64 results about "Diesel particulate filter" patented technology

The invention discloses a particulate matter resistance detection system based on high-voltage pulse self-cleaning and a control method, and relates to the technical field of diesel vehicle emission post-processing. A connecting wire harness comprises a high-voltage heat-resistant wire harness and a signal shielding wire which are respectively used for transmitting a high-voltage pulse signal, a resistance detection signal and a temperature acquisition signal; the sensor probe is connected with the controller module; the Baud rate of the CAN communication interface is 500 kbps, the CAN communication interface supports a UDS diagnosis protocol, can be connected into an OBD-II system and is used for transmitting a detection result to a whole vehicle ECU, and the control method comprises the processes of instantaneous high-voltage pulse cleaning, bias voltage adsorption, dynamic resistance monitoring, temperature compensation and result output. According to the invention, the cleaning time is less than 1 second, the single detection period is less than or equal to 60 seconds, the service life of the sensor is prolonged to more than 5 years, the energy consumption is less than or equal to 1.8 W, the distance between electrodes reaches 10-50 microns, and the temperature detection deviation is + / -0.2 DEG C, so that the requirement on real-time monitoring of a diesel particulate filter (DPF) in national sixth and above emission standards can be met.

The application provides a DPF regeneration control method and device, electronic equipment and storage medium, relates to the engine technical field, and the DPF regeneration control method comprises: acquiring a vehicle working condition; acquiring a particulate matter trap front temperature; acquiring a particulate matter oxidation catalyst front temperature; judging whether the particulate matter trap front temperature and the particulate matter oxidation catalyst front temperature reach a preset temperature condition; if the particulate matter trap front temperature and the particulate matter oxidation catalyst front temperature reach the preset temperature condition, judging whether the vehicle working condition reaches a preset working condition; if the vehicle working condition reaches the preset working condition, controlling the particulate matter trap to carry out specific regeneration. To some extent, the safety of the diesel particulate filter regeneration is improved, the failure rate of the diesel particulate filter burning is reduced, and the service life of the diesel particulate filter is prolonged.

The invention provides a testing device and a testing method for postprocessor temperature field calibration, and belongs to the technical field of internal combustion engine postprocessing, and the method comprises the following steps: installing the testing device, fixing a plurality of thermocouple probes on a base, and enabling the end surfaces of the thermocouple probes to extend to a specified measurement area of a diesel particle filter; triggering and starting a regeneration process of the diesel particulate filter under a target working condition, and synchronously collecting temperature data from the thermocouple probe in real time; calculating the maximum temperature gradient in the diesel particulate filter based on the temperature data; and comparing the maximum temperature gradient with a preset safety threshold, and adjusting a regeneration control strategy according to a comparison result. According to the invention, the test efficiency, the data accuracy and the economical efficiency are obviously improved.

A filter cartridge assembly for an aftertreatment unit includes a diesel particulate filter assembly and a diesel oxidation catalyst assembly. The diesel particulate filter assembly includes a diesel particulate filter housing and a diesel particulate filter substrate assembly. The diesel particulate filter housing includes a first cylindrical body and a first arcuate flange extending from an edge of the first cylindrical body. The diesel oxidation catalyst assembly includes diesel oxidation catalyst housing and diesel oxidation catalyst substrate assembly. The diesel oxidation catalyst housing includes a second cylindrical body and a second arcuate flange extending from an edge of the second cylindrical body. The second arcuate flange is removably coupled to the first arcuate flange to releasably couple the diesel oxidation catalyst housing to the diesel particulate filter housing.

The utility model belongs to the technical field of tail gas emission aftertreatment, and relates to a rapid soot loading device of a diesel particulate filter, which comprises a diesel particulate filter body, one side of the diesel particulate filter body is provided and connected with an exhaust pipe, one end of the exhaust pipe is provided and connected with a fuel heater, and the other end of the exhaust pipe is provided and connected with a diesel engine. A pressure sensor and a particulate matter sensor are connected to the middle of the exhaust pipe, an air inlet is formed in one end of the fuel heater, an oil inlet path is connected to the middle of the fuel heater, and an oil storage tank is connected to one end of the oil inlet path. According to the system, automatic back pressure adjustment can be achieved, so that the soot loading time is shortened, the rapid soot loading effect is achieved, manpower, materials and time cost are greatly saved, sufficient soot loads can be provided for a regeneration test of a diesel particulate filter body through rapid soot loading, and the system is suitable for large-scale popularization and application. Therefore, research and optimization of the regeneration process are accelerated.

This application relates to the field of regeneration control technology, and provides a regeneration control method, device, and system for a vehicle's DPF (Diesel Particulate Filter), comprising: acquiring the downstream measured temperature of the DPF and engine operating parameter information of the vehicle; estimating the upstream input temperature of the DPF based on the engine operating parameter information and the downstream measured temperature to obtain the upstream estimated temperature of the DPF; calculating the engine's feedforward injection quantity and closed-loop injection quantity based on the upstream estimated temperature, the downstream measured temperature, the downstream set temperature of the DPF, and the engine operating parameter information; summing the engine's feedforward injection quantity and closed-loop injection quantity to obtain the engine's target injection quantity; and controlling the amount of regenerated oil injected by the engine to be the target injection quantity. This invention can solve the technical problem in the prior art where insufficient precision in regeneration temperature control leads to abnormal injection quantity, affecting the DPF regeneration effect.

An exhaust system that includes a catalytic converter, selective catalytic reduction system, a muffler and, for certain applications, a diesel particulate filter that each include at least one filter that has an electric heating element, a metallic coating and a plurality of metal rods extending therethrough. The combination of elements are configured to heat the internal housings of the exhaust system and disrupt the direction of flow of exhaust gases which contain harmful toxic gases and pollutants and aid in removing and / or reducing said toxic gases and pollutants.

An exhaust system that includes a catalytic converter, selective catalytic reduction system, a muffler and, for certain applications, a diesel particulate filter that each include at least one filter that has an electric heating element, a metallic coating and a plurality of metal rods extending therethrough. The combination of elements are configured to heat the internal housings of the exhaust system and disrupt the direction of flow of exhaust gases which contain harmful toxic gases and pollutants and aid in removing and / or reducing said toxic gases and pollutants.

The invention discloses a DPF (diesel particulate filter) blockage fault diagnosis enabling optimization method, relates to a DPF, and solves the technical problem that an existing DPF blockage fault diagnosis mechanism cannot meet the requirements of laws and regulations due to the fact that diagnosis is carried out in a reverse dragging mode. The method comprises the steps of setting a DPF blockage fault diagnosis enabling condition under a reverse towing working condition, obtaining engine parameters, judging whether the DPF blockage fault diagnosis enabling condition under the reverse towing working condition is met or not according to the engine parameters, and when the DPF blockage fault diagnosis enabling condition under the reverse towing working condition is met, performing DPF blockage fault diagnosis on the reverse towing working condition. And if yes, judging that the working condition of the engine is a reverse towing condition and not carrying out DPF blockage fault diagnosis. According to the method, the WHTC cycle period fault is not recovered after being reported, so that the requirements of laws and regulations are met.

The invention discloses a diesel engine system for a non-road mobile machine and a DPF regeneration control method. The system includes an engine body, an aftertreatment system, and an electronic control unit. The engine body comprises a crank connecting rod mechanism, a fuel oil system and a turbocharging system. The aftertreatment system comprises a diesel oxidation catalyst and a diesel particulate filter, and is provided with a DPF differential pressure sensor and an exhaust temperature sensor. The system is characterized by further comprising a variable compression ratio executing mechanism integrated in the crank connecting rod mechanism. The ECU is configured to control the variable compression ratio executing mechanism to reduce the compression ratio of the engine and cooperatively adjust the oil injection timing when it is judged that DPF active regeneration needs to be started, so that the exhaust temperature is increased to the range needed by DPF regeneration, dependence of a traditional regeneration strategy on post-injection fuel oil is greatly reduced, and fuel oil consumption in the regeneration process is remarkably reduced. The industrial problem that the fuel economy is worsened in the DPF regeneration period is fundamentally solved.

The invention discloses a regeneration limit value determination method and device based on DPF ash content correction, and the method comprises the steps: obtaining the fuel consumption of a vehicle, and determining a first ash content cumulant in a diesel particulate filter according to the fuel consumption; and according to the first ash content cumulant, based on a first curve between the ash content cumulant and the carbon load correction value, determining a corresponding first carbon load correction value. Wherein the first curve is obtained by correcting the corresponding relation between the ash content cumulant and the carbon load correction value according to the amount value of the ash content after deep cleaning and regeneration of the diesel particle catcher. According to the first carbon load correction value, on the basis of a corresponding relation between the carbon load correction value and a regeneration-triggered carbon load limiting value increasing value, a first increasing value of a regeneration-triggered carbon load limiting value corresponding to the first carbon load correction value is determined, and the modified regeneration-triggered carbon load limiting value of the diesel particle catcher is obtained according to the first increasing value; the regeneration limit value of the DPF is accurately determined.

The invention discloses a control method for a regeneration function of a DPF (diesel particulate filter) of a non-road diesel engine, and relates to the technical field of tail gas treatment of diesel engines. Passive regeneration promotes control, rear spraying is started under proper conditions, and the temperature is accurately controlled; engine operation modes are intelligently switched, and a thermal management mode or a low-carbon-smoke mode is dynamically selected according to working conditions; active regeneration triggering and driving control are achieved, torque is not reduced after triggering, and efficient regeneration is achieved through closed-loop temperature control without affecting power; parking regeneration and safety fault tolerance are achieved, manual starting of a user is supported, and safety is guaranteed through staged temperature control. According to the method, the DPF regeneration control reliability is remarkably improved through multi-path carbon load estimation, passive regeneration is efficiently promoted, meanwhile, it is ensured that power is not affected in the active regeneration process, a user can still safely and autonomously complete regeneration under the high-level carbon load, and emission control, operation efficiency and user experience are effectively considered.

The application discloses a device for detecting the number of particulate matters, which comprises a collecting device arranged on a roadbed and used for collecting exhaust gas of diesel vehicles, the collecting device is used for collecting the exhaust gas of the passing diesel vehicles; a diesel particulate filter arranged in the roadbed and used for filtering the exhaust gas; a license plate collector arranged on a portal frame, the collector is used for collecting the license plate of the passing vehicles; a controller arranged on one side of the portal frame, the controller is internally provided with an electric control system; the controller is electrically connected with the license plate collector and the collecting device, the controller controls the starting of the collecting device according to the type of the passing vehicles by judging the license plate of the vehicles; the license plate collector faces the direction of the vehicle travel, and the collecting device is located on the side of the license plate collector away from the direction of the vehicle travel. The device has the effects of collecting the exhaust gas for analysis and reducing the influence of external factors.

The application discloses a kind of diesel engine DPF ash removal control method and device, wherein the method comprises: according to the current operating state of engine, obtain DPF pressure difference;According to the current operating state of engine, obtain the pressure difference generated by ash and carbon particles;According to the current operating state of engine, obtain the pressure difference generated by ash;According to the pressure difference generated by ash, the first amount of ash deposition is calculated;Whether the first amount of ash deposition reaches ash removal threshold is judged;If the ash removal threshold is reached, active regeneration is triggered.

A fire fighting vehicle includes a chassis, an engine configured to produce exhaust gas, and an exhaust aftertreatment system including a first housing including a first housing inlet fluidly coupled with the engine and configured to receive the exhaust gas, a diesel oxidation catalyst (DOC) disposed within the first housing, the DOC positioned to receive the exhaust gas from the first housing inlet, a diesel particulate filter (DPF) disposed within the first housing, the DPF positioned to receive the exhaust gas from the DOC, a second housing including a second housing inlet configured to receive the exhaust gas from the first housing, a selective catalytic reduction catalyst (SCR) disposed within the second housing, the SCR positioned to receive the exhaust gas from the second housing inlet, and a thermal management system including a heater coupled with at least one of the first housing or the second housing.

Method for ventilating an interior (1-1) of a vehicle (1), comprising the steps: Determine, by means of a control (10), a formation of a negative interior pressure in the interior (1-1) while a journey of the vehicle (1) is maintained, as an interior air mode; Determine (S50), by means of the control (10), an overproduction of a harmful gas in an exhaust gas using a fuel-air ratio or an acceleration position value (APS), determining a pressure quantity of an accelerator pedal, in an air conditioning system (7); Consider (S52, S53) the fulfillment of the formation of negative indoor pressure and the fulfillment of the overproduction of the harmful gas as a triggering condition, and mix outside air into the indoor space (1-1) in order to reduce the negative indoor pressure in the indoor air mode; and after mixing the outside air, taking into account (S60) the non-fulfillment of the overproduction of the harmful gas as a cancellation condition and blocking the outside air; Before the step of determining the formation of negative cabin pressure and determining the overproduction of the harmful gas in the exhaust gas, a throttle position value (DPS) and a vehicle speed are checked together with a fuel-air ratio, the acceleration position value (APS), a catalyst temperature, a coolant temperature, and a lean NO x -LNT front end temperature, diesel particulate filter (DPF) regeneration, exhaust gas recirculation (EGR) load and selective catalytic reducer (SCR) front end temperature using exhaust emission data; and determine (S40) whether an operating status of the air conditioning system (7) is in the indoor air mode.

The invention provides a modified Mn2O3 / DPF monolithic catalyst with different potassium contents and a preparation method thereof.The preparation method comprises the steps that in an aqueous solution of manganese acetate, urea and potassium nitrate, Mn2O3 is constructed in situ on a diesel particulate filter (DPF) through a hydrothermal method, the monolithic catalyst is obtained and recorded as K / Mn / DPF, the molar ratio of potassium nitrate to manganese acetate is regulated, and the modified Mn2O3 / DPF monolithic catalyst with different potassium contents is obtained. A series of different catalysts can be obtained; according to the invention, manganese acetate, urea and potassium nitrate are used for in-situ construction of the Mn2O3 catalyst on DPF by using a hydrothermal method, and the performance of the monolithic catalyst is regulated by regulating the content of potassium nitrate; the preparation method provided by the invention has the advantages of simple process, high controllability, high practicability, no need of special equipment and harsh conditions and the like.

The present application provides a diagnostic method for a diesel particulate filter, comprising the steps of: within a predetermined diagnostic period, receiving a plurality of data points, each data point consisting of a pressure difference between an inlet and an outlet of the diesel particulate filter at the same time and a volume flow rate of exhaust gas passing through the diesel particulate filter; the multiple data points are compared with a threshold value state curve, the threshold value state curve comprises multiple threshold value points representing that the filtering efficiency of the diesel particle filter meets a set engineering index, and each threshold value point comprises the corresponding threshold value pressure difference and threshold value tail gas volume flow; based on a comparison of the plurality of data points to the threshold state curve, an alert is issued indicating a failure of the diesel particulate filter. The application also provides a diagnostic system and a computer program product for a diesel particulate filter. According to the application, a more reliable diagnosis result with better robustness can be provided, the storage space is saved, and the calculation demand is reduced.

The invention provides an ash removal method and device for a diesel particulate filter and a vehicle, and relates to the technical field of diesel aftertreatment. The method comprises the steps that the current accumulated fuel consumption and the current accumulated engine oil consumption of a diesel engine are obtained; based on the accumulated fuel consumption amount and the accumulated engine oil consumption amount, the first ash content of fuel oil injected into the diesel engine and the second ash content of engine oil are combined, and the total ash content generated during operation of the diesel engine is estimated; determining a current ash content storage amount in a diesel particulate filter based on the ash content generation amount and the filtering efficiency of the diesel particulate filter located in the diesel after-treatment system; and when the total ash content storage amount exceeds a preset ash content threshold value and the diesel engine is in a preset safe operation state at present, first-stage ash removal operation is triggered. According to the method, the ash removal opportunity is identified based on the real-time accumulated fuel oil consumption and the accumulated engine oil consumption, a differential pressure sensor is not needed, and the accuracy and timeliness of first-stage ash removal operation are ensured.

The invention discloses a diesel particulate filter blockage early warning method and electronic equipment. According to the method, first pressure data of differential pressure sensors arranged at the front end and the rear end of a diesel particulate filter between a first moment and a second moment, first operation data of a vehicle and first environment data are obtained and preprocessed to obtain second pressure data, second operation data and second environment data; the second pressure data, the second operation data and the second environment data are input into a first blockage prediction model and a second blockage prediction model respectively to obtain a first blockage probability and a second blockage probability of the diesel particulate filter, and then a weighted voting mode is adopted for processing to obtain a target blockage probability of the diesel particulate filter. Therefore, the problems of sensor data distortion, data asynchronization and early warning lag can be effectively solved, the accuracy and the real-time performance of DPF blockage early warning are improved, and the false alarm rate is reduced.

The application provides a self-adaptive diesel engine particle trap regeneration method, device and vehicle, the method comprises the following steps: obtaining the working condition of the diesel engine, obtaining the control parameter of the diesel engine according to the corresponding pulse spectrum of the related parameters of the diesel engine under the corresponding working condition; collecting the temperature of the diesel engine particle trap, operating the diesel engine particle trap with a first preset value, comparing the temperature of the diesel engine particle trap with the regeneration temperature threshold value; if the temperature is less than the threshold value, obtaining the first interpolation or the second interpolation according to the mapping relationship, controlling according to the first interpolation or the second interpolation until the temperature of the diesel engine particle trap is within the preset regeneration temperature threshold value; if the temperature is greater than the upper limit value of the threshold value, the control parameter starts to decrease. The application firstly judges the working condition, obtains the corresponding control parameter and the corresponding control standard according to the working condition, and adjusts the parameter of the diesel engine particle trap in real time during the regeneration process, so that the temperature is prevented from being too low or too high. Different working conditions set different pulse spectrum MAP standard logic, and the influence of road condition change on regeneration is reduced.

This invention provides a leak diagnosis method, device, vehicle, and medium for a DPF regeneration injection system, belonging to the field of exhaust gas aftertreatment technology. The DPF regeneration injection system is used to inject fuel into an exhaust gas aftertreatment system, which includes an oxidizing catalyst and a diesel particulate filter connected in sequence. The method includes: obtaining the first inlet temperature of the oxidizing catalyst and the second inlet temperature of the diesel particulate filter; determining whether the temperature difference between the first and second inlet temperatures is greater than a temperature difference threshold; if so, performing leak diagnosis on the DPF regeneration injection system. This invention reduces the number of leak diagnoses, avoids fuel waste and fuel adhesion accumulation in the exhaust gas aftertreatment system, and ensures the safety of the exhaust gas aftertreatment system.

The invention relates to an improved system and accompanying method for maintenance of diesel particulate filters, using a combination of thermal regeneration and pneumatic / pressurized air stream cleaning.

A method of aftertreatment regeneration includes routing exhaust gas from a diesel engine through an exhaust system, and initiating nitrogen dioxide based aftertreatment regeneration of a diesel particulate filter (DPF) by at least partially deactivating a first DEF injector and an upstream selective catalytic reducer (SCR); increasing the level of nitric oxide within the exhaust gas from the engine; establishing and maintaining a target exhaust gas temperature at an intake port of the DPF by actively controlling combustion characteristics of the engine; a diesel oxidation catalyst (DOC) is used for converting NO in the waste gas entering the DOC into NO2; and converting the solid carbon-based particulate matter accumulated within the DPF into gaseous carbon dioxide (CO2) and NO by using NO2 as an oxidizing agent.

The present application relates to a kind of diesel engine particle filter device with anti-blocking monitoring function, including shell, shell side wall is provided with pressure sensor, end is provided with oil inlet and oil outlet, also include filter core assembly and spare filter mechanism, spare filter mechanism is used to enable when filter piece flow drops, supplement oil flow.This filter device is provided with spare filter piece in central cylinder, so that bypass valve opens spare filter piece is put into use, carries out auxiliary filtration, the auxiliary filtration makes the oil of emergency supplement flow can also carry out particle filtering, spare filter piece is put into use with bypass valve opening, this setting makes spare filter piece when not using, vertical setting is in lower cylinder body, spare filter piece two sides do not have pressure difference, during spare, it will not be repeatedly low pressure high pressure oil impact, only when put into use, it is transversely placed in lower cylinder body, and hidden in central cylinder, will not cause the increase of overall device volume.

The utility model provides a novel DPF gas taking steel pipe mounting base which comprises a DPF catalyst, and the bottom end of the DPF catalyst is symmetrically and fixedly connected with a base. The interior of the base is in threaded connection with the fixed screw rod; the interior of the fixing screw is rotationally connected with the connecting steel pipe, and one end of the high-pressure gas taking steel pipe and one end of the low-pressure gas taking steel pipe are both fixedly connected with the connecting steel pipe. The funnel-shaped end of the connecting steel pipe abuts against the interior of the base, a rubber pad is clamped in the base, and the rubber pad abuts against the inner side wall of the connecting steel pipe. The novel DPF gas taking steel pipe installation base has the advantages that installation is convenient, and water vapor in a gas taking pipe can be rapidly discharged.

The invention discloses a soot and ash load detection method and device and a vehicle. The invention relates to a soot and ash content load detection method which comprises the following steps: in response to a detection instruction, acquiring a pressure difference signal at two ends of a DPF (diesel particulate filter) under a fuel cut-off working condition of an engine, and extracting a first characteristic quantity for representing a pressure oscillation attenuation characteristic based on the acquired pressure difference signal; determining ash content load data in the DPF according to the first characteristic quantity; the average pressure difference data of the two ends of the DPF under the steady-state operation condition of the engine is obtained; and according to the ash content load data and the average pressure difference data, soot load data in the DPF are calculated. The ash content load data is independently calculated by using the first characteristic quantity which is extracted under the fuel cut-off working condition and is used for representing the pressure oscillation attenuation characteristic, and the soot load data is solved by combining the steady-state pressure difference data at the two ends of the DPF, so that the detection precision of the two substances is fundamentally improved; meanwhile, the method can distinguish and quantify the mass of soot and ash content in real time during normal operation of the vehicle, and provides an accurate basis for intelligent control.

The application provides a method and device for determining oil dilution, a storage medium and an electronic device. The method comprises the following steps: determining that a diesel particulate filter enters an active regeneration process, the active regeneration process being a process of removing particles deposited in a filter of the diesel particulate filter by injecting diesel into a cylinder through post-injection; obtaining a first diesel injection amount and a second diesel injection amount, the first diesel injection amount being a total amount of diesel injected into the cylinder through post-injection, and the second diesel injection amount being an amount of diesel entering a diesel oxidation catalyst for reaction; determining a third diesel injection amount according to a difference between the first diesel injection amount and the second diesel injection amount, the third diesel injection amount being an amount of diesel injected onto an inner wall of the cylinder through post-injection. The method can accurately identify the oil dilution condition based on the calculation of the amount of diesel injected onto the inner wall of the cylinder through post-injection in the DPF active regeneration process chemical reaction.

An information display system for a work vehicle includes a meter panel unit including a display and a controller configured or programmed to control the meter panel unit. When a user operates a Diesel Particulate Filter (DPF) regeneration switch that receives an instruction to execute DPF regeneration of the work vehicle, if the work vehicle does not satisfy conditions necessary for execution of the DPF regeneration, the controller is configured or programmed to cause the display to display information relating to operations to be performed by the user for the work vehicle to satisfy the conditions.

To provide an exhaust emission control device capable of promoting atomization and evaporation of urea water in exhaust gas until the exhaust gas mixed with the urea water reaches a catalyst for urea selective catalytic reduction from an exhaust connecting pipe, and suppressing or preventing corrosion of the exhaust connecting pipe.SOLUTION: The exhaust emission control device has a diesel particulate filter 1, a urea selective catalyst reduction 2, and an exhaust connecting pipe 3 for connecting the diesel particulate filter 1 and the urea selective catalyst reduction 2, and the exhaust connecting pipe 3 has a linear part (corresponding to an intermediate part 31) extending in a direction parallel to the longitudinal direction of the exhaust emission control device.SELECTED DRAWING: Figure 1