CN109026288B - A method of the discharge of Light-duty Vehicle particulate matter quantity is reduced based on vehicle behavior - Google Patents
A method of the discharge of Light-duty Vehicle particulate matter quantity is reduced based on vehicle behavior Download PDFInfo
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- CN109026288B CN109026288B CN201810685466.8A CN201810685466A CN109026288B CN 109026288 B CN109026288 B CN 109026288B CN 201810685466 A CN201810685466 A CN 201810685466A CN 109026288 B CN109026288 B CN 109026288B
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/031—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0233—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles periodically cleaning filter by blowing a gas through the filter in a direction opposite to exhaust flow, e.g. exposing filter to engine air intake
-
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
-
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/10—Parameters used for exhaust control or diagnosing said parameters being related to the vehicle or its components
-
- 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
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a kind of methods for reducing the discharge of Light-duty Vehicle particulate matter quantity based on vehicle behavior, by speed, engine water temperature, transmitter revolving speed and vehicle acceleration determine vehicle working condition, including being cold-started operating condition, thermal starting operating condition, warming-up operating condition, idling operation, at the uniform velocity high-speed working condition, at the uniform velocity middle speed operation, slow accelerating mode, anxious accelerating mode and decelerating mode, engine exhaust is passed through by the first granule capturing access according to each operating condition, the series and parallel structure that second granule capturing access and third granule capturing access are constituted, and control the different capacity of each granule capturing access.The particulate matter quantity under automobile difference Operation Conditions is discharged by the method for the invention, there is apparent reducing effect.
Description
Technical field
The present invention relates to a kind of methods for reducing granular material discharged by vehicle, are reduced more particularly to one kind based on vehicle behavior
The method of Light-duty Vehicle particulate matter quantity discharge.
Background technique
The particulate matter (Particulate Matter, PM) of automobile discharge has become the main source of air environmental pollution object
One of, the requirement discharged to Exhaust emission, especially particulate matter quality and quantity is increasingly stringent.Engine particle according to
Particle size can be divided into thick state (1~10 μm), state of aggregation (100~300nm) and core state (partial size is less than 50nm).Domestic and foreign scholars
Studies have shown that granular mass particle emission peak concentrates on state of aggregation and thick state, amounts of particles particle emission peak concentrates on core state.It drops simultaneously
Low engine particulate matter quality and quantity discharge have great importance for meeting the requirement of more maximum discharge regulation.
The method for reducing engine particulate matter discharge at present, the first kind are to improve hair by modes such as optimization fuel oil injections
Engine cylinder combustion process, reduces the generation of particulate matter, to reduce granular material discharged；Second class is by installing granule capturing additional
Device, the particulate matter of trapping engine discharge, to reduce granular material discharged.The method that the first kind optimizes combustion process, mainly subtracts
Few is that the biggish thick state of partial size is granular material discharged, can be realized declining to a great extent for particulate matter quality discharge.But optimization burning
The effect that the method for process reduces core state particulate matter (account for the discharge of particulate matter quantity 90% or more) is very limited, specific operation
Under, or even have the phenomenon that discharge of core state particulate matter quantity increases.The method that second class installs grain catcher additional, to granular material discharged
Arresting efficiency can reach 90% or so, can be effectively reduced granular material discharged.But grain catcher is in use process
In there are some problems, as arrested particles reach it is a certain amount of when, exhaust back pressure increases, and arresting efficiency decline, trap need again
It is raw etc..In addition, the factors such as trapping principle, structure, the material of trap are depended on to the arresting efficiency of nano-scale particle, it can not
Realize the efficient trapping to nano-scale particle.
Summary of the invention
In view of the above-mentioned defects in the prior art, the present invention provides one kind reduces Light-duty Vehicle particulate count based on vehicle behavior
The method for measuring discharge, solves the problems, such as that the grain catcher regeneration period is short, extends trap service life, realization while reduction
Grain amount of substance and quantity discharge.
Technical solution of the present invention is as follows: a method of the discharge of Light-duty Vehicle particulate matter quantity, packet are reduced based on vehicle behavior
It includes following steps: S1, determining vehicle working condition, the vehicle work by speed, engine water temperature, transmitter revolving speed and vehicle acceleration
Condition include cold start-up operating condition, thermal starting operating condition, warming-up operating condition, idling operation, at the uniform velocity high-speed working condition, at the uniform velocity in speed operation, slow
Slow accelerating mode, anxious accelerating mode and decelerating mode；S2, engine exhaust is made to pass through the first granule capturing access；At S3, vehicle
When being cold-started operating condition or warming-up operating condition, the exhaust of the first granule capturing access is made to pass through the second granule capturing access；At vehicle
When thermal starting operating condition, the 65%~70% of the exhaust of the first granule capturing access is made to pass through the second granule capturing access, remaining
Exhaust passes through third granule capturing access；When vehicle is in idling operation, the exhaust of the first granule capturing access is made to pass through third
Granule capturing access；When vehicle is at the uniform velocity high-speed working condition or decelerating mode, make the 55% of the exhaust of the first granule capturing access
~60% passes through third granule capturing access by the second granule capturing access, remaining exhaust；Vehicle is in low speed work at the uniform velocity
When condition, make the 45%~50% of the exhaust of the first granule capturing access by the second granule capturing access, remaining exhaust passes through the
Three granule capturing accesses；When vehicle is in slow accelerating mode, keep the 35%~40% of the exhaust of the first granule capturing access logical
The second granule capturing access is crossed, remaining exhaust passes through third granule capturing access；When vehicle is in slow accelerating mode, make first
For the 35%~40% of the exhaust of granule capturing access by the second granule capturing access, remaining exhaust is logical by third granule capturing
Road；When vehicle is in anxious accelerating mode, the 75%~80% of the exhaust of the first granule capturing access is made to pass through the second granule capturing
Access, remaining exhaust pass through third granule capturing access.
Further, the first granule capturing access includes the first grain catcher, and first grain catcher is flat
Equal 22~25 μm of aperture, porosity 72~76%, 7~8mil of wall thickness, length diameter ratio 0.5~0.7.
Further, the second granule capturing access includes third grain catcher, and the third grain catcher is flat
Equal 15~18 μm of aperture, porosity 65~68%, 10~12mil of wall thickness, length diameter ratio 0.9~1.1.
Further, the third granule capturing access includes the 5th grain catcher, and the 5th grain catcher is flat
Equal 10~12 μm of aperture, porosity 58~62%, 14~16mil of wall thickness, length diameter ratio 1.3~1.5.
Further, the first granule capturing access includes second granule capturing in parallel with the first grain catcher
Device, 22~25 μm of the second grain catcher average pore size, porosity 72~76%, 7~8mil of wall thickness, length diameter ratio
0.5~0.7, the engine exhaust is the first work grain catcher with the first grain catcher or the second grain catcher.
Further, the second granule capturing access includes fourth granule capturing in parallel with third grain catcher
Device, 15~18 μm of the 4th grain catcher average pore size, porosity 65~68%, 10~12mil of wall thickness, length diameter ratio
0.9~1.1, the exhaust of the first granule capturing access is the second work with third grain catcher or the 4th grain catcher
Grain catcher.
Further, the third granule capturing access includes the hexamer trapping in parallel with the 5th grain catcher
Device, 10~12 μm of the hexamer trap average pore size, porosity 58~62%, 14~16mil of wall thickness, length diameter ratio
1.3~1.5, the exhaust of the first granule capturing access works using the 5th grain catcher or hexamer trap as third
Grain catcher.
Further, after the engine exhaust passes through the first granule capturing access, when the pressure drop of exhaust is greater than 5kPa,
Switching the first work grain catcher, another grain catcher combustive regeneration of the first granule capturing access.
Further, after the exhaust of the first granule capturing access passes through the second granule capturing access, the pressure of exhaust
When drop is greater than 15kPa, switching the second work grain catcher, another grain catcher burning of the second granule capturing access is again
It is raw.
Further, after the exhaust of the first granule capturing access passes through third granule capturing access, the pressure of exhaust
When drop is greater than 20kPa, switching third work grain catcher, another grain catcher burning of third granule capturing access is again
It is raw.
Further, the cold start-up operating condition is that engine water temperature is greater than less than relative speed variation in 50 DEG C, engine 5s
2.0r/s2, engine water temperature be less than alarm critical-temperature, speed be 0 operating condition；The thermal starting operating condition is that engine water temperature is big
Relative speed variation is greater than 2.0r/s in equal to 50 DEG C, engine 5s2, engine water temperature be less than alarm critical-temperature, speed 0
Operating condition；The warming-up operating condition is engine speed n1Greater than idling speed n0, relative speed variation is less than or equal in engine 5s
2.0r/s2, engine water temperature be less than alarm critical-temperature, speed be 0 operating condition；The idling operation is engine speed n1It is small
In equal to idling speed n0And | n1-n0|≤n0× 1%, relative speed variation is less than or equal to 2.0r/s in engine 5s2, engine water
The operating condition that temperature is less than alarm critical-temperature, speed is 0；The at the uniform velocity high-speed working condition is that speed is greater than the 40% of max. speed, vapour
Vehicle acceleration a satisfaction -0.1m/s2≤a≤0.1m/s2Operating condition；The at the uniform velocity middle speed operation is that speed is less than or equal to highest vehicle
Speed 40%, pickup a satisfaction -0.1m/s2≤a≤0.1m/s2Operating condition；The slow accelerating mode is that speed is not
0, pickup a meets 0.1m/s2< a≤1.5m/s2Operating condition；It is not that 0, automobile adds that the urgency accelerating mode, which is speed,
Speed a meets a > 1.5m/s2Operating condition；The decelerating mode is that speed is not that 0, pickup a meets a < -0.1m/s2's
Operating condition.
Further, the vehicle working condition is determined by following steps:
S11, judge whether speed is 0, be for example to enter S21, it is for example no to enter S22；
S21, judge whether engine water temperature is less than alarm critical-temperature, be for example to enter S31, it is for example no to enter S32；
S22, pickup a is judged, if acceleration meets " 0.1m/s2< a≤1.5m/s2", determine that automobile is in slow
Slow accelerating mode simultaneously terminates process, if acceleration meets " a > 1.5m/s2", determine that automobile is in anxious accelerating mode and terminates
Process, if acceleration meets " a < -0.1m/s2", determine that automobile is in decelerating mode and terminates process, remaining situation enters
S33；
S31, judge that relative speed variation is greater than 2.0r/s in engine 5s2, it is for example to enter S41, it is for example no to enter S42；
S32, it carries out water temperature abnormal alarm and terminates process；
S33, judge whether speed is greater than the 40% of max. speed, be for example, determine automobile at the uniform velocity high-speed working condition simultaneously
Terminate process, for example no determining automobile is in speed operation at the uniform velocity and terminates process；
S41, whether engine water temperature is judged less than 50 DEG C, be for example to determine that automobile is in cold start-up operating condition and terminates to flow
Journey, it is for example no, determine that automobile is in thermal starting operating condition and terminates process；
S42, judge engine speed n1Whether idling speed n is greater than0, for example it is to determine that automobile is in warming-up operating condition and ties
Line journey；It is for example no to enter S51；
S51, judge n1And n0Whether meet | n1-n0|≤n0× 1%, it is for example to determine that automobile is in idling operation and ties
Line journey, it is for example no, it carries out idling abnormal alarm and terminates process.
The advantages of technical solution provided by the present invention, is: granular material discharged under different operating conditions according to vehicle
The difference of feature makes engine exhaust by different granule capturing paths, reduces the discharge of particulate matter quantity.Using the present invention
Grain catcher and trapping scheme after, compared to plain particles trap, particulate matter quantity discharge fall be respectively
63.9%, 52.9%, 43%, 43.8%.Granule capturing scheme of the invention is for the particulate matter under automobile difference Operation Conditions
Quantity discharge, there is apparent reducing effect.
Detailed description of the invention
Fig. 1 is that vehicle working condition of the present invention determines method flow schematic diagram.
Fig. 2 is exhaust channel structural schematic diagram of the present invention.
Fig. 3 is speed curve diagram when automobile is run at a low speed in embodiment.
Fig. 4 is speed curve diagram when automobile drives at moderate speed in embodiment.
Speed curve diagram when Fig. 5 is galloping in embodiment.
Fig. 6 is automobile ultrahigh speed speed curve diagram when driving in embodiment.
Fig. 7 is particulate emission result schematic diagram.
Specific embodiment
Below with reference to embodiment, the invention will be further described, it should be understood that these embodiments be merely to illustrate the present invention and
It is not used in and limits the scope of the invention, after the present invention has been read, those skilled in the art are to various equal similar shapes of the invention
The modification of formula is fallen in the application range as defined in the appended claims.
Incorporated by reference to shown in Fig. 1, the side of Light-duty Vehicle particulate matter quantity discharge is reduced involved in embodiment based on vehicle behavior
Method be such that first carry out vehicle working condition determination, the present invention in vehicle working condition be divided into cold start-up operating condition, thermal starting operating condition,
Warming-up operating condition, idling operation, at the uniform velocity high-speed working condition, at the uniform velocity middle speed operation, slow accelerating mode, anxious accelerating mode and deceleration work
Condition is specific to determine that steps are as follows:
S11, judge whether speed is 0, be for example to enter S21, it is for example no to enter S22；
S21, judge whether engine water temperature is less than alarm critical-temperature, be for example to enter S31, it is for example no to enter S32；
S22, pickup a is judged, if acceleration meets " 0.1m/s2< a≤1.5m/s2", determine that automobile is in slow
Slow accelerating mode simultaneously terminates process, if acceleration meets " a > 1.5m/s2", determine that automobile is in anxious accelerating mode and terminates
Process, if acceleration meets " a < -0.1m/s2", determine that automobile is in decelerating mode and terminates process, remaining situation enters
S33；
S31, judge that relative speed variation is greater than 2.0r/s in engine 5s2, it is for example to enter S41, it is for example no to enter S42；
S32, it carries out water temperature abnormal alarm and terminates process；
S33, judge whether speed is greater than the 40% of max. speed, be for example, determine automobile at the uniform velocity high-speed working condition simultaneously
Terminate process, for example no determining automobile is in speed operation at the uniform velocity and terminates process；
S41, whether engine water temperature is judged less than 50 DEG C, be for example to determine that automobile is in cold start-up operating condition and terminates to flow
Journey, it is for example no, determine that automobile is in thermal starting operating condition and terminates process；
S42, judge engine speed n1Whether idling speed n is greater than0, for example it is to determine that automobile is in warming-up operating condition and ties
Line journey；It is for example no to enter S51；
S51, judge n1And n0Whether meet | n1-n0|≤n0× 1%, it is for example to determine that automobile is in idling operation and ties
Line journey, it is for example no, it carries out idling abnormal alarm and terminates process.
Different operating condition vehicle exhaust channel structures are directed to as shown in Fig. 2, engine exhaust connects first flow in order to realize
Control valve 1, the outlet of first flow control valve 1 are separately connected the first grain catcher 2 and the second grain catcher 3, the first particle
The outlet of trap 2 is respectively connected to 1 entrance of first flow control valve composition first by second flow control valve 4 and regenerates back
Road, and it is connected to 6 entrance of the 4th flow control valve；Distinguished by third flow control valve 5 outlet of second grain catcher 3
It is connected to 1 entrance of first flow control valve and constitutes the second regenerative circuit, and be connected to 6 entrance of the 4th flow control valve.By simultaneously
The first grain catcher 2 and the second grain catcher 3 of connection constitute the first granule capturing access, 2 He of the first grain catcher
Second grain catcher 3 all use wall flow type particle trap, ceramic honey comb specific structure parameter be 22~25 μm of average pore size,
Porosity 72~76%, 7~8mil of wall thickness, length diameter ratio 0.5~0.7.The outlet of 4th flow control valve 6 is separately connected the 5th
7 entrance of flow control valve and 8 entrance of the 8th flow control valve.
The outlet of 5th flow control valve 7 is separately connected third grain catcher 9 and the 4th grain catcher 10, third particle
The outlet of trap 9 is respectively connected to 7 entrance of the 5th flow control valve composition third by the 6th flow control valve 11 and regenerates back
Road, and directly as air exit；The outlet of 4th grain catcher 10 is respectively connected to by the 7th flow control valve 12
5th flow control valve, 7 entrance constitutes the 4th regenerative circuit, and directly as air exit.By third granule capturing in parallel
Device 9 and the 4th grain catcher 10 constitute the second granule capturing access, third grain catcher 9 and the 4th grain catcher 10
All use wall flow type particle trap, ceramic honey comb specific structure parameter be 15~18 μm of average pore size, porosity 65~68%,
10~12mil of wall thickness, length diameter ratio 0.9~1.1.
8th flow control valve 8, which exports, is separately connected the 5th grain catcher 13 and hexamer trap 14, and the 5th
The outlet of grain trap 13 is respectively connected to 8 entrance of the 8th flow control valve by the 9th flow control valve 15 and constitutes the 5th regeneration
Circuit, and directly as air exit；The outlet of hexamer trap 14 is separately connected by the tenth flow control valve 16
The 6th regenerative circuit is constituted to 8 entrance of the 8th flow control valve, and directly as air exit.It is caught by the 5th particle in parallel
Storage 13 and hexamer trap 14 constitute the second granule capturing access, the 5th grain catcher 13 and hexamer trapping
Device 14 all use wall flow type particle trap, ceramic honey comb specific structure parameter be 10~12 μm of average pore size, porosity 58~
62%, 14~16mil of wall thickness, length diameter ratio 1.3~1.5.
Under all operating conditions, the exhaust of vehicle all first passes through the first granule capturing access, then according to different operating condition tune
Whole 4th flow control valve 6 makes the exhaust of the first granule capturing access flow to different granule capturing accesses, specific:
When vehicle is in cold start-up operating condition or warming-up operating condition, catch the exhaust of the first granule capturing access by the second particle
Collect access；
When vehicle is in thermal starting operating condition, the 65%~70% of the exhaust of the first granule capturing access is made to pass through the second particle
Access is trapped, remaining exhaust passes through third granule capturing access；
When vehicle is in idling operation, the exhaust of the first granule capturing access is made to pass through third granule capturing access；
When vehicle is at the uniform velocity high-speed working condition or decelerating mode, make the 55%~60% of the exhaust of the first granule capturing access
By the second granule capturing access, remaining exhaust passes through third granule capturing access；
When vehicle is in speed operation at the uniform velocity, the 45%~50% of the exhaust of the first granule capturing access is made to pass through second
Granule capturing access, remaining exhaust pass through third granule capturing access；
When vehicle is in slow accelerating mode, the 35%~40% of the exhaust of the first granule capturing access is made to pass through second
Grain trapping access, remaining exhaust pass through third granule capturing access；
When vehicle is in slow accelerating mode, the 35%~40% of the exhaust of the first granule capturing access is made to pass through second
Grain trapping access, remaining exhaust pass through third granule capturing access；
When vehicle is in anxious accelerating mode, the 75%~80% of the exhaust of the first granule capturing access is made to pass through the second particle
Access is trapped, remaining exhaust passes through third granule capturing access.
In first granule capturing access, work and the regeneration switching of the first grain catcher 2 and the second grain catcher 3 are
Such, control first flow control valve 1 first makes engine exhaust all flow to the first grain catcher 2, and first at this time
Grain trap 2 is the first work grain catcher, and control second flow control valve 4 flows to the exhaust of the first grain catcher 2
4th flow control valve 6.The 2 front and back pressure drop of the first grain catcher is detected during this, when pressure drop is greater than 5kPa, control
First flow control valve 1 makes engine exhaust all flow to the second grain catcher 3, and the second grain catcher 3 is first at this time
Work grain catcher, and control third flow control valve 5 makes the exhaust of the second grain catcher 3 flow to the 4th flow control valve 6.
Combustive regeneration is carried out to the first grain catcher 2, control second flow control valve 4 makes the exhaust gas recirculation of the first grain catcher 2
To 1 entrance of first flow control valve.When second grain catcher 3 is the first work grain catcher, the second granule capturing is detected
3 front and back pressure drop of device, when pressure drop is greater than 5kPa, switching the first grain catcher 2 again is the first work grain catcher.
In second granule capturing access, the work and regeneration of third grain catcher 9 and the 4th grain catcher 10 switch
Be it is such, first control the 5th flow control valve 7 so that 6 final vacuum of the 4th flow control valve is flowed to third grain catcher 9, this
When third grain catcher 9 be the second work grain catcher, the 6th flow control valve 11 of control makes third grain catcher 9
Exhaust is expelled directly out.The 9 front and back pressure drop of third grain catcher is detected during this, when pressure drop is greater than 15kPa, control the
Five flow control valves 7 make 6 final vacuum of the 4th flow control valve flow to the 4th grain catcher 10, at this time the 4th grain catcher 10
For the second work grain catcher, the 7th flow control valve 12 of control is expelled directly out the exhaust of the 4th grain catcher 10.It is right
Third grain catcher 9 carries out combustive regeneration, and the 6th flow control valve 11 of control makes the exhaust gas recirculation of third grain catcher 9 extremely
5th flow control valve, 7 entrance.When 4th grain catcher 10 is the second work grain catcher, the 4th grain catcher is detected
10 front and back pressure drops, when pressure drop is greater than 15kPa, switching third grain catcher 9 again is the second work grain catcher.
In third granule capturing access, the work and regeneration of the 5th grain catcher 13 and hexamer trap 14 switch
Be it is such, first control the 8th flow control valve 8 so that 6 final vacuum of the 4th flow control valve is flowed to the 5th grain catcher 13,
The 5th grain catcher 13 is third work grain catcher at this time, and the 9th flow control valve 15 of control makes the 5th grain catcher
13 exhaust is expelled directly out.The 13 front and back pressure drop of the 5th grain catcher is detected during this, when pressure drop is greater than 20kPa,
Controlling the 8th flow control valve 8 makes 6 final vacuum of the 4th flow control valve flow to hexamer trap 14, and hexamer is caught at this time
Storage 14 is third work grain catcher, and the tenth flow control valve 16 of control arranges the exhaust of hexamer trap 14 directly
Out.Combustive regeneration is carried out to the 5th grain catcher 13, the 9th flow control valve 15 of control makes the row of the 5th grain catcher 13
Gas is back to 8 entrance of the 8th flow control valve.When hexamer trap 14 is third work grain catcher, the 6th is detected
Grain 14 front and back pressure drop of trap, when pressure drop is greater than 20kPa, switching the 5th grain catcher 13 again is third work particle
Trap.
In order to compare the effect of the method for the present invention, engine exhaust is directly passed through into grain catcher as a comparison case, is asked
In conjunction with shown in Fig. 3 to Fig. 7, automobile carries out normally travel under low speed, middling speed, high speed and ultrahigh speed respectively, and detection is implemented respectively
Example discharge, comparative example discharge and direct emission, specific structure be compared with the direct emission withouyt grain catcher, using pair
Proportion scheme has certain effect for reducing the discharge of particulate matter quantity, under low speed, middling speed, high speed and ultrahigh speed operating condition,
The fall of grain object quantity discharge is respectively 16.8%, 15.7%, 19.4%, 23.8%.After example scheme, compare
In comparative example scheme, the discharge of particulate matter quantity is further had dropped, fall is respectively 63.9%, 52.9%, 43%,
43.8%.The method of the present invention discharges the particulate matter quantity under automobile difference Operation Conditions, there is apparent reducing effect.
Claims (9)
1. a kind of method for reducing the discharge of Light-duty Vehicle particulate matter quantity based on vehicle behavior, which comprises the following steps:
S1, determine that vehicle working condition, the vehicle working condition include cold open by speed, engine water temperature, transmitter revolving speed and vehicle acceleration
Start building condition, thermal starting operating condition, warming-up operating condition, idling operation, at the uniform velocity high-speed working condition, at the uniform velocity in speed operation, slow accelerating mode,
Anxious accelerating mode and decelerating mode；S2, engine exhaust is made to pass through the first granule capturing access；S3, vehicle are in cold start-up work
When condition or warming-up operating condition, the exhaust of the first granule capturing access is made to pass through the second granule capturing access；Vehicle is in thermal starting work
When condition, make the 65%~70% of the exhaust of the first granule capturing access by the second granule capturing access, remaining exhaust passes through the
Three granule capturing accesses；When vehicle is in idling operation, keep the exhaust of the first granule capturing access logical by third granule capturing
Road；When vehicle is at the uniform velocity high-speed working condition or decelerating mode, pass through the 55%~60% of the exhaust of the first granule capturing access
Second granule capturing access, remaining exhaust pass through third granule capturing access；When vehicle is in speed operation at the uniform velocity, make first
For the 45%~50% of the exhaust of granule capturing access by the second granule capturing access, remaining exhaust is logical by third granule capturing
Road；When vehicle is in slow accelerating mode, catch the 35%~40% of the exhaust of the first granule capturing access by the second particle
Collect access, remaining exhaust passes through third granule capturing access；When vehicle is in slow accelerating mode, make the first granule capturing access
Exhaust 35%~40% by the second granule capturing access, remaining exhaust passes through third granule capturing access；Vehicle is in
When anxious accelerating mode, the 75%~80% of the exhaust of the first granule capturing access is made to pass through the second granule capturing access, remaining row
Gas passes through third granule capturing access；The vehicle working condition is determined by following steps:
S11, judge whether speed is 0, be for example to enter S21, it is for example no to enter S22；
S21, judge whether engine water temperature is less than alarm critical-temperature, be for example to enter S31, it is for example no to enter S32；
S22, pickup a is judged, if acceleration meets " 0.1m/s2< a≤1.5m/s2", it determines that automobile is in and slowly adds
Fast operating condition simultaneously terminates process, if acceleration meets " a > 1.5m/s2", determine that automobile is in anxious accelerating mode and terminates process,
If acceleration meets " a < -0.1m/s2", determine that automobile is in decelerating mode and terminates process, remaining situation enters S33；
S31, judge that relative speed variation is greater than 2.0r/s in engine 5s2, it is for example to enter S41, it is for example no to enter S42；
S32, it carries out water temperature abnormal alarm and terminates process；
S33, judge whether speed is greater than the 40% of max. speed, be for example, determine that automobile is at the uniform velocity high-speed working condition and terminates
Process, for example no determining automobile are in speed operation at the uniform velocity and terminate process；
S41, whether engine water temperature is judged less than 50 DEG C, be for example to determine that automobile is in cold start-up operating condition and terminates process, such as
Be it is no, determine that automobile is in thermal starting operating condition and terminates process；
S42, judge engine speed n1Whether idling speed n is greater than0, for example it is to determine that automobile is in warming-up operating condition and terminates to flow
Journey；It is for example no to enter S51；
S51, judge n1And n0Whether meet | n1-n0|≤n0× 1%, it is for example to determine that automobile is in idling operation and terminates to flow
Journey, it is for example no, it carries out idling abnormal alarm and terminates process.
2. the method according to claim 1 for reducing the discharge of Light-duty Vehicle particulate matter quantity based on vehicle behavior, feature exist
In, the first granule capturing access include the first grain catcher, 22~25 μm of the first grain catcher average pore size,
Porosity 72~76%, 7~8mil of wall thickness, length diameter ratio 0.5~0.7；The second granule capturing access includes third
Grain trap, 15~18 μm of the third grain catcher average pore size, porosity 65~68%, 10~12mil of wall thickness, length
Diameter is than 0.9~1.1；The third granule capturing access includes the 5th grain catcher, and the 5th grain catcher is average
10~12 μm of aperture, porosity 58~62%, 14~16mil of wall thickness, length diameter ratio 1.3~1.5.
3. the method according to claim 2 for reducing the discharge of Light-duty Vehicle particulate matter quantity based on vehicle behavior, feature exist
In the first granule capturing access includes second grain catcher in parallel with the first grain catcher, second particle
22~25 μm of trap average pore size, porosity 72~76%, 7~8mil of wall thickness, length diameter ratio 0.5~0.7, it is described to start
Machine exhaust is by the first grain catcher or the second grain catcher by the first granule capturing access.
4. the method according to claim 2 for reducing the discharge of Light-duty Vehicle particulate matter quantity based on vehicle behavior, feature exist
In the second granule capturing access includes fourth grain catcher in parallel with third grain catcher, the 4th particle
15~18 μm of trap average pore size, porosity 65~68%, 10~12mil of wall thickness, length diameter ratio 0.9~1.1, described
The exhaust of one granule capturing access is by third grain catcher or the 4th grain catcher by the second granule capturing access.
5. the method according to claim 2 for reducing the discharge of Light-duty Vehicle particulate matter quantity based on vehicle behavior, feature exist
In the third granule capturing access includes the hexamer trap in parallel with the 5th grain catcher, the hexamer
10~12 μm of trap average pore size, porosity 58~62%, 14~16mil of wall thickness, length diameter ratio 1.3~1.5, described
The exhaust of one granule capturing access is by hexamer trap or the second grain catcher by the 5th granule capturing access.
6. the method according to claim 3 for reducing the discharge of Light-duty Vehicle particulate matter quantity based on vehicle behavior, feature exist
In, after the engine exhaust passes through the first granule capturing access, when the pressure drop of exhaust is greater than 5kPa, the first work of switching
Grain trap, another grain catcher combustive regeneration of the first granule capturing access.
7. the method according to claim 4 for reducing the discharge of Light-duty Vehicle particulate matter quantity based on vehicle behavior, feature exist
In, after the exhaust of the first granule capturing access passes through the second granule capturing access, when the pressure drop of exhaust is greater than 15kPa,
Switching the second work grain catcher, another grain catcher combustive regeneration of the second granule capturing access.
8. the method according to claim 5 for reducing the discharge of Light-duty Vehicle particulate matter quantity based on vehicle behavior, feature exist
In, after the exhaust of the first granule capturing access passes through third granule capturing access, when the pressure drop of exhaust is greater than 20kPa,
Switch third work grain catcher, another grain catcher combustive regeneration of third granule capturing access.
9. the method according to claim 1 for reducing the discharge of Light-duty Vehicle particulate matter quantity based on vehicle behavior, feature exist
In the cold start-up operating condition is greater than 2.0r/s less than relative speed variation in 50 DEG C, engine 5s for engine water temperature2, engine
The operating condition that water temperature is less than alarm critical-temperature, speed is 0；The thermal starting operating condition is that engine water temperature is more than or equal to 50 DEG C, hair
Relative speed variation is greater than 2.0r/s in motivation 5s2, engine water temperature be less than alarm critical-temperature, speed be 0 operating condition；It is described warm
Machine operating condition is engine speed n1Greater than idling speed n0, relative speed variation is less than or equal to 2.0r/s in engine 5s2, engine
The operating condition that water temperature is less than alarm critical-temperature, speed is 0；The idling operation is engine speed n1Less than or equal to idling speed
n0And | n1-n0|≤n0× 1%, relative speed variation is less than or equal to 2.0r/s in engine 5s2, engine water temperature be less than alarm it is critical
Temperature, the operating condition that speed is 0；The at the uniform velocity high-speed working condition is that speed is greater than the 40% of max. speed, pickup a satisfaction-
0.1m/s2≤a≤0.1m/s2Operating condition；The at the uniform velocity middle speed operation is that speed is less than or equal to the 40% of max. speed, automobile
Acceleration a satisfaction -0.1m/s2≤a≤0.1m/s2Operating condition；The slow accelerating mode is that speed is not 0, pickup a
Meet 0.1m/s2< a≤1.5m/s2Operating condition；It is not that 0, pickup a meets a > that the urgency accelerating mode, which is speed,
1.5m/s2Operating condition；The decelerating mode is that speed is not that 0, pickup a meets a < -0.1m/s2Operating condition.
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| CN112664301B (en) * | 2020-12-23 | 2022-03-01 | 潍柴动力股份有限公司 | DPF active regeneration method |
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| JP3966272B2 (en) * | 2003-12-02 | 2007-08-29 | マツダ株式会社 | Engine exhaust purification system |
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