CN112324541B - Regeneration system and control method for particle trap of biofuel diesel engine - Google Patents
Regeneration system and control method for particle trap of biofuel diesel engine Download PDFInfo
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- CN112324541B CN112324541B CN202011122474.5A CN202011122474A CN112324541B CN 112324541 B CN112324541 B CN 112324541B CN 202011122474 A CN202011122474 A CN 202011122474A CN 112324541 B CN112324541 B CN 112324541B
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- 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
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The invention relates to a regeneration system and a control method for a biofuel diesel engine particle catcher, wherein the system comprises a controller, and a first temperature sensor, a second temperature sensor, a pressure difference sensor, a liquid injection device and a polluted liquid collecting device which are respectively connected with the controller, wherein the first temperature sensor is arranged in an inlet pipeline of the diesel engine particle catcher, the second temperature sensor is arranged in an outlet pipeline of the diesel engine particle catcher, the pressure difference sensor is used for acquiring the pressure difference between the inlet pipeline and the outlet pipeline of the diesel engine particle catcher, the liquid injection device is used for injecting liquid into the diesel engine particle catcher, the inlet pipeline or the outlet pipeline is connected with the polluted liquid collecting device, and the controller is connected with an electronic control unit of a locomotive and the diesel engine particle catcher. Compared with the prior art, the diesel engine particle catcher can be prevented from being blocked, and the service life of the diesel engine particle catcher is prolonged.
Description
Technical Field
The invention relates to the field of diesel engine particle traps, in particular to a regeneration system and a control method of a biofuel diesel engine particle trap.
Background
Diesel engines (diesel engines) are widely used in the fields of transportation, agricultural machinery, engineering machinery, and the like due to their excellent power performance and economy. However, the diesel engine generates more particulate emissions, causes greater pollution to the atmospheric environment, and also poses greater threats to the health of residents.
A diesel particulate trap (DPF) is capable of trapping particulate matter, preventing the particulate matter from being discharged to the atmosphere. The DPF can accumulate particulate matters continuously in the using process, so that the exhaust back pressure is increased, and the normal work of the diesel engine is influenced. Therefore, the temperature of the particulate matter trapped in the DPF is generally raised by adding a catalyst and raising the temperature by injecting oil, so that combustible substances such as soot and organic matter in the particulate matter are oxidized to form gas and discharged to the atmosphere.
In the diesel engine using the biodiesel as fuel, the inorganic salt content in the particulate matters is high, and the particulate matters cannot be removed in the DPF in an oxidation combustion mode, so that the DPF can be blocked over time, and even sintering and other phenomena are generated in the regeneration process, so that irreversible damage is caused to the DPF.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned drawbacks of the prior art and providing a system and a method for regenerating a particle trap of a biofuel diesel engine.
The purpose of the invention can be realized by the following technical scheme:
a biofuel diesel engine particle trap regeneration system comprises a controller, and a first temperature sensor, a second temperature sensor, a pressure difference sensor, a liquid injection device and a polluted liquid collecting device which are respectively connected with the controller, wherein the first temperature sensor is arranged in an inlet pipeline of the diesel engine particle trap, the second temperature sensor is arranged in an outlet pipeline of the diesel engine particle trap, the pressure difference sensor is used for acquiring the pressure difference between the inlet pipeline and the outlet pipeline of the diesel engine particle trap, the liquid injection device is used for injecting liquid into the diesel engine particle trap, the inlet pipeline or the outlet pipeline is connected with the polluted liquid collecting device, and the controller is connected with an electronic control unit of a locomotive and the diesel engine particle trap.
The liquid injection device comprises a liquid tank and a nozzle which are connected with each other, the nozzle is arranged in an inlet pipeline or an outlet pipeline, and the nozzle and the polluted liquid collecting device are positioned on the opposite side of the diesel engine particle catcher.
An electronic valve is arranged between the polluted liquid collecting device and the inlet pipeline or the outlet pipeline, and the electronic valve is connected with a controller.
A method of controlling the biofuel diesel engine particulate trap regeneration system, the method comprising the steps of:
step S1: the controller monitors the regeneration process of the diesel engine particle catcher;
step S2: the controller judges whether the diesel engine particle catcher reaches the spraying liquid ash removal condition, if so, the controller controls the liquid spraying device to spray liquid to the diesel engine particle catcher, and if not, the step S2 is executed.
Spray liquid ash removal conditions include:
the diesel engine particulate trap is fully regenerated;
the accumulated time of the complete regeneration process of the diesel engine particulate filter is larger than a first threshold value;
the pressure difference between the inlet conduit and the outlet conduit of the diesel engine particulate trap is greater than a second threshold value.
The method for judging the complete regeneration of the diesel engine particulate filter by the controller comprises the following steps:
the controller collects a first temperature value and a second temperature value of the first temperature sensor and the second temperature sensor, the first temperature value and the second temperature value are compared with the complete regeneration temperature, if the first temperature value and the second temperature value are higher than the complete regeneration temperature, the controller judges that the diesel engine particle trap is in the complete regeneration process, and after a plurality of complete regeneration processes are finished, the controller judges that the diesel engine particle trap is completely regenerated.
After the diesel engine particulate trap reaches the spray liquid ash removal condition in step S2, the following specific steps are performed:
the method comprises the steps that a controller obtains engine rotating speed information and load information of an electronic control unit of the locomotive;
the controller calculates the temperature of the diesel engine particle catcher carrier based on the engine speed information and the load information, and controls the liquid injection device to inject liquid into the diesel engine particle catcher when the temperature of the diesel engine particle catcher carrier is lower than a liquid injection safety temperature threshold value.
Diesel engine particulate trap carrier temperature TdpfThe calculation formula of (2) is as follows:
wherein A is a correction coefficient; vdpfIs the volume of the diesel engine particulate trap,
the exhaust flow rate is obtained by looking up a table according to the engine speed information and the load information; cexhaustgasThe heat capacity of the tail gas is regarded as a constant value; zetamental-airThe heat exchange coefficient between the wall surface of the diesel engine particle catcher and the air is a constant value; t is1Is the temperature value, T, of the first temperature sensor2Is the temperature value of the second temperature sensor.
Compared with the prior art, the invention has the following advantages:
(1) the device is provided with a controller, a liquid injection device, a polluted liquid collecting device and the like, and inorganic salt can be removed in the process of removing the ash content of the injected liquid after the diesel engine particle catcher is regenerated, so that the diesel engine particle catcher is prevented from being blocked, and the service life of the diesel engine particle catcher is prolonged.
(2) An electronic valve is arranged between the polluted liquid collecting device and the inlet pipeline or the outlet pipeline, and the electronic valve is connected with a controller and can control the polluted liquid collecting device to be opened or closed through the electronic valve.
(3) Before the liquid injection device injects the liquid to the diesel engine particle catcher, the condition whether the diesel engine particle catcher is completely regenerated is judged, and the working efficiency and the comprehensiveness of a regeneration system can be improved.
(4) Before the liquid injection device injects the liquid to the diesel engine particle catcher, the conditions of whether the temperature value is lower than the spraying liquid safe temperature threshold value and the like are judged, so that the regeneration system works in a safe environment.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a schematic structural diagram of example 2 of the present invention;
FIG. 3 is a flow chart of the present invention for determining whether a diesel particulate trap is fully regenerated;
FIG. 4 is a flow chart of the present invention after achieving spray liquid ash removal conditions.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
Example 1
The embodiment provides a biofuel diesel engine particle trap regeneration system, which comprises a controller, a first temperature sensor, a second temperature sensor, a pressure difference sensor, a liquid injection device and a polluted liquid collecting device, wherein the first temperature sensor, the second temperature sensor, the pressure difference sensor, the liquid injection device and the polluted liquid collecting device are respectively connected with the controller; the liquid injection device comprises a liquid tank and a nozzle which are connected with each other, the nozzle is arranged in the inlet pipeline or the outlet pipeline, and the nozzle and the polluted liquid collecting device are positioned on the opposite side of the diesel engine particle catcher; an electronic valve is arranged between the polluted liquid collecting device and the inlet pipeline or the outlet pipeline, and the electronic valve is connected with a controller.
After the diesel engine particulate trap works for a certain time, a certain amount of ash (generally salts generated by K, Na and the like, and the salts are generally soluble in water) is accumulated, and the ash needs to be removed through the control of a biofuel diesel engine particulate trap regeneration system.
The embodiment also provides a control method of the regeneration system of the particle catcher of the biofuel diesel engine, which comprises the following steps:
step S1: the controller monitors the regeneration process of the diesel engine particle catcher;
step S2: the controller judges whether the diesel engine particle catcher reaches the spraying liquid ash removal condition, if so, the controller controls the liquid spraying device to spray liquid to the diesel engine particle catcher, and if not, the step S2 is executed.
Spray liquid ash removal conditions include: the diesel engine particulate trap is fully regenerated; the accumulated time of the complete regeneration process of the diesel engine particulate filter is larger than a first threshold value; the pressure difference between the inlet conduit and the outlet conduit of the diesel engine particulate trap is greater than a second threshold value.
The method for judging the complete regeneration of the diesel engine particulate filter by the controller comprises the following steps: the controller collects a first temperature value and a second temperature value of the first temperature sensor and the second temperature sensor, the first temperature value and the second temperature value are compared with the complete regeneration temperature, if the first temperature value and the second temperature value are higher than the complete regeneration temperature, the controller judges that the diesel engine particle trap is in the complete regeneration process, and after a plurality of complete regeneration processes are finished, the controller judges that the diesel engine particle trap is completely regenerated.
After the diesel engine particulate trap reaches the spray liquid ash removal condition in step S2, the following specific steps are performed: the method comprises the steps that a controller obtains engine rotating speed information and load information of an electronic control unit of the locomotive; the controller calculates the carrier temperature of the diesel engine particle catcher based on the engine rotating speed information and the load information, when the carrier temperature of the diesel engine particle catcher is lower than a spray liquid safety temperature threshold value, the controller controls the liquid spraying device to spray liquid to the diesel engine particle catcher, the liquid dissolves ash to form polluted liquid, and meanwhile, the controller controls the electronic valve to be opened to enable the polluted liquid to enter the polluted liquid collecting device.
Diesel engine particulate trap carrier temperature TdpfThe calculation formula of (2) is as follows:
wherein A is a correction coefficient, is related to the internal surface area of the diesel engine particle catcher and is related to the specification of the diesel engine particle catcher; vdpfIs the volume of the diesel engine particulate trap,
the exhaust flow rate is obtained by looking up a table according to the engine speed information and the load information; cexhaustgasIs the heat capacity of the exhaust gas, which is considered constant over the range of variation of the temperature and composition of the diesel engine particulate trap; zetamental-airThe heat exchange coefficient between the wall surface of the diesel engine particle catcher and the air is a constant value; t is1Is the temperature value, T, of the first temperature sensor2Is the temperature value of the second temperature sensor.
In this embodiment, the liquid is water, the contaminated liquid collection device is a contaminated liquid collection tank, the nozzle is disposed in an inlet passage of the diesel engine particulate trap, and the contaminated liquid collection device is communicated with an outlet passage of the diesel engine particulate trap.
Example 2
In this embodiment, the nozzle is disposed in an outlet passage of the diesel engine particulate trap, and the contaminated liquid collecting device is communicated with an inlet passage of the diesel engine particulate trap. The rest is the same as in example 1.
Claims (3)
1. A control method of a biofuel diesel engine particle catcher regeneration system is characterized in that the used biofuel diesel engine particle catcher regeneration system comprises the following steps:
the device comprises a controller, a first temperature sensor, a second temperature sensor, a differential pressure sensor, a liquid injection device and a polluted liquid collecting device, wherein the first temperature sensor, the second temperature sensor, the differential pressure sensor, the liquid injection device and the polluted liquid collecting device are respectively connected with the controller;
specifically, the method comprises the following steps:
step S1: the controller monitors the regeneration process of the diesel engine particle catcher;
step S2: the controller judges whether the diesel engine particle catcher reaches the condition for removing the ash content of the injected liquid, if so, the controller controls the liquid injection device to inject the liquid into the diesel engine particle catcher, and if not, the step S2 is executed;
the spray liquid ash removal conditions include: the diesel engine particulate trap is fully regenerated; the accumulated time of the complete regeneration process of the diesel engine particulate filter is larger than a first threshold value; a pressure difference between an inlet conduit and an outlet conduit of the diesel engine particulate trap is greater than a second threshold;
the method for judging the complete regeneration of the diesel engine particulate filter by the controller comprises the following steps:
the controller collects a first temperature value and a second temperature value of the first temperature sensor and the second temperature sensor, compares the first temperature value and the second temperature value with the complete regeneration temperature, judges that the diesel engine particle catcher is in the complete regeneration process if the first temperature value and the second temperature value are both higher than the complete regeneration temperature, and judges that the diesel engine particle catcher is completely regenerated after a plurality of complete regeneration processes are finished;
after the diesel engine particulate trap reaches the spray liquid ash removal condition in step S2, the following specific steps are performed:
the method comprises the steps that a controller obtains engine rotating speed information and load information of an electronic control unit of the locomotive;
the controller calculates the temperature of the diesel engine particle catcher carrier based on the engine rotating speed information and the load information, and controls the liquid injection device to inject liquid into the diesel engine particle catcher when the temperature of the diesel engine particle catcher carrier is lower than a liquid injection safety temperature threshold value;
diesel engine particulate trap carrier temperature TdpfThe calculation formula of (2) is as follows:
wherein A is a correction coefficient; vdpfIs the volume of the diesel engine particulate trap,
the exhaust flow rate is obtained by looking up a table according to the engine speed information and the load information; cexhaustgasThe heat capacity of the tail gas is regarded as a constant value; zetamental-airThe heat exchange coefficient between the wall surface of the diesel engine particle catcher and the air is a constant value; t is1Is the temperature value, T, of the first temperature sensor2Is the temperature value of the second temperature sensor.
2. The method of claim 1, wherein the liquid injection device comprises a liquid tank and a nozzle connected to each other, the nozzle is disposed in the inlet conduit or the outlet conduit, and the nozzle and the contaminated liquid collecting device are disposed on opposite sides of the diesel particulate trap.
3. The method as claimed in claim 1, wherein an electronic valve is disposed between the contaminated liquid collecting means and the inlet conduit or the outlet conduit, and the electronic valve is connected to the controller.
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| CN202011122474.5A CN112324541B (en) | 2020-10-20 | 2020-10-20 | Regeneration system and control method for particle trap of biofuel diesel engine |
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| CN114235271B (en) * | 2021-11-12 | 2024-01-12 | 潍柴动力股份有限公司 | Dew point detection method and device for differential pressure sensor, storage medium and equipment |
| CN114183226B (en) * | 2021-12-21 | 2023-03-21 | 潍柴动力股份有限公司 | Efficiency monitoring method and device for particle catcher, electronic equipment and storage medium |
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| CN107420159A (en) * | 2017-05-19 | 2017-12-01 | 昆明理工大学 | A kind of grain catcher regenerating unit and its control method |
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| ES2408243B1 (en) * | 2013-02-11 | 2014-04-15 | Universidad Politécnia De Valencia | PARTICLE FILTER SYSTEM FOR ENGINE AND PRESSURE LOSS REDUCTION METHOD OF SUCH FILTER |
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| JPS61164018A (en) * | 1985-01-14 | 1986-07-24 | Mazda Motor Corp | Exhaust gas purifying device of engine |
| WO2017138858A1 (en) * | 2016-02-11 | 2017-08-17 | Scania Cv Ab | Use of a lubrication oil that forms water-soluble ash when combusted, engine system in which the oil is used and a vehicle comprising the engine system |
| CN107420159A (en) * | 2017-05-19 | 2017-12-01 | 昆明理工大学 | A kind of grain catcher regenerating unit and its control method |
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