CN212867869U - Urea pump drive detection device and system - Google Patents
Urea pump drive detection device and system Download PDFInfo
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- CN212867869U CN212867869U CN202020762481.0U CN202020762481U CN212867869U CN 212867869 U CN212867869 U CN 212867869U CN 202020762481 U CN202020762481 U CN 202020762481U CN 212867869 U CN212867869 U CN 212867869U
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a urea pump drive detection device and system. The device comprises a main control module, a driving module, a data acquisition module, a first communication module and a power supply module, wherein the driving module, the data acquisition module, the first communication module and the power supply module are connected with the main control module; the first communication module is connected with the upper computer and used for receiving the indication of the upper computer and feeding back signal data to the upper computer; the main control module is used for controlling the driving module, the data acquisition module and the power supply module to execute actions according to the instruction of the upper computer; the power supply module is connected with the main control module, the driving module, the data acquisition module and the urea pump; the driving module is connected with the urea pump through a special interface and used for driving the urea pump by adopting a driving type corresponding to the special interface; and the data acquisition module is connected with a pin interface of the urea pump and is used for acquiring signal data of the pin interface. The device need not to send drive signal drive urea pump with the help of the control unit of vehicle, can drive the detection to urea pump alone, improves detection efficiency.
Description
Technical Field
The utility model relates to a work piece diagnosis technical field especially relates to a urea pump drive detection device and system.
Background
Along with the development of economy, the use of vehicles by human beings is gradually increased, and along with the pollution of automobile exhaust is more serious, the treatment of the automobile exhaust is particularly important. At present, the automobile exhaust treatment adopts a Selective Catalytic Reduction (SCR) technology, and the main principle is that under the action of a catalyst, a reducing agent ammonia or urea solution is sprayed to reduce nitrogen oxides (NOx) in the exhaust into nitrogen (N2) and water (H2O) so as to reduce the pollution of the automobile exhaust to the environment. The urea pump is an important component of the urea solution injection metering system, and has the main functions of pumping the urea solution in the urea tank, keeping a certain pressure, and conveying the urea solution to the injection unit to meet the requirements of the injection metering system on flow and pressure.
In the running process of a vehicle, the tail gas of the vehicle needs to be continuously treated, so that the use burden of the urea pump is caused, and the fault is easy to occur. However, the urea pump which is separated from the vehicle cannot be independently driven and detected, so that not only is a proper simulated driving and detecting environment unavailable, but also faults of all parts of the urea pump are difficult to find without disassembly.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the driving test of current urea pump needs with the help of the vehicle, can't independently carry out the problem of driving test.
In order to solve the technical problem, an embodiment of the present invention provides a urea pump driving detection device, which includes a main control module, and a driving module, a data acquisition module, a first communication module and a power module, which are connected to the main control module; the first communication module is connected with an upper computer and used for receiving the indication of the upper computer and feeding back signal data to the upper computer; the main control module is used for controlling the driving module, the data acquisition module and the power supply module to execute actions according to the instruction of the upper computer; the power supply module is connected with the main control module, the driving module, the data acquisition module and the urea pump; the driving module is connected with the urea pump through the special interface and is used for driving the urea pump by adopting a driving type corresponding to the special interface; and the data acquisition module is connected with a pin interface of the urea pump and is used for acquiring signal data of the pin interface.
Preferably, the driving module is a PWM driving module, and the PWM driving module is connected to the urea pump through a first dedicated interface, and is configured to output a PWM driving signal to the urea pump to drive a motor, a nozzle, and a reversing valve of the urea pump to operate;
and the data acquisition module is connected with a pin interface of the urea pump and is used for acquiring the voltage of the pin interface.
Preferably, the drive module is a CAN drive module, and the CAN drive module is connected with the urea pump through a second special interface and is used for outputting a CAN drive signal to the urea pump to drive the urea pump to work;
and the data acquisition module is connected with a pin interface of the urea pump and is used for acquiring CAN signal data of the pin interface.
Preferably, the PWM driving module includes an H-bridge motor control unit, and is configured to drive the urea pump motor to rotate forward and backward according to the rotation speed corresponding to the PWM driving signal.
Preferably, the urea pump driving detection device further comprises an automatic fault protection module, which is connected with the data acquisition module and the main control module, and is used for performing anomaly analysis according to the signal data acquired by the data acquisition module and feeding an anomaly signal back to the main control module;
the main control module is connected with the power supply module and used for receiving the abnormal signal and controlling the power supply module to be disconnected.
The utility model discloses a urea pump drive detection device, drive module, data acquisition module, first communication module and the power module that link to each other including host system and with host system. The first communication module can receive the instruction of the upper computer and send the instruction to the main control module, so that the main control module controls the driving module to drive the urea pump to work according to the instruction of the upper computer, the data acquisition module is controlled to acquire the signal data of the pin interfaces corresponding to the components of the urea pump, the acquired signal data are fed back to the upper computer through the first communication module for data analysis, a control unit of a vehicle is not required to send a driving signal to drive the urea pump, the urea pump can be driven and detected independently, and the detection efficiency is improved.
The embodiment of the utility model provides a urea pump drive detection system, including host computer and the above-mentioned urea pump drive detection device; the upper computer comprises an upper controller, and a second communication module, a human-computer interaction module and a data analysis module which are connected with the upper controller;
the human-computer interaction module is used for receiving indication data input by a user; the second communication module is used for communicating the upper controller with the urea pump driving detection device; and the data analysis module is used for carrying out fault analysis according to the signal data fed back by the urea pump driving detection device received by the second communication module to obtain fault information.
Preferably, the signal data is a voltage of a pin interface of the urea pump; the data analysis module comprises a voltage detection unit and a data detection unit; the voltage detection unit is used for obtaining fault analysis information according to an interface connection state corresponding to the voltage of the pin interface; the data detection unit is used for judging whether the voltage analysis data corresponding to the pin interface is in a preset range or not to obtain fault analysis information.
Preferably, the signal data is CAN signal data; the data analysis module comprises a fault code analysis unit for analyzing according to the fault code in the CAN signal data.
Preferably, the urea pump driving detection system further comprises a fault prompt module and a display module; the fault prompting module is connected with the data analysis module and used for generating fault prompting information and fault processing suggestions according to the fault analysis information obtained by the data analysis module; the display module is connected with the data analysis module and the fault prompt module and is used for displaying the fault analysis information, the fault prompt information and the fault processing suggestion.
The utility model discloses a urea pump drive detecting system, through communicating host computer and urea pump drive detecting device, so that master control module among the urea pump drive detecting device can carry out the action according to each module of the instruction control of host computer, and feed back the signal data who gathers to upper controller, upper controller control data analysis module carries out the analysis according to the signal data who feeds back, thereby judge whether break down, effectively solve present needs and dismantle the urea pump, detect the problem of trouble, and can assist maintenance personal to judge the trouble, be convenient for in time maintain.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic view of a urea pump driving detection device according to an embodiment of the present invention;
fig. 2 is an environmental diagram of an embodiment of the present invention;
fig. 3 is a schematic diagram of a system for detecting actuation of a urea pump according to an embodiment of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the utility model provides a driving detection device for a urea pump, which comprises a main control module, a driving module connected with the main control module, a data acquisition module, a first communication module and a power supply module; the first communication module is connected with the upper computer and used for receiving the indication of the upper computer and feeding back signal data to the upper computer; the main control module is used for controlling the driving module, the data acquisition module and the power supply module to execute actions according to the instruction of the upper computer; the power supply module is connected with the main control module, the driving module, the data acquisition module and the urea pump; the driving module is connected with the urea pump through a special interface and used for driving the urea pump by adopting a driving type corresponding to the special interface; and the data acquisition module is connected with a pin interface of the urea pump and is used for acquiring signal data of the pin interface.
The urea pump driving detection device can be directly connected with pin interfaces of all components of the urea pump so as to drive and detect the urea pump. And the power supply module is used for supplying power to each module and the urea pump. The upper computer is used for indicating the urea pump to drive the detection device to execute actions. The special interface is a control pin interface corresponding to a driving mode and is used for being connected with pin interfaces corresponding to all components of the urea pump through a pre-designed wiring harness, and therefore data acquisition is achieved. The urea pump driving detection device can be compatible with different uremia pumps to carry out driving detection, and is high in universality.
Further, in this embodiment, the driving module may sequentially execute the following driving steps to drive the urea pump to operate, that is, to wait, build pressure, inject, stop injecting, drain, inject with small load, inject with medium load, inject with large load, test the components, and the like.
The method comprises the following steps of (1) stopping the current action of a urea pump in standby, entering a standby state, and simultaneously performing self-checking to determine whether a fault exists; the pressure build-up means that a motor of the urea pump rotates to suck urea, a nozzle is opened to exhaust air, then the urea pump is closed, so that the pressure in the pump reaches a certain degree and meets the injection condition, and the urea pump can enter the injection stop state after the pressure reaches the injection condition. The injection means that the urea pump enters an injection state, and the nozzle sprays urea solution. When the urea pump completes pressure build-up and enters a spraying stop state, a motor of the urea pump needs to be rotated to maintain the stable urea pressure. The injection stop state is also an injection waiting state, in which the injection of the urea pump is stopped, the urea pressure is maintained stable, and the injection can be performed at any time. The evacuation is to evacuate the urea pump after the urea pump performs the injection action, to discharge the urea solution in the pipeline and the urea pump, so as to prevent the urea crystal from blocking the pipeline and the nozzle to cause the fault. The small load is one of the injection states, and the injection amount is small in the small load state. The medium load is one of the injection states, and the injection amount is medium in the medium load state. The large load is one of the injection states, and the injection amount is the largest in the large load state. The component test refers to the operation of individual components of the urea pump, such as the individual rotation of a motor or the opening of a nozzle, for testing the quality of the individual components, and the operation is generally controlled within 10S so as not to damage the components.
The utility model provides a urea pump drive detection device, drive module, data acquisition module, first communication module and the power module that link to each other including host system and with host system. The first communication module can receive the indication of the upper computer and send the indication to the main control module, the main control module controls the driving module to drive the urea pump to work according to the indication of the upper computer, the data acquisition module is controlled to acquire signal data of pin interfaces corresponding to all components of the urea pump, the acquired signal data are fed back to the upper computer through the first communication module to be subjected to data analysis, a control unit of a vehicle is not required to send a driving signal to drive the urea pump, the urea pump can be driven and detected independently, and the detection efficiency is improved.
In an embodiment, as shown in fig. 1, the driving module is a PWM driving module, and the PWM driving module is connected to the urea pump through a first dedicated interface, and is configured to output a PWM driving signal to the urea pump to drive a motor, a nozzle, and an inverse valve of the urea pump to operate; and the data acquisition module is connected with a pin interface of the urea pump and is used for acquiring the voltage of the pin interface.
The first dedicated interface is a dedicated interface corresponding to a PWM (Pulse Width Modulation) driving mode, and the driving mode can be determined by connecting a pin interface of the urea pump with the first dedicated interface. It can be understood that, the pin interfaces driven by the urea pump in the PWM driving manner mainly include a motor, a nozzle, an inverter valve, and the like, and these pin interfaces are connected to a first dedicated interface (e.g., a control pin interface corresponding to the pin interfaces of the motor, the nozzle, the inverter valve, and the like) through a pre-designed wiring harness, that is, the motor, the nozzle, and the inverter valve of the urea pump can be driven to operate by sending a PWM driving signal to the pin interfaces.
The PWM driving module is used for driving a motor, a nozzle and a reversing valve of the urea pump to work in a PWM driving mode. The PWM driving mode is realized by sending PWM driving signals, namely specific frequency and duty ratio, to pin interfaces of all components of the urea pump, and the state of each component can be changed by adjusting the frequency and the duty ratio. Specifically, the PWM driving module sends a PWM driving signal to the urea pump, so that the motor, the nozzle and the reversing valve of the urea pump can be driven to work.
Specifically, it can be achieved by changing the frequency and duty ratio of the PWM drive signal for each driving step, illustratively, for standby, it can be achieved by stopping sending the PWM drive signal; for the nozzle status, opening or closing the nozzle can be achieved by sending a PWM drive signal (i.e., sending a specific frequency and duty cycle); for evacuation, PWM driving signals can be sent to the motor, the reversing valve and the pin interface corresponding to the nozzle to open the reversing valve to enable the motor to rotate reversely, urea can flow back into the urea box, and the nozzle is opened to suck air to achieve evacuation.
Further, when the driving mode of the urea pump is the PWM driving mode, the data acquisition module acquires the voltage of the connected pin interface as signal data. For example, the signal data are used to describe the urea pressure, air pressure, temperature, etc.
In an embodiment, the PWM driving module includes an H-bridge motor control unit, and is configured to drive the urea pump motor to rotate forward and backward according to a rotation speed corresponding to the PWM driving signal.
The PWM driving module can drive the motor to work according to a certain rotating speed, the rotating speed can be adjusted by adjusting the frequency and the duty ratio, and the motor can be driven to rotate forwards and backwards according to the indicated frequency and the indicated duty ratio through the H-bridge motor control unit.
In an embodiment, as shown in fig. 1, the driving module is a CAN driving module, and the CAN driving module is connected to the urea pump through a second dedicated interface and is configured to output a CAN driving signal to the urea pump to drive the urea pump to operate; and the data acquisition module is connected with a pin interface of the urea pump and is used for acquiring CAN signal data of the pin interface.
The second dedicated interface is a dedicated interface corresponding to a CAN (Controller Area Network) driving mode, and the driving mode CAN be determined by connecting a pin interface of the urea pump with the second dedicated interface. It CAN be understood that, the pin interfaces that need to be driven by the urea pump driven by the CAN driving method mainly include CANH, CANL, a power supply, an ignition signal, a ground wire, and the like, and the pin interfaces are connected to the second dedicated interface (for example, the control pin interfaces corresponding to the pin interfaces such as CANH, CANL, a power supply, an ignition signal, a ground wire, and the like) through a pre-designed wiring harness, that is, the urea pump CAN be driven to operate by sending the CAN driving signal to the pin interfaces.
The CAN driving module is a module for driving the urea pump to work in a CAN driving mode. The CAN driving mode is to transmit a CAN driving signal (that is, a CAN command) to the urea pump for communication, and adjusting the transmitted CAN command CAN enable the urea pump to perform different actions, for example, transmitting a standby, pressure build or evacuation command CAN enable the urea pump to perform a corresponding action. The communication protocol is CANEX or J1939 protocol. Specifically, the CAN driving module sends a CAN driving signal to the urea pump, so that the urea pump CAN be driven to work.
Further, when the driving mode of the urea pump is the CAN driving mode, the data acquisition module acquires CAN signal data returned by the connected pin interface to serve as signal data. For example, the signal data is used to describe the urea pump state, injection rate, urea pressure, air pressure, temperature, etc.
In this embodiment, the driving mode is determined by connecting the CAN driving module with the urea pump through the second dedicated interface, so that the CAN driving module CAN send a CAN driving signal to the urea pump to drive the urea pump to work, and the purpose of independently driving the urea pump is achieved.
In an embodiment, as shown in fig. 1, the urea pump driving detection device includes an automatic fault protection module, connected to the data acquisition module and the main control module, and configured to perform an anomaly analysis according to signal data acquired by the data acquisition module and feed an anomaly signal back to the main control module;
the main control module is connected with the power supply module and used for receiving the abnormal signal and controlling the power supply module to be disconnected.
Specifically, this urea pump drive detection device includes trouble automatic protection module, links to each other with data acquisition module and host system for carry out the abnormal analysis according to the signal data that data acquisition module gathered, when appearing unusually, to the abnormal signal of host system feedback, host system can control power module disconnection this moment, realizes the purpose of self-protection.
It can be understood that the fault automatic protection module may include two protection mechanisms, one of which is to determine whether an abnormality occurs according to the signal data acquired by the data acquisition module, that is, directly through the voltage of the pin interface; when abnormality occurs, an abnormal signal is fed back to the main control module; the other mode is that the upper computer analyzes the fed-back signal data to judge whether a fault occurs, when the fault occurs, the upper computer sends a power-off instruction to the main control module, and the main control module controls the power supply module to be disconnected according to the received power-off instruction, so that automatic protection of the urea pump is realized.
The utility model provides a urea pump drive detection system, as shown in fig. 2 and fig. 3, comprising an upper computer and a urea pump drive detection device in the above embodiment; the upper computer comprises an upper controller, a second communication module, a man-machine interaction module and a data analysis module, wherein the second communication module, the man-machine interaction module and the data analysis module are connected with the upper controller;
the human-computer interaction module is used for receiving indication data input by a user; the second communication module is used for communicating the upper controller with the urea pump driving detection device; and the data analysis module is used for carrying out fault analysis according to the signal data fed back by the urea pump driving detection device received by the second communication module to obtain fault information.
Specifically, the upper computer can input indicating data according to the human-computer interaction module, the upper controller receives the indicating data to generate indicating signals and sends the indicating signals to the urea pump driving detection device through the second communication module, so that the main control module in the urea pump driving detection device controls the driving module, the data acquisition module and the power supply module to execute actions according to the indicating signals, and the driving detection is carried out on the urea pump connected with the urea pump driving detection device. The man-machine interaction module includes, but is not limited to, being implemented by an external device such as a mouse, a button or a key, or being implemented by a touch screen, and is not limited herein.
As can be appreciated, the second communication module is connected with the first communication module of the urea pump driving detection device, namely communication can be achieved. As an example, the first communication module and the second communication module may be bluetooth communication modules at the same time.
The utility model provides a urea pump drive detecting system, through communicating host computer and urea pump drive detecting device, so that master control module among the urea pump drive detecting device can carry out the action according to each module of the instruction control of host computer, and feed back the signal data who gathers to upper controller, upper controller control data analysis module carries out the analysis according to the signal data who feeds back, thereby judge whether break down, effectively solve present needs and dismantle the urea pump, detect the problem of trouble, and can assist maintenance personal to judge the trouble, in time maintain.
In one embodiment, as shown in FIG. 3, the signal data is the voltage at the pin interface of the urea pump; the data analysis module comprises a voltage detection unit and a data detection unit; the voltage detection unit is used for obtaining fault analysis information according to the interface connection state corresponding to the voltage of the pin interface; and the data detection unit is used for judging whether the voltage analysis data corresponding to the pin interface is in a preset range or not to obtain fault analysis information.
Specifically, when the signal data is the voltage of the pin interface of the urea pump, the data analysis module performs fault analysis according to the fed back voltage of the pin interface to obtain fault analysis information. The fault analysis includes two parts, one part is a voltage detection unit, that is, according to the voltage of the pin interface, the interface connection state of the pin interface is determined, for example, when the pin interface is normally connected, the voltage of the pin interface should be in a high level state, and when the pin interface is not connected, the voltage of the pin interface should be in a low level state, so that whether a part of circuits is connected or damaged can be detected.
The other part is a data detection unit, namely, the voltage of the pin interface is analyzed through a preset analysis algorithm to obtain voltage analysis data corresponding to the pin interface, such as current urea pressure, air pressure or temperature. Whether the voltage analysis data meet the preset range or not is detected, whether faults occur or not can be judged, for example, when the urea pressure exceeds the upper limit of the preset range or is lower than the lower limit of the preset range, fault analysis information that the urea pressure is too high or a pressure sensor is damaged can be judged, therefore, abnormal positioning is achieved, maintenance personnel are assisted in analyzing fault reasons, and the detection and maintenance efficiency is effectively improved.
In one embodiment, the signal data is CAN signal data; the data analysis module comprises a fault code analysis unit for analyzing according to fault codes in the CAN signal data.
Specifically, when the signal data is the CAN signal data, the CAN signal data comprises a fault code, the fault code corresponds to fault information, a fault CAN be judged by analyzing the fault code in the CAN signal data, maintenance personnel are assisted to analyze the fault reason, and the detection and maintenance efficiency is effectively improved.
In one embodiment, as shown in fig. 3, the system for detecting the driving of the urea pump further comprises a fault prompting module and a display module which are connected with the upper controller; the fault prompting module is connected with the data analysis module and used for generating fault prompting information and fault processing suggestions according to the fault analysis information obtained by the data analysis module; and the display module is connected with the data analysis module and is used for displaying the fault analysis information, the fault prompt information and the fault processing suggestion.
Specifically, when the data analysis module judges that a fault occurs, the fault analysis information is obtained, the fault prompt module is controlled by the upper controller to generate fault prompt information and fault processing suggestions according to the fault analysis information, and the display module connected with the fault prompt module and the data analysis module is controlled to display the fault analysis information, the fault prompt information and the fault processing suggestions, so that a user can visually see relevant information of the fault and corresponding urea pump data (such as current urea pressure).
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (9)
1. A urea pump driving detection device is characterized by comprising a main control module, and a driving module, a data acquisition module, a first communication module and a power supply module which are connected with the main control module; the first communication module is connected with an upper computer and used for receiving the indication of the upper computer and feeding back signal data to the upper computer; the main control module is used for controlling the driving module, the data acquisition module and the power supply module to execute actions according to the instruction of the upper computer; the power supply module is connected with the main control module, the driving module, the data acquisition module and the urea pump; the driving module is connected with the urea pump through a special interface and is used for driving the urea pump by adopting a driving type corresponding to the special interface; and the data acquisition module is connected with a pin interface of the urea pump and is used for acquiring signal data of the pin interface.
2. The urea pump driving detection device according to claim 1, wherein the driving module is a PWM driving module, and the PWM driving module is connected to the urea pump through a first dedicated interface and configured to output a PWM driving signal to the urea pump to drive a motor, a nozzle, and an inverse valve of the urea pump to operate;
and the data acquisition module is connected with a pin interface of the urea pump and is used for acquiring the voltage of the pin interface.
3. The urea pump driving detection device according to claim 1, wherein the driving module is a CAN driving module, and the CAN driving module is connected to the urea pump through a second dedicated interface and is configured to output a CAN driving signal to the urea pump to drive the urea pump to operate;
and the data acquisition module is connected with a pin interface of the urea pump and is used for acquiring CAN signal data of the pin interface.
4. The urea pump driving detection device according to claim 2, wherein the PWM driving module includes an H-bridge motor control unit for driving the urea pump motor to rotate forward and backward according to the rotation speed corresponding to the PWM driving signal.
5. The urea pump driving detection device according to claim 1, further comprising a fail-safe module connected to the data acquisition module and the main control module, for performing an anomaly analysis according to the signal data acquired by the data acquisition module and feeding an anomaly signal back to the main control module;
the main control module is connected with the power supply module and used for receiving the abnormal signal and controlling the power supply module to be disconnected.
6. A urea pump drive detection system, characterized by comprising an upper computer, a urea pump drive detection device according to any one of claims 1 to 5; the upper computer comprises an upper controller, and a second communication module, a human-computer interaction module and a data analysis module which are connected with the upper controller;
the human-computer interaction module is used for receiving indication data input by a user; the second communication module is used for communicating the upper controller with the urea pump driving detection device; and the data analysis module is used for carrying out fault analysis according to the signal data received by the second communication module and fed back by the urea pump driving detection device to obtain fault information.
7. The urea pump actuation detection system of claim 6, wherein the signal data is a voltage at a pin interface of the urea pump; the data analysis module comprises a voltage detection unit and a data detection unit; the voltage detection unit is used for obtaining fault analysis information according to an interface connection state corresponding to the voltage of the pin interface; the data detection unit is used for judging whether the voltage analysis data corresponding to the pin interface is in a preset range or not to obtain fault analysis information.
8. The urea pump actuation detection system of claim 6, wherein the signal data is CAN signal data; the data analysis module comprises a fault code analysis unit for analyzing according to the fault code in the CAN signal data.
9. The urea pump actuation detection system of claim 6, further comprising a fault notification module and a display module; the fault prompting module is connected with the data analysis module and used for generating fault prompting information and fault processing suggestions according to the fault analysis information obtained by the data analysis module; the display module is connected with the data analysis module and the fault prompt module and is used for displaying the fault analysis information, the fault prompt information and the fault processing suggestion.
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| CN202020762481.0U CN212867869U (en) | 2020-05-09 | 2020-05-09 | Urea pump drive detection device and system |
| PCT/CN2021/081294 WO2021227647A1 (en) | 2020-05-09 | 2021-03-17 | Urea pump driving testing apparatus and system |
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| CN114215629B (en) * | 2021-12-02 | 2023-01-31 | 江铃汽车股份有限公司 | Emptying method of electronic control type urea injection system |
| CN114837784B (en) * | 2022-04-22 | 2023-08-18 | 一汽解放汽车有限公司 | Air drive system fault test method, device, computer equipment and medium |
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| DE102010030853A1 (en) * | 2010-07-02 | 2012-01-05 | Robert Bosch Gmbh | Method for controlling operations of liquid medium feed pump of urea metering device to control operations of combustion engine of motor car, involves determining characteristics of feed pump using control device |
| JP6508475B2 (en) * | 2015-10-27 | 2019-05-08 | 株式会社デンソー | Diagnostic device |
| CN106050380A (en) * | 2016-06-23 | 2016-10-26 | 俞潮军 | Diagnosis testing device for urea pump and NOx sensor in SCR system |
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