CN106640290A - Urea box heating water valve control method and system - Google Patents
Urea box heating water valve control method and system Download PDFInfo
- Publication number
- CN106640290A CN106640290A CN201610979412.3A CN201610979412A CN106640290A CN 106640290 A CN106640290 A CN 106640290A CN 201610979412 A CN201610979412 A CN 201610979412A CN 106640290 A CN106640290 A CN 106640290A
- Authority
- CN
- China
- Prior art keywords
- ecu
- water valve
- hot water
- threshold value
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- 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
- 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
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
- F01N2610/105—Control thereof
-
- 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
- F01N2610/1486—Means to prevent the substance from freezing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to a urea box heating water valve control method. The method particularly comprises the steps that the environment temperature is measured; when the environment temperature is lower than a calibrated temperature, it is considered that a urea solution is frozen, and the heating water valve is switched on once each time when an ECU is powered on once at the moment to heat a urea box; when the environment temperature is higher than the calibrated temperature, it is considered that the urea solution is not frozen, an ECU power-on frequency threshold value is set at the moment, and if the ECU power-on frequency is larger than or equal to the power-on frequency threshold value, the heating water valve is switched on to prevent the condition that the heating water valve is blocked due to the fact that the heating water valve does not act for a long time, and if the ECU power-on frequency is smaller than the power-on frequency threshold value, the heating water valve is not switched on.
Description
Technical field
The present invention relates to a kind of urea box adds hot water valve control method and system.
Background technology
To meet state four and more maximum discharge requirement, existing Diesel engine generally eliminates post processing tail using SCR technology
Nitrogen oxides in gas.SCR technology needs extracted urea solution to process nitrogen oxides, but environment temperature it is very low when, urine
Plain solution can freeze, and to prevent the generation of such case, need molten come heating urea with engine cooling water (80 DEG C -90 DEG C)
Liquid.Current control mode is：Every time ((Electronic Control Unit) electronic control unit, is automobile specified to ECU
Microcomputerized controller, is also automobile specified single-chip microcomputer) on electricity after, plus the action of hot water valve horse back once (urea freeze in the case of,
Urea water valve always on can be closed just until the urea liquid for freezing melts；In the case of urea is non-icing, urea
Plus shut again after several seconds after hot water valve unlatching).But urea liquid simultaneously need not be heated all the time, when its temperature reach it is higher by (15
DEG C) when, the heating for stopping urea liquid being needed, prevent it from going bad.Based on current mode of heating, plus the action of hot water valve is more
Frequently, have occurred that a large amount of urea boxes plus hot water valve are damaged and urea box long-time heating causes urea quality to become on market
The situation that difference and urea box are damaged (is soaked, service life is very in solution of the urea box material over time in temperature more than 50 DEG C
It is short).In addition, inevitably containing metal fillings and a small amount of grit and silt in engine cooling water.If plus hot water valve action
Excessively frequently, then the probability that the silt because depositing causes movement parts to be not closed completely can be increased.Go down year in year out, if movement parts
Be not closed completely, then engine cooling water all the time can heating urea solution, will also result in urea liquid quality variation and urea box be old
The consequence of change.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that a kind of urea box adds hot water valve control method and system, effectively carries
High urea box adds the service life of hot water valve and urea box, while realizing the intelligent heating to urea liquid.
To achieve these goals, the present invention adopts following scheme：
A kind of urea box adds hot water valve control method, it is characterised in that：Measuring environment temperature first, when environment temperature is less than
When demarcating temperature, it is believed that icing of urea solution, now ECU often goes up electricity once plus hot water valve is turned on once, for urea box
Heated；When environment temperature is more than temperature is demarcated, it is believed that urea liquid does not freeze, electric frequency threshold value on ECU is now set,
If the upper electricity number of times of ECU is more than or equal to upper electric frequency threshold value, plus hot water valve is opened, for preventing from adding hot water valve long-time motionless
Make and be stuck；If the upper electricity number of times of ECU is less than upper electric frequency threshold value, plus hot water valve is not opened.
The scope for demarcating temperature is -5 DEG C to -10 DEG C.
Electric frequency threshold value on the setting ECU is replaced with into setting ECU power-on time threshold values；When environment temperature is more than demarcation
During temperature, it is believed that urea liquid does not freeze, if ECU power-on times are more than or equal to power-on time threshold value, plus hot water valve is opened,
For preventing plus hot water valve long-time is failure to actuate and is stuck；If ECU power-on times are less than power-on time threshold value, plus hot water valve
Do not open.
Electric frequency threshold value on the setting ECU is replaced with into setting driving time threshold value；When environment temperature is more than demarcation temperature
When spending, it is believed that urea liquid does not freeze, if driving time is more than or equal to driving time threshold value, plus hot water valve is opened, and is used for
Prevent plus hot water valve long-time is failure to actuate and is stuck；If driving time is less than driving time threshold value, plus hot water valve is not opened.
Diesel engine ECU currently on the market adopts EDC17 (or the same generation product), and its internal master chip is ARM
(32).ECU (Electronic Control Unit) electronic control unit, is automobile specified microcomputerized controller, is also automobile
Special single-chip microcomputer.
Present invention additionally comprises a kind of urea box adds hot water valve control system：Including ECU and temperature sensor；Temperature sensor
For measuring environment temperature；Its measurement result is connected with the first comparator port of ECU, is compared by the comparator port of ECU
Environment temperature and the size demarcated between temperature；When environment temperature is less than temperature is demarcated, ECU often goes up electricity and once adds hot water valve just
Open once；When environment temperature is more than or equal to temperature is demarcated, the counter port of ECU starts, for electric number of times on ECU
Counted；Its count results is connected with the second comparator port of ECU, compare on ECU electric number of times and upper electric frequency threshold value it
Between size, when electric number of times is more than or equal to upper electric frequency threshold value on ECU, drives plus hot water valve opened, for preventing heating
Water valve long-time is failure to actuate and is stuck；When electric number of times is less than upper electric frequency threshold value on ECU, plus hot water valve is not opened.
When environment temperature is more than or equal to temperature is demarcated, the timer port of ECU starts, for ECU power-on times
Carry out timing；Its timing result is connected with the second comparator port of ECU, compare ECU power-on times and power-on time threshold value it
Between size, when ECU power-on times be more than or equal to power-on time threshold value when, drive plus hot water valve open, for prevent heating
Water valve long-time is failure to actuate and is stuck；When ECU power-on times are less than power-on time threshold value, plus hot water valve is not opened.
When environment temperature is more than or equal to temperature is demarcated, the timer port of ECU starts, for carrying out to driving time
Timing；Its timing result is connected with the second comparator port of ECU, compares big between driving time and driving time threshold value
It is little, when driving time is more than or equal to driving time threshold value, drives plus hot water valve is opened, for preventing from adding hot water valve long-time
It is failure to actuate and is stuck；When driving time is less than driving time threshold value, plus hot water valve is not opened.
Temperature sensor is passed using temperature sensor, such as environment temperature sensor, urea level temperature is carried in engine
Sensor；Intake air temperature sensor；Urea pump temperature sensor；Measurement temperature in machine oil, fuel oil, water temperature and after-treatment components
Sensor.All there is said temperature sensor in the Diesel engine just dispatched from the factory per platform, belong to the standard configuration of Diesel engine.
Beneficial effects of the present invention：
(1) when environment temperature is higher than temperature is demarcated, according to electric number of times, ECU power-on times or driving time control on ECU
Plus the action of hot water valve, the service life of Urea water valve not only can be greatly prolonged.When being also prevented from adding hot water valve long
Between it is motionless and be stuck.
(2) according to electric number of times, ECU power-on times or driving time control plus the action of hot water valve on ECU, water valve is reduced
The abrasion of movement parts, also reduces the probability that movement parts are not closed completely.
(3) when environment temperature is higher than temperature is demarcated, urea liquid is not heated, so as to prevent the change of urea liquid
Matter.
(4) when environment temperature is higher than temperature is demarcated, urea liquid is not heated, so as to prevent the aging of urea box.
(5) using the ECU and temperature sensor carried in engine, without extra hardware, hardware cost is saved.
Description of the drawings
Fig. 1 is existing plus hot water valve control method schematic diagram；
Fig. 2 is that the present invention's plus hot water valve control control method principle schematic；
Fig. 3 is method of the present invention flow chart.
Specific embodiment：
Below in conjunction with the accompanying drawings the invention will be further described with embodiment.
Existing plus hot water valve control mode is：To prevent plus hot water valve long-time is failure to actuate and is stuck, electricity on ECU mono-
Just there is the instruction for adding hot water valve action request, as shown in Figure 1.When environment temperature is higher, plus hot water valve can be closed at once；Work as ring
When border temperature is relatively low, plus just close after the urea that hot water valve can be in urea box melts.
The present invention's adds hot water valve control principle as shown in Figure 2：
A kind of urea box adds hot water valve control method, first measuring environment temperature, when environment temperature is less than temperature is demarcated,
Think icing of urea solution, now ECU often goes up electricity once plus hot water valve is turned on once, for heating to urea box；When
When environment temperature is more than temperature is demarcated, it is believed that urea liquid does not freeze, electric frequency threshold value on ECU is now set, if electricity on ECU
Number is more than or equal to upper electric frequency threshold value, then plus hot water valve is opened, for preventing plus hot water valve long-time is failure to actuate and is stuck；
If the upper electricity number of times of ECU is less than upper electric frequency threshold value, plus hot water valve is not opened.
Because the freezing temperature of standard urea solution (concentration 32.5%) is -11 DEG C, it is considered to sensor accuracy and deviation, demarcate
The value of temperature is advised between -5 DEG C to -10 DEG C.
Electric frequency threshold value on the setting ECU can be replaced with setting ECU power-on time threshold values；When environment temperature is more than
When demarcating temperature, it is believed that urea liquid does not freeze, if ECU power-on times are more than or equal to power-on time threshold value, plus hot water valve
Open, for preventing plus hot water valve long-time is failure to actuate and is stuck；If ECU power-on times are less than power-on time threshold value, plus
Hot water valve is not opened.
Electric frequency threshold value on the setting ECU can also be replaced with setting driving time threshold value；When environment temperature is more than
When demarcating temperature, it is believed that urea liquid does not freeze, if driving time is more than or equal to driving time threshold value, plus hot water valve is beaten
Open, for preventing plus hot water valve long-time is failure to actuate and is stuck；If driving time is less than driving time threshold value, plus hot water valve
Do not open.
Hot water valve control system is added based on a kind of urea box of said method：Including ECU and temperature sensor.TEMP
Device is used for measuring environment temperature；Its measurement result is connected with the first comparator port of ECU, by the comparator port ratio of ECU
Compared with environment temperature and the size demarcated between temperature；When environment temperature is less than temperature is demarcated, ECU often goes up electricity once plus hot water valve
Turn on once；When environment temperature is more than or equal to temperature is demarcated, the counter port of ECU starts, for electricity on ECU
Number is counted；Its count results is connected with the second comparator port of ECU, compares electric number of times and upper electric frequency threshold value on ECU
Between size, when electric number of times is more than or equal to upper electric frequency threshold value on ECU, drives plus hot water valve opened, for preventing plus
Hot water valve long-time is failure to actuate and is stuck；When electric number of times is less than upper electric frequency threshold value on ECU, plus hot water valve is not opened.
When environment temperature is more than or equal to temperature is demarcated, the timer port of ECU starts, for ECU power-on times
Carry out timing；Its timing result is connected with the second comparator port of ECU, compare ECU power-on times and power-on time threshold value it
Between size, when ECU power-on times be more than or equal to power-on time threshold value when, drive plus hot water valve open, for prevent heating
Water valve long-time is failure to actuate and is stuck；When ECU power-on times are less than power-on time threshold value, plus hot water valve is not opened.
When environment temperature is more than or equal to temperature is demarcated, the timer port of ECU starts, for carrying out to driving time
Timing；Its timing result is connected with the second comparator port of ECU, compares big between driving time and driving time threshold value
It is little, when driving time is more than or equal to driving time threshold value, drives plus hot water valve is opened, for preventing from adding hot water valve long-time
It is failure to actuate and is stuck；When driving time is less than driving time threshold value, plus hot water valve is not opened.
Temperature sensor is passed using temperature sensor, such as environment temperature sensor, urea level temperature is carried in engine
Sensor；Intake air temperature sensor；Urea pump temperature sensor；Measurement temperature in machine oil, fuel oil, water temperature and after-treatment components
Sensor.All there is said temperature sensor in the Diesel engine just dispatched from the factory per platform, belong to the standard configuration of Diesel engine.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to present invention protection model
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (8)
1. a kind of urea box adds hot water valve control method, it is characterised in that：First measuring environment temperature, marks when environment temperature is less than
When constant temperature is spent, it is believed that icing of urea solution, now ECU often goes up electricity once plus hot water valve is turned on once, for entering to urea box
Row heating；When environment temperature is more than temperature is demarcated, it is believed that urea liquid does not freeze, electric frequency threshold value on ECU is now set, if
The upper electricity number of times of ECU is more than or equal to upper electric frequency threshold value, then add hot water valve to open, for preventing from adding hot water valve long-time to be failure to actuate
And be stuck；If the upper electricity number of times of ECU is less than upper electric frequency threshold value, plus hot water valve is not opened.
2. method according to claim 1, it is characterised in that：The scope for demarcating temperature is -5 DEG C to -10 DEG C.
3. method according to claim 1, it is characterised in that：Electric frequency threshold value on the setting ECU is replaced with into setting
ECU power-on time threshold values；When environment temperature is more than temperature is demarcated, it is believed that urea liquid does not freeze, if ECU power-on times are more than
Or equal to power-on time threshold value, then plus hot water valve is opened, for preventing plus hot water valve long-time is failure to actuate and is stuck；If ECU
Power-on time is less than power-on time threshold value, then add hot water valve not open.
4. method according to claim 1, it is characterised in that：Electric frequency threshold value on the setting ECU is replaced with into setting
Driving time threshold value；When environment temperature is more than temperature is demarcated, it is believed that urea liquid does not freeze, if driving time is more than or equal to
Driving time threshold value, then plus hot water valve is opened, for preventing plus hot water valve long-time is failure to actuate and is stuck；If driving time is little
In driving time threshold value, then hot water valve is added not open.
5. hot water valve control system is added based on a kind of urea box described in claim 1：It is characterized in that：Including ECU and temperature
Sensor, temperature sensor is used for measuring environment temperature；Its measurement result is connected with the first comparator port of ECU, by ECU
Comparator port compare environment temperature and demarcate temperature between size；When environment temperature is less than temperature is demarcated, ECU often goes up
Electricity is once plus hot water valve is turned on once；When environment temperature is more than or equal to temperature is demarcated, the counter port of ECU starts,
For counting to electric number of times on ECU；Its count results is connected with the second comparator port of ECU, compares electric number of times on ECU
And the size between upper electric frequency threshold value, when electric number of times is more than or equal to upper electric frequency threshold value on ECU, drives plus hot water valve is beaten
Open, for preventing plus hot water valve long-time is failure to actuate and is stuck；When electric number of times is less than upper electric frequency threshold value on ECU, heating
Water valve is not opened.
6. system according to claim 5, it is characterised in that：When environment temperature is more than or equal to temperature is demarcated, ECU's
Timer port starts, for carrying out timing to ECU power-on times；Its timing result is connected with the second comparator port of ECU,
Size relatively between ECU power-on times and power-on time threshold value, when ECU power-on times are more than or equal to power-on time threshold value
When, drive plus hot water valve is opened, for preventing plus hot water valve long-time is failure to actuate and is stuck；When ECU power-on times are less than upper
During electric time threshold, plus hot water valve is not opened.
7. system according to claim 5, it is characterised in that：When environment temperature is more than or equal to temperature is demarcated, ECU's
Timer port starts, for carrying out timing to driving time；Its timing result is connected with the second comparator port of ECU, than
Compared with the size between driving time and driving time threshold value, when driving time is more than or equal to driving time threshold value, drives and add
Hot water valve is opened, for preventing plus hot water valve long-time is failure to actuate and is stuck；When driving time is less than driving time threshold value,
Plus hot water valve is not opened.
8. system according to claim 5, it is characterised in that temperature sensor is sensed using in-engine environment temperature
Device, urea level temperature sensor, intake air temperature sensor or urea pump temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610979412.3A CN106640290A (en) | 2016-11-07 | 2016-11-07 | Urea box heating water valve control method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610979412.3A CN106640290A (en) | 2016-11-07 | 2016-11-07 | Urea box heating water valve control method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106640290A true CN106640290A (en) | 2017-05-10 |
Family
ID=58806652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610979412.3A Pending CN106640290A (en) | 2016-11-07 | 2016-11-07 | Urea box heating water valve control method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106640290A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110284948A (en) * | 2019-06-29 | 2019-09-27 | 潍柴动力股份有限公司 | A kind of control method of SCR system |
| CN112554998A (en) * | 2020-11-30 | 2021-03-26 | 潍柴动力股份有限公司 | Anti-adhesion control method and device for urea box heating electromagnetic valve and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01249940A (en) * | 1988-03-30 | 1989-10-05 | Kokusan Denki Co Ltd | Controller for internal combustion engine |
| EP0930428A2 (en) * | 1998-01-16 | 1999-07-21 | Pierburg Aktiengesellschaft | Exhaust gas recirculation valve |
| CN102985650A (en) * | 2010-05-25 | 2013-03-20 | 五十铃自动车株式会社 | Selective catalytic reduction apparatus |
| CN103321735A (en) * | 2013-07-02 | 2013-09-25 | 湖南南车时代电动汽车股份有限公司 | Engine cooling method and engine cooling system device for hybrid electric buses |
-
2016
- 2016-11-07 CN CN201610979412.3A patent/CN106640290A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01249940A (en) * | 1988-03-30 | 1989-10-05 | Kokusan Denki Co Ltd | Controller for internal combustion engine |
| EP0930428A2 (en) * | 1998-01-16 | 1999-07-21 | Pierburg Aktiengesellschaft | Exhaust gas recirculation valve |
| CN102985650A (en) * | 2010-05-25 | 2013-03-20 | 五十铃自动车株式会社 | Selective catalytic reduction apparatus |
| CN103321735A (en) * | 2013-07-02 | 2013-09-25 | 湖南南车时代电动汽车股份有限公司 | Engine cooling method and engine cooling system device for hybrid electric buses |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110284948A (en) * | 2019-06-29 | 2019-09-27 | 潍柴动力股份有限公司 | A kind of control method of SCR system |
| CN112554998A (en) * | 2020-11-30 | 2021-03-26 | 潍柴动力股份有限公司 | Anti-adhesion control method and device for urea box heating electromagnetic valve and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109899137B (en) | Control method and device for removing urea crystals by SCR system | |
| US7147693B2 (en) | Engine exhaust gas purification device | |
| JP3824828B2 (en) | Engine control device | |
| JP6508475B2 (en) | Diagnostic device | |
| WO2014115620A1 (en) | Urea water pipe clogging detection device for urea scr | |
| EP3098412B1 (en) | Aqueous urea solution supply device and aqueous urea solution supply method for internal combustion engine | |
| KR101758582B1 (en) | Method for checking a temperature sensor in an scr exhaust gas post-treatment system | |
| CN102892989B (en) | The effectiveness diagnostic system of urea water temperature sensor | |
| JP5748026B2 (en) | Control device for additive supply system | |
| CN110132381A (en) | Venturi differential pressure pickup credibility diagnostic method and device | |
| JP2015078643A (en) | Exhaust purification device of internal combustion engine | |
| CN102741532B (en) | The control gear of internal-combustion engine | |
| CN110230530A (en) | The method, apparatus and system of engine SCR system pipeline heating | |
| CN106640290A (en) | Urea box heating water valve control method and system | |
| CN107542555A (en) | Vehicle exhaust recirculating system opens ice mode control method | |
| US10844768B2 (en) | Abnormality determination device | |
| CN103511048A (en) | Emission monitoring and controlling method and device of OBD system | |
| JP2010185345A (en) | Heater control device | |
| CN107097659A (en) | A kind of diagnostic system and diagnostic method of new-energy automobile heat management system | |
| CN209855885U (en) | Control device for removing urea crystals by SCR system | |
| JP6350604B2 (en) | Exhaust gas purification system for internal combustion engine | |
| CN111305933B (en) | Urea injection device, urea tank for heating urea and heating method | |
| CN114483262A (en) | Urea pump, and control method and control system for urea pump | |
| CN112262253B (en) | Dynamic monitoring of the flow of a liquid additive injected into a motor vehicle exhaust gas treatment system | |
| CN114370317B (en) | Control method of urea pump, urea pump and engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170510 |