WO2019183864A1

WO2019183864A1 - Selective catalytic reduction information processing system and method

Info

Publication number: WO2019183864A1
Application number: PCT/CN2018/080986
Authority: WO
Inventors: 许玉江; 周洪龙; 穆安帝
Original assignee: 罗伯特·博世有限公司; 许玉江; 周洪龙; 穆安帝
Priority date: 2018-03-29
Filing date: 2018-03-29
Publication date: 2019-10-03
Also published as: CN111868361B; CN111868361A

Abstract

A selective catalytic reduction (SCR) information processing system comprises: an information receiving module configured to input information related to the exhaust gas SCR system of a vehicle; and an information processing module configured to automatically generate at least the calibration file of the exhaust gas SCR system and a system configuration data file on the basis of the input information of the information receiving module, the calibration file being used for being flashed into the ECU of the vehicle, and the system configuration data file being used for being stored and read, wherein the information related to the exhaust gas SCR system comprises at least: vehicle information, engine information, and exhaust gas SCR system component information. Also disclosed is an SCR information processing method. The SCR information processing system and method can reduce the strength and difficulty of calibration work, improve the precision of calibration work, and can implement exhaust gas SCR system layout and tracking of a calibration history as well as cross check between the exhaust gas SCR systems of different vehicles.

Description

Selective catalytic reduction information processing system and method

Technical field

The present application relates to a selective catalytic reduction (SCR) information processing system and method that is capable of automatically generating practical content related to calibration of an SCR system based on information of constituent elements of an exhaust gas SCR system.

Background technique

Worldwide, there are increasingly stringent emission limits for diesel engines, in which case SCR technology has been developed to reduce NOx levels in engine exhaust. In order to realize SCR, DEF (diesel exhaust gas treatment liquid, 23.5% urea aqueous solution, hereinafter referred to as urea) is used as a reducing agent, and the engine exhaust aftertreatment SCR system includes a liquid tank for pumping DEF from the DEF tank. A dose valve for metering the DEF into the exhaust pipe to reduce NOx content in the exhaust and a control unit for controlling system operation.

In such an SCR system, typically, the pump, metering valve, and control unit are provided in standard form and assembled in the vehicle. However, the engine or vehicle manufacturer (E/V-OEM) may have to purchase one or more other components, such as liquid level sensors for liquid tanks, temperature sensors, and the like. In addition, the vehicle may have a variety of different configurations, and thus the urea tube piping layout, urea tube length, and the like may vary. During the development of the new model, all of the above variables cause the engine or vehicle manufacturer to calibrate the SCR system through software so that the resulting SCR system can be operated as needed, which requires repeated high loads. Manual calibration of the job and may result in errors and difficulty in calibration tracking.

Summary of the invention

The present application is directed to solving the above problems in the prior art SCR system calibration process.

To this end, according to an aspect of the present application, a selective catalytic reduction (SCR) information processing system is provided, comprising: an information receiving module configured to receive information related to an exhaust gas SCR system of a vehicle; and information processing a module configured to automatically generate a calibration file and a system configuration data file of at least an exhaust gas SCR system based on information from the information receiving module, the calibration file being used to be flashed into an ECU of the vehicle, the system configuration file being used for Stored and read; wherein, the information related to the exhaust gas SCR system includes at least: vehicle information, engine information, and exhaust gas SCR system component information.

Some optional features of the SCR information processing system are defined in the appended dependent claims.

According to another aspect of the present application, there is provided a selective catalytic reduction (SCR) information processing method comprising the steps of: receiving information related to an exhaust SCR system of a vehicle; and automatically based on information from the information receiving module Generating at least a calibration file and a system configuration data file of the exhaust gas SCR system for controlling the SCR system to be written to the ECU of the vehicle, the system configuration data file being used for storage and reading; The information related to the exhaust gas SCR system includes at least: vehicle information, engine information, component information of the exhaust gas SCR system.

It should be noted that the SCR information processing method of the present application can be implemented by the SCR information processing system of the present application or applied to the SCR information processing system of the present application. Therefore, the features related to the SCR information processing system of the present application are equally applicable to the SCR information processing method of the present application.

According to the SCR information processing system and method of the present application, the calibration file of the exhaust gas SCR system, the system configuration data file, and the like can be automatically generated to replace the high-load manual manual information calibration process in the existing exhaust gas SCR system technology, thereby reducing the calibration operation. The strength and difficulty of the calibration work. In addition, tracking of the exhaust gas SCR system layout and calibration history and cross-checking between exhaust SCR systems of different vehicles can be achieved.

DRAWINGS

Figure 1 is a schematic illustration of an exhaust aftertreatment system in accordance with the present application;

2 is a schematic diagram of an SCR information processing system in accordance with one possible embodiment of the present application;

3 is a schematic diagram of a layout report generation process in the SCR information processing system of FIG. 2;

4 is a schematic diagram of a calibration file generation process in the SCR information processing system of FIG. 2;

FIG. 5 is a schematic diagram of a system configuration information generation flow in the SCR information processing system of FIG.

detailed description

The above described objects, features and advantages of the present application will become more apparent and understood.

The present application generally relates to an SCR information processing system for generating calibration files, installation checks, and system configuration data associated with an exhaust gas SCR system.

First, an exhaust gas SCR system that can be calibrated using the SCR information processing system of the present application is shown in FIG. 1 for processing the flow exhaust gas in the exhaust pipe 1 of an engine (especially a diesel engine) to reduce exhaust gas. NOx content. The exhaust gas SCR system includes an SCR catalyst 2 and a spray unit 3 disposed in the exhaust pipe 1. The injection unit 3 is located upstream of the SCR catalyst 2 for metering a tail gas treatment liquid (for example, a urea solution) into the tail gas stream in a metered manner, so that the exhaust gas is mixed with the exhaust gas treatment liquid and reacted in the SCR catalyst 2 to NOx is converted to nitrogen and water. The injection unit 3 is equipped with a cooling line 4 for cooling the injection unit 3. The coolant in the cooling line 4 may be an engine coolant.

A NOx sensor 5 is disposed on the exhaust pipe 1 on the downstream side of the SCR catalyst 2 for detecting the NOx content in the exhaust gas after the SCR treatment. In addition, other sensors such as pressure sensors, temperature sensors and the like are disposed on the exhaust pipe 1.

The exhaust gas treatment liquid sprayed by the injection unit 3 is supplied from the supply unit 6. The tail gas treatment liquid may be in the form of an aqueous urea solution or other forms. The supply unit 6 draws the exhaust gas treatment liquid in the liquid tank 7 through the suction line 8 and delivers it to the injection unit 3 through the pumping line 9. Further, a return line 10 is disposed between the supply unit 6 and the liquid tank 7. Heating elements 11 may be arranged in each of the

lines

8, 9, 10 for heating the exhaust gas treatment liquid flowing through the respective lines.

The liquid tank 7 is provided with a heating element 12 for heating the urea in the liquid tank 7, a temperature sensor 13 for detecting the temperature of the exhaust gas treatment liquid in the liquid tank 7, and a liquid level sensor 14 for detecting the liquid tank 7 The level of the tail gas treatment liquid.

The operation of the injection unit 3 is controlled by the control unit 15. The control unit 15 is also connected to the engine CAN 16 and the diagnostic CAN 18. In addition, the control unit 15 is also connected to various associated sensors, such as the aforementioned exhaust pipe 1 and various sensors provided in the tank 7, as well as other sensors that may be present, in order to receive the corresponding sensor signals 18. Furthermore, the control unit 15 can also be connected to the vehicle ECU/DCU.

The calibration file, installation check, and system configuration data of the exhaust gas SCR system described above can be generated by the SCR information processing system of the present application shown in FIG. 2.

The SCR information processing system of the present application may be implemented in the form of software or in the form of software plus hardware.

The SCR information processing system of the present application mainly includes a human-machine interaction interface, which includes an information receiving module and an information display module. The information receiving module is configured to input, by an engineer, information related to calibration of the exhaust gas SCR system. According to a possible implementation manner, the information receiving module is composed of a graphical interface on a human-computer interaction interface, and the graphic interface includes a plurality of corresponding input icons and input fields, so that an engineer can input information through the same.

The SCR information processing system further includes: an information processing module that automatically calculates various files related to the exhaust gas SCR system based on information from the information receiving module, and one or more of the generated files can be interacted by the human machine The interface information display module is shown to the engineer; the storage module is used to store files related to the exhaust gas SCR system; the optional information transmission module is used to connect with other devices (such as vehicle ECU) to transfer files related to the exhaust SCR system Go to or read files or information from other devices.

The SCR information processing system can be implemented for different items P1, P2, P3...Px, each item corresponding to a different vehicle type, a different model of the same type of vehicle, and the like. In each project, the engineer can use the SCR information processing system to automatically generate a file related to the calibration of the exhaust gas SCR system by means of its information processing module. For example, as shown in FIG. 2, three files are generated: layout report Doc1, calibration file Doc2, system configuration data file Doc3.

It can be considered that the basic scheme of the SCR information processing system of the present application is to be able to generate at least some of the layout check report, the calibration file, and the system configuration data file.

The operations that can be performed by the SCR information processing system of the present application are described below with reference to FIG. The corresponding operational steps also constitute an SCR information processing method in accordance with one possible embodiment of the present application.

First, in step S1, the engineer activates the SCR information processing system, for example by means of the human-machine interface.

Next, in step S2, input information relating to the exhaust gas SCR system is received, for example by means of the information receiving module. This input can be entered by the engineer or read from previously stored information.

According to an example, the following substeps are included in step S2:

Sub-step S21: input OEM name, engineer name, etc.;

Sub-step S22: input application information including engine information (including displacement, power, engine code, emission target), vehicle information (including target market, manufacturer name, vehicle type, vehicle weight, vehicle code, vehicle voltage) Wait, and upload a picture of the vehicle;

Sub-step S23: input information about a urea line (such as the previously described

lines

8, 9, 10, etc.), including pipeline specification parameters, pipeline heating details, pipeline arrangement path details, and the like;

Sub-step S24: input information of the liquid level sensor, including supplier, code, sensor specification parameters, and the like;

Sub-step S25: inputting other components in the exhaust gas SCR system (for example, various control valves, various other sensors related to storage and supply of processing liquid (flow, temperature, pressure, etc.), heating/cooling components, etc.) information;

Optional Step S26: Enter information about the options.

It should be noted that in sub-step S2, any required exhaust gas SCR system component information may be input according to actual needs, including the urea supply unit model and its component number, the injection unit model and its component number, the model of the control unit and its components. No., software version number, urea tube geometry, urea tube length and height difference, tank geometry, tank filter parameters, installation angle of the aforementioned components, etc. Furthermore, the sub-steps do not have to be performed in the order listed above, but rather the input steps can be selected depending on the particular application.

Next, based on the input information received in step S2, the layout report Doc1 is generated in step S3, the calibration file Doc2 is generated in step S4, and the system configuration data file Doc3 is generated in step S5, and the like. For example, these files can be generated by the information processing module.

The layout report Doc1 contains all input information, including special design information and content, which can be read and used by engineers (for example, by means of the information display module of the human-computer interaction interface or using other common document software such as Windows Office\Adobe Reader, etc. ), to determine the configuration of the exhaust gas SCR system, or even the entire post-processing system, such as the location, orientation, connection relationship of the various components, and so on. Layout Report Doc1's file format is a format that can be displayed on the screen, such as .doc or .pdf. In addition, the layout report Doc1 can also be used for routine discussions between engine or vehicle manufacturers and SCR system manufacturers. The corresponding archive file is also included in the layout report Doc1.

The calibration file Doc2, usually a DCM (Data Communication Module) file, contains calibration information for the exhaust gas SCR system and information about prompts for future tracking. The plurality of calibration files are summarized into a Hex format file that can be used to flash the vehicle ECU 20.

The system configuration data file Doc3, usually in a format suitable for storage (for example, an encoding format such as .dat, .mat or .txt), which contains all input information so that it can be stored and used in future time (for example, at input) In case of interruption) can be read by the SCR information processing system. The system configuration data file can be entered into a database 30 that stores such system configuration information for many applications to produce a big data application suitable for future use. According to one possible embodiment, the information content contained in the system configuration data file Doc3 is identical to the layout report Doc1, which are merely different file formats.

An exemplary flow for generating each of the files Doc1-Doc3 in the SCR information processing system is shown in Figs. In these flows, the corresponding input information is represented by sub-steps S21-S26 in step S2.

First, in the layout report generation flow shown in FIG. 3, all the information input in step S2 is substituted into the report template Tpl-1 in step S3 to generate the layout report Doc1. Layout Report Doc1's file format is a format suitable for display on the screen.

Next, in the calibration file generation flow shown in FIG. 4, the urea pipeline information (the pipeline specification parameter, the pipeline heating details, the pipeline arrangement path details, and the like) input in the sub-step S23 of step S2 is used in the sub-step of step S4. The emptying time of the exhaust gas SCR system (especially the urea line) is calculated in S41 according to a predetermined physical formula.

Specifically, the exhaust gas SCR system needs to evacuate urea due to treatment liquid deposition, low temperature icing, and the like. In the above sub-step S41, according to the relevant parameters of the exhaust gas SCR system, such as the specification, length, spatial position of the urea pipeline, the liquid supply capacity, the liquid supply pause time, etc., the time required for the urea evacuation operation and the urea are calculated. The time required to drain the operation.

Further, the calibration data of the liquid level sensor, the temperature sensor, and the like are determined in substep S42 of step S4 by using the information input in substeps S22, S24, and F25 of step S2. For example, the calibration data of the liquid level sensor depends on the resistance value of the sensor and its deviation from the ECU's upper and lower resistance values and their deviations, the supply voltage and its deviation, and so on.

Next, the results obtained in the sub-steps S41, S42 and the information input in the sub-step S26 are substituted into the calibration template Tpl-1 (the characteristics such as the name and length of the calibration variable are configured according to the specific controller, software version, etc. input in step S2) In order to generate the calibration file Doc2. The calibration file Doc2 contains data such as names, calibration values, and the like of various calibration objects.

In addition, the calibration file Doc2 may also contain remark information, such as information about customers, projects, etc., so that the calibration file Doc2 can be tracked.

It will be appreciated that calibration data and remark data for any other feature of interest in the exhaust gas SCR system may also be generated in the calibration file generation process.

The calibration file Doc2 is usually in DCM format and will be flashed into the vehicle ECU.

Next, in the system configuration data file generation flow shown in Fig. 5, all the information input in step S2 is converted into the system configuration data file Doc3 in accordance with the predetermined encoding format Fmt in step S5. The system configuration data file Doc3 can be efficiently read back by the SCR information processing system. And, the system configuration data file Doc3 is stored in the database for future use.

It can be understood that the information receiving module of the SCR information processing system described above can be used to perform the above step S2, the information processing module can be used to perform the above steps S3, S4, S5, and the file storage module can be used to store the file Doc1 described above. Doc2, Doc3. Of course, the SCR information processing system capable of performing the above operations can be constructed in any suitable form.

On the other hand, in the specific examples described above, the urea line in the exhaust gas SCR system and the liquid level sensor in the liquid tank are referred to as components required for the calibration of the exhaust gas SCR system, and are mentioned in an exemplary manner; The skilled person will understand that the information of other constituent elements and detection elements to be examined for calibration of the exhaust gas SCR system may also be input and subsequently processed and corresponding documents generated according to specific needs.

The SCR information processing system and method according to the present application can be used to process various variables during engine or vehicle manufacturer calibration of the exhaust gas SCR system, thereby enabling recording and utilizing vehicle overall information and component information based on the engineer's data To automatically generate the calibration file, system configuration data file, etc. of the SCR system. In this way, the manual manual information processing process of the prior art exhaust gas SCR system can be replaced by the automatic information processing process, which not only simplifies the strength and difficulty of the SCR system calibration operation, but also improves the versatility of the exhaust gas SCR system and its components, and Calibration of a specific vehicle exhaust SCR system is reliably achieved. In addition, historical tracking of the calibration data for the exhaust gas SCR system and cross-checking between the exhaust SCR systems of different vehicles can be achieved.

Although the application is described herein with reference to specific embodiments, the scope of the application is not limited to the details shown. Various modifications may be made to these details without departing from the basic principles of the application.

Claims

[Correct according to Rule 91 27.06.2018]

A selective catalytic reduction (SCR) information processing system comprising:

An information receiving module configured to receive information related to a vehicle exhaust SCR system;

An information processing module configured to automatically generate a calibration file and a system configuration data file of at least an exhaust gas SCR system based on input information from the information receiving module, the calibration file being used to be flashed into an ECU of the vehicle, the system configuration Data files are used for storage and reading;

The information related to the exhaust gas SCR system includes at least: vehicle information, engine information, and component information of the exhaust gas SCR system.
The SCR information processing system according to claim 1, wherein said vehicle information includes a vehicle manufacturer name, and said engine information includes an engine manufacturer name.
The SCR information processing system according to claim 1 or 2, wherein said exhaust gas SCR system component comprises at least: an exhaust gas treatment liquid supply unit, an exhaust gas treatment liquid injection unit, a controller, an exhaust gas treatment liquid tank, and an exhaust gas treatment liquid supply. Components, and related sensors.
The SCR information processing system according to claim 3, wherein said exhaust gas treatment liquid supply element comprises an exhaust gas treatment liquid line, and said exhaust gas SCR system component information includes corresponding pipeline specification parameters, pipeline heating details, and pipeline arrangement Path details.
The SCR information processing system according to any one of claims 1 to 4, wherein the sensor comprises a sensor equipped with an exhaust gas treatment liquid tank, such as a liquid level sensor, a tank temperature sensor, and an exhaust gas treatment liquid line. Sensors, such as flow sensors, temperature sensors, and sensors on the exhaust pipe, such as temperature sensors, nitrogen oxide sensors, differential pressure sensors, etc.; the exhaust gas SCR system component information contains corresponding sensor information.
The SCR information processing system according to claim 5, wherein said sensor information includes a sensor supplier, a sensor code, and a sensor specification parameter.
The SCR information processing system according to any one of claims 1 to 6, wherein the calibration file contains calibration information of the exhaust gas SCR system and remark information about prompts for future tracking.
The SCR information processing system of claim 7, wherein the information processing module is configured to process the input information of the information receiving module via a predetermined physical formula and bring it into a calibration template to generate the calibration file.
The SCR information processing system according to any one of claims 1 to 8, wherein the calibration file includes an exhaust gas SCR system exhaust gas treatment liquid emptying time.
The SCR information processing system according to any one of claims 7 to 9, wherein the calibration file is a DCM format file, and the calibration file is summarized into a Hex format file.
The SCR information processing system according to any one of claims 1 to 10, wherein the system configuration data file is stored in a database and is optionally used for a big data application.
The SCR information processing system according to claim 11, wherein said database includes system configuration data files of different SCR systems for implementing cross-checking.
The SCR information processing system according to any one of claims 1 to 12, wherein the information processing module is configured to convert all input information of the information receiving module into the system configuration data file according to a predetermined encoding format.
The SCR information processing system according to any one of claims 1 to 13, wherein the information processing module further configures to automatically generate a layout report of the exhaust gas SCR system based on input information from the information receiving module, the layout report being Open the reading for the format and common document processing software that is suitable for display on the screen.
[Correct according to Rule 91 27.06.2018]

A selective catalytic reduction (SCR) information processing method comprising the following steps:

Enter information related to the vehicle's exhaust SCR system;

Automatically generating a calibration file and a system configuration data file of at least an exhaust gas SCR system based on input information from the information receiving module, the calibration file being used to be flashed into an ECU of the vehicle, the system configuration data file being used for storage And reading;

The information related to the exhaust gas SCR system includes at least: vehicle information, engine information, and component information of the exhaust gas SCR system.