CN212727057U - Nitrogen oxygen sensor analogue means - Google Patents

Nitrogen oxygen sensor analogue means Download PDF

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Publication number
CN212727057U
CN212727057U CN202021956400.7U CN202021956400U CN212727057U CN 212727057 U CN212727057 U CN 212727057U CN 202021956400 U CN202021956400 U CN 202021956400U CN 212727057 U CN212727057 U CN 212727057U
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data
nitrogen
external
integrated circuit
interface
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刘鹏
鹿新弟
段军
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FAW Jiefang Automotive Co Ltd
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FAW Jiefang Automotive Co Ltd
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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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Abstract

The embodiment of the utility model discloses nitrogen oxygen sensor analogue means. Wherein, the device includes: the integrated circuit chip, the external rack CAN interface and the external rack DC power supply interface; the integrated circuit chip is respectively connected with an external rack CAN interface and an external rack DC power supply interface, is used for carrying out data interaction with external equipment through the external rack CAN interface and is used for acquiring electric quantity through the external rack DC power supply interface; the external rack CAN interface is connected with external equipment and used for acquiring data sent by the external equipment and sending the data of the integrated circuit chip to the external equipment; and the external rack direct-current power supply interface is connected with an external power supply and used for supplying power to the integrated circuit chip. Through the nitrogen oxygen sensor simulation device, the engine can run under the condition that the nitrogen oxygen sensor is not installed.

Description

Nitrogen oxygen sensor analogue means
Technical Field
The embodiment of the utility model provides a relate to the singlechip technique, especially relate to a nitrogen oxygen sensor analogue means.
Background
When the engine leaves factory and tests, need detect the engine according to the nitrogen oxygen content of car, from emission monitoring demand and experiment cost requirement, the engine manufacturer can not all install nitrogen oxygen sensor on every engine platform frame that tries on the car that leaves factory.
For an engine on a test run bench without a nitrogen-oxygen sensor, a method for randomly inspecting the engine is needed to ensure that the engine which leaves a factory meets the requirements. However, for the factory test rack without a mounted nox sensor or with a mounted nox sensor but damaged sensor, because the engine receives insufficient nox content, the situation of insufficient engine power may occur during the test run, and fault codes such as "nox sensor communication timeout" of the engine ECU (Electronic Control Unit) cannot be deleted in time, which results in the test run not being completed at all and affects the test run efficiency.
Disclosure of Invention
The embodiment of the utility model provides a nitrogen oxygen sensor analogue means to improve the efficiency of taking a trial run of engine.
The embodiment of the utility model provides a nitrogen oxygen sensor simulation device, which comprises an integrated circuit chip, an external rack CAN interface and an external rack DC power supply interface;
the integrated circuit chip is respectively connected with an external rack CAN interface and an external rack DC power supply interface, is used for carrying out data interaction with external equipment through the external rack CAN interface, and is used for acquiring the electric quantity of an external power supply through the external rack DC power supply interface;
the external rack CAN interface is respectively connected with an external device and an integrated circuit chip and is used for acquiring data sent by the external device and sending the data of the integrated circuit chip to the external device;
and the external rack direct-current power supply interface is respectively connected with an external power supply and the integrated circuit chip and used for supplying power to the integrated circuit chip.
Optionally, the apparatus further includes a CAN transceiver and a power module;
the CAN transceiver is connected between the integrated circuit chip and an external rack CAN interface and is used for converting the data formats of the external rack CAN interface and the integrated circuit chip;
the power module is connected between the integrated circuit chip and an external rack direct-current power supply interface, and is used for converting the original voltage acquired by the external rack direct-current power supply interface into a target voltage and transmitting the target voltage to the integrated circuit chip.
Optionally, the integrated circuit chip includes a data receiving module, a data analyzing module and a data outputting module;
the data receiving module is respectively connected with the CAN transceiver and the data analysis module, and is used for receiving external equipment data acquired by the external rack CAN interface through the CAN transceiver and sending the external equipment data to the data analysis module; wherein the external equipment data comprises torque, rotating speed and heating signals of the engine and nitrogen and oxygen signals of the nitrogen and oxygen sensor;
the data analysis module is respectively connected with the data receiving module and the data output module, and is configured to: if the data receiving module receives an actual nitrogen-oxygen signal of a nitrogen-oxygen sensor, determining whether the data receiving module receives a heating signal of an engine;
and is also used for: if the data receiving module receives the heating signal, determining that the nitrogen oxygen sensor simulation device stops working;
and is also used for: if the heating signal is not received, controlling the data output module to send an analog heating signal to the nitrogen oxygen sensor;
and is also used for: if the data receiving module does not receive an actual nitrogen and oxygen signal of a nitrogen and oxygen sensor, controlling the data receiving module to obtain the torque and/or the rotating speed of the engine, determining a simulated nitrogen and oxygen signal related to the torque and/or the rotating speed according to a preset nitrogen and oxygen signal query table, and sending the simulated nitrogen and oxygen signal to the data output module;
and the data output module is respectively connected with the data analysis module and the CAN transceiver and is used for receiving the target data analyzed by the data analysis module and sending the target data to the CAN transceiver.
Optionally, the integrated circuit chip further includes a data display module;
and the data display module is connected with the data output module and is used for displaying the simulated nitrogen oxygen signal.
Optionally, the integrated circuit chip is a single chip microcomputer.
Optionally, the interface types of the external rack CAN interface and the external rack dc power supply interface include at least one of the following: USB, SATA, E-SATA, TF, CF, and SD.
Optionally, a memory is integrated in the integrated circuit chip and used for storing data of an external device and a nitrogen-oxygen signal query table.
The embodiment of the utility model provides a through being connected integrated circuit chip with external rack CAN interface and external rack DC power source interface respectively, realize with external equipment's data interaction, make external equipment under the condition that does not have nitrogen oxygen sensor or nitrogen oxygen sensor to damage, CAN receive nitrogen oxygen sensor analogue means's simulation nitrogen oxygen signal, make the engine CAN normally work, avoid because nitrogen oxygen sensor's trouble causes the influence to the engine, improve the efficiency of taking a trial run to the engine.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of an analog device of a NOx sensor;
FIG. 2 is a schematic structural diagram of an exemplary embodiment of an analog device of a NOx sensor;
FIG. 3 is a schematic structural diagram of an exemplary embodiment of an analog device of a NOx sensor;
FIG. 4 is a schematic structural diagram of an exemplary NOx sensor simulation apparatus according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a nitrogen oxygen sensor simulation apparatus provided by an embodiment of the present invention, as shown in fig. 1, an integrated circuit chip 10 is connected to an external rack CAN interface 20 and an external rack dc power supply interface 30 respectively. The integrated circuit chip 10 performs data interaction with external devices such as a motor and a nitrogen-oxygen sensor through the external rack CAN interface 20. The integrated circuit chip 10 may obtain external device data through the external gantry CAN interface 20, such as a heating signal of a motor and an actual nitrogen-oxygen signal of a nitrogen-oxygen sensor. The actual nitrogen oxygen signal is a signal containing nitrogen oxygen content sent by the nitrogen oxygen sensor during normal operation. If the external rack CAN interface 20 does not have an external nitrogen-oxygen sensor or the nitrogen-oxygen sensor fails, the integrated circuit chip 10 cannot receive an actual nitrogen-oxygen signal. The heating signal can be sent by an engine ECU or a post-processing DCU (urea injection Control Unit), and the nitrogen oxygen sensor needs to be automatically heated for a period of time before normal operation, so that the nitrogen oxygen content in the tail gas can be accurately measured. In order to avoid the situation that the nitrogen-oxygen sensor is heated in the presence of dew, so that the ceramic body of the nitrogen-oxygen sensor is cracked, the nitrogen-oxygen sensor usually needs to be heated after receiving a heating signal sent by an engine ECU or a post-processing DCU. In consideration of the actual situation that the post-processing DCU is not installed during the trial run in a workshop, the heating signal of the external equipment is only sent by the engine ECU.
The external rack CAN interface 20 is respectively connected with the integrated circuit chip 10 and the external device, so that the data of the external device CAN be acquired, and the data of the integrated circuit chip 10 CAN be sent to the external device. For example, the integrated circuit chip 10 receives an actual nitrogen-oxygen signal of an external nitrogen-oxygen sensor, but does not receive a heating signal of an engine ECU, and in order to heat the nitrogen-oxygen sensor by receiving the heating signal, the integrated circuit chip 10 sends an analog heating signal to the nitrogen-oxygen sensor through the external rack CAN interface 20, so that the normal use of the nitrogen-oxygen sensor is realized. The external rack direct-current power supply interface 30 is respectively connected with the integrated circuit chip 10 and an external power supply, and the external rack direct-current power supply interface 30 supplies power to the integrated circuit chip 10 through the external power supply, so that the normal work of the integrated circuit chip 10 is ensured.
In this embodiment, optionally, the nitrogen oxygen sensor simulation apparatus further includes a CAN transceiver and a power module; the CAN transceiver is connected between the integrated circuit chip and the external rack CAN interface and is used for converting the data formats of the external rack CAN interface and the integrated circuit chip; and the power supply module is connected between the integrated circuit chip and the external rack direct-current power supply interface, and is used for converting the original voltage acquired by the external rack direct-current power supply interface into a target voltage and transmitting the target voltage to the integrated circuit chip.
Specifically, fig. 2 is a schematic structural diagram of a nitrogen oxygen sensor simulation apparatus according to an embodiment of the present invention. The CAN transceiver 40 is connected between the integrated circuit chip 10 and the external rack CAN interface 20, and the CAN transceiver 40 is used for converting the format of the received external device data in the external rack CAN interface 20 and the format of the received data in the integrated circuit chip 10. For example, a physical signal of an external device may be converted into hexadecimal which can be read by the integrated circuit chip 10. The power module 50 is connected between the integrated circuit chip 10 and the external rack dc power interface 30, and the power module 50 is configured to convert an original voltage acquired by the external rack dc power interface 30 into a target voltage and transmit the target voltage to the integrated circuit chip 10. The original voltage is obtained by the external rack dc power interface 30, and the target voltage is a voltage that can be used by the integrated circuit chip 10. For example, the voltage obtained by the external rack dc power interface 30 is 220 v, and the power module 50 can convert the 220 v voltage into 5 v voltage for the integrated circuit chip 10 to use.
In this embodiment, optionally, the integrated circuit chip includes a data receiving module, a data analyzing module and a data outputting module; the data receiving module is respectively connected with the CAN transceiver and the data analysis module, and is used for receiving external equipment data acquired by the CAN interface of the external rack through the CAN transceiver and sending the external equipment data to the data analysis module; wherein, the external equipment data comprises the torque, the rotating speed and the heating signal of the engine and the nitrogen and oxygen signal of the nitrogen and oxygen sensor; the data analysis module is respectively connected with the data receiving module and the data output module and is used for: if the data receiving module receives an actual nitrogen-oxygen signal of the nitrogen-oxygen sensor, determining whether the data receiving module receives a heating signal of the engine; and is also used for: if the data receiving module receives the heating signal, determining that the nitrogen-oxygen sensor simulation device stops working; and is also used for: if the heating signal is not received, sending an analog heating signal to the data output module; and is also used for: if the data receiving module does not receive the actual nitrogen and oxygen signals of the nitrogen and oxygen sensor, the data receiving module is controlled to obtain the torque and/or the rotating speed of the engine, the simulated nitrogen and oxygen signals related to the torque and/or the rotating speed are determined according to a preset nitrogen and oxygen signal query table, and the simulated nitrogen and oxygen signals are sent to the data output module; and the data output module is respectively connected with the data analysis module and the CAN transceiver and used for receiving the target data analyzed by the data analysis module and sending the target data to the CAN transceiver, wherein the target data comprises a simulated heating signal and a simulated nitrogen-oxygen signal.
Specifically, fig. 3 is a schematic structural diagram of a nitrogen oxygen sensor simulation apparatus according to an embodiment of the present invention. The integrated circuit chip 10 may include a data receiving module 110, a data analyzing module 120, and a data outputting module 130. The data receiving module 110 is connected to the CAN transceiver 40 and the data analyzing module 120, respectively, and the data receiving module 110 is configured to receive external device data acquired by the external rack CAN interface 20 through the CAN transceiver 40 and send the external device data to the data analyzing module 120. Wherein, the external equipment data can comprise the torque, the rotating speed, the heating signal of the engine and the nitrogen oxygen signal of the nitrogen oxygen sensor. For example, the CAN transceiver 40 receives the engine speed acquired by the external gantry CAN interface 20, performs format conversion on the engine speed, and transmits the converted data to the data receiving module 110.
The data analysis module 120 is connected to the data receiving module 110 and the data output module 130, respectively, and the data analysis module 120 may analyze the external device data acquired by the data receiving module 110, and send the analyzed data to the data output module 130 as target data. The data receiving module 110 may receive an actual nox signal of the nox sensor, and if the data receiving module 110 receives the actual nox signal of the nox sensor, it indicates that the vehicle for test run is equipped with the nox sensor and the nox sensor is working normally. The data analysis module 120 determines whether the data receiving module 110 receives a heating signal of the engine, and if the data receiving module receives the heating signal, it indicates that the engine and the nox sensor are both working normally, and at this time, the nox sensor simulator is not needed, so the data analysis module 120 can analyze to draw a conclusion that the nox sensor simulator stops working. If the data receiving module 110 does not receive the heating signal of the engine, in order to enable the nox sensor to receive the heating signal, the data analyzing module 120 determines that the heating signal needs to be sent to the nox sensor by the nox sensor simulation apparatus at this time, and the data analyzing module 120 generates the simulated heating signal, and sends the simulated heating signal as the target data to the data output module 130, and the data output module 130 sends the target data to the nox sensor. The analog heating signal is a heating signal which is sent by the integrated circuit chip 10 and enables the nitrogen oxygen sensor to work normally.
If the data receiving module 110 does not receive the actual NOx signal of the NOx sensor, it indicates that the NOx sensor is not installed on the vehicle or the NOx sensor is damaged. The data analysis module 120 controls the data receiving module 110 to obtain engine parameters such as torque and/or rotation speed of the engine, and the data analysis module 120 pre-stores the correlation between the engine parameters and the simulated nitrogen-oxygen signal, that is, the nitrogen-oxygen signal lookup table, where the simulated nitrogen-oxygen signal contains the nitrogen-oxygen content queried by the integrated circuit chip 10. According to different torques and/or rotating speeds, corresponding simulated nitrogen and oxygen signals can be obtained through inquiry, and after the simulated nitrogen and oxygen signals are obtained, the data analysis module 120 sends the simulated nitrogen and oxygen signals serving as target data to the data output module 130. The data analysis module 120 further stores the correlation between the different simulated nitrogen and oxygen signals, and after the data analysis module 120 obtains the simulated nitrogen and oxygen signals, the data analysis module searches the rationality result corresponding to the simulated nitrogen and oxygen signals from the nitrogen and oxygen signal rationality table to determine the rationality of the simulated nitrogen and oxygen signals, for example, the nitrogen and oxygen signal rationality may include that the nitrogen and oxygen content is less, normal, and exceeds the standard, etc. The data analysis module 120 may send the rationality result to the data output module 130 as target data.
The data output module 130 is connected to the data analysis module 120 and the CAN transceiver 40, respectively, and the data output module 130 is configured to receive target data analyzed by the data analysis module 120, where the target data may be, for example, a rationality result of the analog heating signal, the analog nitrogen oxygen signal, and the analog nitrogen oxygen signal. The data output module 130 transmits the target data to the CAN transceiver 40 so that the nox sensor or the engine operates normally.
In this embodiment, optionally, the integrated circuit chip further includes a data display module; and the data display module is connected with the data output module and is used for displaying the simulated nitrogen oxygen signal.
Specifically, fig. 4 is a schematic structural diagram of a nitrogen oxygen sensor simulation apparatus according to an embodiment of the present invention. The integrated circuit chip 10 may include a data receiving module 110, a data analyzing module 120, a data outputting module 130, and a data displaying module 140, wherein the data displaying module 140 is connected to the data outputting module 130. The data display module 140 may receive the target data of the data output module 130, and display the target data for the staff to check.
In this embodiment, optionally, the integrated circuit chip is a single chip. The single chip microcomputer is used as an integrated circuit chip to connect the CAN transceiver and the power supply module, and for example, the single chip microcomputer CAN be 51. The data analysis rules such as the incidence relation of the engine parameters and the simulated nitrogen and oxygen signals are stored on the single chip microcomputer, for example, the data analysis rules can be a nitrogen and oxygen signal query table and a simulated nitrogen and oxygen signal rationality table, and can be modified by workers according to requirements.
In this embodiment, optionally, the interface types of the external rack CAN interface and the external rack dc power supply interface include at least one of the following: USB, SATA, E-SATA, TF, CF, and SD. The CAN transceiver CAN be connected with external equipment through different types of interfaces such as USB and the like, so that the power module is connected with an external power supply. There may be at least two interfaces on the integrated circuit chip for connection to the CAN transceiver and the power module.
In this embodiment, optionally, a memory is integrated in the integrated circuit chip and used for storing data of the external device and a table for querying the nitrogen oxygen signal. The integrated circuit chip can be provided with a memory, and the memory can store data analysis rules such as a nitrogen-oxygen signal query table and the like, so that the corresponding nitrogen-oxygen content can be conveniently determined according to the torque and/or the rotating speed of the engine. The memory may also store external device data, such as torque and/or rotational speed of the engine, for facilitating subsequent review of the external device data by a worker.
The embodiment of the utility model provides a realized detecting the operating condition of nitrogen oxygen sensor and engine, under the condition that does not have nitrogen oxygen sensor or nitrogen oxygen sensor to damage in making external equipment, the engine can receive nitrogen oxygen sensor analogue means's simulation nitrogen oxygen signal, makes the engine can normally work, avoids because nitrogen oxygen sensor's trouble leads to the fact the influence to the engine, improves the efficiency of taking a trial run to the engine to whether current nitrogen oxygen content exceeds standard according to simulation nitrogen oxygen content determination. Under the condition that the engine does not send a heating signal, an analog heating signal is sent to the nitrogen oxygen sensor, so that the nitrogen oxygen sensor normally works, and the test run efficiency is further improved.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (7)

1. A nitrogen oxygen sensor simulation device is characterized by comprising an integrated circuit chip, an external rack CAN interface and an external rack DC power supply interface;
the integrated circuit chip is respectively connected with an external rack CAN interface and an external rack DC power supply interface, is used for carrying out data interaction with external equipment through the external rack CAN interface, and is used for acquiring the electric quantity of an external power supply through the external rack DC power supply interface;
the external rack CAN interface is respectively connected with an external device and an integrated circuit chip and is used for acquiring data sent by the external device and sending the data of the integrated circuit chip to the external device;
and the external rack direct-current power supply interface is respectively connected with an external power supply and the integrated circuit chip and used for supplying power to the integrated circuit chip.
2. The apparatus of claim 1, further comprising a CAN transceiver and a power module;
the CAN transceiver is connected between the integrated circuit chip and an external rack CAN interface and is used for converting the data formats of the external rack CAN interface and the integrated circuit chip;
the power module is connected between the integrated circuit chip and an external rack direct-current power supply interface, and is used for converting the original voltage acquired by the external rack direct-current power supply interface into a target voltage and transmitting the target voltage to the integrated circuit chip.
3. The apparatus of claim 2, wherein the integrated circuit chip comprises a data receiving module, a data analyzing module, and a data outputting module;
the data receiving module is respectively connected with the CAN transceiver and the data analysis module, and is used for receiving external equipment data acquired by the external rack CAN interface through the CAN transceiver and sending the external equipment data to the data analysis module; wherein the external equipment data comprises torque, rotating speed and heating signals of the engine and nitrogen and oxygen signals of the nitrogen and oxygen sensor;
the data analysis module is respectively connected with the data receiving module and the data output module, and is configured to: if the data receiving module receives an actual nitrogen-oxygen signal of a nitrogen-oxygen sensor, determining whether the data receiving module receives a heating signal of an engine;
and is also used for: if the data receiving module receives the heating signal, determining that the nitrogen oxygen sensor simulation device stops working;
and is also used for: if the heating signal is not received, sending an analog heating signal to the data output module;
and is also used for: if the data receiving module does not receive an actual nitrogen and oxygen signal of a nitrogen and oxygen sensor, controlling the data receiving module to obtain the torque and/or the rotating speed of the engine, determining a simulated nitrogen and oxygen signal related to the torque and/or the rotating speed according to a preset nitrogen and oxygen signal query table, and sending the simulated nitrogen and oxygen signal to the data output module;
the data output module is respectively connected with the data analysis module and the CAN transceiver and used for receiving target data analyzed by the data analysis module and sending the target data to the CAN transceiver, wherein the target data comprises a simulated heating signal and a simulated nitrogen-oxygen signal.
4. The apparatus of claim 3, wherein the integrated circuit chip further comprises a data presentation module;
and the data display module is connected with the data output module and is used for displaying the simulated nitrogen oxygen signal.
5. The apparatus of claim 1, wherein the integrated circuit chip is a single chip.
6. The apparatus of claim 1, wherein the interface types of the off-board gantry CAN interface and the off-board gantry DC power interface comprise at least one of: USB, SATA, E-SATA, TF, CF, and SD.
7. The apparatus of claim 3, wherein the integrated circuit chip has integrated therein a memory for storing peripheral data and a lookup table of nitrogen oxide signals.
CN202021956400.7U 2020-09-09 2020-09-09 Nitrogen oxygen sensor analogue means Active CN212727057U (en)

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Application Number Priority Date Filing Date Title
CN202021956400.7U CN212727057U (en) 2020-09-09 2020-09-09 Nitrogen oxygen sensor analogue means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021956400.7U CN212727057U (en) 2020-09-09 2020-09-09 Nitrogen oxygen sensor analogue means

Publications (1)

Publication Number Publication Date
CN212727057U true CN212727057U (en) 2021-03-16

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