flow direction as the tail gas in the installation pipe body 1 under the guidance of the air outlet 300, and when the speed of the sent airflow is higher than the flow speed of the tail gas in the installation pipe body 1, the flow speed of the tail gas is increased after the sent airflow and the tail gas are mixed, so that the tail gas can be quickly discharged, the exhaust back pressure at the exhaust port of the engine 6 is reduced, and the efficient use of the engine 6 is effectively ensured finally;
in addition, when navigating mate needs braking engine 6, the steerable gas outlet 300 of this application is movable to making its exhaust flow and the installation body 1 interior tail gas flow direction opposite, and then this air current will further increase the exhaust back pressure of 6 gas vents departments of engine after getting into installation body 1, can effectively cooperate the braking of engine 6 this moment, make its can be faster slow down and shut down, realize improving the emergency braking effect who adopts engine 6 behind this application scheme, have stronger actual meaning in engine 6's the use.
Referring to fig. 1, optionally, the flow guide unit 3 includes:
a guide 30 rotatably disposed in the installation tube body 1, in which a guide chamber communicating with the air inlet unit 2 is disposed, and an air outlet 300 disposed at one side thereof and communicating the guide chamber with the installation tube body 1;
a controller (not shown) connected to the guide 30 and driving the guide 30 to rotate so as to control the orientation of the air outlet 300 and the inside of the mounting tube body 1.
Wherein, director 30 is the annular structure in this embodiment, and the middle part forms the center round hole that supplies the interior tail gas of installation body 1 to pass through fast, and the water conservancy diversion chamber is the annular chamber that matches director 30 to with the unit 2 intercommunication that admits air. The air outlet 300 is disposed on the annular end surface of one side of the guider 30, and then the guider 30 is rotated by the controller, so that the flow direction of the tail gas in the installation pipe body 1 can be adjusted by the air outlet 300 facing or facing away from the installation pipe body 1, and the air flow with the same/opposite flow direction as the tail gas can be sent into the installation pipe body 1. The controller is a driving motor capable of rotating in two directions in this embodiment, and the output shaft of the driving motor is connected to the guider 30, so as to control the air outlet 300 on one side of the guider 30 to rotate to different directions through the driving motor.
Meanwhile, in order to ensure that the air flow can be rapidly mixed with the tail gas or can sufficiently block the deceleration tail gas, the air outlet 300 is axially spaced at a plurality of positions on the end surface of one side of the guider 30.
Set up like this, can drive director 30 and rotate by the controller, and then the gas outlet 300 on the control director 30 rotates to suitable position to the flow direction of change from the air current of water conservancy diversion chamber exhaust when getting into installation body 1, the exhaust back pressure of the engine 6 that finally realizes increasing or reducing as required.
Referring to fig. 2, optionally, one end of the guide 30 is provided with a rotating shaft 301, and the rotating shaft 301 penetrates through the mounting tube 1 and is connected to the controller;
the other end of the guider 30 is provided with an air inlet pipe 302, the air inlet pipe 302 is coaxial with the rotating shaft 301, and is communicated with the air inlet unit 2 and is in rotating fit with the air inlet unit 2.
After the guider 30 is connected with a driving motor serving as a controller through the rotating shaft 301, the direction of an air outlet 300 of the guider 30 can be adjusted by the controller when needed, and further the flow direction of air sent into the installation pipe body 1 by the flow guide unit 3 is changed; meanwhile, the other end of the guider 30 is communicated with the air inlet unit 2 and is connected with the air inlet unit 2 in a rotating mode, and the direction of the rotating shaft 301 is consistent with that of the rotating shaft 301, so that the air flow feeding direction can be adjusted smoothly when the guider is communicated with the air inlet unit 2.
By the arrangement, the direction of the air outlet 300 on the guider 30 is changed into the rotation of the rotating shaft 301 of the guider 30, so that the device is easy to realize, has lower structure and control cost, and is beneficial to actual production and use.
Referring to fig. 1, alternatively, the intake unit 2 includes:
a gas supply member 20;
and the two ends of the air inlet loop 21 are respectively connected with the air supply part 20 and the flow guide unit 3, and the air supply part 20 and the installation pipe body 1 are spirally wound.
Wherein, air feed spare 20 selects the motor of breathing in this embodiment to the realization can directly be inhaled outside air and send into in the installation body 1, and then the guarantee cost is controllable. Meanwhile, in some embodiments, other forms, such as an air pump, etc., may be adopted, and the air flow source may be provided with an independent air source selectively, and different types of air may be compressed and filled in the air source as required to be delivered into the installation pipe body 1.
Set up like this, the air current that air feed spare 20 carried gets into installation body 1 in through the ring way 21 that admits air, simultaneously because the ring way 21 that admits air is the heliciform around establishing, the air current that makes air feed spare 20 carry can smoothly flow and obtain accelerating in the ring way 21 that admits air, and then forms quick air current and get into in installation body 1, realizes driving the tail gas in the installation body 1 or hinders the tail gas flow in the installation body 1.
Referring to fig. 1, optionally, the exhaust back pressure dynamic adjustment further comprises:
and the regulating and controlling unit 4 is in control connection with the flow guiding unit 3 and is used for controlling the flow direction of the airflow sent by the air outlet 300.
Wherein, the regulation and control unit 4 is electrically connected with the controller in the flow guide unit 3.
Set up like this, realize the remote control of water conservancy diversion unit 3 with the help of regulation and control unit 4, and then this device can convenient and fast more when installing and using, does benefit to in-service use.
Optionally, the control unit 4 is connected to an entire VECU system of the vehicle, and is configured to control a flow direction of the air flow sent by the air outlet 300 according to an opening degree of a brake pedal of the vehicle.
Set up like this, realize that regulation and control unit 4 can follow the attitude that acquires brake pedal in the whole car VECU system at any time, and then judge current driver's demand to gas outlet 300 orientation in the quick adjustment installation body 1, and then realize reducing or increasing engine 6's exhaust back pressure as required, realize the automatic use of this device, have stronger practical meaning.
Referring to fig. 1 and 3, optionally, the exhaust back pressure dynamic adjustment further comprises:
and the heat exchange unit 5 is arranged in the installation pipe body 1, is communicated with an exhaust manifold of the engine 6 and is used for transferring heat of tail gas sent by the exhaust manifold of the engine 6 into the installation pipe body 1.
Wherein, heat transfer unit 5 sets up in the low reaches of unit 2 that admits air in the heat transfer position on installation body 1, and then makes heat transfer unit 5 can carry out the heat transfer to the tail gas after the speed promotes, makes its tail gas that does not obtain the speed-raising for admitting air unit 2 upper reaches, has faster heat transfer speed, and then in order to realize improving the tail gas temperature in the installation body 1 rapidly to reduce calorific loss.
By the arrangement, when the exhaust back pressure of the engine 6 is adjusted, the device can transfer the heat of the high-temperature tail gas at the exhaust manifold of the engine 6 into the installation pipe body 1, so that the temperature of the tail gas of the installation pipe body 1 is increased, the increased tail gas can react faster in the subsequent reduction treatment process, the subsequent temperature increase of the tail gas again is effectively reduced or avoided, and the heat of the engine 6 is fully utilized; on the other hand, the heat dissipation of the engine 6 to an external vehicle body structure can be effectively reduced, so that the control of the vehicle body temperature is facilitated, and other problems caused by overhigh vehicle body temperature are avoided.
Referring to fig. 3, the exhaust manifold and the heat exchange unit 5 are connected by an insulated pipe.
Set up like this, effectively reduce the heat of high temperature tail gas and disperse in the exhaust manifold, make it can the efficient with heat transfer 5 departments of heat transfer unit recycle, and then the tail gas can obtain better effect of heating and reduce the heat that the integrated device dispels to the automobile body in the guarantee installation body 1.
The application provides an exhaust back pressure dynamic adjustment device 8's theory of operation and beneficial effect do:
when the airflow sent into the installation pipe body 1 by the air inlet unit 2 passes through the flow guide unit 3, the airflow can enter the installation pipe body 1 in the same flow direction as the tail gas in the installation pipe body 1 under the guidance of the air outlet 300, and then when the speed of the sent airflow is higher than the flow speed of the tail gas in the installation pipe body 1, the flow speed of the tail gas is increased after the sent airflow and the tail gas are mixed, so that the tail gas can be quickly discharged, the exhaust back pressure at the exhaust port of the engine 6 is reduced, and the efficient use of the engine 6 is effectively ensured finally; meanwhile, when a driver needs to brake the engine 6, the air outlet 300 can be controlled to move to enable the air flow discharged by the air outlet to be opposite to the flow direction of tail gas in the installation pipe body 1, and then the air flow further increases the exhaust back pressure at the exhaust port of the engine 6 after entering an exhaust pipeline, and the braking of the engine 6 can be effectively matched, so that the engine can be decelerated and stopped more quickly, the emergency braking effect of the engine 6 after the scheme is adopted is improved, and the method has stronger practical significance in the use process of the engine 6;
in addition, when the exhaust back pressure of the engine 6 is adjusted, the heat of high-temperature tail gas at the exhaust manifold of the engine 6 can be transferred into the installation pipe body 1, so that the temperature of the tail gas of the installation pipe body 1 is increased, the heated tail gas can react faster in the subsequent reduction treatment process, the subsequent temperature increase of the tail gas again is effectively reduced or avoided, and the heat of the engine 6 is fully utilized; on the other hand, the heat dissipation of the engine 6 to an external vehicle body structure can be effectively reduced, so that the control of the vehicle body temperature is facilitated, and other problems caused by overhigh vehicle body temperature are avoided.
In a second aspect, embodiments of the present application provide a method for dynamically adjusting exhaust back pressure.
A method of dynamic adjustment of exhaust backpressure comprising the steps of:
acquiring a brake pedal opening degree signal;
if the opening signal of the brake pedal is equal to 0, sending airflow with the same flow direction as tail gas into an exhaust pipeline 7 connected with the engine 6;
if the brake pedal opening signal is greater than 0, an air flow in a direction opposite to the exhaust gas is sent into an exhaust line 7 connected to the engine 6.
By means of the arrangement, the driving state of the automobile is judged by utilizing the opening state of the brake pedal, and the exhaust back pressure of the engine 6 is controlled according to the driving state of the automobile so as to further match with the current driving requirement of the automobile, and finally, the dynamic property and the braking capacity of the engine 6 are obviously improved.
Referring to fig. 3, in a third aspect, embodiments of the present application provide an engine 6 exhaust system comprising:
an engine 6;
an exhaust gas post-treatment module 9;
an exhaust line 7 connecting the engine 6 and the exhaust aftertreatment module 9;
the exhaust back pressure dynamic adjustment device 8 is provided in the exhaust line 7.
The exhaust gas post-treatment module 9 is used for treating the exhaust gas discharged by the engine 6 so as to meet the relevant national standard.
By the arrangement, the system has a good exhaust effect when in use, can realize auxiliary braking on the engine 6, can effectively utilize heat generated by the engine 6, improves the treatment efficiency of the tail gas aftertreatment module 9, synchronously reduces the temperature rise effect on the whole vehicle body, and has a high energy-saving effect.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An exhaust back pressure dynamic adjustment device, characterized in that it comprises:
a mounting tube (1) for connection with an exhaust port of an engine (6);
an air inlet unit (2) connected to the installation pipe body (1) for sending an air flow into the installation pipe body (1); and the number of the first and second groups,
and the flow guide unit (3) is arranged in the installation pipe body (1), is communicated with the air inlet unit (2), is movably provided with an air outlet (300), and is configured to convey the air flow provided by the air inlet unit (2) into the installation pipe body (1) in the same/opposite flow direction of the tail gas in the installation pipe body (1).
2. The dynamic exhaust back pressure regulating device according to claim 1, wherein the flow guide unit (3) comprises:
the guider (30) is rotatably arranged in the mounting tube body (1), a flow guide cavity communicated with the air inlet unit (2) is arranged in the guider, and the air outlet (300) is arranged at one side of the guider and communicated with the flow guide cavity and the mounting tube body (1);
and the controller is connected with the guider (30) and drives the guider (30) to rotate so as to control the direction of the air outlet (300) and the direction in the installation pipe body (1).
3. The dynamic exhaust back pressure adjusting apparatus according to claim 2,
one end of the guider (30) is provided with a rotating shaft (301), and the rotating shaft (301) penetrates through the mounting pipe body (1) and is connected with the controller;
the other end of the guider (30) is provided with an air inlet pipe (302), the air inlet pipe (302) is coaxial with the rotating shaft (301), and the air inlet pipe (302) is communicated with the air inlet unit (2) and is in running fit with the air inlet unit.
4. The dynamic exhaust back pressure adjustment device according to claim 1, wherein the intake unit (2) includes:
a gas supply member (20);
and the two ends of the air inlet loop (21) are respectively connected with the air supply part (20) and the flow guide unit (3), and the air supply part (20) and the installation pipe body (1) are spirally wound.
5. The dynamic exhaust back pressure adjustment device according to claim 1, further comprising:
and the regulating and controlling unit (4) is in control connection with the flow guide unit (3) and is used for controlling the flow direction of the airflow sent out from the air outlet (300).
6. The dynamic exhaust back pressure regulating device according to claim 5, wherein the regulating and controlling unit (4) is connected with a vehicle VECU system of a vehicle and is configured to control the flow direction of the air flow sent by the air outlet (300) according to the opening degree of a brake pedal of the vehicle.
7. The dynamic exhaust back pressure adjustment device according to claim 1, further comprising:
and the heat exchange unit (5) is arranged in the installation pipe body (1) and is communicated with an exhaust manifold of the engine (6) so as to transfer the heat of the tail gas sent by the exhaust manifold of the engine (6) into the installation pipe body (1).
8. The dynamic exhaust back pressure regulating device according to claim 7, wherein the exhaust manifold and the heat exchange unit (5) are connected by an insulated pipe.
9. A dynamic exhaust back pressure adjusting method is characterized by comprising the following steps:
acquiring a brake pedal opening degree signal;
if the opening signal of the brake pedal is equal to 0, sending airflow with the same flow direction as tail gas into an exhaust pipeline (7) connected with an engine (6);
if the opening signal of the brake pedal is larger than 0, air flow with the flow direction opposite to that of tail gas is sent into an exhaust pipeline (7) connected with an engine (6).
10. An engine (6) exhaust system, characterized in that it comprises:
an engine (6);
an exhaust gas aftertreatment module (9);
an exhaust line (7) connecting the engine (6) and the exhaust aftertreatment module (9);
the dynamic exhaust back pressure regulating device (8) as claimed in claims 1 to 8, provided on the exhaust line (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111374731.9A CN114151184B (en) | 2021-11-17 | 2021-11-17 | Dynamic exhaust back pressure adjusting device and method and engine exhaust system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111374731.9A CN114151184B (en) | 2021-11-17 | 2021-11-17 | Dynamic exhaust back pressure adjusting device and method and engine exhaust system |
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| CN114151184B CN114151184B (en) | 2023-03-28 |
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Citations (6)
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|---|---|---|---|---|
| JPH09112301A (en) * | 1995-10-13 | 1997-04-28 | Jidosha Kiki Co Ltd | Exhaust brake device |
| US20070240404A1 (en) * | 2006-04-18 | 2007-10-18 | Eric Pekrul | Engine Exhaust Systems with Secondary Air Injection Systems |
| US20120260626A1 (en) * | 2009-06-05 | 2012-10-18 | Anthony Colette | IC Power Plant and Method of Operation |
| US20140196454A1 (en) * | 2013-01-16 | 2014-07-17 | Ford Global Technologies, Llc | Method and system for catalyst temperature control |
| US20150292392A1 (en) * | 2014-04-15 | 2015-10-15 | Arnold Magnetic Technologies | Throttle control system and method |
| CN112031906A (en) * | 2020-08-11 | 2020-12-04 | 东风商用车有限公司 | Exhaust tail pipe of hazardous chemical vehicle |
-
2021
- 2021-11-17 CN CN202111374731.9A patent/CN114151184B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09112301A (en) * | 1995-10-13 | 1997-04-28 | Jidosha Kiki Co Ltd | Exhaust brake device |
| US20070240404A1 (en) * | 2006-04-18 | 2007-10-18 | Eric Pekrul | Engine Exhaust Systems with Secondary Air Injection Systems |
| US20120260626A1 (en) * | 2009-06-05 | 2012-10-18 | Anthony Colette | IC Power Plant and Method of Operation |
| US20140196454A1 (en) * | 2013-01-16 | 2014-07-17 | Ford Global Technologies, Llc | Method and system for catalyst temperature control |
| US20150292392A1 (en) * | 2014-04-15 | 2015-10-15 | Arnold Magnetic Technologies | Throttle control system and method |
| CN112031906A (en) * | 2020-08-11 | 2020-12-04 | 东风商用车有限公司 | Exhaust tail pipe of hazardous chemical vehicle |
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| Publication number | Publication date |
|---|---|
| CN114151184B (en) | 2023-03-28 |
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