CN114856756A - Diesel engine oil product and urea quality monitoring system and method - Google Patents
Diesel engine oil product and urea quality monitoring system and method Download PDFInfo
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- CN114856756A CN114856756A CN202210466000.5A CN202210466000A CN114856756A CN 114856756 A CN114856756 A CN 114856756A CN 202210466000 A CN202210466000 A CN 202210466000A CN 114856756 A CN114856756 A CN 114856756A
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 239000004202 carbamide Substances 0.000 title claims abstract description 110
- 238000012544 monitoring process Methods 0.000 title claims abstract description 31
- 239000010710 diesel engine oil Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000010705 motor oil Substances 0.000 claims abstract description 65
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 21
- 239000011593 sulfur Substances 0.000 claims abstract description 21
- 239000000295 fuel oil Substances 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 19
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 12
- 239000002283 diesel fuel Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000013500 data storage Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
-
- 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
- F01N3/2066—Selective catalytic reduction [SCR]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
- F02B77/083—Safety, indicating, or supervising devices relating to maintenance, e.g. diagnostic device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
- F01M2011/14—Indicating devices; Other safety devices for indicating the necessity to change the oil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
- F01M2011/14—Indicating devices; Other safety devices for indicating the necessity to change the oil
- F01M2011/1406—Indicating devices; Other safety devices for indicating the necessity to change the oil by considering acidity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
- F01M2011/14—Indicating devices; Other safety devices for indicating the necessity to change the oil
- F01M2011/146—Indicating devices; Other safety devices for indicating the necessity to change the oil by considering moisture level
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
- F01M2011/14—Indicating devices; Other safety devices for indicating the necessity to change the oil
- F01M2011/1473—Indicating devices; Other safety devices for indicating the necessity to change the oil by considering temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a diesel engine oil and urea quality monitoring system and a method; the system comprises an engine oil temperature sensor arranged at the bottom of an engine oil pan and a dielectric constant sensor arranged beside an engine oil filter element seat; the diesel sulfur-containing sensors are arranged at the inlet end and the outlet end of the DOC; a urea temperature sensing device and a urea quality sensor arranged in the urea box; the sensor is connected with the engine controller in a communication mode, and the engine controller compares the detected value of the sensor with data stored in an internal database of the engine controller, generates information for representing the use state and prompts the information on an instrument panel display. The invention provides a diesel engine oil and urea quality monitoring system and method, which are used for judging whether filled engine oil is qualified, whether components of the engine oil are deteriorated and need to be replaced in operation, whether the sulfur content of fuel oil exceeds the standard, whether the filled urea is qualified and whether the components are deteriorated.
Description
Technical Field
The invention relates to the field of engine monitoring, in particular to a diesel engine oil product and urea quality monitoring system and method.
Background
In recent years, emissions regulations for internal combustion engines have become more stringent, and the required emissions limits for NOx and particulate matter for internal combustion engines have become lower and lower, so that in most cases the emission limits cannot be met by optimizing combustion technology alone. In order for the engine to be more fuel efficient and environmentally friendly, many next generation engines will operate at higher operating temperatures, which requires changing the composition of the engine fuel and oil, adding an exhaust aftertreatment system to enable the engine to withstand more heat, and meeting more stringent emission regulatory limits. Therefore, the oil is upgraded in recent years in China.
However, the quality of oil products and urea on the market at present is not uniform, unqualified fuel oil and engine oil are injected to cause great damage to an engine and post-treatment, sulfur in the engine fuel can generate derivative sulfate caused by the unqualified fuel oil, the derivative sulfate can poison or corrode devices (such as DOC and SCR, especially molecular sieve SCR), an exhaust gas recirculation device (EGR) and a DPF of a tail gas post-treatment system, and the derivative sulfate generated by reaction can cover the surface of a post-treatment catalyst, so that the exposed area of the catalyst is reduced, the catalytic activity is reduced, the post-treatment system cannot normally operate, the power performance is reduced, and the emission exceeds the standard. For engine oil, the common practice at present is to adopt a method of measuring the components of the engine oil by time or mileage and visual inspection to determine the replacement period passively, the subjectivity is too strong, and the maintenance is too early or too late, and the refuge is not required until the whole vehicle has a big problem because whether the filled engine oil meets the requirements or not and sensory cognition is not available.
Therefore, a technology and a method for online detection of diesel engine oil are urgently needed, whether newly-filled fuel oil and engine oil meet requirements can be judged, and the oil state can also be detected in real time in later-stage actual operation, so that large faults of an engine and a post-processing system of the engine caused by unqualified oil can be determined, the phenomenon of withering and tearing of a company service staff and a terminal customer is avoided, the oil can be replaced as required, and the maintenance cost of a whole vehicle is reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a diesel engine oil and urea quality monitoring system and a method, which are used for judging whether the injected engine oil is qualified, whether the components of the injected engine oil are deteriorated and need to be replaced in the running process, whether the sulfur content of fuel oil exceeds the standard, whether the injected urea is qualified and whether the components of a urea solution are deteriorated, and sending prompt information in time.
The invention is realized by the following technical scheme:
a diesel engine oil and urea quality monitoring system comprises an engine lubricating system, an engine post-treatment system, a urea box, an engine controller and an instrument panel display; the engine oil temperature sensor is arranged at the bottom of an engine oil pan, and the dielectric constant sensor is arranged beside the engine oil filter element seat; the diesel sulfur-containing sensors are arranged at the inlet end and the outlet end of the DOC; the urea temperature sensor and the urea quality sensor are arranged in the urea box and are in communication connection with the engine controller; the engine controller compares the detection value of the sensor with the data stored in the internal database thereof to generate information for representing the use state, and prompts on the instrument panel display, and has the advantages that: the method is used for monitoring the quality of fuel oil, engine oil and urea in an engine lubricating system, an engine post-treatment system and a urea tank in real time and the problem that the exhaust emission exceeds standard.
Preferably, the urea quality sensor is arranged at the bottom of the urea box; the beneficial effects are that: the urea quality sensor is used for monitoring the components of urea in the current state in real time, and the urea quality sensor can more accurately monitor the urea quality at the bottom of the urea box due to the solution deposition effect.
Preferably, the urea temperature sensor is arranged at a liquid suction port of the urea box; the beneficial effects are that: the urea quality sensor is used for monitoring the temperature in the urea box in real time and judging the state of urea, and only when the urea is melted and is in a liquid state, the current components of the urea solution are monitored by the urea quality sensor.
Preferably, the communication line is a CAN line; the beneficial effects are that: the bus capable of being connected with a plurality of units simultaneously has the advantages of strong real-time performance, strong anti-electromagnetic interference capability, low cost and the like.
Preferably, the diesel fuel sulfur sensor is an optical sensor; the beneficial effects are that: and detecting the content of the derived sulfate in the tail gas.
A diesel engine oil and urea quality monitoring method adopts any one of the diesel engine oil and urea quality monitoring systems; the engine controller comprises a data storage unit, and the storage unit records the dynamic viscosity and the full acid value limit value, the water content and the iron content limit value of the engine oil at different temperatures; comparing the dynamic viscosity, the full acid value, the water content and the iron content of the engine oil at the current engine oil temperature monitored by the engine oil temperature sensor and the dielectric constant sensor with the limit values of the dynamic viscosity and the full acid value and the limit values of the water content and the iron content on the storage unit, and judging whether the engine oil is qualified; there is also a specific state for detecting whether the newly charged engine oil is a good product.
Preferably, a sulfate mass flow limit value is recorded on the storage unit, and whether the fuel oil is qualified or not is judged by comparing the content of derived sulfate in the tail gas detected by the diesel sulfur sensor with the sulfate mass flow limit value on the storage unit.
Preferably, the storage unit records a urea solution component limit value, the urea temperature sensor monitors the state of the urea solution, and the urea quality sensor monitors the current component of the urea solution only under the condition that the urea solution is in a liquid state and compares the current component with the urea solution component limit value on the storage unit to judge whether the urea solution is qualified or not; there is also a special state for detecting whether the newly added urea solution is a good product.
Compared with the prior art, the invention has the beneficial effects that: 1. the engine oil temperature, the engine oil acidity, the engine oil iron content, the engine oil moisture, the fuel oil sulfur content, the urea solution component and other parameters can be obtained in real time, so that whether the injected engine oil and urea are qualified or not can be judged, and the fault problem caused by wrong addition and wrong addition can be fundamentally prevented; 2. the system can also send out prompt early warning information when exceeding a system preset value based on the detection value of the sensor and the real-time running state of the engine, and timely judge whether the sulfur content of the fuel exceeds the standard, whether the engine oil is seriously degraded, whether the urea solution is deteriorated and the like; 3. the system disclosed by the invention can not only prevent in advance, but also accurately judge the source of the problem and send out early warning information in time, thereby reducing the maintenance cost of terminal customers and ensuring the reliable operation of the engine.
Drawings
FIG. 1 is a schematic view of a diesel engine oil and urea quality monitoring system according to the first embodiment;
FIG. 2 is a flow chart of a method for monitoring the quality of diesel oil and urea according to the second embodiment;
in the figure: 1. a dashboard display; 2. an engine controller; 3. an engine; 4. a post-processing system; 41. an upstream diesel sulfur sensor; 42. a downstream diesel sulfur sensor; 5. a urea tank; 51. a urea quality sensor; 52. a urea temperature sensor; 6. an oil pan; 61. an engine oil temperature sensor; 62. a dielectric constant sensor.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example one
As shown in fig. 1, a diesel engine oil and urea quality monitoring system comprises an engine lubrication system, an engine post-treatment system, a urea tank 5, an engine controller 2 and an instrument panel display 1; an engine oil temperature sensor 61 arranged at the bottom of the engine oil pan 6 and a dielectric constant sensor 62 arranged beside the engine oil filter element are connected with the engine controller 2 through CAN lines; the diesel sulfur-containing sensors 41 and 42 arranged at the inlet end and the outlet end of the DOC are in communication connection with the engine controller 2 through CAN lines; a urea temperature sensor 52 and a urea quality sensor 51 which are arranged inside the urea tank 5 and are in communication connection with the engine controller 2 through a CAN line; the engine oil temperature sensor 61 and the dielectric constant sensor 62 are configured to detect the temperature, acidity, iron content, and moisture of the engine oil, and send the detected values to the engine controller 2; the diesel oil sulfur sensor 41, 42 is a sensor based on an optical sensing technology, and can realize real-time online detection of the content of derived sulfate in the exhaust gas and send the content information of the sulfate to the engine controller 2; the urea temperature sensor 52 and the urea quality sensor 51 monitor the temperature of the urea solution and the solution components in the current state in real time, and send the monitored information to the engine controller 2; the engine controller 2 is provided with a storage unit, and the storage unit records the dynamic viscosity and the full acid value limit of the engine oil, the water content and iron content limit, the sulfate mass flow limit and the urea solution composition limit under the current standard and at different temperatures.
Example two
As shown in fig. 2, a method for monitoring the quality of diesel oil and urea; by adopting the diesel engine oil and urea quality monitoring system, the engine controller 2 is provided with a storage unit, the dynamic viscosity and full acid value limit values of engine oil, the water content and iron content limit values, the sulfate mass flow limit value and the urea solution composition limit value at different temperatures are recorded on the storage unit, and the specific monitoring method comprises the following steps:
before the engine controller 2 is powered on and then started, an engine oil temperature sensor 61 arranged at the bottom of an engine oil pan and a dielectric constant sensor 62 arranged beside an engine oil filter core are compared with the upper limit value of a storage unit according to the dynamic viscosity, the full acid value, the moisture content and the iron content of the engine oil under the monitored current engine oil temperature, and whether the engine oil is qualified or not is judged: if the dynamic viscosity, the full acid value, the moisture and the iron content of the current engine oil are within the limit values, no prompt is given, otherwise, the display is carried out on an instrument panel through a CAN line: the engine oil is unqualified;
after the engine starts, the engine oil temperature sensor 61 and the engine oil dielectric constant sensor 62 compare the dynamic viscosity, the full acid value, the moisture content and the iron content of the engine oil under the current engine oil temperature monitored by the sensors in real time with the corresponding index limit value under the corresponding temperature on the storage unit, and judge whether the engine oil is qualified: if the dynamic viscosity, the full acid value, the moisture and the iron content of the current engine oil are within the limit values, no prompt is given, otherwise, the display is carried out on an instrument panel through a CAN line: severe deterioration of engine oil;
after the engine runs, the diesel oil sulfur sensors 41 and 42 arranged at the DOC inlet and the DOC outlet are used for monitoring the content data of the derived sulfate in the tail gas in real time and sending the data to the engine controller, if the monitored sulfate content data exceed the sulfate mass flow limit value stored in the engine controller, the controller is used for transmitting information to the instrument panel and displaying the data on the instrument panel: the sulfur content of the fuel oil exceeds the standard; if the monitored sulfate content data is lower than the sulfate mass flow limit value stored in the engine controller, the controller is not operated;
after the engine ECU is powered on, if the monitored temperature of the urea temperature sensor 52 is lower than the set value T1, for example, T1 is set to-9 ℃, since the urea solution is in a crystalline state in the current state, the urea quality sensor 51 needs to detect components after the urea temperature rises, and therefore the urea quality sensor 51 does not operate; if the temperature value is higher than the set value T1, the urea quality sensor 51 monitors the composition of the solution in the current urea tank, and if the solution composition limit value is not in the composition range section recorded on the storage unit, the solution composition limit value is displayed on an instrument panel through a CAN line: the urea solution is deteriorated, otherwise, no output is generated;
after the engine is started, the urea temperature sensor 52 and the urea quality sensor 51 monitor the temperature and the components of the urea solution in real time, compare the temperature and the components with the urea solution component limit values on the storage unit, and judge whether the urea solution is qualified: if the urea solution composition limit value is not in the composition range interval recorded on the storage unit, outputting through a CAN line: the urea solution is deteriorated, otherwise no output is produced.
The diesel engine oil and urea quality monitoring method provided by the embodiment can obtain parameters such as engine oil temperature, engine oil acidity, engine oil iron content, engine oil moisture, fuel oil sulfur content and urea solution composition in real time, thereby judging whether the filled engine oil and urea are qualified or not, fundamentally preventing the fault problems caused by error addition and wrong addition, and being based on the detection value of the sensor and the real-time running state of the engine, therefore, when the sulfur content exceeds the preset value of the system, the system sends out prompt and early warning information to judge whether the sulfur content of the fuel exceeds the standard, whether the engine oil is seriously degraded, whether the urea solution is deteriorated and the like in time, and based on the system disclosed by the invention, the system not only can prevent in advance, but also can accurately judge the root cause of the problem, and early warning information is sent out in time, so that the maintenance cost of a terminal customer can be reduced, and the reliable operation of an engine can be ensured.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, 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.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.
Claims (8)
1. A diesel engine oil and urea quality monitoring system which characterized in that: the monitoring system comprises an engine lubricating system, an engine post-treatment system, a urea box, an engine controller and an instrument panel display; the engine oil temperature sensor is arranged at the bottom of an engine oil pan, and the dielectric constant sensor is arranged beside the engine oil filter element seat; the diesel sulfur-containing sensors are arranged at the inlet end and the outlet end of the DOC; a urea temperature sensor and a urea quality sensor arranged in the urea box; the sensors are in communication connection with an engine controller; and the engine controller compares the detection value of the sensor with data stored in an internal database thereof to generate information for representing the use state and prompts the information on an instrument panel display.
2. The diesel engine oil and urea quality monitoring system according to claim 1, characterized in that: the urea quality sensor is arranged at the bottom of the urea box.
3. The diesel engine oil and urea quality monitoring system according to claim 1, characterized in that: the urea temperature sensor is arranged at a liquid suction port of the urea box.
4. The diesel engine oil and urea quality monitoring system according to claim 1, characterized in that: the communication line is a CAN line.
5. The diesel engine oil and urea quality monitoring system according to claim 1, characterized in that: the diesel oil sulfur-containing sensor is an optical sensor.
6. A diesel engine oil and urea quality monitoring method is characterized in that: adopting a diesel oil and urea quality monitoring system of any one of claims 1-5; the engine controller comprises a data storage unit, and the storage unit records the dynamic viscosity and the full acid value limit value, the water content and the iron content limit value of the engine oil at different temperatures; and comparing the dynamic viscosity, the full acid value, the water content and the iron content of the engine oil at the current engine oil temperature monitored by the engine oil temperature sensor and the dielectric constant sensor with the dynamic viscosity and full acid value limit value and the water content and iron content limit value on the storage unit to judge whether the engine oil is qualified.
7. The diesel engine oil and urea quality monitoring method according to claim 6, characterized in that: and a sulfate mass flow limit value is recorded on the storage unit, and whether the fuel oil is qualified or not is judged by comparing the content of derived sulfate in the tail gas detected by the diesel oil sulfur-containing sensor with the sulfate mass flow limit value on the storage unit.
8. The diesel engine oil and urea quality monitoring method according to claim 6, characterized in that: the storage unit is recorded with urea solution component limit values, the state of the urea solution is monitored according to the urea temperature sensor, only under the condition that the urea solution is in a liquid state, the current components of the urea solution are monitored by the urea quality sensor, and the current components are compared with the urea solution component limit values on the storage unit to judge whether the urea solution is qualified.
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