CN109854346A - Method for adjusting the pressure of allocating system - Google Patents
Method for adjusting the pressure of allocating system Download PDFInfo
- Publication number
- CN109854346A CN109854346A CN201811443633.4A CN201811443633A CN109854346A CN 109854346 A CN109854346 A CN 109854346A CN 201811443633 A CN201811443633 A CN 201811443633A CN 109854346 A CN109854346 A CN 109854346A
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- Prior art keywords
- pressure
- adjusting
- ration
- parameter
- point form
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Classifications
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- 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
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1808—Pressure
-
- 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
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1821—Injector parameters
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Feedback Control In General (AREA)
- Control Of Fluid Pressure (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of methods for adjusting the pressure of allocating system, which is characterized in that the adjusting is that two point form is adjusted, and the leading parameter of the adjusting is the function that ration requires.
Description
Technical field
The method that the present invention relates to a kind of for adjusting the pressure of allocating system, a kind of computer program, a kind of machine can
The storage medium of reading and a kind of electronic controller.
Background technique
It is well known in the art, in order to keep the stress level in allocating system, such as SCR- system, according to pressure come
Adjust the manipulation to pump.Using typical two point form adjuster, corresponding component is activated when being more than boundary value.
But it herein, is required especially for big throughput or dynamic amount, occurs the apparent variation of system pressure sometimes, this is
Because the adjusting is just making a response to the deviation of pressure.Reaction time and system of this effect by regulating mechanism
Damping and enhanced, thus pressure pulse just lag ground can geodetic change system pressure.
Summary of the invention
In the method for the pressure for adjusting allocating system, the adjusting is that two point form is adjusted, and is adjusted leading
Parameter is the function that ration requires.
Ration, which requires all to pass through the controller of allocating system for each time point, to be calculated, and thus in the control
It can be used in device.
According to regulation technology, leading parameter is such parameter, to be adjusted according to the parameter to adjustable parameter.The master
It is previously given from outside to lead parameter.Adjust leading that adjusting is formd between parameter and adjustable parameter is poor, and accordingly by holding
Row link influences system to be regulated.For heating up, such as temperature is exactly adjustable parameter and sets on thermostat
Temperature is leading parameter.Adjust difference be setting temperature and actual temperature between difference, improved according to the difference or reduce add
Thermal power.The current value of leading parameter is theoretical value.If leading parameter does not change over, two terms " leading parameter " and
" theoretical value " can be used synonymously.
Regulating loop is generally as follows work.It is that given dynamical system-is also named that adjustable parameter y (t)-, which is also actual value-,
Adjusting route (Regelstrecke) or also referred to as route-survey parameter.Adjustable parameter y (t) depends on executing parameter u
(t) and parameter d (t) is interfered.Adjustable parameter y (t) is compared with leading parameter w (t).Adjusting deviation e (t) is actual value and theoretical value
Between difference.Thus have: e (t)=w (t)-y (t).The adjusting difference is fed to adjuster, and adjuster is thus according to adjusting back
The desired time response on road, which is formed, executes parameter u (t).Executing link can be the component part of adjuster, but most
In number situation, it is an independent equipment.
Two point form adjuster is that there are two types of the adjusters of original state for a kind of tool discontinuously to work.According to actual value height
Above or below original state is in again below theoretical value in theoretical value.Two point form adjuster is typically used in as follows
Situation: when cannot continuously change when executing parameter, but can be only in two states, for example switch on or off.Two point form tune
Although section device reaches a kind of stable state, but never static.However in leading parameter change dramatically, compared to using other
Adjusting method, the two point form adjuster can correct (ausregeln) adjusting deviation more quickly.One of two point form adjuster
Well known example is thermostat, with constant power regulation heating or cooling device.
The leading parameter adjusted is the function that ration requires.This is equivalent to prefilter.It is possible thereby to advantageously exist
Change the acceleration that the response characteristic of regulating mechanism is realized when dispensing requires.Furthermore, it is possible to inhibit (anfangen) in big quality stream
In the case where pressure drift (Druckdrift).
According to a kind of preferred embodiment, the interference limit of two point form adjusting, i.e. leading parameter existWith
pnomBetween change.Here, pnomBe by adjusting the pressure that can averagely reach, i.e. average theoretical pressure during method,
And Δ p is the pressure rise of each pump stroke.Preferably, the pressure rise of each stroke is previously given pressure difference.For
The absolute deviation as small as possible relative to theoretical pressure is realized in static operation, and being not dependent on for leading parameter is matched
The part required to amount is set as pnom-Δp/2.If thus two point form is adjusted in pressure pnomInterfere and produce in the case where Δ p/2
The pump stroke of raw Δ p, then pressure rises to pnom+Δp/2.Thus it is advantageously carried out pressure oscillation pnom, here it is what is realized.
According to another preferred embodiment, the leading parameter of adjusting is the linear function that ration requires.Here, the line
Property function preferably has positive slope.In this case, advantageously increase leading parameter, if required quality stream improves
If, to generate pump stroke in higher pressure, i.e. in the lesser situation of deviation relative to theoretical pressure.Another advantage
It is to avoid negative pressure in this way, which, which results from, requires the valve activity equally improved according to ration.
According to another preferred embodiment, leading parameter is obtained by following function:
,
Wherein,It is ration requirement, andIt is the largest ration requirement.The function advantageously meets as follows
Characteristic: both make that the limit, i.e. leading parameter is interfered to existAnd pnomBetween change, and make adjust leading parameter be to match
The linear function with positive slope required to amount.
Maximum ration requires preferably constant.This has the advantages that with the identical interference limit always to one
Fixed amount requires to make a response.But according to another preferred embodiment, maximum ration requirement can be at any point in time
Change.This has the advantages that system is variable.
According to a kind of preferred embodiment, two point form, which is adjusted, has sluggishness.This has the advantages that adjuster from one kind
Original state is switched to another original state needs and changes actual value previously givenly.This prevents the excessively frequency of adjuster again
Numerous switching.
According to another preferred embodiment, allocating system is SCR- system.It is possible thereby to advantageously adjust SCR- system
The pressure of system.
Computer program is arranged for especially when it runs on electronic controller or calculating equipment described in execution
Each step of method.This, which is able to achieve, realizes this method in common controller, without carrying out change structurally to it.
For this purpose, computer program is stored on machine readable storage medium.It is calculated by being run on common electronic controller
Machine program has obtained the electronic controller for the pressure for being arranged for adjusting allocating system.
Detailed description of the invention
It is described in detail shown in the drawings of one embodiment of the present of invention, and in subsequent instruction.
Fig. 1 shows the dispensing of the dispensing module according to prior art with the reducing agent solution for SCR- catalyst converter
The schematic diagram of the component of system；
Fig. 2 shows the adjustings of the method for executing the pressure for adjusting allocating system of embodiment according to the present invention
The interference limit relevant to ration of device；
Fig. 3 shows the manipulation to dispensing pump of embodiment according to the present invention, which not only depends on pressure, but also depends on
Theoretical mass flow.
Specific embodiment
Fig. 1 shows the interception part of the exhaust gas system 10 of the internal combustion engine 13 of motor vehicle.The exhaust gas system 10 includes by internal combustion engine 13
Exhaust gas streamwise 12 flow SCR- catalyst converter mechanism 11.Dispensing module 20 is located at the upper of SCR- catalyst converter mechanism 11
Trip is sprayed by the dispensing module according to mode as needed molten for reducing agent required for SCR- catalyst converter mechanism 11
Liquid.Dispensing module 20 is supplied to lay in the reducing agent solution in tank 21.By delivery pump 22 by reducing agent solution via pumping
Suction pipe road 23 is taken out from tank 21, and is delivered to dispensing module 20 via supply line 24 under stress.In supply line 24
It is connected to pressure-measuring device 25, as delivery pump 22, which is equally connect with controller 26.
It is known in the art that using two point form in order to adjust the pressure in supply line 24 and adjusting.
Leading parameter w is constant theoretical value, i.e. constant pressure value in this case.Adjusting deviation is in supply pipe
The difference between the pressure measured by pressure-measuring device 25 and constant pressure value in road 24.Executing link is in this case
Actuator, the actuator change the movement of delivery pump 22, i.e., or cause the stroke of delivery pump 22 or do not cause its stroke.
Adjusting route is the system being made of tank 21, delivery pump 22, supply line 24 and dispensing module 20.Adjustable parameter is in such case
Under be the pressure measured by pressure-measuring device 25 in supply line 24.
In this case, two point form adjusts following work.The dispensing module 20 of SCR- system is so controlled by controller 26
System, so that required reducing agent solution is sprayed into exhaust gas system 10 respectively.But meanwhile two point form is adjusted in supply line 24
The pressure measured is adjusted.If the pressure measured in supply line 24 is lower than certain threshold value, it is activated by actuator, it should
Actuator causes such pump stroke, which realizes so that pressure improves Δ p.If the pressure in supply line 24 reaches
The theoretical value of pressure, then not reactivation actuator, to no longer improve pressure.
Fig. 2 shows interference relevant to the ration poles of the adjuster for pumping manipulation of embodiment according to the present invention
Limit w.Under the present case that two point form is adjusted, leading parameter is also the interference limit, this is because adjusting is its corresponding
Interfered in the case of value.In Fig. 2, require mutually to depict to reference the adjuster for pumping manipulation with standardized ration
, the interference limit measured as unit of pressure.Standardized ration requires to be ration requirementWith maximum dispensing
Amount requiresRatio.The quotient thus changes between value 0 and 1.Herein, maximum ration requirement is steady state value.
The interference limit is obtained by following function:
。
It is visible in fig. 2, interfere the limit when ration requires to disappear between 6.0 and 6.1 bars, approximately equal to 6.03
Bar, and be 6.5 bars when ration requires maximum.Therefore, pnomIt is 6.5 bars, and Δ p is approximately equal to 0.94 bar.Herein
In, for the requirement of maximum ration, 4 kg/h are representative values.
Fig. 3 shows manipulation of the embodiment according to the present invention to pump, which not only depends on pressure, but also depends on theory
Quality stream.
In the attached drawing of the part the upper surface of Fig. 3, depict relative to the time measured in seconds in supply line
In 24 by bar as unit of and the pressure p that measures.Attached drawing below Fig. 3 in the attached drawing of part, relative to the part the upper surface of Fig. 3
Same time shaft depict the requirement of standardized ration.
The following work of adjusting.For each value that the standardized ration drawn on a timeline requires, by
Fig. 2 has obtained the interference limit.If the pressure measured is at corresponding time point lower than the interference limit, two point form adjusting is done
Pump stroke is related to and generates, which makes the pressure in system improve previously given pressure value.This is in the part the upper surface of Fig. 3
View in be respectively 0.26 bar of value.
In the view of the part the upper surface of Fig. 3, the theoretical value of the pressure in supply line is depicted, which is equal to
pnom, i.e. 6.5 bars.In addition, adjusting time point t when interfering for two point form0And t1, depict corresponding pressure value.It is right
In time point t0, below Fig. 3 in the view of part it can be seen that, standardized ration requires to be 82%.It can in Fig. 2
To see, at the 80% of the value that slightly above standardized ration requires, the interference limit is approximately equal to 6.42 bars.This exactly exists
The value p drawn in the view of the part the upper surface of Fig. 30, and two point form adjusting is interfered at the value.Improving 0.26 bar
Later, system pressure has 6.68 bars of value, which can also see in the view of the part the upper surface of Fig. 3.
Passing through t0In subsequent process afterwards, point multiple steps of system pressure are reduced, until two point form adjust again into
Row interference.In time point t0And t1Between, this have occurred it is other twice.In time point t1, standardized ration requires
70% value.For the value, about 6.35 bars of the interference limit is obtained by Fig. 2, is used as p1View in the part the upper surface of Fig. 3
In draw, and this two point form adjusting interfered.After improving 0.26 bar, system pressure has 6.61 bars of value,
The value can also be seen in the view of the part the upper surface of Fig. 3.
Claims (9)
1. a kind of method for adjusting the pressure of allocating system, which is characterized in that the adjusting is that two point form is adjusted, and institute
The leading parameter for stating adjusting is the function of ration requirement.
2. the method as described in claim 1, which is characterized in that the interference limit that the two point form is adjusted existsWith
pnomBetween change, pnomIt is the pressure that can be averagely reached by the adjusting, and Δ p is the pressure liter of each pump stroke
It is high.
3. method according to claim 1 or 2, which is characterized in that the leading parameter of the adjusting is the ration requirement
Linear function.
4. method as described in any one of the preceding claims, which is characterized in that the leading parameter is obtained by following function:
,
Wherein,It is the ration requirement, andIt is the largest ration requirement.
5. method as described in any one of the preceding claims, which is characterized in that the two point form, which is adjusted, has sluggishness.
6. method as described in any one of the preceding claims, which is characterized in that the allocating system is SCR- system.
7. a kind of computer program, be arranged for executing according to claim 1 to any one of 6 method each step
Suddenly.
8. a kind of machine readable storage medium, is stored with the computer program according to preceding claims on it.
9. a kind of electronic controller, be arranged for executing according to claim 1 to any one of 6 method each step
Suddenly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017221577.1A DE102017221577A1 (en) | 2017-11-30 | 2017-11-30 | Method for regulating a pressure of a dosing system |
| DE102017221577.1 | 2017-11-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109854346A true CN109854346A (en) | 2019-06-07 |
| CN109854346B CN109854346B (en) | 2022-06-03 |
Family
ID=66547960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811443633.4A Active CN109854346B (en) | 2017-11-30 | 2018-11-29 | Method for regulating the pressure of a dosing system |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR102580091B1 (en) |
| CN (1) | CN109854346B (en) |
| DE (1) | DE102017221577A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030023366A1 (en) * | 2001-07-03 | 2003-01-30 | Gerhard Geyer | Method of operating an internal combustion engine |
| CN101506482A (en) * | 2006-07-13 | 2009-08-12 | 因勒纪汽车系统研究公司 | System and process for storing an additive and injecting it into the exhaust gases of an engine |
| CN102597445A (en) * | 2009-09-10 | 2012-07-18 | 标致·雪铁龙汽车公司 | Device and method for regulating the injection of a quantity of reducer in the gaseous phase |
| CN103321718A (en) * | 2012-03-20 | 2013-09-25 | 罗伯特·博世有限公司 | Method and control unit for metering fuel into an exhaust gas duct |
| CN104508279A (en) * | 2012-04-05 | 2015-04-08 | 西港能源有限公司 | Method and apparatus for controlling fuel pressure in a gaseous fuelled internal combustion engine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10360775A1 (en) * | 2003-12-23 | 2005-07-28 | Robert Bosch Gmbh | Sensor device for internal combustion engine exhaust gases and operating and evaluation methods |
| EP2366448B1 (en) * | 2010-03-16 | 2016-07-27 | Amminex Emissions Technology A/S | Method and device for controlled dosing of a gas with fluctuating supply pressure |
| JP2014015856A (en) * | 2012-07-06 | 2014-01-30 | Bosch Corp | Reductant agent supply device, recovery control method of liquid reductant agent, and exhaust emission control device |
-
2017
- 2017-11-30 DE DE102017221577.1A patent/DE102017221577A1/en active Pending
-
2018
- 2018-11-27 KR KR1020180148079A patent/KR102580091B1/en active IP Right Grant
- 2018-11-29 CN CN201811443633.4A patent/CN109854346B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030023366A1 (en) * | 2001-07-03 | 2003-01-30 | Gerhard Geyer | Method of operating an internal combustion engine |
| CN101506482A (en) * | 2006-07-13 | 2009-08-12 | 因勒纪汽车系统研究公司 | System and process for storing an additive and injecting it into the exhaust gases of an engine |
| CN102597445A (en) * | 2009-09-10 | 2012-07-18 | 标致·雪铁龙汽车公司 | Device and method for regulating the injection of a quantity of reducer in the gaseous phase |
| CN103321718A (en) * | 2012-03-20 | 2013-09-25 | 罗伯特·博世有限公司 | Method and control unit for metering fuel into an exhaust gas duct |
| CN104508279A (en) * | 2012-04-05 | 2015-04-08 | 西港能源有限公司 | Method and apparatus for controlling fuel pressure in a gaseous fuelled internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20190064470A (en) | 2019-06-10 |
| DE102017221577A1 (en) | 2019-06-06 |
| KR102580091B1 (en) | 2023-09-19 |
| CN109854346B (en) | 2022-06-03 |
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