WO2019042069A1

WO2019042069A1 - Integrated wireless tail gas monitoring apparatus

Info

Publication number: WO2019042069A1
Application number: PCT/CN2018/098225
Authority: WO
Inventors: 陈一平
Original assignee: 罗伯特·博世有限公司; 陈一平
Priority date: 2017-08-29
Filing date: 2018-08-02
Publication date: 2019-03-07
Also published as: CN109424406A; CN109424406B

Abstract

An integrated wireless tail gas monitoring apparatus comprises: a tail gas sensor, used for detecting tail gas information to be exhausted by an engine to the atmosphere; and a wireless communication module (20b) integrated in a controller of an engine system, the controller acquiring the tail gas information and the wireless communication module (20b) is connected to a CPU of the controller in a mode where data may be transmitted therebetween, so that the wireless communication module (20b) is able to obtain the tail gas information in the controller and send the tail gas information wirelessly. The integrated wireless tail gas monitoring apparatus can reduce the manufacturing costs and the complexity, and also achieve high signal quality and reliability.

Description

Integrated exhaust wireless monitoring device

Technical field

The present application relates to a technique for remotely monitoring the exhaust emissions of an engine, particularly a diesel and/or natural gas engine.

Background technique

Vehicle engine exhaust contains a variety of harmful components. In order to reduce harmful components in the exhaust gas, various exhaust gas aftertreatment systems have been proposed. However, exhaust gas emissions may not be up to standard even after treatment with the exhaust gas aftertreatment system. This is because some of the exhaust gas treatment components in the exhaust aftertreatment system degrade in performance over time. When the performance of the exhaust gas treatment element is reduced to a certain extent, it needs to be replaced or regenerated. However, it is sometimes difficult to monitor the condition of the exhaust gas treatment element, and thus it is not replaced or regenerated in time, so that the exhaust gas aftertreatment system may not function properly, and thus the concentration of harmful components in the exhaust gas rises, resulting in the exhaust gas not meeting the discharge standard.

Traditionally, whether the engine exhaust meets emission standards can only be determined when on-site inspection. In recent years, techniques for remotely monitoring the exhaust quality of vehicles have been proposed. For example, FIG. 1 illustrates an existing technique for remotely transmitting engine exhaust data that is equipped with a separate wireless transmission unit 100 that can be coupled to an engine controller 200, wherein the wireless transmission unit 100 has a CPU 100a and a micro communication module 100b connected to each other. The CPU 100a is connected to the CPU 200a of the engine controller 200, for example, via a dedicated line or via a vehicle CAN to acquire exhaust gas detection data from the engine controller 200. The micro communication module 100b receives the exhaust gas detection data from the CPU 100a and wirelessly transmits the data to the remote monitoring station. This prior art requires a separate wireless transmission unit to be connected to the engine controller, thereby increasing manufacturing cost and complexity.

Summary of the invention

Accordingly, it is an object of the present application to provide a tail gas wireless monitoring technology that enables real-time remote monitoring of the exhaust gas quality of an engine, particularly a diesel and/or natural gas engine, at low cost.

The present application, in one aspect thereof, provides an integrated exhaust wireless monitoring device including: an exhaust gas sensor for detecting exhaust gas information generated by an engine to be discharged to the atmosphere; and wireless communication integrated in a controller of the engine system a module, the exhaust gas information is collected in the controller, and the wireless communication module is connected to the CPU of the controller in a data transferable manner, so that the wireless communication module can acquire the controller The exhaust gas information and the exhaust gas information are wirelessly transmitted.

According to a possible embodiment, the exhaust gas information is information of the concentration of the pollutants in the exhaust gas to be discharged to the atmosphere.

According to a possible embodiment, the exhaust gas information is a NOx concentration value in the exhaust gas to be discharged to the atmosphere; even a NOx concentration value only in the exhaust gas to be discharged to the atmosphere.

According to a possible embodiment, the exhaust gas sensor is a exhaust gas NOx sensor disposed at a downstream end of the engine exhaust pipe.

According to a possible embodiment, the controller is an engine controller that acquires the exhaust gas information via a controller area network bus.

According to a possible embodiment, a DeNOx controller is further integrated in the engine controller, and the DeNOx controller controls the selective catalytic reduction device to perform selective catalytic reduction treatment on NOx in the engine exhaust.

According to a possible embodiment, the controller is a DeNOx controller that controls a selective catalytic reduction device to perform selective catalytic reduction treatment on NOx in engine exhaust gas, and the DeNOx controller passes through a controller local area network The bus acquires the exhaust information.

According to a possible embodiment, the DeNOx controller adjusts the operation of the selective catalytic reduction device based on the exhaust gas information, in particular the NOx concentration value.

According to a possible embodiment, the controller is a sensor controller of the exhaust gas NOx sensor itself.

According to a possible implementation manner, the wireless communication module and the CPU of the controller establish a connection according to a data transmission standard such as UART, SPI, IIC, USB, and the like.

According to a possible implementation, the wireless communication module is configured to transmit the exhaust information to a remote monitoring station via a wireless communication station.

According to a possible implementation, the wireless communication module is configured to send the exhaust information to a smartphone equipped with a corresponding application.

The present application, in another aspect thereof, provides an engine controller configured to acquire exhaust gas information to be discharged to the atmosphere, a wireless communication module integrated in the engine controller, the wireless communication module and the engine control The CPUs of the devices are connected in a data transferable manner, so that the wireless communication module can acquire the exhaust gas information in the engine controller and wirelessly transmit the exhaust gas information.

The present application, in another aspect thereof, provides a DeNOx controller in an engine system configured to acquire exhaust gas information to be discharged to the atmosphere, the wireless communication module being integrated in the DeNOx controller, The wireless communication module is coupled to the CPU of the DeNOx controller in a transmittable manner such that the wireless communication module is capable of acquiring the exhaust gas information in the DeNOx controller and wirelessly transmitting the exhaust gas information.

The present application, in another aspect thereof, provides a exhaust exhaust NOx sensor in an engine exhaust aftertreatment system, the exhaust exhaust NOx sensor comprising a sensor controller combined with a NOx detecting portion and a NOx detecting portion, the sensor controller A wireless communication module is integrated, the wireless communication module being configured to wirelessly transmit the NOx concentration value detected by the NOx detecting portion.

It should be noted that some or all of the technical features of the integrated exhaust gas wireless monitoring device described above are equally applicable to the above-described engine controller, DeNOx controller, and exhaust exhaust NOx sensor, and will not be repeatedly described herein.

According to the application, the exhaust gas detection information is directly transmitted to the remote monitoring station through the wireless communication module integrated in the controller, and the quality of the engine exhaust emission can be detected in real time, and the notification is timely when the exhaust gas quality is unqualified. This integrated exhaust wireless monitoring device reduces manufacturing cost and complexity while achieving high signal quality and reliability.

DRAWINGS

1 is a schematic block diagram of a remotely transmitted engine exhaust data technique in accordance with the prior art.

2 is a schematic diagram of an engine system including an exhaust gas wireless monitoring device in accordance with one possible embodiment of the present application, wherein the wireless communication module is integrated with the engine controller

3 is a schematic diagram of an engine system including a tail gas wireless monitoring device in accordance with another possible embodiment of the present application, wherein the wireless communication module is integrated with the DeNOx controller.

4 is a schematic diagram of an engine system including a tail gas wireless monitoring device in accordance with another possible embodiment of the present application, wherein the wireless communication module is integrated with the NOx sensor.

Figure 5 is a schematic block diagram of the NOx sensor controller of Figure 4.

Detailed ways

The following figures describe some possible implementations of the present application.

The present application is generally directed to engine exhaust wireless monitoring technology. The present application is applicable to engines of various equipments or vehicles, and is particularly suitable for medium and large-sized equipment or vehicles, such as medium and large passenger cars, municipal vehicles, engineering vehicles, etc., especially for medium and large vehicles fueled by diesel and/or natural gas. engine.

The present application proposes an engine exhaust wireless monitoring device that cooperates with an engine system, particularly an engine exhaust aftertreatment system. As shown in FIG. 2, the engine system includes an engine (such as a diesel and/or natural gas engine) 1 and an exhaust aftertreatment system for processing the exhaust of the engine 1. The exhaust aftertreatment system includes various exhaust gas treatment components arranged in sequence along the exhaust pipe 2 of the engine 1, and these exhaust gas treatment components include, but are not limited to, an oxidation catalytic device 3, a particulate filtering device 4, and a selective catalytic reduction (SCR) device. 5 and ammonia slip catalyst device 6.

The oxidation catalyst device 3 is used to oxidize HC and CO in the exhaust gas. The particulate filtering device 4 can effectively capture particulate matter in the exhaust gas. The SCR device 5 reduces the NOx concentration in the exhaust gas by means of urea injected by the urea nozzle 7 of the urea (for example AdBlue) supply module. The ammonia slip catalyst device 6 disposed at the extreme end on the exhaust pipe 2 reduces ammonia leaking into the environment.

The exhaust aftertreatment system also includes various sensors disposed on the exhaust pipe 2 or the exhaust gas treatment component for detecting various indicators of the exhaust gas. These sensors are connected to the vehicle's controller area network bus (CAN) 10 and transmit test information via CAN 10. These sensors include, but are not limited to, an incoming exhaust NOx sensor 11 located immediately upstream of the exhaust pipe 2 and an immediately adjacent hydrocarbon sensor 12, a first temperature sensor 13 located at the inlet end of the oxidation catalytic device 3, located in the oxidation catalytic device 3 a second temperature sensor 14 between the particulate filter device 4 and a differential pressure sensor 15 for detecting a pressure difference between the inlet end of the oxidation catalyst device 3 and the outlet end of the particulate filter device 4, located at the outlet end of the particulate filter device 4 The third temperature sensor 16, a fourth temperature sensor 17 located at the outlet end of the ammonia slip catalyst device 6, and a discharge exhaust NOx sensor 18 disposed immediately adjacent.

The engine controller 20 is used to control the operation of the engine 1 and is coupled to the CAN 10 to communicate engine control parameters to the engine 1, and to acquire various engine operating parameters from the engine 1 and to acquire detection parameters and the like from the aforementioned sensors.

The DeNOx controller 30 controls the operation of the SCR device 5, particularly the urea supply module and the urea nozzle 7, and controls their operation.

In the embodiment shown in FIG. 2, the DeNOx controller 30 is integrated into the engine controller 20, ie, forms part of the engine controller 20. The DeNOx controller 30 is connected to and controlled by the CPU 20a of the engine controller 20.

According to a possible implementation of the present application, the wireless communication module 20b for wirelessly transmitting the information of the exhaust gas to be discharged after being processed by the exhaust gas aftertreatment system is integrated in the engine controller 20, that is, the wireless communication module 20b constitutes the engine controller 20. Part of it. The wireless communication module 20b is connected to the CPU 20a by means of data transfer, for example, according to data transmission standards such as UART, SPI, IIC, and USB. The exhaust information wirelessly transmitted by the wireless communication module 20b contains at least information on the concentration of the pollutants in the exhaust gas to be discharged.

An exhaust gas wireless monitoring apparatus according to an embodiment of the present application includes the above-described engine controller 20 integrated with a wireless communication module 20b for wirelessly transmitting exhaust gas information, and a corresponding sensor for detecting emission exhaust gas indexes, particularly pollutants in exhaust gas emissions. . The above-described exhaust wireless monitoring device also cooperates with the wireless communication station 40, the remote monitoring station 50, etc., as described below.

The wireless communication module 20b can acquire the exhaust gas information collected by each sensor from the CPU 20a, and can transmit the exhaust gas information to the wireless communication station 40. In addition, the wireless communication module 20b can also acquire relevant parameters of the engine and transmit it to the wireless communication station 40. The wireless communication station 40 can transmit the received exhaust gas information and possibly engine related parameters to the remote monitoring station 50. The remote monitoring station 50 can include a cloud storage unit, a data analysis and statistics unit, an exhaust gas monitoring unit, a notification unit, and the like. It is used to perform various processing on data acquired from the wireless communication station 40.

In addition, the wireless communication module 20b integrated in the engine controller 20 can also transmit exhaust information to the vehicle driver or the owner's smartphone 60. The remote monitoring station 50 can also communicate with the driver or the owner's smartphone 60 via the wireless communication station 40. The corresponding application should be installed in the smartphone 60.

According to a preferred embodiment, the present application uses the NOx concentration value in the exhaust gas to be discharged into the atmosphere in the most downstream end of the exhaust pipe 2 as a representative of the exhaust gas information wirelessly transmitted by the wireless communication module 20b, that is, located in the exhaust pipe. The NOx concentration value in the exhaust gas detected by the exhaust tail gas NOx sensor 18 at the most downstream end is wirelessly transmitted by the wireless communication module 20b as an index characterizing the exhaust gas emission quality. The NOx concentration value in the exhaust gas to be discharged into the atmosphere is selected as an index for characterizing the exhaust gas emission quality because the NOx concentration value is generally considered to be the most important index of the exhaust gas quality. Therefore, wirelessly transmitting a single piece of information on the NOx concentration value can accurately reflect the exhaust gas emission quality. Of course, it can be understood that the scope of the present application also covers a scheme in which the exhaust gas information sent by the wireless communication module 20b further includes other exhaust gas detection information.

The engine controller 20 acquires the NOx concentration value detected by the exhaust exhaust NOx sensor 18 via the CAN 10, and transmits the NOx concentration value from the wireless communication module 20b to the wireless communication station 40, and wirelessly transmits it to the remote monitoring station 50 via the wireless communication station 40. In the remote monitoring station 50, the NOx concentration values in the exhaust gas are recorded, stored, analyzed, and monitored. If the remote monitoring station 50 finds that the NOx concentration in the exhaust exceeds the standard, the notification unit of the remote monitoring station 50 issues a notification to the driver to inform the driver or the owner that the exhaust is unqualified. The vehicle may receive notification from the remote monitoring station 50 via a wireless communication module in the DeNOx controller 30 or other wireless communication module in the vehicle. Additionally, the remote monitoring station 50 can send a notification to the smartphone 60 to alert the driver or owner. In addition, the remote monitoring station 50 can transmit information of the exhausted unqualified vehicle to the vehicle emission monitoring department via wireless or wired means.

In this way, substandard engine exhaust quality is monitored in real time and fed back to the driver, owner or monitoring department. The driver or the owner can overhaul, replace or regenerate the exhaust gas treatment components in the exhaust aftertreatment system for this condition.

Further, the DeNOx controller 30 can also automatically adjust the urea injection of the urea supply module into the SCR device 5 in accordance with the NOx concentration detected by the exhaust gas NOx sensor 18 in an attempt to reduce the NOx concentration in the exhaust gas by the operation of the SCR device 5 as much as possible.

As an alternative to the example shown in Fig. 2, the DeNOx controller 30 is provided separately from the engine controller 20 and is connected in the form of transmittable data. In this alternative, only the wireless communication module 20b is integrated in the engine controller 20. Other aspects of the alternative are the same or similar to those described in Figure 2 and will not be described in detail herein.

An engine system including a tail gas wireless monitoring device in accordance with another possible embodiment of the present application is shown in FIG. 3, wherein the DeNOx controller 30 is provided separately from the engine controller 20, and integrated in the DeNOx controller 30 for wireless transmission. The wireless communication module 30b, which is the concentration of the pollutant concentration in the exhaust gas to be discharged after being treated by the exhaust gas aftertreatment system, that is, the wireless communication module 30b constitutes a part of the DeNOx controller 30. The wireless communication module 30b is connected to the CPU 30a of the DeNOx controller 30 by means of data transfer, for example, according to data transmission standards such as UART, SPI, IIC, USB, and the like.

An exhaust gas wireless monitoring apparatus according to an embodiment of the present application includes the above-described DeNOx controller 30 integrated with a wireless communication module 30b for wirelessly transmitting exhaust gas information, and a corresponding sensor for detecting emission exhaust gas indexes, particularly pollutants in exhaust gas emissions. .

The DeNOx controller 30 acquires the pollutant index in the exhaust gas detected by the corresponding sensor via the CAN 10, in particular, the NOx concentration value detected by the exhaust gas NOx sensor 18. The wireless communication module 30b acquires the exhaust gas information to be discharged, in particular, the pollutant index in the exhaust gas, particularly the NOx concentration value, from the CPU 30a of the DeNOx controller 30, and wirelessly transmits it to the wireless communication station 40. In this way, the wireless communication station 40 can transmit the received exhaust information and possibly engine related parameters to the remote monitoring station 50. The remote monitoring station 50 can include a cloud storage unit, a data analysis and statistics unit, an exhaust gas monitoring unit, and a notification unit. And the like, for performing various processing on data acquired from the wireless communication station 40.

Similarly, the wireless communication module 30b can also send exhaust information to the smartphone 60 with the associated application. Likewise, the DeNOx controller 30 can automatically adjust the urea injection of the urea supply module into the SCR device 5 based on the NOx concentration detected by the exhaust NOx sensor 18 in an attempt to reduce the NOx concentration in the exhaust gas as much as possible by operation of the SCR device 5.

Other aspects of the embodiment of Figure 3 are the same or similar to the embodiment of Figure 2 and will not be described in detail herein.

An engine system including a exhaust gas wireless monitoring device according to another possible embodiment of the present application is shown in FIGS. 4 and 5, wherein the exhaust exhaust NOx sensor 18 has a NOx detecting portion and a sensor controller combined with the NOx detecting portion 180. The wireless controller module 180b for wirelessly transmitting the NOx concentration value in the exhaust gas to be discharged after being processed by the exhaust gas aftertreatment system is integrated in the sensor controller 180, that is, the wireless communication module 180b constitutes a part of the sensor controller 180. The wireless communication module 1800b is connected to the CPU 180a of the sensor controller 180 by means of data transfer, for example, according to data transmission standards such as UART, SPI, IIC, USB, and the like. The sensor controller 180 integrated with the wireless communication module 180b and the NOx detecting portion are in turn integrated into the exhaust exhaust NOx sensor 18 in the form of a single device.

An exhaust gas wireless monitoring apparatus according to an embodiment of the present application includes the above-described sensor controller 180 integrated with a wireless communication module 180b for wirelessly transmitting a NOx concentration value in exhaust emissions, and a exhaust exhaust NOx sensor 18.

Since the wireless communication module 180b is integrated in the sensor controller 180 that discharges the exhaust NOx sensor 18, the NOx concentration value in the exhaust gas detected by the exhaust NOx sensor 18 can be directly obtained from the CPU 180a of the sensor controller 180. Thereafter, the wireless communication module 180b exhaust NOx concentration value is transmitted to the wireless communication station 40, and the wireless communication station 40 can transmit the received exhaust gas information to the remote monitoring station 50. Similarly, the wireless communication module in the sensor controller can also transmit exhaust NOx concentration value information to the smartphone 60.

Other aspects of the embodiment of Figures 4, 5 are the same as or similar to the embodiment of Figure 2 and will not be described in detail herein.

Other embodiments for implementing the principles of the present application can be devised by those skilled in the art in light of the various embodiments described herein.

According to the exhaust wireless monitoring device of the present application, the exhaust gas detection information is directly wirelessly transmitted to the remote monitoring station through the wireless communication module integrated in the controller in the engine system, and the quality of the engine exhaust gas can be detected in real time, and the exhaust gas quality is In case of failure, a notice will be sent to the driver or the owner in time to be able to diagnose or dispose of the unqualified exhaust gas condition in time.

The integration of the wireless communication module into a controller as referred to in the present application means that the wireless communication module is constructed as an integral part of the controller, and finally presented in the form of a single controller, rather than referring to wireless communication. The module and the controller are each constructed as separate components and are connected by means of a means to communicate therebetween.

Since the wireless communication module is integrated in a controller and connected to the CPU of the controller, it is not necessary to provide a separate wireless communication module as in the prior art and establish a connection between it and a certain controller. Therefore, the manufacturing cost and complexity of the exhaust gas wireless monitoring device of the present application can be reduced. In addition, in the controller thus integrated with the wireless communication module, the communication between the wireless communication module and the controller CPU is more convenient, fast, and reliable.

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

An integrated exhaust wireless monitoring device includes:

An exhaust gas sensor for detecting exhaust gas information generated by the engine to be discharged to the atmosphere;

a wireless communication module integrated in a controller of the engine system, wherein the exhaust gas information is collected in the controller, and the wireless communication module is connected to the CPU of the controller in a manner capable of transmitting data, so that The wireless communication module is capable of acquiring the exhaust gas information in the controller and wirelessly transmitting the exhaust gas information.
The integrated exhaust wireless monitoring device according to claim 1, wherein said exhaust gas information is information of a concentration of a pollutant in an exhaust gas to be discharged to the atmosphere, in particular, a NOx concentration value;

Optionally, the exhaust gas information is only a NOx concentration value in the exhaust gas to be discharged to the atmosphere.
The integrated exhaust wireless monitoring device of claim 1 or 2, wherein the exhaust gas sensor is a exhaust exhaust NOx sensor (18) disposed at a downstream end of the engine exhaust pipe.
The integrated exhaust wireless monitoring device according to any one of claims 1 to 3, wherein the controller is an engine controller (20), and the engine controller (20) is via a controller area network bus (10) Obtain the exhaust information.
The integrated exhaust wireless monitoring device according to claim 4, wherein said engine controller (20) is further integrated with a DeNOx controller (30) that controls the selective catalytic reduction device ( 5) Selective catalytic reduction of NOx in the engine exhaust.
The integrated exhaust wireless monitoring device according to any one of claims 1 to 3, wherein the controller is a DeNOx controller (30), and the DeNOx controller (30) controls a selective catalytic reduction device (5) A selective catalytic reduction process is performed on NOx in the engine exhaust, and the DeNOx controller (30) acquires the exhaust gas information via a controller local area network bus (10).
The integrated exhaust wireless monitoring device according to claim 5 or 6, wherein said DeNOx controller (30) adjusts operation of said selective catalytic reduction device (5) based on said exhaust gas information, particularly NOx concentration value .
The integrated exhaust wireless monitoring device of claim 3 wherein said controller is a sensor controller (180) that discharges exhaust NOx sensor (18) itself.
The integrated exhaust wireless monitoring device according to any one of claims 1 to 8, wherein the wireless communication module and the CPU of the controller establish a connection according to a data transmission standard such as UART, SPI, IIC, USB, etc. .
The integrated exhaust wireless monitoring device according to any one of claims 1 to 9, wherein the wireless communication module is configured to transmit the exhaust information to a remote monitoring station (50) via a wireless communication station (40);

Optionally, the wireless communication module is configured to send the exhaust information to a smartphone (60) equipped with a corresponding application.
An engine controller (20) configured to acquire exhaust gas information to be discharged to the atmosphere, wherein the engine controller (20) is integrated with a wireless communication module (20b), the wireless communication module (20b) The CPU (20a) of the engine controller (20) is connected in a data transferable manner, so that the wireless communication module (20b) can acquire the exhaust gas information in the engine controller (20) and exhaust Information is sent wirelessly.
A DeNOx controller (30) in an engine system, the DeNOx controller (30) being configured to be capable of acquiring exhaust gas information to be discharged to the atmosphere, the wireless communication module (30b) being integrated in the DeNOx controller (30) The wireless communication module (30b) is coupled to the CPU (30a) of the DeNOx controller (30) in a data transferable manner such that the wireless communication module (30b) can acquire the DeNOx controller ( The exhaust gas information in 30) and the exhaust gas information are wirelessly transmitted.
A discharge exhaust NOx sensor (18) in an engine exhaust aftertreatment system, the exhaust exhaust NOx sensor (18) comprising a sensor controller (180) combined with a NOx detecting portion and a NOx detecting portion, the sensor controller A wireless communication module (180b) is integrated in (180), and the wireless communication module is configured (180b) to wirelessly transmit the NOx concentration value detected by the NOx detecting portion.