CN206190411U - Control float volume diesel emission's system and diesel engine system - Google Patents
Control float volume diesel emission's system and diesel engine system Download PDFInfo
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- CN206190411U CN206190411U CN201621273071.XU CN201621273071U CN206190411U CN 206190411 U CN206190411 U CN 206190411U CN 201621273071 U CN201621273071 U CN 201621273071U CN 206190411 U CN206190411 U CN 206190411U
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- waste gas
- circulating valve
- gas circulating
- diesel engine
- diesel
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- Exhaust Gas After Treatment (AREA)
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Abstract
The utility model relates to a diesel engine technical field discloses a control float volume diesel emission's system and diesel engine system, when having realized falling low nitrogen oxide, has guaranteed the dynamic property and the economic nature of vehicle. Control float volume diesel emission's system includes: an exhaust gas recirculation valve is between the exhaust manifold and air intake manifold who installs at diesel engine, the 2nd exhaust gas recirculation valve installs between the tail pipe and the intake pipe behind the air cleaner behind the particulate filter, and controlling means for according to diesel engine's parameter with predetermine parameter value, control an exhaust gas recirculation valve and the 2nd exhaust gas recirculation valve's operating condition to low nitrogen oxide's emission is fallen. The embodiment of the utility model provides an in the emission processing procedure of the volume of being applicable to float diesel engine.
Description
Technical field
The utility model is related to Diesel Engine Technique Field, in particular it relates to a kind of control small displacement diesel emission is
System and diesel engine system.
Background technology
With the development of social economy, the attention degree more and more higher of Environmental protection, for carrying small displacement bavin
The requirement of the light truck of oil machine and the vehicle-mounted discharge of M class passenger cars is stricter.For using SCR (Selective
Catalytic Reduction, SCR) after-treatment device route reduces the mode of nitrogen oxides, light-duty card
Car and M classes passenger car are not applied to simultaneously, first because small displacement diesel-engine road vehicle in normal driving conditions mostly in low negative
Lotus region, so that delivery temperature cannot meet urea eject request, the enough spaces of SCR after-treatment devices needs are used in addition
Installation, and small-sized light truck, the space of particularly M classes passenger car are limited, so, it is difficult to meet requirement from hardware layout.Separately
The outer route for being combined with particulate filter using traditional waste gas circulating valve, oil consumption increase, dynamic property is reduced.
Utility model content
Embodiment of the present utility model provides a kind of system and diesel engine system of control small displacement diesel emission,
By two reasonable controls of waste gas circulating valve, while realizing reduction nitrogen oxides, it is ensured that the dynamic property and warp of vehicle
Ji property.
To achieve these goals, the utility model is adopted the following technical scheme that：
The utility model provides a kind of system for controlling small displacement diesel emission, including：
First waste gas circulating valve, between the exhaust manifold and inlet manifold of Diesel engine；
Air inlet pipe after second waste gas circulating valve, tailpipe after particulate filter and air filter it
Between；And
Control device, for parameter and preset parameter range according to Diesel engine, controls first waste gas circulation
The working condition of valve and the second waste gas circulating valve, to reduce the discharge of nitrogen oxides.
Optionally, first waste gas circulating valve is high temperature resistant waste gas circulating valve.
Optionally, the system also includes detection means, the pressure difference for detecting delivery temperature and the particulate filter；
The pressure difference of the control device, the delivery temperature detected according to the detection means and the particulate filter, control is described
Particulate filter performs regenerative operation, and closes second waste gas circulating valve, opens first waste gas circulating valve.
Optionally, the detection means includes exhaust gas temperature sensor, and particulate filter differential pressure pickup.
Optionally, the working condition includes unlatching and the pass of first waste gas circulating valve and the second waste gas circulating valve
Close.
Optionally, the working condition also includes multiple unlatchings of first waste gas circulating valve and the second waste gas circulating valve
Angle.
Optionally, the control device is additionally operable to：When the rotating speed of the Diesel engine is in default high speed area,
First waste gas circulating valve is closed, second waste gas circulating valve is opened；Or when the rotating speed of the Diesel engine is in
During default low rotation speed area, second waste gas circulating valve is closed, open first waste gas circulating valve.
Optionally, the control device is additionally operable to：When the rotating speed and moment of torsion of the Diesel engine meet respective simultaneously
During typical operating range, first waste gas circulating valve is closed, open second waste gas circulating valve.
Optionally, the control device is additionally operable to：When specific discharge requirement command is received, while opening described first
Waste gas circulating valve and second waste gas circulating valve.
The utility model also provides a kind of diesel engine system, and the diesel engine system includes control as described above
The system of small displacement diesel emission processed, and particulate filter, oxidation catalyzer, turbocharger, Diesel engine, in it is cold
Device device and air filter, the air filter are connected with turbocharger, and the turbocharger is filled by charge air cooler
Put and be connected with Diesel engine, the Diesel engine is connected by turbocharger with oxidation catalyzer and particulate filter,
Wherein, the first waste gas circulating valve in the system of the control small displacement diesel emission is connected to the exhaust discrimination of Diesel engine
Between pipe and inlet manifold, the second waste gas circulating valve is connected to entering after the tailpipe after particulate filter and air filter
Between tracheae.
By above-mentioned technical proposal, according to the parameter and preset parameter range of Diesel engine, to the first waste gas circulating valve
With the reasonable control of the second waste gas circulating valve, can realize reduce nitrogen oxides while, it is ensured that the dynamic property and economy of vehicle
Property.
Other features and advantages of the utility model will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is further understood to of the present utility model for providing, and constitutes a part for specification, and following
Specific embodiment be used to explain the utility model together, but do not constitute to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is a kind of schematic diagram of the system of control small displacement diesel emission that the utility model embodiment is provided；
Fig. 2 is the schematic diagram of the system of another control small displacement diesel emission that the utility model embodiment is provided；
Fig. 3 is a kind of schematic diagram of diesel engine system that the utility model embodiment is provided.
Description of reference numerals
The waste gas circulating valve of 11 first waste gas circulating valve 12 second
The detection means of 13 control device 21
The inlet manifold of 3 exhaust manifold 4
The air filter of 5 particulate filter 6
The oxidation catalyzer of 7 turbocharger 8
The intercooler of 9 Diesel engine 10
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be appreciated that herein
Described specific embodiment is merely to illustrate and explains the utility model, is not limited to the utility model.
What vehicle-mounted method discharge was mainly examined is the emission behaviour of the actual driving procedure of vehicle, and different applications are to city operating mode
There are different requirements with outskirts of a town operating mode, especially light truck and M class passenger cars, it is contemplated that actual driving situation, city and outskirts of a town work
Ratio shared by condition is higher.Diesel engine can be very good to realize that diesel oil is sent out using the emission control route of SCR after-treatment devices
Motivation bench test meets emission request, but, because SCR after-treatment devices need certain installing space, in consideration of it, light truck
And the space of M class passenger cars is limited, it is difficult to using SCR discharge courses.The utility model is directed to and is equipped with the light of particulate filter
Card and M class passenger cars, by the reasonable control of the first waste gas circulating valve and the second waste gas circulating valve, realize the drop to nitrogen oxides
It is low, meet state five, state six, particularly vehicle-mounted method emission regulation demands.
The utility model provides a kind of system 100 of control small displacement diesel emission, as shown in figure 1, the system 100
Including：
First waste gas circulating valve 11, between the exhaust manifold and inlet manifold of Diesel engine；
Air inlet pipe after second waste gas circulating valve 12, tailpipe after particulate filter and air filter it
Between；And
Control device 13, for parameter and preset parameter range according to Diesel engine, controls first waste gas to follow
The working condition of ring valve and the second waste gas circulating valve, to reduce the discharge of nitrogen oxides.
By above-mentioned technical proposal, according to the parameter and preset parameter range of Diesel engine, to the first waste gas circulating valve
With reasonable, the flexible control of the second waste gas circulating valve, realize reducing nitrogen oxides, and meeting light truck and M class passenger car cars
On the premise of carrying Abgasgesetz, it is ensured that vehicle possesses good power acceleration and fuel economy.
Wherein, because first waste gas circulating valve is arranged between the exhaust manifold of Diesel engine and inlet manifold,
Therefore it is high temperature resistant waste gas circulating valve, thermal fatigue resistance to need first waste gas circulating valve.
First waste gas circulating valve be arranged between exhaust manifold and inlet manifold, according to turbocharger front row atmospheric pressure with
Pressure difference between inlet manifold admission pressure, is changed by controlling the aperture of valve, and control enters Diesel engine inlet manifold
Extraction flow, so as to realize entering the oxygen content of air in diesel engine cylinder, realizes reducing the purpose of nitrogen oxides, and
Second waste gas circulating valve is arranged between the tailpipe after particulate filter and the air inlet pipe after air filter, by exhaust
Pressure difference before pressure and turbocharger entrance between pressure, is changed by controlling the aperture of valve, and control mixes with fresh air
Exhaust gas flow, reduce cylinder in oxygen concentration, so as to reduce the content of nitrogen oxide in tail gas.By the second waste gas circulation
The waste gas that valve loop enters air inlet pipe mixes by after particulate filter filtering with fresh air, stronger by cooling capacity
After intercooler cooling, the mixed airflow of stable and uniform is formed, so as to realize the burning of stabilization.
In addition, the operation principle of particulate filter mainly has：Exhaust when passing through particulate by spreading, damming, inertial collision,
The principles such as gravitational settling are trapped by filtering bodies.Arresting efficiency mainly be subject to diameter of particle, filtering bodies micropore size, exhaust flow rate,
The factors such as gas temperature influence, and with the growth of working time, the particulate piled up in filtering bodies increases, the back pressure of Diesel engine
To rise, influence the normal work of diesel engine, and need to be removed these particles with methods such as burnings, i.e. the regeneration of particulate filter.
As shown in Fig. 2 the system also includes detection means 21, for detecting delivery temperature and the particulate filter
Pressure difference；
The pressure of the control device 13, the delivery temperature detected according to the detection means 21 and the particulate filter
Difference, controls the particulate filter to perform regenerative operation, and closes second waste gas circulating valve, opens first waste gas and follows
Ring valve.
Wherein, the detection means 21 includes exhaust gas temperature sensor, and particulate filter differential pressure pickup.
Using the regeneration techniques of particulate filter in the prior art, by exhaust gas temperature sensor and particulate filter pressure difference
Delivery temperature and the pressure difference of the particulate filter that sensor is obtained, when the delivery temperature and the pressure of the particulate filter
When difference meets the parameter index of regenerative operation, the particulate filter is controlled to perform regenerative operation.When the particulate filter is held
During row regenerative operation, in order to protect turbocharger, second waste gas circulating valve is closed, by first waste gas circulating valve
Reduce the discharge of nitrogen oxides.
It is described that the control device controls the working condition of first waste gas circulating valve and the second waste gas circulating valve to include
The opening and closing of the first waste gas circulating valve and the second waste gas circulating valve, and first waste gas circulating valve and the second waste gas are followed
Multiple opening angles of ring valve.
Specifically, the control device is additionally operable to：
When the rotating speed of the Diesel engine is in default high speed area, first waste gas circulating valve is closed, opened
Open second waste gas circulating valve；Or
When the rotating speed of the Diesel engine is in default low rotation speed area, second waste gas circulating valve is closed, opened
Open first waste gas circulating valve.
For example, when Diesel engine is in rotating speed running on the lower load high, boosting capability is big, air inlet ability is strong, and turbine increases
Pressure is low before depressor, and air inlet enters waste gas, and for the first waste gas circulating valve, air inlet suck-back enters exhaust pipe, therefore closes institute
The first waste gas circulating valve is stated, second waste gas circulating valve is opened.When Diesel engine is under slow-speed of revolution high load capacity, if opening
The second waste gas circulating valve is opened, due to there may be bulky grain waste gas after filtering, destruction is easily caused to turbocharger, thus closed off
Second waste gas circulating valve, opens first waste gas circulating valve.
The optional control device is additionally operable to：When simultaneously the rotating speed and moment of torsion of the Diesel engine meet respective normal
During rule working range, first waste gas circulating valve is closed, open second waste gas circulating valve.
For example, when the larger region of the actual driving cycle accounting of vehicle, for fuel economy, closing described first and giving up
Gas circulating valve, opens second waste gas circulating valve.Wherein, the driving cycle is that a country or harpoon are specific to certain
What the vehicle of type was formulated, the speed-time history of the transportation condition (such as city, suburb) in a certain area can be represented.
In addition, the control device is additionally operable to：When specific discharge requirement command is received, while open described first giving up
Gas circulating valve and second waste gas circulating valve.
For example, when Diesel engine is when meeting tightened up emission request, then to open first waste gas circulation simultaneously
Valve and second waste gas circulating valve, the two is used cooperatively, and reduces the discharge of nitrogen oxides.
The utility model also provides a kind of diesel engine system, as shown in figure 3, the diesel engine system is including upper
The system for stating control small displacement diesel emission, wherein, the first waste gas circulating valve 11 is arranged on the exhaust manifold of Diesel engine 9
Between 3 and inlet manifold 4, after the second waste gas circulating valve 12 is arranged on the tailpipe after particulate filter 5 and air filter 6
Air inlet pipe between, the diesel engine system also include oxidation catalyzer 8, turbocharger 7 and intercooler 10, its
Described in turbocharger 7 connect with air filter 6, oxidation catalyzer 8, intercooler 10 and Diesel engine 9 respectively
Connect, the Diesel engine 9 is connected by turbocharger 7 with oxidation catalyzer 8 and particulate filter 5.
According to light truck and the actual driving test cycle of M class passenger cars, in control device according to the parameter of Diesel engine
And preset parameter range, the working condition to the first waste gas circulating valve and the second waste gas circulating valve carries out reasonable, flexible distribution,
Dynamic property, economy and emission result perfect unity are realized, on the premise of M class passenger cars vehicle-mounted discharge conjunction rule are met, vehicle
Possess good power acceleration and fuel economy.
Preferred embodiment of the present utility model is described in detail above in association with accompanying drawing, but, the utility model is not limited
Detail in above-mentioned implementation method, in range of the technology design of the present utility model, can be to skill of the present utility model
Art scheme carries out various simple variants, and these simple variants belong to protection domain of the present utility model.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is to each
Possible combination is planted no longer separately to illustrate.
Additionally, can also be combined between a variety of implementation methods of the present utility model, as long as it is not disobeyed
Thought of the present utility model is carried on the back, it should equally be considered as content disclosed in the utility model.
Claims (10)
1. it is a kind of control small displacement diesel emission system, it is characterised in that including：
First waste gas circulating valve, between the exhaust manifold and inlet manifold of Diesel engine；
Second waste gas circulating valve, between the air inlet pipe after tailpipe and air filter after particulate filter；With
And
Control device, for parameter and preset parameter range according to Diesel engine, control first waste gas circulating valve and
The working condition of the second waste gas circulating valve, to reduce the discharge of nitrogen oxides.
2. it is according to claim 1 control small displacement diesel emission system, it is characterised in that first waste gas is followed
Ring valve is high temperature resistant waste gas circulating valve.
3. it is according to claim 2 control small displacement diesel emission system, it is characterised in that the system also includes
Detection means, the pressure difference for detecting delivery temperature and the particulate filter；
The pressure difference of the control device, the delivery temperature detected according to the detection means and the particulate filter, control
The particulate filter performs regenerative operation, and closes second waste gas circulating valve, opens first waste gas circulating valve.
4. it is according to claim 3 control small displacement diesel emission system, it is characterised in that the detection means bag
Include exhaust gas temperature sensor, and particulate filter differential pressure pickup.
5. it is according to claim 2 control small displacement diesel emission system, it is characterised in that the working condition bag
Include the opening and closing of first waste gas circulating valve and the second waste gas circulating valve.
6. it is according to claim 5 control small displacement diesel emission system, it is characterised in that the working condition is also
Multiple opening angles including first waste gas circulating valve and the second waste gas circulating valve.
7. it is according to claim 6 control small displacement diesel emission system, it is characterised in that the control device is also
For：
When the rotating speed of the Diesel engine is in default high speed area, first waste gas circulating valve is closed, open institute
State the second waste gas circulating valve；Or
When the rotating speed of the Diesel engine is in default low rotation speed area, second waste gas circulating valve is closed, open institute
State the first waste gas circulating valve.
8. it is according to claim 6 control small displacement diesel emission system, it is characterised in that the control device is also
For：
When the rotating speed and moment of torsion of the Diesel engine meet respective typical operating range simultaneously, first waste gas is closed
Circulating valve, opens second waste gas circulating valve.
9. it is according to claim 6 control small displacement diesel emission system, it is characterised in that the control device is also
For：
When specific discharge requirement command is received, while opening first waste gas circulating valve and second waste gas circulation
Valve.
10. a kind of diesel engine system, it is characterised in that the diesel engine system is included according to claim 1-9 institutes
The system of the control small displacement diesel emission stated, and particulate filter, oxidation catalyzer, turbocharger, diesel engine
Machine, intercooler and air filter, the air filter are connected with turbocharger, during the turbocharger passes through
Cooler device is connected with Diesel engine, and the Diesel engine is by turbocharger and oxidation catalyzer and particulate filter
Connection, wherein, the first waste gas circulating valve in the system of the control small displacement diesel emission is connected to Diesel engine
Between exhaust manifold and inlet manifold, the second waste gas circulating valve is connected to tailpipe and air filter after particulate filter
Between air inlet pipe afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621273071.XU CN206190411U (en) | 2016-11-25 | 2016-11-25 | Control float volume diesel emission's system and diesel engine system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621273071.XU CN206190411U (en) | 2016-11-25 | 2016-11-25 | Control float volume diesel emission's system and diesel engine system |
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| Publication Number | Publication Date |
|---|---|
| CN206190411U true CN206190411U (en) | 2017-05-24 |
Family
ID=58725071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621273071.XU Active CN206190411U (en) | 2016-11-25 | 2016-11-25 | Control float volume diesel emission's system and diesel engine system |
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| Country | Link |
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| CN (1) | CN206190411U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927614A (en) * | 2020-09-13 | 2020-11-13 | 湖北美标康盛动力科技有限公司 | Diesel engine with cooling system |
| CN112211756A (en) * | 2020-09-26 | 2021-01-12 | 昆明云内动力股份有限公司 | Low-pressure EGR system and gas flow control method |
-
2016
- 2016-11-25 CN CN201621273071.XU patent/CN206190411U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927614A (en) * | 2020-09-13 | 2020-11-13 | 湖北美标康盛动力科技有限公司 | Diesel engine with cooling system |
| CN112211756A (en) * | 2020-09-26 | 2021-01-12 | 昆明云内动力股份有限公司 | Low-pressure EGR system and gas flow control method |
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