CN113756918B - Engine control method, engine control device and vehicle - Google Patents

Engine control method, engine control device and vehicle Download PDF

Info

Publication number
CN113756918B
CN113756918B CN202111117199.2A CN202111117199A CN113756918B CN 113756918 B CN113756918 B CN 113756918B CN 202111117199 A CN202111117199 A CN 202111117199A CN 113756918 B CN113756918 B CN 113756918B
Authority
CN
China
Prior art keywords
catalytic conversion
conversion device
controlling
heating
efficiency value
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.)
Active
Application number
CN202111117199.2A
Other languages
Chinese (zh)
Other versions
CN113756918A (en
Inventor
郭云杰
缪丰隆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Deutz Power Co Ltd
Original Assignee
Hunan Deutz Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hunan Deutz Power Co Ltd filed Critical Hunan Deutz Power Co Ltd
Priority to CN202111117199.2A priority Critical patent/CN113756918B/en
Publication of CN113756918A publication Critical patent/CN113756918A/en
Priority to PCT/CN2022/098026 priority patent/WO2023045413A1/en
Application granted granted Critical
Publication of CN113756918B publication Critical patent/CN113756918B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • 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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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

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)

Abstract

The invention provides an engine control method, an engine control device and a vehicle, wherein the engine comprises a heating device, an injection device and a catalytic conversion device, and the engine control method comprises the following steps: obtaining an efficiency value of a catalytic conversion device; and controlling the working states of the heating device, the injection device and the catalytic conversion device according to the efficiency value of the catalytic conversion device. The working states of the heating device, the injection device and the catalytic conversion device are controlled through different efficiency values, so that the working states of the catalytic conversion device can be detected at different temperatures, whether the sulfur poisoning condition exists in the engine or not can be determined, and the poisoning degree of the engine can be identified.

Description

Engine control method, engine control device and vehicle
Technical Field
The invention belongs to the technical field of engines, and particularly relates to an engine control method, an engine control device and a vehicle.
Background
China has higher standard for the emission of nitrogen and oxygen in engine tail gas, so the requirement for diesel oil is higher, but a lot of diesel oil which does not meet the requirement exist in the market, and if the diesel oil with poorer quality is adopted, the problems of sulfur poisoning, excessive emission and the like exist, so the use experience of users is influenced.
Disclosure of Invention
The present invention has been made to solve one of the technical problems occurring in the prior art or the related art.
To this end, a first aspect of the invention proposes an engine control method, the engine including a heating device, an injection device, and a catalytic conversion device, the engine control method comprising: obtaining an efficiency value of a catalytic conversion device; and controlling the working states of the heating device, the injection device and the catalytic conversion device according to the efficiency value of the catalytic conversion device.
The engine control method provided by the invention has the advantages that the engine comprises the heating device, the injection device and the catalytic conversion device, wherein the heating device is used for heating the inlet of the catalytic conversion device, the injection device is used for injecting urea, the detection of the efficiency value of the catalytic conversion device can represent whether sulfur poisoning exists in the post-treatment of the engine, and the detection can be understood that the use efficiency of the catalytic conversion device can be reduced, the torque limit of a vehicle-mounted automatic diagnosis system is reduced, the vehicle speed is reduced, the use efficiency of the engine is reduced, and the driving experience of a user is influenced.
According to the engine control method, the inlet of the catalytic conversion device is heated through the heating device, so that the inlet temperature of the catalytic conversion device of the engine is increased, the working state of the catalytic conversion device is judged at different temperatures, whether the sulfur poisoning condition exists in the engine or not is determined, and the poisoning degree is specifically judged.
Specifically, through the efficiency value of the catalytic conversion device who obtains to according to the operating condition of catalytic conversion device's efficiency value control heating device, injection apparatus and catalytic conversion device, through obtaining the efficiency value of catalytic conversion device, can make when the efficiency value of different catalytic conversion device, control heating device heats the temperature to different to catalytic conversion device's import, and control injection apparatus sprays or does not spray urea, and control catalytic conversion device normally works or stop working.
It is understood that the efficiency value reduction of the catalytic converter may be caused not only by sulfur poisoning but also by states such as crystallization, so that in the process of determining sulfur poisoning of the catalytic converter, other states such as crystallization and hydrocarbon adsorption need to be discharged, so that the current state of the catalytic converter can be determined more accurately.
In particular, the heating of the heating device specifically includes heating the inlet of the catalytic conversion device to different temperatures, and it is understood that the inlet of the catalytic conversion device is heated to different temperatures, so as to better detect whether the efficiency value of the catalytic conversion device is low or not caused by other factors (such as crystallization, hydrocarbon adsorption and the like). The specific work of the injection device comprises the injection of urea or the stop of the injection of the urea, and the stop of the injection of the urea by the injection device is mainly controlled to avoid the generation of crystals under the condition of low efficiency value of the catalytic conversion device. The normal work or the stop work of the catalytic conversion device is mainly controlled in order to control the catalytic conversion device to perform closed-loop control in the detection work if ammonia escapes, and meanwhile, the catalytic conversion device is controlled to stop work when the catalytic conversion device is judged to be in an aging state, and the catalytic conversion device is controlled to normally work under other conditions, so that the detection of the efficiency value of the catalytic conversion device is realized, and whether the engine is poisoned or not is judged and the toxicity degree of the engine is judged.
The reason why the heating device is turned on to heat the inlet of the catalytic converter when the efficiency value of the catalytic converter is judged to be lower than the normal level and the injection device is not turned on immediately while heating is because if the injection device is turned on to inject urea at the same time, the generation amount and generation speed of crystals may be increased and the subsequent erroneous judgment of the sulfur poisoning condition of the catalytic converter may be caused in the case where the efficiency of the catalytic converter is low, and therefore, the injection device is not turned on at the initial stage of starting heating but is turned on after a certain period of time.
Specifically, in this application, through the operating condition of different efficiency value control heating device, injection apparatus and catalytic conversion device, can carry out hierarchical discernment to catalytic conversion device's sulfur poisoning condition, improved the discernment efficiency, the injection yield that can furthest reduction regeneration simultaneously reduces the machine oil and dilutes the risk, can deal with the problem of the inefficiency of the catalytic conversion device of different degrees (including the condition of sulfur poisoning, crystallization, hydrocarbon absorption etc.).
It can be understood that the emission requirement of China on nitrogen and oxygen emission of an engine is strict at present, in the application process of the engine, if a user uses diesel oil which does not meet the national standard, the emission exceeds the standard, so that sulfur poisoning of a catalytic conversion device is caused, an on-board automatic diagnosis system gives an alarm, a torque limit and a speed limit are generated, in the market, a plurality of diesel oils which do not meet the national standard exist, and if the diesel oil is purchased carelessly, the phenomenon is likely to occur.
In addition, according to the engine control method provided by the above technical solution of the present invention, the following additional technical features are provided:
in one possible design, controlling the operating states of the heating device, the injection device, and the catalytic conversion device in accordance with the efficiency value of the catalytic conversion device includes: when the efficiency value of the catalytic conversion device is smaller than a first threshold value, controlling the injection device to stop injecting the urea; when the efficiency value of the catalytic conversion device is larger than a second threshold value, controlling the catalytic conversion device to be closed, and controlling the injection device to perform urea de-injection; wherein the first threshold is less than the second threshold.
In this design, specifically, when the efficiency value of the catalytic conversion device is smaller than a first threshold, indicating that the efficiency value of the catalytic conversion device is low at this time, the injection device is controlled to stop injecting urea, the efficiency value of the catalytic conversion device is detected again after a period of time, whether the efficiency value of the catalytic conversion device is larger than a second threshold is determined, and when the efficiency value of the catalytic conversion device is larger than the second threshold, the ammonia slip state is determined, the catalytic conversion device is controlled to perform closed-loop control, and the injection device is controlled to stop injecting urea.
Specifically, the first threshold is smaller than the second threshold, that is, when the efficiency value of the catalytic converter is judged to be low, the injection device is controlled to stop injecting urea, then whether the efficiency value of the catalytic converter is higher than the second threshold or not is judged within a certain time, and when the efficiency value of the catalytic converter is higher than the second threshold, the efficiency of the catalytic converter is judged to be caused by the ammonia slip to be too high at the moment.
In one possible design, controlling the operating states of the heating device, the injection device, and the catalytic conversion device according to the efficiency value of the catalytic conversion device includes: and when the efficiency value of the catalytic conversion device is smaller than or equal to a second threshold value, controlling the heating device to heat the inlet of the catalytic conversion device, controlling the injection device to work and controlling the catalytic conversion device to work.
In the design, when the efficiency value of the catalytic conversion device is smaller than the second threshold value, the thermal management system is started, the heating device is controlled to start working, the inlet temperature of the catalytic conversion device is heated through the heating device, so that the poisoning degree of the engine can be judged at different temperatures, and it can be understood that misjudgment on the engine poisoning condition caused by crystallization and other conditions can be avoided at different temperatures, and the accuracy of judging the poisoning condition is realized.
Specifically, heating device in this application specifically is thermal management system, can also realize the invariant to the temperature or with temperature control in the within range of predetermined temperature when realizing the heating to guaranteed the accurate nature of testing result, that is to say, after control heating device begins to work in this application, thermal management system is worked always, thereby provides stable detection environment for catalytic conversion device's detection.
In one possible design, controlling the heating device to heat the inlet of the catalytic conversion device, controlling the injection device to operate, and controlling the catalytic conversion device to operate includes: and controlling the heating device to heat the inlet of the catalytic conversion device to a first preset temperature, and controlling the injection device to inject urea after the heating device starts heating for a first preset time.
In this design, control of the operating state of the heating means and the injection means is specifically defined when it is determined that the efficiency value of the catalytic conversion means is equal to or less than the second threshold value.
Specifically, when the efficiency value of the catalytic conversion device is judged to be less than or equal to the second threshold value, the heating device is controlled to heat the inlet temperature of the catalytic conversion device to the first preset temperature, and it can be understood that at the beginning of heating the catalytic conversion device, the increase of the growth rate and the growth amount of the crystal is avoided, the injection device is stopped to inject for the first preset time, and the urea is normally injected after the first preset time, and meanwhile, the heating is continuously continued until the inlet temperature of the catalytic conversion device is increased to the first preset temperature. It will be appreciated that the thermal management system is always operational and after the temperature reaches the first predetermined temperature, the thermal management system is thermostatically controlled to control the temperature at or within a certain range of the first predetermined temperature.
In one possible design, when the inlet temperature of the catalytic conversion device reaches a first preset temperature and the efficiency value of the catalytic conversion device is greater than a third threshold value, determining that the catalytic conversion device is in a first working state; wherein the third threshold is less than the second threshold.
In this design, after the inlet of the catalytic converter is heated to a first preset temperature by the heating device, the efficiency value of the catalytic converter needs to be detected, so as to realize specific judgment on the engine poisoning state. Specifically, after the determination that the second threshold is met and the thermal management system is started, a further determination of a third threshold is performed, and the third threshold is smaller than the second threshold, in order to improve detection accuracy and avoid misdetermination caused by other situations, and when the inlet temperature of the catalytic conversion device reaches a first preset temperature and the efficiency value of the catalytic conversion device is greater than the third threshold, the catalytic conversion device is determined to be in a first working state, wherein the first working state is a slight poisoning or hydrocarbon adsorption state or a slight crystallization state of the engine.
In one possible design, the control method further includes: when the inlet temperature of the catalytic conversion device reaches a first preset temperature and the efficiency value of the catalytic conversion device is smaller than or equal to a third threshold value, controlling the injection device to stop injecting urea, controlling the heating device to heat the inlet of the catalytic conversion device to a second preset temperature, and controlling the injection device to inject urea after a second preset time from the beginning of heating of the heating device; wherein the second preset temperature is greater than the first preset temperature; the second preset time is less than the first preset time.
In this design, after the heating device heats the inlet of the catalytic converter to the first preset temperature, if it is determined that the efficiency value of the catalytic converter is less than or equal to the third threshold, the inlet of the catalytic converter needs to be further heated to a second preset temperature, and a further determination of poisoning condition is performed, where the second preset temperature is higher than the first preset temperature, that is, the inlet temperature of the catalytic converter is raised again to a second preset temperature higher than the first preset temperature, and therefore, the possibility of slight sulfur poisoning of the engine has been eliminated, so that the inlet temperature of the catalytic converter is raised to perform further detection.
Similarly, in order to avoid the generation of the crystal amount, the injection device is controlled to start the injection of urea after a second preset time from the start of the temperature rise heating.
Specifically, the second preset temperature is higher than the first preset temperature, and the first preset time is shorter than the second preset time, it can be understood that, in the process of raising the catalytic converter to the second preset temperature, on the basis of the first preset temperature, the heating power is increased to raise the inlet temperature of the catalytic converter to the second preset temperature, and the time for heating to raise the temperature from the first preset temperature to the second preset temperature is obviously shorter than the time for starting to raise the temperature to the first preset temperature.
In one possible design, when the inlet of the catalytic conversion device is heated to a second preset temperature by the heating device and the efficiency value of the catalytic conversion device is greater than a third threshold value, the catalytic conversion device is determined to be in a second working state; wherein the third threshold is less than the second threshold.
In the design, the efficiency value of the catalytic conversion device is determined again after the inlet temperature of the catalytic conversion device reaches the second preset temperature, and when the efficiency value of the catalytic conversion device is larger than the third threshold value, the engine is determined to be in a medium sulfur poisoning or crystallization state at the moment, so that the judgment of different poisoning degrees is realized.
In one possible design, when the heating device heats the inlet of the catalytic conversion device to a second preset temperature and the efficiency value of the catalytic conversion device is smaller than or equal to a third threshold value, the injection device is controlled to stop injecting the urea, the heating device is controlled to heat the inlet of the catalytic conversion device to a third preset temperature, and the injection device is controlled to inject the urea after a third preset time from the beginning of heating of the heating device; wherein the third preset temperature is greater than the second preset temperature; the third preset time is less than the second preset time.
In this design, when the inlet temperature of the catalytic converter reaches the second threshold value and the efficiency value of the catalytic converter is equal to or less than the third threshold value, the inlet of the catalytic converter needs to be further heated and heated from the second preset temperature to the third preset temperature, and it can be understood that the increase in the growth rate and the increase in the amount of crystals are similarly avoided, and the injection device stops injecting urea for the third preset time, specifically, urea is not injected until after the third preset time from the time when the temperature of the inlet of the catalytic converter starts to increase from the second preset temperature.
In one possible design, when the heating device heats the inlet of the catalytic conversion device to a third preset temperature and the efficiency value of the catalytic conversion device is greater than a third threshold value, the catalytic conversion device is determined to be in a third working state.
In this design, after the inlet temperature of the catalytic conversion device reaches the third preset temperature, the relationship between the efficiency value of the catalytic conversion device and the third threshold value is determined again, and specifically, when it is determined that the efficiency of the catalytic conversion device is greater than the third threshold value, it is determined that the engine is in a heavily sulfur-poisoned state at this time. And when the efficiency value of the catalytic conversion device is smaller than a third threshold value, controlling the injection device to stop injecting the urea and determining that the catalytic conversion device is in a deterioration state.
Specifically, the third preset temperature is higher than the second preset temperature, and the third preset time is shorter than the second preset time, it can be understood that in the process of raising the catalytic converter to the third preset temperature, on the basis of the second preset temperature, the heating power is increased to raise the inlet temperature of the catalytic converter to the third preset temperature, and the time for raising the temperature from the second preset temperature to the third preset temperature is obviously shorter than the time for raising the temperature from the first preset temperature to the second preset temperature.
In one possible design, the engine further includes a counting device for obtaining an efficiency value interval of the catalytic conversion device, and the counting device specifically includes: an increase in the efficiency value of the catalytic conversion device is determined based on an increase in a value of a counting device of the engine.
In this design, the engine further includes a counting device, wherein the value displayed by the counting device is used to determine an increase or decrease in the efficiency of the catalytic conversion device. Specifically, when the counting device value increases, it indicates that the efficiency value of the catalytic conversion device increases, and when the counting device value decreases, it indicates that the efficiency of the catalytic conversion device decreases, and counts the values after the counting device increases or decreases, when the counting device value is a positive number, it indicates that the efficiency value of the catalytic conversion device is greater than a first threshold, and when the counting device value is a negative number, it indicates that the efficiency value of the catalytic conversion device is equal to or less than the first threshold.
A second aspect of the present invention provides an engine control apparatus, comprising a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the engine control method according to any one of the preceding claims, so that the engine control apparatus has all the advantages of the engine control method according to any one of the preceding claims.
A third aspect of the invention proposes a vehicle comprising an engine control device, thus having all the advantageous technical effects of an engine control device.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows one of the flowcharts of the engine control method in the embodiment of the invention;
FIG. 2 illustrates a second flowchart of an engine control method in an embodiment of the present invention;
FIG. 3 shows a third flowchart of an engine control method in an embodiment of the present invention;
FIG. 4 shows the fourth flowchart of the engine control method in the embodiment of the invention;
fig. 5 shows a schematic block diagram of an engine control apparatus according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
An engine control method and an engine control apparatus 500 according to some embodiments of the present invention will be described below with reference to fig. 1 to 5.
The first embodiment is as follows:
as shown in fig. 1, according to a first aspect of the present invention, there is provided an engine control method, the engine including a heating device, an injection device, and a catalytic conversion device. The specific engine control method comprises the following steps:
102, acquiring an efficiency value of a catalytic conversion device;
and 104, controlling the working states of the heating device, the injection device and the catalytic conversion device according to the efficiency value of the catalytic conversion device.
According to the engine control method provided by the embodiment of the invention, the engine comprises the heating device, the injection device and the catalytic conversion device, wherein the heating device is used for heating the inlet of the catalytic conversion device, the injection device is used for injecting urea, and the detection of the efficiency value of the catalytic conversion device can represent whether sulfur poisoning exists in the post-treatment of the engine.
According to the engine control method, the inlet of the catalytic conversion device is heated through the heating device, so that the inlet temperature of the catalytic conversion device of the engine is increased, the efficiency value of the catalytic conversion device is detected at different temperatures, and whether the sulfur poisoning condition of the engine is identified or not is determined.
Specifically, through the efficiency value of the catalytic conversion device who obtains to according to the operating condition of catalytic conversion device's efficiency value control heating device, injection apparatus and catalytic conversion device, through obtaining the efficiency value of catalytic conversion device, can make when the efficiency value of different catalytic conversion device, control heating device heats the temperature to different to catalytic conversion device's import, and control injection apparatus sprays or does not spray urea, and control catalytic conversion device normally works or stop working.
It is understood that the efficiency value reduction of the catalytic converter may be caused not only by sulfur poisoning but also by states such as crystallization, so that in the process of judging sulfur poisoning of the catalytic converter, other states such as crystallization and hydrocarbon adsorption need to be discharged, so that the current state of the catalytic converter can be judged more accurately.
In particular, the heating of the heating device specifically includes heating the inlet of the catalytic conversion device to different temperatures, and it is understood that the inlet of the catalytic conversion device is heated to different temperatures, so as to better detect whether the efficiency value of the catalytic conversion device is low or not caused by other factors (such as crystallization, hydrocarbon adsorption and the like). The specific work of the injection device comprises the injection of urea or the stop of the injection of the urea, and the stop of the injection of the urea by the injection device is mainly controlled to avoid the generation of crystals under the condition of low efficiency value of the catalytic conversion device. The normal work or the stop work of the catalytic conversion device is mainly controlled in order to control the catalytic conversion device to perform closed-loop control in the detection work if ammonia escapes, and meanwhile, the catalytic conversion device is controlled to stop work when the catalytic conversion device is judged to be in an aging state, and the catalytic conversion device is controlled to normally work under other conditions, so that the detection of the efficiency value of the catalytic conversion device is realized, and whether the engine is poisoned or not is judged and the toxicity degree of the engine is judged.
The reason why the heating device is turned on to heat the inlet of the catalytic converter when the efficiency value of the catalytic converter is judged to be lower than the normal level and the injection device is not turned on immediately while heating is because if the injection device is turned on to inject urea at the same time, the generation amount and generation speed of crystals may be increased and the subsequent erroneous judgment of the sulfur poisoning condition of the catalytic converter may be caused in the case where the efficiency of the catalytic converter is low, and therefore, the injection device is not turned on at the initial stage of starting heating but is turned on after a certain period of time.
Specifically, in this application, through the operating condition of different efficiency value control heating device, injection apparatus and catalytic conversion device, can carry out hierarchical discernment to catalytic conversion device's sulfur poisoning condition, improved the discernment efficiency, the injection yield that can furthest reduction regeneration simultaneously reduces the machine oil and dilutes the risk, can deal with the problem of the inefficiency of the catalytic conversion device of different degrees (including the condition of sulfur poisoning, crystallization, hydrocarbon absorption etc.).
It can be understood that the emission requirement of China on nitrogen and oxygen emission of an engine is strict at present, in the application process of the engine, if a user uses diesel oil which does not meet the national standard, the emission exceeds the standard, so that sulfur poisoning of a catalytic conversion device is caused, an on-board automatic diagnosis system gives an alarm, a torque limit and a speed limit are generated, in the market, a plurality of diesel oils which do not meet the national standard exist, and if the diesel oil is purchased carelessly, the phenomenon is likely to occur.
The second embodiment:
as shown in fig. 2, according to an embodiment of the present invention, there is provided an engine control method including:
step 202, judging whether the efficiency value of the catalytic conversion device is larger than a first threshold value or not; if yes, go to step 204, otherwise go to step 206;
step 204, repeatedly detecting the efficiency value of the catalytic conversion device;
step 206, controlling the injection device to stop injecting urea;
and 208, controlling the catalytic conversion device to be closed and controlling the injection device to reduce the urea injection when the efficiency value of the catalytic conversion device is larger than a second threshold value.
In the embodiment, when the efficiency value of the catalytic conversion device is smaller than a first threshold value, which indicates that the efficiency value of the catalytic conversion device is lower at the moment, the injection device is controlled to stop injecting the urea, the efficiency value of the catalytic conversion device is detected again after a period of time, whether the efficiency value of the catalytic conversion device is larger than a second threshold value or not is judged, and when the efficiency value of the catalytic conversion device is larger than the second threshold value, an ammonia escape state is judged, the catalytic conversion device is controlled to be in a closed-loop control state, and the injection device is controlled to stop injecting the urea.
Specifically, the first threshold is smaller than the second threshold, that is, when the efficiency value of the catalytic converter is judged to be low, the injection device is controlled to stop injecting urea, then whether the efficiency value of the catalytic converter is higher than the second threshold or not is judged within a certain time, and when the efficiency value of the catalytic converter is higher than the second threshold, the efficiency of the catalytic converter is judged to be caused by the ammonia slip to be too high at the moment.
Example three:
on the basis of the second embodiment, as shown in fig. 3, the engine control method further includes:
step 302, judging whether the efficiency value of the catalytic conversion device is larger than a first threshold value; if yes, go to step 304; if not, go to step 306;
step 304, repeatedly acquiring the efficiency value of the catalytic conversion device;
step 306, controlling the injection device to stop injecting urea;
step 308, judging whether the efficiency value of the catalytic conversion device is larger than a second threshold value; if yes, go to step 310, otherwise, go to step 312;
step 310, controlling the catalytic conversion device to be closed, and controlling the injection device to reduce the urea injection amount;
step 312, controlling the heating device to heat the inlet of the catalytic converter to a first preset temperature, and controlling the injection device to inject urea after a first preset time from the start of heating by the heating device;
step 314, judging whether the efficiency value of the catalytic conversion device is larger than a third threshold value; if yes, go to step 316, otherwise go to step 318;
step 316, setting the catalytic converter in a first working state;
step 318, controlling the injection device to stop injecting the urea, controlling the heating device to heat the inlet of the catalytic conversion device to a second preset temperature, and controlling the injection device to inject the urea after a second preset time from the beginning of heating of the heating device;
step 320, judging whether the efficiency value of the catalytic conversion device is larger than a third threshold value; if yes, go to step 322, otherwise go to step 324;
322, setting the catalytic converter in a second working state;
step 324, controlling the injection device to stop injecting urea, controlling the heating device to heat the inlet of the catalytic conversion device to a third preset temperature, and controlling the injection device to inject urea after a third preset time from the beginning of heating of the heating device;
step 326, determining whether the efficiency value of the catalytic conversion device is greater than a third threshold value; if yes, go to step 328, otherwise go to step 330;
328, determining that the catalytic conversion device is in a third working state;
step 330, determining that the catalytic conversion device is in a fourth working state;
the second threshold value is larger than the first threshold value, and the second threshold value is larger than the third threshold value;
the first preset temperature is lower than the second preset temperature, and the second preset temperature is lower than the third preset temperature.
In this embodiment, when the efficiency value of the catalytic conversion device is smaller than the second threshold, the thermal management system is started, the heating device is controlled to start working, the inlet temperature of the catalytic conversion device is heated by the heating device, so that the poisoning degree of the engine at different temperatures is judged, and it can be understood that the erroneous judgment of the poisoning condition of the engine caused by the conditions such as crystallization can be avoided at different temperatures, so that the accuracy of the judgment of the poisoning condition is realized.
Specifically, heating device in this application specifically is thermal management system, can also realize the constancy of temperature or with temperature control in the within range of predetermined temperature when realizing the heating to guaranteed the accurate nature of testing result, that is to say, after control heating device begins to work in this application, thermal management system is worked always, thereby provides stable detection environment for catalytic conversion device's detection.
Specifically, when the efficiency value of the catalytic conversion device is judged to be less than or equal to the second threshold value, the heating device is controlled to heat the inlet temperature of the catalytic conversion device to the first preset temperature, and it can be understood that at the beginning of heating the catalytic conversion device, the increase of the growth rate and the growth amount of the crystals is avoided, the injection device is stopped to inject for the first preset time, and urea is normally injected after the first preset time, and meanwhile, the heating is continued until the inlet temperature of the catalytic conversion device is increased to the first preset temperature. It will be appreciated that the thermal management system is always operational and after the temperature reaches the first predetermined temperature, the thermal management system is thermostatically controlled to control the temperature at or within a certain range of the first predetermined temperature.
After the inlet of the catalytic conversion device is heated to the first preset temperature by the heating device, the efficiency value of the catalytic conversion device needs to be detected, so that the specific judgment on the engine poisoning state is realized. Specifically, after the second threshold is determined to be met and the thermal management system is started, a further determination of the third threshold is performed, and the third threshold is smaller than the second threshold, so as to improve the detection accuracy and avoid misjudgment caused by other situations, and when the inlet temperature of the catalytic conversion device reaches a first preset temperature and the efficiency value of the catalytic conversion device is greater than the third threshold, the catalytic conversion device is determined to be in a first working state, wherein the first working state is a light poisoning or hydrocarbon adsorption state or a light micro crystallization state of the engine.
After the heating device heats the inlet of the catalytic conversion device to the first preset temperature, if the efficiency value of the catalytic conversion device is judged to be smaller than or equal to the third threshold value, the inlet of the catalytic conversion device needs to be continuously heated to the second preset temperature at the moment, and further poisoning condition judgment is carried out, wherein the second preset temperature is higher than the first preset temperature, namely, the inlet temperature of the catalytic conversion device is increased again to the second preset temperature higher than the first preset temperature, so that the possibility of slight sulfur poisoning of the engine is eliminated, and the inlet temperature of the catalytic conversion device is increased to further detect.
Similarly, in order to avoid the generation of the crystallization amount, the injection device is controlled to start the injection of urea after a second preset time from the start of the temperature rise heating.
Specifically, the second preset temperature is higher than the first preset temperature, and the first preset time is shorter than the second preset time, it can be understood that, in the process of raising the catalytic converter to the second preset temperature, on the basis of the first preset temperature, the heating power is increased to raise the inlet temperature of the catalytic converter to the second preset temperature, and the time for heating to raise the temperature from the first preset temperature to the second preset temperature is obviously shorter than the time for starting to raise the temperature to the first preset temperature.
And judging the efficiency value of the catalytic conversion device again after the inlet temperature of the catalytic conversion device reaches a second preset temperature, and determining that the engine is in a moderate sulfur poisoning or crystallization state at the moment when the efficiency value of the catalytic conversion device is greater than a third threshold value, so that the judgment of different poisoning degrees is realized.
When the inlet temperature of the catalytic conversion device reaches the second threshold value and the efficiency value of the catalytic conversion device is smaller than or equal to the third threshold value, the inlet of the catalytic conversion device needs to be further heated, and the catalytic conversion device is heated from the second preset temperature to the third preset temperature.
And after the inlet temperature of the catalytic conversion device reaches a third preset temperature, judging the relation between the efficiency value of the catalytic conversion device and a third threshold value again, and specifically, when the efficiency of the catalytic conversion device is judged to be greater than the third threshold value, determining that the engine is in a severe sulfur poisoning state at the moment. And when the efficiency value of the catalytic conversion device is smaller than a third threshold value, controlling the injection device to stop injecting the urea and determining that the catalytic conversion device is in a deterioration state.
Specifically, the third preset temperature is higher than the second preset temperature, and the third preset time is shorter than the second preset time, it can be understood that in the process of raising the catalytic converter to the third preset temperature, on the basis of the second preset temperature, the heating power is increased to raise the inlet temperature of the catalytic converter to the third preset temperature, and the time for raising the temperature from the second preset temperature to the third preset temperature is obviously shorter than the time for raising the temperature from the first preset temperature to the second preset temperature.
In a specific embodiment, the first threshold may be equal to the third threshold, specifically, the first threshold and the third threshold may be 1, and the second threshold may be 2, and of course, in other embodiments, the first threshold and the third threshold are different, and the value and the size relationship of the specific threshold are adaptively adjusted according to the actual engine type and the operating condition requirement.
In one embodiment, the first predetermined temperature may be about 450 ℃. The second preset temperature may be about 550 ℃, the third preset temperature may be about 600 ℃, and of course, specific values of the first preset temperature, the second preset temperature, and the third preset temperature may be adjusted according to actual conditions.
Specifically, the specific values of the first preset time, the second preset time and the third preset time can be adjusted according to the actual situation.
Example four: as shown in fig. 4, according to an embodiment of the present invention, the step of determining whether the efficiency value of the catalytic converter is greater than the first threshold specifically comprises:
step 402, judging whether the numerical value of the counting device is increased, if so, turning to step 404, otherwise, turning to step 406;
step 404, increasing the value;
step 406, the value is decreased;
step 408, judging whether the numerical value of the counting device is positive, if so, turning to step 410, otherwise, turning to step 412;
step 410, the efficiency value of the catalytic conversion device is larger than a first threshold value;
in step 412, the efficiency value of the catalytic conversion device is less than or equal to a first threshold.
In this embodiment, the engine further comprises a counting device, wherein the value displayed by the counting device is used to determine an increase or decrease in the efficiency of the catalytic conversion device. Specifically, taking as an example the determination of whether the efficiency value of the catalytic conversion device is greater than the first threshold value, when the counting device number increases, it indicates that the efficiency value of the catalytic conversion device increases, and when the counting device number decreases, it indicates that the efficiency of the catalytic conversion device decreases. And when the numerical value of the counting device is a positive number, the efficiency value of the catalytic conversion device is larger than a first threshold value, and when the numerical value of the counting device is a negative number, the efficiency value of the catalytic conversion device is smaller than or equal to the first threshold value.
Example five:
as shown in fig. 5, according to the embodiment of the second aspect of the present invention, an engine control device 500 is proposed, which comprises a memory 502 and a processor 504, wherein the memory stores a computer program, and the processor executes the computer program to perform the engine control method according to any one of the preceding claims, so that the engine control device has all the advantages of any one of the engine control methods.
Example six:
an embodiment of the third aspect of the invention proposes a vehicle comprising the above-mentioned engine control device, which therefore has all the advantageous technical effects of the engine control device.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps, after comprehending the spirit of the present invention.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
In the claims, specification and drawings of the present application, the term "plurality" means two or more, unless explicitly defined otherwise, the terms "upper", "lower", and the like refer to the same orientation or positional relationship as is shown in the drawings for convenience in describing the present application and to facilitate the description, but do not indicate or imply that the device or element so referred to must have the particular orientation described, be constructed and operated in the particular orientation, and thus the description should not be construed as limiting the present application; the terms "connect," "install," "fix," and the like are to be understood broadly, for example, "connect" may be a fixed connection between a plurality of objects, a detachable connection between a plurality of objects, or an integral connection; the connection between a plurality of objects may be direct or indirect via an intermediate. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art based on the above data.
In the claims, specification, and drawings that follow the present disclosure, the description of the terms "one embodiment," "some embodiments," "specific embodiments," and so forth, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In the claims, specification and drawings of the present invention, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An engine control method characterized in that the engine includes a heating device, an injection device, and a catalytic conversion device, the engine control method comprising:
obtaining an efficiency value of the catalytic conversion device;
controlling the working states of the heating device, the injection device and the catalytic conversion device according to the efficiency value of the catalytic conversion device;
controlling the operating states of the heating device, the injection device, and the catalytic conversion device according to the efficiency value of the catalytic conversion device includes:
when the efficiency value of the catalytic conversion device is smaller than or equal to a second threshold value, controlling the heating device to heat the inlet of the catalytic conversion device, controlling the injection device to work and controlling the catalytic conversion device to work;
the controlling the heating device to heat the inlet of the catalytic conversion device, the controlling the injection device to work, and the controlling the catalytic conversion device to work comprises:
and controlling the heating device to heat the inlet of the catalytic conversion device to a first preset temperature, and controlling the injection device to inject urea after the heating device starts heating for a first preset time.
2. The engine control method according to claim 1, characterized in that controlling the operating states of the heating device, the injection device, and the catalytic conversion device in accordance with an efficiency value of the catalytic conversion device includes:
when the efficiency value of the catalytic conversion device is smaller than a first threshold value, controlling the injection device to stop injecting urea;
when the efficiency value of the catalytic conversion device is larger than a second threshold value, controlling the catalytic conversion device to be closed, and controlling the injection device to reduce the injection of urea;
wherein the first threshold is less than the second threshold.
3. The engine control method according to claim 1, characterized by further comprising:
when the inlet temperature of the catalytic conversion device reaches the first preset temperature and the efficiency value of the catalytic conversion device is larger than a third threshold value, determining that the catalytic conversion device is in a first working state;
wherein the third threshold is less than the second threshold.
4. The engine control method according to claim 3, characterized by further comprising:
when the inlet temperature of the catalytic conversion device reaches the first preset temperature and the efficiency value of the catalytic conversion device is smaller than or equal to a third threshold value, controlling the injection device to stop injecting urea, controlling the heating device to heat the inlet of the catalytic conversion device to a second preset temperature, and controlling the injection device to inject urea after a second preset time from the beginning of heating of the heating device;
wherein the second preset temperature is greater than the first preset temperature;
the second preset time is less than the first preset time.
5. The engine control method according to claim 4, characterized by further comprising:
when the inlet of the catalytic conversion device is heated to the second preset temperature by the heating device and the efficiency value of the catalytic conversion device is larger than the third threshold value, determining that the catalytic conversion device is in a second working state;
wherein the third threshold is less than the second threshold.
6. The engine control method according to claim 4, characterized by further comprising:
when the heating device heats the inlet of the catalytic conversion device to a second preset temperature and the efficiency value of the catalytic conversion device is smaller than or equal to a third threshold value, controlling the injection device to stop injecting urea, controlling the heating device to heat the inlet of the catalytic conversion device to a third preset temperature, and controlling the injection device to inject urea after a third preset time from the beginning of heating of the heating device;
wherein the third preset temperature is greater than the second preset temperature;
the third preset time is less than the second preset time.
7. The engine control method according to claim 6, characterized by further comprising:
and when the inlet of the catalytic conversion device is heated to the third preset temperature by the heating device and the efficiency value of the catalytic conversion device is greater than the third threshold value, determining that the catalytic conversion device is in a third working state.
8. The engine control method according to any one of claims 1 to 7, characterized in that the obtaining of the efficiency value of the catalytic conversion device specifically includes:
an increase in an efficiency value of the catalytic conversion device is determined based on an increase in a value of a counting device of the engine.
9. An engine control apparatus comprising a memory storing a computer program, and a processor executing the computer program to perform the engine control method according to any one of claims 1 to 8.
10. A vehicle characterized by comprising the engine control apparatus according to claim 9.
CN202111117199.2A 2021-09-23 2021-09-23 Engine control method, engine control device and vehicle Active CN113756918B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202111117199.2A CN113756918B (en) 2021-09-23 2021-09-23 Engine control method, engine control device and vehicle
PCT/CN2022/098026 WO2023045413A1 (en) 2021-09-23 2022-06-10 Engine control method, engine control apparatus, and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111117199.2A CN113756918B (en) 2021-09-23 2021-09-23 Engine control method, engine control device and vehicle

Publications (2)

Publication Number Publication Date
CN113756918A CN113756918A (en) 2021-12-07
CN113756918B true CN113756918B (en) 2022-10-04

Family

ID=78797115

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111117199.2A Active CN113756918B (en) 2021-09-23 2021-09-23 Engine control method, engine control device and vehicle

Country Status (2)

Country Link
CN (1) CN113756918B (en)
WO (1) WO2023045413A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113756918B (en) * 2021-09-23 2022-10-04 湖南道依茨动力有限公司 Engine control method, engine control device and vehicle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6209313B1 (en) * 1997-11-07 2001-04-03 Siemens Aktiengesellschaft Method of reducing the Nox content in the exhaust gas of a diesel internal combustion engine
CN106014563A (en) * 2016-07-19 2016-10-12 天津星洁汽车排放控制系统有限公司 Diesel engine tail gas after-treatment system and heating control method
WO2020210068A1 (en) * 2019-04-09 2020-10-15 Cummins Emission Solutions Inc. Systems and methods for desulfation of catalysts included in aftertreatment systems
CN112412643A (en) * 2020-11-03 2021-02-26 同济大学 Diesel engine tail gas purification control method based on target detection
CN113167161A (en) * 2019-11-22 2021-07-23 康明斯排放处理公司 System and method for virtually determining fuel sulfur concentration

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113756918B (en) * 2021-09-23 2022-10-04 湖南道依茨动力有限公司 Engine control method, engine control device and vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6209313B1 (en) * 1997-11-07 2001-04-03 Siemens Aktiengesellschaft Method of reducing the Nox content in the exhaust gas of a diesel internal combustion engine
CN106014563A (en) * 2016-07-19 2016-10-12 天津星洁汽车排放控制系统有限公司 Diesel engine tail gas after-treatment system and heating control method
WO2020210068A1 (en) * 2019-04-09 2020-10-15 Cummins Emission Solutions Inc. Systems and methods for desulfation of catalysts included in aftertreatment systems
CN113167161A (en) * 2019-11-22 2021-07-23 康明斯排放处理公司 System and method for virtually determining fuel sulfur concentration
CN112412643A (en) * 2020-11-03 2021-02-26 同济大学 Diesel engine tail gas purification control method based on target detection

Also Published As

Publication number Publication date
WO2023045413A1 (en) 2023-03-30
CN113756918A (en) 2021-12-07

Similar Documents

Publication Publication Date Title
EP1986067B1 (en) Electronic control system for controlling plant temperature
US11454161B2 (en) Thermostat fault diagnosis method and device, computer device and storage medium
US7017337B2 (en) Method and device for controlling an exhaust gas aftertreatment system
US6408616B1 (en) Diesel OBD-II system for detection of degradation of catalyst activity
US9144772B2 (en) Method for monitoring an SCR catalyst
US9051867B2 (en) Diagnostics for hydrocarbon injection for filter regeneration
US6973778B2 (en) Regeneration control of diesel particulate filter
JPH11324659A (en) Catalytic temperature control method and device
US6363713B1 (en) On-board diagnostics for detecting the operation of diesel emissions control system
CN103867283B (en) Diesel engine intelligent heat management system
US7146805B2 (en) Regeneration control of diesel particulate filter
CN107542563B (en) Fault detection in an SCR system by means of ammonia fill level
US9021791B2 (en) Method for diagnosing a metering valve and device for carrying out the method
CN113756918B (en) Engine control method, engine control device and vehicle
CN109681335B (en) Engine thermal protection control method and device
CN110552770A (en) Mixer crystallization detection method and system
CN109057927A (en) A kind of calculation method of catalyst converter oxygen storage capacity
CN111103072A (en) Urea tank fault diagnosis method and device, vehicle and storage medium
CN112109586A (en) Control method and device of electric automobile and computer readable storage medium
CN113994523A (en) Battery pack temperature control method and device, battery management system and storage medium
CN113074036A (en) System and method for determining whether a DPF device is near full load for timely initiation of regeneration
KR20180021653A (en) Method and device for sequential control of an exhaust gas control system
CN113864048B (en) High sulfur oil identification processing method, device, vehicle and computer readable storage medium
CN115288832A (en) Diagnosis method and diagnosis system for identifying DOC sulfur poisoning and aging
CN113513421B (en) Vehicle thermal management control method, device, equipment, medium and product

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
GR01 Patent grant
GR01 Patent grant