CN111894711B - Fake identification method and fake identification device for urea injection system - Google Patents

Abstract

The present application provides a counterfeit identification unit and a counterfeit identification method for identifying whether a target module or part of a urea injection system of a vehicle is an original module or part, wherein the urea injection system includes a urea supply module and a urea injection module. The counterfeit identification unit includes: a measuring device; a timer; a memory; and a controller connected in communication with the measuring device, the timer and the memory, configured to: obtain the counterfeit identification from the measuring device The real-time value of the parameter; obtain the actual duration after the target module or component is powered on from the timer; obtain the preset counterfeit identification time length and the corresponding preset value of the counterfeit identification parameter from the memory; and comparing the real-time value of the counterfeit identification parameter with the preset value when the actual time length reaches the preset counterfeit identification time length, and judging when the real-time value of the counterfeit identification parameter exceeds the preset value There is a risk that the target module or component is a non-genuine module or component.

Description

Counterfeit identification method and counterfeit identification device for urea injection system

technical field

The present application relates to the field of aftertreatment of vehicle exhaust gas, in particular to a counterfeit identification device and a counterfeit identification method for identifying a urea supply module and a urea injection module of a vehicle urea injection system.

Background technique

The urea injection system plays a significant role in improving the environmental pollution caused by vehicle exhaust emissions, so it has been widely cited in vehicles in various countries.

A vehicle's urea injection system is often used with a corresponding companion electronic control unit to function optimally. Suppliers usually provide the matching electronic control unit or strategy when delivering high-quality urea injection system components to customers. However, in some cases, due to consideration of price or other reasons, some manufacturers manufacture their own imitation parts to replace genuine parts of the urea injection system, or replace similar parts of different brands or functions with those of the genuine products. The use of the electronic control unit used in conjunction with the components reduces the performance and efficiency of the urea injection system to a certain extent, or it cannot be used normally at all, and even leads to accidents. It not only damages the reputation of genuine product manufacturers, but also infringes the right to know and related intellectual property rights of genuine product manufacturers.

It is hoped that the above problems can be solved.

Contents of the invention

The object of the present invention is to provide a counterfeit identification device and a counterfeit identification method for identifying the authenticity of a target module or part of a urea injection system.

In this application, the term "target module or component" refers to the smallest unit in the urea injection system that may be replaced separately, which may be an integral module or component assembled from multiple parts that constitute the urea injection system, It may also be a single component constituting the urea injection system.

To this end, according to one aspect of the present application, a counterfeit identification unit for identifying whether a target module or component of a urea injection system of a vehicle is an original module or component is provided, wherein the urea injection system includes a urea supply module and a urea Injection module, the counterfeit identification unit includes:

A measuring device, used to measure the real-time value of the counterfeiting parameter of the target module or component;

a timer, used for timing the duration of the activation of the target module or component;

a memory for storing a preset counterfeit identification time period for the target module or component and preset values of counterfeit identification parameters corresponding to the preset counterfeit identification time period; and

A controller connected in communication with the measurement device, the timer and the memory, the controller is configured to: obtain the real-time value of the counterfeit discrimination parameter from the measurement device; obtain the real-time value of the counterfeit parameter from the timer The actual time duration after the target module or component is powered on; obtaining the preset counterfeit discrimination time period and the corresponding preset value of the counterfeit discrimination parameter from the memory; The real-time value of the counterfeit identification parameter is compared with the preset value during the counterfeit identification time, and when the real-time value of the counterfeit identification parameter exceeds the preset value, it is judged that the target module or component is a non-original module or component risk.

When the target module or component is a urea supply module, the counterfeit identification parameter is the real-time temperature of the heater of the urea supply module, preferably, the preset identification period is 200 seconds, 500 seconds or 900 seconds, and the The default value of the discrimination pseudo parameter is -37 degrees, -36 degrees or -30 degrees. When the target module or component is a urea injection module, the counterfeit identification parameter is the resistance of the winding coil of the electromagnetic injection valve of the urea injection module. Preferably, the preset identification period is 5 minutes.

In one embodiment, the counterfeit identification unit further includes an alarm communicated with the controller, and the controller is configured to trigger the alarm when the real-time value of the counterfeit identification parameter exceeds a preset value, preferably , the alarm is a display alarm and/or an audible alarm. The counterfeit identification unit of the present application can be provided separately, or can be integrated in the engine electronic control unit of the vehicle.

According to another aspect of the present application, a counterfeiting method for identifying whether a target module or part of a urea injection system of a vehicle is an original module or part is provided, wherein the urea injection system includes a urea supply module and a urea injection module , the method includes:

powering on said target module or component;

Real-time measurement of the real-time value of the counterfeit discrimination parameter of the target module or component;

Timing the actual time duration after the target module or component is powered on;

comparing the real-time value of the counterfeit identification parameter with the preset value when the actual time length reaches the preset counterfeit identification time length for the target module or component, and when the real-time value of the counterfeit identification parameter exceeds the preset value, it is determined that the target module or component has a risk of being a non-original module or component.

In one embodiment, the counterfeit identification method further includes the step of triggering an alarm when the real-time value of the counterfeit identification parameter exceeds a preset value, preferably, the alarm is a display alarm and/or an audio alarm. The counterfeiting method can be executed during the self-check process when the vehicle is started, or executed in response to the actual needs of customers.

Using the counterfeit identification method and counterfeit identification unit of the present application, customers can regularly or irregularly perform identification of important modules or components of the urea injection system every time the vehicle is started, and under any circumstances deemed necessary by the customer , to detect unauthorized replacement of important modules or components in a timely manner. This is not only beneficial to ensure the normal and efficient work or operation of important modules or components, other components or modules associated with it, and even the entire urea injection system, but also ensure their normal service life, thereby reducing vehicle exhaust to the greatest extent. pollution of the environment.

Description of drawings

Those skilled in the art can more thoroughly understand the above and other features and advantages of the present application after reading the detailed description of the embodiments of the present application given with reference to the accompanying drawings. The drawings are for illustrative and schematic purposes only, and are not intended to limit the scope of protection of the present application. in:

Fig. 1 shows the change curve of the temperature of the original urea supply module used for the vehicle urea injection system and the heater of the non-original urea supply module after power-on;

Fig. 2 is a simplified flow chart of the method for discriminating counterfeit according to the present application; and

Fig. 3 is a simplified block diagram of a counterfeit identification unit according to the present application.

Detailed ways

As mentioned above, the counterfeit identification device and the counterfeit identification method provided in the present application are intended to be used to identify the authenticity of the target module or component in the urea injection system. This identification method can be set as a part of the self-check when the vehicle is started, and can also respond to the actual needs of users to identify whether the target module or part of the urea injection system in the vehicle is an original module or part.

According to the principles of the present application, the counterfeit identification method and the counterfeit identification unit of the present application are based on at least one operating parameter of the target (to be identified) module or component of the urea injection system, and pre-set and store the original package for the target module or component. The preset counterfeit discrimination period of the module or component and the preset value of the operation parameter corresponding to the preset counterfeit discrimination period. The target module or component is then powered on or activated while timing the duration of the power on or activation and measuring the real-time value of the operating parameter. When the actual duration of power-on or activation obtained by timing reaches the preset identification time, compare the real-time value of the operating parameter with the preset value, and if the real-time value exceeds the preset value, then judge the target module or component If there is a risk of non-original modules or components, remind the staff to check or check in time, and make judgments in conjunction with other conditions if necessary; otherwise, determine that the target module or component is an original module or component.

Typically, the urea injection system mainly includes a urea supply module, a urea injection module and other components such as pipelines. The urea supply module is configured to draw the urea solution in the urea storage tank, heat and pressurize the drawn urea solution, and then deliver the urea solution with a specific pressure and temperature to the urea injection module. The urea injection module is configured to inject the urea solution from the urea supply module into the exhaust gas in the vehicle exhaust pipe at a specific pressure and/or rate. Afterwards, the urea reacts chemically with the nitrogen oxides in the vehicle exhaust to generate nitrogen and water that are not polluting to the environment, so as to purify the vehicle exhaust. This application will take the urea supply module and the urea injection module as examples to describe the counterfeit identification method and the counterfeit identification unit of the present application in detail.

The urea supply module includes a heater for heating the urea solution drawn from the urea storage. The curves L1 and L2 shown in FIG. 1 respectively represent the temperature variation with time of the heater itself of the original urea supply module and the non-original urea supply module. It can be seen from Figure 1 that for the heater of the original urea supply module, its temperature rises slowly from about -40 to about -30 degrees in about 1000 seconds of heating time, while for the non-original urea supply module For the heater, in the heating time of about 1000 seconds, the temperature rises relatively quickly from about -40 to about -10 degrees, and the temperature change is large, especially in the first about 200 seconds, the temperature rise rate is relatively large, The temperature rose rapidly to about -25 degrees.

Based on the research curve in Figure 1, the temperature of the heater itself when it is energized can be used as an operating parameter in the counterfeit identification method of the urea supply module, and is measured during the execution of the method.

As shown in Figure 2, the counterfeiting method for the urea supply module includes: the step S1 of energizing the heater of the urea supply module to start heating the urea solution in the urea supply module; The step S2 of real-time measurement of the temperature of the heater; the step S3 of starting timing and recording the power-on duration of the heater when the heater starts to heat; Step S4 of comparing the real-time temperature with the corresponding preset temperature. In the comparison step of step S4, when the real-time temperature exceeds the preset temperature, it is judged that the current urea supply module has the risk of being a non-original urea supply module, and when the real-time temperature does not exceed the preset temperature , confirm that the current urea supply module is the original urea supply module. Wherein steps S1, S2 and S3 are performed simultaneously.

In other partial embodiments, the above-mentioned S1, S2, and S3 may not be performed at the same time, for example, restarting the S2 step at a fixed time interval after the S1 step starts, and/or restarting the S3 step at a fixed time interval after the S2 step starts.

In some other embodiments, the counterfeiting method further includes a step S5 of triggering an alarm when the real-time temperature exceeds the preset temperature. The alarm may be a display alarm and/or an audible alarm, or may be any other known form of alarm.

In other partial embodiments, the counterfeiting method further includes the step of presetting and storing the preset counterfeiting time period of the original module used for the target module and the temperature preset value corresponding to the preset counterfeiting time period , this step can be performed before the S1 step.

Correspondingly, as shown in Figure 3, the identification unit of the present application includes: the temperature sensor 10 that is used to measure the real-time temperature of the heater self of urea supply module, and this temperature sensor can be any type of temperature known in the art Sensor; A timer 20 used to time the energization duration of the heater, which can be any type of timer known in the art; used to store the above-mentioned preset discrimination period for the original urea supply module and a memory 30 for the preset temperature; and a controller 40 for communicating with the temperature sensor, the timer and the memory. The controller is configured to obtain the real-time temperature of the heater of the urea supply module from the temperature sensor 10; obtain the duration of power-on of the heater from the timer 20; obtain the above-mentioned preset discrimination time and the above-mentioned preset temperature from the memory 20 When the duration obtained from the timer 20 reaches the preset discrimination duration, the real-time temperature obtained from the temperature sensor 10 is compared with the preset temperature, and when the real-time temperature exceeds the preset temperature, it is judged that the current urea The supply module has the risk of non-original urea supply module, otherwise, it is determined that the current urea supply module is the original urea supply module.

According to the curve in FIG. 1 , it can be seen that the preset identification time for the urea supply module may be less than 1000 seconds, for example, it may be 100 seconds, 200 seconds, 300 seconds, 400 seconds...1000 seconds. For example, when the preset counterfeiting time is 200 seconds, the corresponding predetermined temperature can be -37 degrees; when the preset counterfeiting time is 500 seconds, the corresponding predetermined temperature can be -36 degrees; when the preset counterfeiting time is When it is 900 seconds, the corresponding predetermined temperature may be -30 degrees.

In other partial embodiments, the counterfeit identification unit of the present application includes an alarm 50, which may be an audible alarm and/or a display alarm, or any other type of alarm. The controller may be configured to communicate with the alarm, and trigger the alarm when the real-time temperature exceeds the preset temperature.

As mentioned above, the identification process of the urea supply module of the urea injection system of the vehicle can be carried out based on the real-time temperature of the heater itself when it is powered on. Correspondingly, the identification unit of the present application includes a real-time parameter for measuring the operating parameter Value sensor 10. However, those skilled in the art should understand that the operating parameters used to perform the counterfeiting function of the urea supply module can be any parameter that can distinguish the original urea supply module from the non-original urea supply module except the real-time temperature of the heater. Other parameters, operating parameters used in the counterfeit identification process are not particularly limited herein.

Those skilled in the art should also understand that for different target modules or components, different operating parameters can be used to perform counterfeit identification using a method similar to the above-mentioned counterfeit identification method. For example, for the urea injection module of the above-mentioned urea injection system, the resistance of the winding coil of the electromagnetic injection valve of the urea injection module can be used as a counterfeit identification parameter.

Thus, the counterfeiting method for the urea injection module includes: the step of energizing the winding coil of the electromagnetic injection valve of the urea injection module; the step of measuring the resistance of the winding coil in real time while energizing the winding coil; At the same time, the step of timing the continuous energization time of the winding coil; the step of comparing the measured real-time resistance with the corresponding preset resistance when the actual energization time obtained by timing reaches the preset counterfeiting time for the urea injection module. In this comparison step, when the real-time resistance exceeds the preset resistance, it is judged that the current urea injection module has the risk of being a non-original urea injection module, and when the real-time resistance does not exceed the preset resistance, it is determined that The current urea injection module is the original urea injection module.

In other partial embodiments, the preset identification time for the urea injection module may be 5 minutes.

Corresponding to this method, the counterfeit identification unit for the urea injection module may include a resistor instead of the temperature sensor as described above for the urea supply module, and other components of the counterfeit identification unit are the same as the identification unit for the urea supply module. The pseudo-units are basically the same and will not be repeated here.

The counterfeit identification method and the counterfeit identification unit of the present application are described in detail by taking the urea supply module and the urea injection module of the urea injection system as examples above. It should be understood that the target modules applicable to the counterfeit identification method and the counterfeit identification unit of the present application are not limited to The urea injection module and the urea supply module listed above may include any other components or modules except these two; the operating parameters applicable to the counterfeit identification method and the counterfeit identification unit of the present application are not limited to the above listed temperature or resistance, but may include any parameter or combination of parameters capable of distinguishing an original module or part from a non-genuine module or part.

The counterfeit identification unit according to the present application can be a unit provided separately for this purpose, and can also be integrated into the engine electronic control unit of the vehicle. The measuring sensor (eg temperature or resistance sensor), memory, timer and other constituent components included in the forgery identification unit may be separately provided for this purpose, or may be shared with other functional systems of the vehicle.

By using the counterfeit identification method and counterfeit identification unit of the present application, the customer can regularly perform the important modules of the urea injection system or Identification of counterfeit components, timely detection of unauthorized replacement of important modules or components. For this important module or component, other components or modules associated with it, and even the entire urea injection system, it can not only ensure normal and efficient work or operation, but also ensure their normal service life, and reduce the vehicle load to the greatest extent. Exhaust pollution to the environment.

The application is shown and described on the basis of particularly preferred embodiments without being limited to the details shown and described. On the contrary, various modifications or variations may be made without departing from the spirit and scope defined by the appended claims.

Claims (12)

1. A verification unit for distinguishing whether a target module or component of a urea injection system of a vehicle is an original module or component, wherein the urea injection system comprises a urea supply module and a urea injection module, the verification unit comprising:

measuring means for measuring a real-time value of a spurious parameter of the target module or component;

the timer is used for timing the duration of time which is sustained after the target module or the component is activated;

the memory is used for storing preset fake distinguishing duration for the target module or the component and preset values of fake distinguishing parameters corresponding to the preset fake distinguishing duration; and

a controller in communication with the measurement device, the timer, and the memory, the controller configured to: acquiring a real-time value of the pseudo-distinguishing parameter from the measuring device; acquiring the actual duration of the target module or component after the target module or component is electrified from the timer; acquiring the preset distinguishing duration and the corresponding preset value of the distinguishing parameter from the memory; and comparing the real-time value of the fake-distinguishing parameter with the preset value when the actual time length reaches the preset fake-distinguishing time length, and judging that the target module or component is at risk of being a non-original module or component when the real-time value of the fake-distinguishing parameter exceeds the preset value.

2. The discrimination unit of claim 1, wherein the target module or component is a urea supply module and the discrimination parameter is a real-time temperature of a heater of the urea supply module; or the target module or component is a urea injection module and the spurious-identifying parameter is the resistance of a winding coil of an electromagnetic injection valve of the urea injection module.

3. The discrimination unit of claim 1, wherein the target module or component is a urea supply module, the preset discrimination duration is 200 seconds, 500 seconds, or 900 seconds, and the preset value of the discrimination parameter is-37 degrees, -36 degrees, or-30 degrees; or the target module or component is a urea injection module, and the preset pseudo-distinguishing duration is 5 minutes.

4. A pseudo-discrimination unit according to any one of claims 1 to 3, further comprising an alarm communicatively connected to the controller, the controller being configured to trigger the alarm when the real-time value of the pseudo-discrimination parameter exceeds a preset value.

5. The discrimination unit of claim 4, wherein the alarm is a display alarm and/or an audible alarm.

6. A false-proof unit according to any one of claims 1-3, wherein the false-proof unit is integrated within an engine electronic control unit of a vehicle.

7. A method for discriminating whether a target module or component of a urea injection system of a vehicle is an original module or component, wherein the urea injection system comprises a urea supply module and a urea injection module, the method comprising:

energizing the target module or component;

measuring real-time values of the spurious parameters of the target module or component in real time;

the actual duration which is sustained after the target module or the component is electrified is counted;

and when the actual time length reaches the preset fake distinguishing time length for the target module or component, comparing the actual value of the fake distinguishing parameter with a preset value, and when the real-time value of the fake distinguishing parameter exceeds the preset value, judging that the target module or component is at risk of being a non-original module or component.

8. The method of claim 7, wherein the target module or component is a urea supply module and the spurious parameter is a real-time temperature of a heater of the urea supply module; or the target module or component is a urea injection module and the spurious-identifying parameter is the resistance of a winding coil of an electromagnetic injection valve of the urea injection module.

9. The method of claim 8, wherein the target module or component is a urea supply module, the preset time period of discrimination is 200 seconds, 500 seconds or 900 seconds, and the preset value of the discrimination parameter is-37, -36 or-30 degrees; or the target module or component is a urea injection module, and the preset pseudo-distinguishing duration is 5 minutes.

10. A method of discriminating as defined in claim 8 or 9, further comprising the step of triggering an alarm when the real time value of the discriminating parameter exceeds a preset value.

11. The method of claim 10, wherein the alarm is a display alarm and/or an audible alarm.

12. The discrimination method of claim 8 or 9, wherein the discrimination method is performed during a self-test performed at vehicle start-up or in response to a customer's actual need.

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