CN117167168A - A self-cleaning method and system for air intake heating grille based on road map durability test - Google Patents
A self-cleaning method and system for air intake heating grille based on road map durability test Download PDFInfo
- Publication number
- CN117167168A CN117167168A CN202311146785.9A CN202311146785A CN117167168A CN 117167168 A CN117167168 A CN 117167168A CN 202311146785 A CN202311146785 A CN 202311146785A CN 117167168 A CN117167168 A CN 117167168A
- Authority
- CN
- China
- Prior art keywords
- carbon
- engine
- heating
- grille
- air intake
- 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
-
- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
Landscapes
- Testing Of Engines (AREA)
Abstract
本发明公开了一种基于路谱耐久试验的进气加热格栅自清洁方法及系统，涉及进气系统清洁技术领域。该方法包括步骤：获取发动机的转速和扭矩，并根据转速和扭矩计算发动机烟度；对发动机进行路谱耐久试验，称重计算加热格栅的积碳附着量；根据构建发动机烟度、加热格栅的积碳附着量和路谱耐久试验结果构建进气加热格栅积碳模型；利用进气加热格栅积碳模型对加热格栅上的积碳进行附着量计算，根据计算结果结合车辆发动机状态对积碳进行加热。本发明在未引入外部设备的前提下，进一步降低了清洁成本，实现了高效的积碳清洁。
The invention discloses a self-cleaning method and system for an air intake heating grille based on a road map durability test, and relates to the technical field of air intake system cleaning. The method includes the steps of: obtaining the engine's rotational speed and torque, and calculating the engine smoke based on the rotational speed and torque; conducting a roadmap durability test on the engine, and weighing to calculate the amount of carbon deposits attached to the heating grille; constructing the engine smoke, heating grille Based on the carbon deposition amount of the grille and the road map durability test results, a carbon deposition model of the air intake heating grille is constructed; the carbon deposition amount of the air intake heating grille is calculated using the intake air heating grille carbon deposition model, and the carbon deposition amount on the heating grille is calculated based on the calculation results combined with the vehicle engine The state heats the carbon deposits. The present invention further reduces cleaning costs and achieves efficient carbon deposit cleaning without introducing external equipment.
Description
Technical Field
The invention relates to the technical field of cleaning of air inlet systems, in particular to an air inlet heating grid self-cleaning method and system based on a road spectrum endurance test.
Background
Part of exhaust gas discharged by an EGR engine after combustion work is re-sent to an intake manifold to be mixed with fresh air, and the mixture enters a cylinder for combustion. Carbon deposition generated by waste combustion is easy to adhere to the surface of the heating grid, and after accumulation, the air inlet efficiency is affected. There are many existing means of removing carbon deposits, but additional removal equipment or cleaning agents are required. In the method for removing carbon deposit from the nozzle of an aeroengine, for example, in the patent of publication number CN103639156a, a series of methods including mechanical scraping, high-pressure oil impact, chemical cleaning and ultrasonic cleaning are used to remove carbon deposit from the engine, but the method is completed by mechanical equipment other than the engine, or additional chemical reagent is needed, the cleaning step is complex and the cleaned device needs to be disassembled, so that the application scenario is limited, and the cleaning cost is greatly increased.
It has been found that carbon deposits produced by EGR type engines can burn out at 600 c, while the intake heating grid heats up to 850 c and above. The carbon deposit can be regularly removed by heating the air inlet heating grid. However, the large carbon deposit adhesion amount on the air-intake heating grid is difficult to calculate without disassembling the air-intake heating grid, and long-time high-temperature heating can not only increase the battery power consumption, but also affect the service life of the heating grid. Therefore, how to realize the accurate calculation of the deposited carbon adhesion amount and the self-adaptive mileage cleaning according to the deposited carbon adhesion amount without dismantling the air inlet heating grid becomes the technical problem to be solved in the prior art.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide an air inlet heating grid self-cleaning method and system based on a road spectrum endurance test, which calculate the carbon deposition attached quantity of a heating grid in real time according to road spectrum working conditions, and perform self-adaptive mileage carbon deposition cleaning according to the carbon deposition attached quantity by using a carbon deposition attached quantity model, so that the cleaning cost is further reduced and efficient carbon deposition cleaning is realized on the premise of not introducing external equipment.
In order to achieve the above object, the present invention is realized by the following technical scheme:
the invention provides an air inlet heating grid self-cleaning method based on a road spectrum endurance test, which comprises the following steps of:
acquiring the rotating speed and the torque of an engine, and calculating the smoke intensity of the engine according to the rotating speed and the torque;
carrying out a road spectrum endurance test on the engine, and weighing and calculating the carbon deposition adhesion quantity of the heating grid;
constructing an air inlet heating grid carbon deposition model according to the smoke intensity of the constructed engine, the carbon deposition adhesion quantity of the heating grid and the road spectrum endurance test result;
carrying out adhesion quantity calculation on carbon deposition on the heating grid by utilizing an air inlet heating grid carbon deposition model;
and heating the carbon deposit according to the calculation result and the vehicle engine state, wherein a heating time inflection point is calculated according to the relation between the heating time and the carbon deposit, and the heating time is confirmed according to the relation between the heating time inflection point and the engine power deviation requirement.
Further, engine smoke is calculated by performing a universal characteristic test on the engine mount.
Further, the calculated carbon deposit adhesion amount of the heating grid is equal to the difference between the weighing result of disassembling the air inlet heating grid after the road spectrum endurance test and the weighing result of disassembling the air inlet heating grid before the road spectrum endurance test.
Further, a road spectrum durability test is performed on the engine according to a transient driving cycle of the engine.
Further, the specific steps of constructing the intake heating grid carbon deposition model according to the results of the tests of the engine smoke intensity, the carbon deposition adhesion quantity of the heating grid and the road spectrum durability are as follows:
constructing a preliminary air inlet heating grid carbon deposition model according to the smoke intensity and the carbon deposition adhesion quantity of the heating grid;
calculating a correction coefficient according to the road spectrum endurance test result;
and correcting the preliminary air inlet heating grid carbon deposition model by using the correction coefficient to obtain a final air inlet heating grid carbon deposition model.
Further, the corrected intake heating grid carbon deposition model is:
Y＝M/Σf(nk,mk)*Σf(ni,mi)；
wherein Y is the predicted carbon deposit adhering quantity, M is the weighing result of the carbon deposit adhering quantity in the road spectrum endurance test, ni and mi respectively represent the acquired rotation speed value and torque value of the ith second of the engine, and nk and mk respectively represent the rotation speed value and torque value of the kth second of the engine in the road spectrum endurance test.
Further, the specific steps of carrying out adhesion calculation on carbon deposition on the heating grids by utilizing the air inlet heating grid carbon deposition model are as follows:
setting a limit value of the carbon deposit adhesion quantity;
calculating the carbon deposition adhesion quantity of carbon deposition on the current heating grid according to the air inlet heating grid carbon deposition model;
and when the calculated result is greater than or equal to the carbon deposit adhesion limit value, judging that the combustion state of the carbon deposit is needed.
Further, the specific steps of heating the carbon deposit according to the calculation result and the vehicle engine state are as follows:
if the air inlet heating grid carbon deposition model judges that the carbon deposition needs to be combusted, and the engine is in a stop idle state, heating the heating grid to perform carbon deposition combustion; if the air inlet heating grid carbon deposition model judges that the carbon deposition needs to be burnt, but the whole vehicle is still in the running process, the heating grid is heated to burn the carbon deposition after the whole vehicle is electrified next time.
Further, an engine power degradation limit is calculated using the relationship between engine power and carbon deposit amount, and the carbon deposit amount limit is checked from the engine power degradation limit.
The second aspect of the invention provides an air inlet heating grid self-cleaning system based on a road spectrum endurance test, which comprises the following components:
a smoke calculation module configured to obtain a rotational speed and a torque of the engine, and calculate an engine smoke according to the rotational speed and the torque;
the road spectrum testing module is configured to carry out road spectrum endurance test on the engine, and weigh and calculate the carbon deposition adhesion quantity of the heating grid;
the model construction module is configured to construct an air inlet heating grid carbon deposition model according to the smoke intensity of the engine, the carbon deposition adhesion quantity of the heating grid and the road spectrum endurance test result;
the carbon deposition cleaning module is configured to calculate the adhesion quantity of carbon deposition on the heating grid by utilizing an air inlet heating grid carbon deposition model, and heat the carbon deposition according to the calculation result and the vehicle engine state, wherein a heating time inflection point is calculated according to the relation between the heating time and the carbon deposition quantity, and the heating time is confirmed according to the relation between the heating time inflection point and the engine power deviation requirement.
The one or more of the above technical solutions have the following beneficial effects:
the invention discloses an air inlet heating grid self-cleaning method and an air inlet heating grid self-cleaning system based on a road spectrum endurance test, which are characterized in that an air inlet heating grid carbon deposition model is constructed by utilizing the principle that a heating grid can reach carbon deposition combustion temperature, the carbon deposition attachment quantity of the heating grid is monitored in real time, and the heating grid is utilized for carbon deposition combustion when carbon deposition is accumulated to a certain extent, so that under the condition that external equipment is not introduced, self-adaptive mileage combustion removal of carbon deposition is realized through optimal combustion time and optimal carbon deposition attachment quantity, and the excellent effects of improving carbon deposition removal efficiency, reducing cost and prolonging the service life of an engine are achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a flow chart of a self-cleaning method of an air intake heating grid based on a road spectrum endurance test in a first embodiment of the invention;
FIG. 2 is a schematic diagram of smoke intensity corresponding to an engine at different rotation speeds and torques according to a first embodiment of the present invention;
FIG. 3 is a graph showing the relationship between engine power, heating time and carbon deposit amount in accordance with the first embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Term interpretation:
an intake heating grill: the temperature of the air inlet can be rapidly increased by resistance heating, and the temperature can reach 850 ℃ or above during heating.
Carbon deposition: the Exhaust Gas Recirculation (EGR) waste has carbon smoke, is easy to adhere to the surface of the heating grid, influences air inlet efficiency, and can be burnt at 600 ℃.
Embodiment one:
the first embodiment of the invention provides an air inlet heating grid self-cleaning method based on a road spectrum endurance test, which is as shown in fig. 1, wherein the smoke intensity of the position of the air inlet heating grid under the universal working condition is tested through a bench, and then the carbon deposition weighing test of the heating grid is carried out through the road spectrum endurance test. And establishing a carbon deposition model according to the weighing test result of the universal smoke intensity and road spectrum endurance test and the carbon deposition weighing condition. And calculating the carbon deposition attached quantity of the heating grid according to the carbon deposition model by the market vehicle to be tested, judging whether the carbon deposition attached quantity reaches a specified value, if so, judging whether the engine is idling and whether the vehicle speed is 0, and if not, continuing to monitor the carbon deposition attached quantity of the heating grid. When the engine is in an idle state and the vehicle speed is 0. And heating and burning the heating grids for carbon deposition for t minutes, or else, stopping the whole vehicle and powering up again, and heating and burning the heating grids for t minutes. The carbon deposit can be removed at 600 ℃, the temperature of the air inlet heating grid can reach 850 ℃ and above, and the surface carbon deposit can be removed by heating. According to the carbon deposition cleaning method, the carbon deposition attachment quantity of the heating grid is calculated in real time according to the road spectrum working condition, and the mileage is not calculated, so that the carbon deposition attachment quantity of the heating grid can be monitored in real time, the optimal power is output, and the effect of high-efficiency combustion carbon deposition is achieved.
The embodiment specifically comprises the following steps:
and step 1, acquiring the rotating speed and the torque of the engine, and calculating the smoke intensity of the engine according to the rotating speed and the torque.
In this embodiment, the engine smoke level is calculated by performing a universal characteristic test on the engine mount. In the universal characteristic test process, the interval of the rotating speed n is 600-1900r/min, and the interval is 100r/min; the torque m interval is 100-2600 N.m, and the interval is 200 N.m. The corresponding smoke intensity of the engine at different rotation speeds and torques is shown in fig. 2.
The engine speed n, the torque m and the smoke intensity y are used for constructing the function relation between the smoke intensity and the speed and torque as follows:
y＝f(n,m)＝a1*ni2+a2*mi2+a3*ni*mi+a4ni+a5*mi+a6
where ni and mi represent the rotational speed and torque values, respectively, of the engine for the ith second, where the values of the coefficients a1, a2, a3, a4, a5 and a6 can be found by the least squares method.
And 2, carrying out a road spectrum endurance test on the engine, and weighing and calculating the carbon deposit adhesion quantity of the heating grid.
In this example, a 500 h-path spectrum durability test was performed on the engine according to the transient driving cycle of the engine. The carbon deposition attachment amount M of the heating grid calculated by weighing in the road spectrum endurance test is equal to the difference between the weighing result M2 of the intake heating grid disassembled after the road spectrum endurance test and the weighing result M1 of the intake heating grid disassembled before the road spectrum endurance test: m=m2-M1.
The 500h spectrum durability carbon deposit adhesion amount Y' =Σf (nk, mk), where nk and mk are the rotational speed and torque values of the kth second of the engine in the 500h spectrum durability, respectively, is predicted.
And 3, constructing an air inlet heating grid carbon deposition model according to the smoke intensity of the constructed engine, the carbon deposition adhesion quantity of the heating grid and the road spectrum endurance test result.
In this embodiment, the specific steps are as follows:
(1) Constructing a preliminary air inlet heating grid carbon deposition model according to the smoke intensity and the carbon deposition adhesion quantity of the heating grid:
Y＝Σf(ni,mi),
where ni and mi represent the number of revolutions per second and the torque value of the engine, respectively.
(2) Calculating a correction coefficient A according to the road spectrum endurance test result:
A＝M/Σf(nk,mk)，
wherein A is a correction coefficient, M is a carbon deposition adhesion amount weighing result of the road spectrum endurance test, and nk and mk are respectively expressed as the rotating speed and torque values of the engine per second in the road spectrum endurance test.
And correcting the preliminary air inlet heating grid carbon deposition model by using the correction coefficient to obtain a final air inlet heating grid carbon deposition model. The corrected carbon deposition model of the air inlet heating grid is as follows:
Y＝M/Σf(nk,mk)*Σf(ni,mi)；
wherein Y is the predicted carbon deposit adhering quantity, M is the weighing result of the carbon deposit adhering quantity in the road spectrum endurance test, ni and mi respectively represent the collected rotational speed value and torque value of the engine per second, and nk and mk respectively represent the rotational speed value and torque value of the engine per second in the road spectrum endurance test.
And 4, calculating the adhesion quantity of carbon deposited on the heating grids by using an air inlet heating grid carbon deposition model, and heating the carbon deposited according to the calculation result and the vehicle engine state, wherein a heating time inflection point is calculated according to the relation between the heating time and the carbon-containing adhesion quantity, and the heating time is confirmed according to the relation between the heating time inflection point and the engine power deviation requirement. An engine power degradation limit is calculated using the relationship between engine power and carbon deposit amount, and the carbon deposit amount limit is checked from the engine power degradation limit.
In this embodiment, the market vehicle determines whether to heat and burn carbon based on the calculation result of the intake heating grid carbon model, and specifically includes the steps of:
setting a limit value of the carbon deposit adhesion quantity;
calculating the carbon deposition adhesion quantity of carbon deposition on the current heating grid according to the air inlet heating grid carbon deposition model;
and when the calculated result is greater than or equal to the carbon deposit adhesion limit value, judging that the combustion state of the carbon deposit is needed.
If the air inlet heating grid carbon deposition model judges that the carbon deposition needs to be burnt and the engine is in a stop idle state, heating the heating grid to burn the carbon deposition, wherein the time is t minutes; if the air inlet heating grid carbon deposition model judges that the carbon deposition needs to be burnt, but the whole vehicle is still in the running process, the heating grid is heated to burn the carbon deposition after the whole vehicle is electrified next time, and the time is t minutes.
Adhesion limit value confirmation: the engine power and the carbon-containing deposit amount are plotted, and deposit amount limit values are confirmed from the engine power degradation limit values, as shown in fig. 3, using a least square method to obtain a specific functional relationship:
P(Y)＝b1×Y2+b2×Y+b3，
wherein P is engine power, Y is carbon-containing adhesion amount, b1 and b2 are coefficients, and b3 is a constant.
Combustion time t confirms: drawing a relation diagram of heating time and carbon-containing adhesion quantity, confirming the heating time according to a heating time inflection point and an engine power deviation requirement, and if the heating time inflection point corresponds to the engine power higher than the deviation requirement, determining the heating time as the inflection point time; if the heating time inflection point corresponds to the engine power being lower than the deviation requirement, the heating time is a heating time value corresponding to the engine power deviation value, as shown in fig. 3, and a specific functional relation is obtained by using a least square method:
Y(t)＝c1×t2+c2×t+C3，
wherein Y is carbon-containing adhesion amount, t is heating time, c1 and c2 are coefficients, and c3 is a constant.
Embodiment two:
the second embodiment of the invention provides an air inlet heating grid self-cleaning system based on a road spectrum endurance test, which comprises the following components:
a smoke calculation module configured to obtain a rotational speed and a torque of the engine, and calculate an engine smoke according to the rotational speed and the torque;
the road spectrum testing module is configured to carry out road spectrum endurance test on the engine, and weigh and calculate the carbon deposition adhesion quantity of the heating grid;
the model construction module is configured to construct an air inlet heating grid carbon deposition model according to the smoke intensity of the engine, the carbon deposition adhesion quantity of the heating grid and the road spectrum endurance test result;
and the carbon deposition cleaning module is configured to calculate the adhesion amount of carbon deposition on the heating grid by utilizing the air inlet heating grid carbon deposition model, and heat the carbon deposition according to the calculation result and the state of the engine of the vehicle.
The steps involved in the second embodiment correspond to those of the first embodiment, and reference is made to the relevant description of the first embodiment for the implementation manner.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311146785.9A CN117167168A (en) | 2023-09-06 | 2023-09-06 | A self-cleaning method and system for air intake heating grille based on road map durability test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311146785.9A CN117167168A (en) | 2023-09-06 | 2023-09-06 | A self-cleaning method and system for air intake heating grille based on road map durability test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117167168A true CN117167168A (en) | 2023-12-05 |
Family
ID=88939155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311146785.9A Pending CN117167168A (en) | 2023-09-06 | 2023-09-06 | A self-cleaning method and system for air intake heating grille based on road map durability test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117167168A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120592755A (en) * | 2025-07-07 | 2025-09-05 | 北京科技职业大学 | Method and device for correcting engine performance based on carbon deposit amount in exhaust duct |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB845708A (en) * | 1955-12-12 | 1960-08-24 | Massey Ferguson Inc | Improvements in air intake systems of internal combustion engines |
| TW201007006A (en) * | 2008-08-13 | 2010-02-16 | Kao Hsin Entpr Co Ltd | Method for removing deposition of carbon on exhaust pipe of diesel engine |
| WO2013037087A1 (en) * | 2011-09-15 | 2013-03-21 | Ding Yuntao | Preparation method for catalyst on surface of work piece in combustion chamber of internal combustion engine |
| US20160186655A1 (en) * | 2013-09-02 | 2016-06-30 | Xinyu Liu | On-line cleaning system and control method for carbon deposit in engine intake valve and combustion chamber |
| CN108506092A (en) * | 2017-02-28 | 2018-09-07 | 株式会社斯巴鲁 | Engine control system |
| CN110080879A (en) * | 2019-04-01 | 2019-08-02 | 东风汽车集团有限公司 | A kind of direct fuel-injection engine fuel injector carbon distribution automatically cleaning control method |
| CN209510463U (en) * | 2019-01-03 | 2019-10-18 | 深圳市前海万绿源环保科技有限公司 | An engine combustion enhancer capable of removing carbon deposits |
-
2023
- 2023-09-06 CN CN202311146785.9A patent/CN117167168A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB845708A (en) * | 1955-12-12 | 1960-08-24 | Massey Ferguson Inc | Improvements in air intake systems of internal combustion engines |
| TW201007006A (en) * | 2008-08-13 | 2010-02-16 | Kao Hsin Entpr Co Ltd | Method for removing deposition of carbon on exhaust pipe of diesel engine |
| WO2013037087A1 (en) * | 2011-09-15 | 2013-03-21 | Ding Yuntao | Preparation method for catalyst on surface of work piece in combustion chamber of internal combustion engine |
| US20160186655A1 (en) * | 2013-09-02 | 2016-06-30 | Xinyu Liu | On-line cleaning system and control method for carbon deposit in engine intake valve and combustion chamber |
| CN108506092A (en) * | 2017-02-28 | 2018-09-07 | 株式会社斯巴鲁 | Engine control system |
| CN209510463U (en) * | 2019-01-03 | 2019-10-18 | 深圳市前海万绿源环保科技有限公司 | An engine combustion enhancer capable of removing carbon deposits |
| CN110080879A (en) * | 2019-04-01 | 2019-08-02 | 东风汽车集团有限公司 | A kind of direct fuel-injection engine fuel injector carbon distribution automatically cleaning control method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120592755A (en) * | 2025-07-07 | 2025-09-05 | 北京科技职业大学 | Method and device for correcting engine performance based on carbon deposit amount in exhaust duct |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113504050B (en) | Carbon deposition and coking test method and device for EGR (exhaust gas Recirculation) system | |
| CN101220760B (en) | Oxygen-Based Particulate Filter Regeneration Strategies | |
| CN113432880B (en) | System and method for testing heavy-duty vehicle exhaust fuel consumption based on engine bench | |
| CN109667642B (en) | A judging method for DPF regeneration of diesel engine | |
| CN117167168A (en) | A self-cleaning method and system for air intake heating grille based on road map durability test | |
| CN104863679A (en) | DPF system carbon loading capacity estimation and blocking state judgment method | |
| CN108150300A (en) | A kind of modification method and device of Diesel NOx original row model value | |
| CN113864027B (en) | A DPF post-treatment system and its driving regeneration control method | |
| CN112163334A (en) | DPF carbon loading capacity off-line calibration method based on primary exhaust of heavy diesel engine | |
| CN106050413A (en) | Non-dismantling automobile intake and exhaust system cleaning and carbon removing method for automobile | |
| CN114778120A (en) | Rapid aging method for diesel vehicle tail gas aftertreatment system | |
| CN114720140A (en) | Intelligent diagnosis and treatment method and system for motor vehicle tail gas | |
| CN114033534A (en) | SCR conversion efficiency recovery method and device and vehicle | |
| CN115324696B (en) | Smoke intensity control method and device and vehicle | |
| CN210977638U (en) | DPF carrier soot and ash cleaning device | |
| CN114834434B (en) | Hybrid vehicle control device | |
| US7594940B2 (en) | Electrically heated particulate filter diagnostic systems and methods | |
| CN118732661A (en) | A method for developing SCR aftertreatment control strategy for internal combustion engines based on hardware-in-the-loop | |
| CN111456836A (en) | Method and device for reducing exhaust emission of engine | |
| US20220403767A1 (en) | Control device and control method for internal combustion engine | |
| US12517013B2 (en) | Misfire detection method and control unit of an internal combustion engine | |
| CN118722459B (en) | Method and related device for detecting state of heater of vehicle | |
| CN113834662B (en) | Method for verifying influence of variable oil injection angle of engine on PN number | |
| CN114962037B (en) | Method for judging effectiveness of wide-area oxygen sensor in hybrid vehicle engine | |
| CN114838943A (en) | Diesel engine exhaust throttle valve durability test method |
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 |