Driving system load test method and device for turbocharger calibration

Abstract

The invention relates to the technical field of automobile part testing, and particularly discloses a driving system load test method and device for turbocharger calibration, and the method comprises the steps: building a test platform which comprises an engine, a turbocharger, an electronic actuator and a UADbox controller, and obtaining a test result through obtaining pull rod tension empirical data; presetting a target tension threshold value according to the empirical data; acquiring an engine rotating speed limit value, and setting a plurality of steady-state rotating speed values based on the rotating speed limit value; the load and the rotating speed of the engine are adjusted, the rotating speed is adjusted to a steady-state rotating speed value, the opening degree of the electronic actuator is adjusted to a second opening degree value from a first opening degree value within first preset time, and a test data set of the pull rod tension is obtained; and judging whether the tension is smaller than a target tension threshold value or not according to the test data set, if so, outputting the test data set and the opening degree of the electronic actuator, thereby realizing the method for automatically, accurately and efficiently testing the load on the actuator driving system, and accurately evaluating the risk of failure of the actuator driving system caused by the load.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile component testing, and in particular to a drive system load testing method and device for turbocharger calibration. Background Art

[0002] The turbocharger is a key component of the automobile engine. The loads generated by various engine operating conditions and turbocharger vibrations will act on the turbocharger actuator drive system. There is a risk of failure of the turbocharger actuator drive system due to excessive load, which in turn affects the performance and reliability of the engine.

[0003] In order to effectively deal with the problem of excessive load, during the development of the turbocharger, it is necessary to measure its maximum load, evaluate whether the turbocharger rod tension meets the design requirements under a certain actuator opening, and use it for turbocharger calibration protection. However, in the relevant technology, there is currently no accurate and efficient method to test the load on the actuator drive system, and it is impossible to accurately evaluate the risk of load-induced failure of the turbocharger actuator drive system. Summary of the invention

[0004] The present invention aims to solve the problem in the prior art that, during the development of a turbocharger, there is currently no method for accurately and efficiently testing the load on an actuator drive system, and the risk of failure of the turbocharger actuator drive system due to the load cannot be accurately assessed. Therefore, the present invention proposes a drive system load testing method and device for turbocharger calibration.

[0005] In a first aspect, the present application provides a drive system load test method for turbocharger calibration, comprising: Building a test platform, the test platform comprising an engine mounted on a test bench, a turbocharger, an electronic actuator for controlling the opening of the turbocharger, and a UADbox controller electrically connected to the electronic actuator; Acquiring empirical data of the pull rod tension of the turbocharger, and presetting a target tension threshold value according to the empirical data; Acquire the engine speed limit value, and set a plurality of steady-state speed values ​​from low to high intervals based on the speed limit value; Adjusting the load and speed of the engine, wherein the speed is adjusted to the corresponding steady-state speed value, and adjusting the opening of the electronic actuator from the first opening value to the second opening value within a first preset time to obtain a test data set of the pull rod tension; According to the test data set, it is determined whether it is less than the target tension threshold, and if so, the test data set and the corresponding opening of the electronic actuator are output.

[0006] According to some embodiments of the present application, the test platform is constructed, the test platform includes an engine mounted on a test bench, a turbocharger, an electronic actuator for controlling the opening of the turbocharger, and a UADbox controller electrically connected to the electronic actuator, and further includes: A tension sensor for measuring the tension of the turbocharger pull rod, wherein the tension sensor is electrically connected to an HBM testing system.

[0007] According to some embodiments of the present application, the tension sensor is a resistive strain type tension sensor, and the HBM testing system is configured to preset a target tension threshold of the tension of the pull rod.

[0008] According to some embodiments of the present application, the adjusting the load and speed of the engine, wherein the speed is adjusted to the corresponding steady-state speed value, and the opening of the electronic actuator is adjusted from the first opening value to the second opening value within a first preset time to obtain a test data set of the pull rod tension, includes: Static adjustment is performed on the load and speed of the engine, and the opening of the electronic actuator is adjusted from a first opening value to a second opening value within a first preset time, so as to obtain first sub-data of the tension of the pull rod under steady-state conditions; The load and speed of the engine are dynamically adjusted, and the opening of the electronic actuator is adjusted from a first opening value to a second opening value within a first preset time, so as to obtain second sub-data of the tension of the pull rod under transient working conditions.

[0009] According to some embodiments of the present application, the static adjustment of the load and speed of the engine, and the adjustment of the opening of the electronic actuator from a first opening value to a second opening value within a first preset time, to obtain the first sub-data of the tension of the pull rod under a steady-state condition, include: The steady-state operating condition test adjusts the engine load to full load, adjusts the engine speed to each corresponding steady-state speed value in turn, and adjusts the opening of the electronic actuator from the first opening value to the second opening value within a first preset time to obtain the first sub-data of the pull rod tension corresponding to each steady-state speed value under steady-state conditions.

[0010] According to some embodiments of the present application, dynamically adjusting the load and speed of the engine, and adjusting the opening of the electronic actuator from a first opening value to a second opening value within a first preset time to obtain the second sub-data of the pull rod tension under transient working conditions, further includes: The transient operating condition test adjusts the opening of the electronic actuator from the first opening value to the second opening value within the first preset time, adjusts the engine load from the first load value to the full load within the second preset time, and adjusts the engine speed from adjacent steady-state speed values ​​in turn within the third preset time to obtain the second sub-data of the pull rod tension corresponding to each adjacent steady-state speed value change process under the transient operating condition.

[0011] According to some embodiments of the present application, judging whether the test data set is less than the target tension threshold, and if so, outputting the test data set and the corresponding opening of the electronic actuator includes: If the test data set is greater than the target tension threshold, the second opening value of the electronic actuator is reduced, and the pull rod tension of the turbocharger corresponding to different engine states is measured again.

[0012] According to some embodiments of the present application, if the test data set is greater than the target tension threshold, reducing the second opening value of the electronic actuator, and measuring again the pull rod tension of the turbocharger corresponding to different engine states, includes: If the test data set is greater than the target tension threshold, reducing the second opening value of the electronic actuator; The load and speed of the engine are adjusted again statically and dynamically to obtain the pull rod tension of the turbocharger under steady-state working conditions and transient working conditions.

[0013] Compared with the prior art, the above technical solution provided by the present application has at least the following beneficial effects or advantages: 1) A new drive system load test method for turbocharger calibration is proposed. The method is implemented through a built test platform, which includes a UADbox controller, an electronic actuator, an HBM test system, a tension sensor, an improved pull rod structure, an engine and a turbocharger. It can automatically measure the pull rod tension corresponding to the engine load under steady-state conditions and transient conditions and the engine speed under any combination of steady-state conditions and transient conditions, so as to evaluate whether the turbocharger pull rod tension meets the design requirements under a certain actuator opening under various different conditions, so as to be used for turbocharger calibration protection, realize a method for accurately and efficiently testing the load on the actuator drive system, and accurately evaluate the risk of load-induced failure of the turbocharger actuator drive system.

[0014] 2) This test method improves the original pull rod structure by combining a sensor. The sensor is connected to the HBM test system for communication, which enables direct and accurate measurement of the turbocharger pull rod tension. By setting the electronic actuator opening in the UADbox controller, the maximum opening allowed by the electronic actuator under different engine speeds and loads can be effectively measured. The operation is simple and does not require complex calculations and models. At the same time, the tension data can be obtained in real time, making it easy to understand the working status of the engine and supercharger in a timely manner.

[0015] In a second aspect, the present application provides a drive system load testing device for turbocharger calibration, wherein the testing platform is applied to the testing method as described in the first aspect above, and comprises a truncated pull rod and a tension sensor coaxially arranged with the truncated pull rod.

[0016] According to some embodiments of the present application, the tension sensor has a first surface and a second surface that are relatively parallel; The truncation tie rod comprises: a first rod, one end of which is fixedly connected to the first surface; a second rod, the second rod being fixedly connected to the second surface; The first rod, the tension sensor and the second rod are coaxially arranged.

[0017] The beneficial effects of the technical solution provided in the second aspect of the present application refer to the beneficial effects of the technical solution provided in the first aspect above, and will not be repeated here.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a flow chart of a drive system load test method for turbocharger calibration according to an embodiment of the present application; Figure 2 is a structural schematic diagram of a drive system load test device for turbocharger calibration according to an embodiment of the present application; Figure 3 A bar graph of data after testing according to the testing method of an embodiment of the present application; Figure 4A structural diagram of a load testing device according to an embodiment of the present application; Figure 5 A schematic structural diagram of a truncated pull rod according to an embodiment of the present application; Figure 6 A cross-sectional view of a truncated tie rod according to an embodiment of the present application.

[0021] Reference numerals 100, electronic actuator; 200, truncated pull rod; 210, first rod; 211, first connecting portion; 212, first through hole; 220, second rod; 221, second connecting portion; 222, second through hole; 230, tension transmission stud; 300, tension sensor; 400, turbocharger; 500, HBM test system; 600, UADbox controller; 700, air filter; 800, intercooler; 900, engine; DETAILED DESCRIPTION The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0023] The terms "first", "second", "third", etc. are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. For example, the first end plate and the second end plate are only used to distinguish different end plates, and their order is not limited. The first end plate can also be named as the second end plate, and the second end plate can also be named as the first end plate without departing from the scope of the various described embodiments. And the terms "first", "second", "third", etc. do not limit the indicated features to be different.

[0024] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "connected", "connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The meaning of "plurality" is at least two, that is, two or more.

[0025] It should be noted that, in the present application, words such as "in one embodiment", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in the present application as "in one embodiment", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in one embodiment", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] For the turbocharger, a key component of the automobile engine, during the development process, it is often necessary to measure the maximum opening of the actuator, as well as the engine speed and load under different working conditions to see whether the pull rod tension of the turbocharger meets the requirements. The inventor found that the traditional measurement method is complicated and cannot accurately and efficiently test the load on the actuator drive system, resulting in an inability to accurately assess the risk of load-induced failure of the turbocharger actuator drive system. Based on this, the inventor proposed a high-precision and high-efficiency test method for testing the pull rod tension.

[0027] The test method is implemented through a constructed test platform, which includes a UADbox controller, an electronic actuator, an HBM test system, a tension sensor, an improved pull rod structure, an engine and a turbocharger. The test platform can automatically measure the pull rod tension corresponding to the engine load under steady-state conditions and transient conditions and the engine speed under any combination of steady-state conditions and transient conditions, so as to evaluate whether the turbocharger pull rod tension meets the design requirements under a certain actuator opening under various different conditions, and is used for turbocharger calibration protection, so as to realize a method for accurately and efficiently testing the load on the actuator drive system, and accurately evaluate the risk of load-induced failure of the turbocharger actuator drive system.

[0028] The following will further describe the drive system load testing method and device for turbocharger calibration through multiple embodiments.

[0029] See also Figures 1 to 4 This embodiment provides a drive system load test method for turbocharger calibration, which specifically includes the following steps: Step S100: constructing a test platform, the test platform comprising an engine mounted on a test bench, a turbocharger, an electronic actuator for controlling the opening of the turbocharger, and a UADbox controller electrically connected to the electronic actuator; In this step, see Figure 2 It can be understood that the implementation of the test method requires the construction of a corresponding test platform, which realizes an integrated full-process test. The test platform includes original automobile components, such as a turbocharger 400, an air filter 700 connected to the turbocharger 400 through a pipeline, an intercooler 800 connected to the turbocharger 400 through a pipeline, and an engine 900 connected to the other end of the intercooler 800 through a pipeline; the engine 900 forms a connection loop with the turbocharger 400 through a pipeline, a tension sensor 300 is arranged on the pull rod of the turbocharger, and the tension sensor 300 is a resistance strain type tension sensor. The tension sensor 300 is electrically connected to the HBM test system 500, and the electronic actuator 100 of the turbocharger is electrically connected to the UADbox controller 600.

[0030] It should be noted that the tension sensor 300, HBM test system 500 and UADbox controller 600 can be obtained from the market, and their structures and functional implementation principles are not elaborated here. In addition, the test platform can be understood as a test bench (or test bench), which is actually a device built for performance testing and experiments of mechanical, electronic, automotive and other systems. It consists of a sturdy bench and various measuring and control devices, which are used to simulate and evaluate various working conditions and load conditions of the tested system.

[0031] Step S200: Acquire empirical data of the pull rod tension of the turbocharger, and preset a target tension threshold value according to the empirical data; In this step, after the test platform is built, it is necessary to obtain the empirical data of the pull rod tension of the turbocharger. It can be understood that the empirical data of the pull rod tension can be obtained based on previous historical data. Of course, corresponding empirical data of the pull rod tension needs to be collected correspondingly for different vehicle models. After the empirical data of the pull rod tension is obtained, the preset target tension threshold value in the experiment process is further determined. The target tension threshold value can be 200N, 220N, 240N or 260N. The specific value is selected according to actual needs and is not limited here.

[0032] It should be noted that the target tension threshold obtained is mainly used to judge the measured pull rod tension during the experiment. When the measured pull rod tension is greater than the target tension threshold, it means that the maximum opening of the actuator is set too high, so it is necessary to further reduce the maximum opening of the actuator. Experiments are conducted here.

[0033] Step S300: acquiring the engine speed limit value, and setting a plurality of steady-state speed values ​​from low to high intervals based on the speed limit value; In this step, for the engine speed limit value, since each engine has been calibrated with its maximum speed, power and other limit values ​​during production, its engine speed limit value can be directly obtained. During the test process, since it is necessary to consider the engine's stable working conditions and transient working conditions, it is necessary to set multiple steady-state speed values ​​during the experiment. The steady-state speed value can be selected and set in an arithmetic progression from low to high intervals, or it can be selected and set in a non-arithmetic progression.

[0034] In some embodiments, see Figure 3 , the steady-state speed value of the engine speed can be 1250r.min -1 、2000r.min -1 、2800r.min -1 ......Of course, the specific steady-state speed value needs to be selected according to actual needs and is not limited here.

[0035] Step S400: adjusting the load and speed of the engine, wherein the speed is adjusted to the corresponding steady-state speed value, and adjusting the opening of the electronic actuator from the first opening value to the second opening value within a first preset time to obtain a test data set of the pull rod tension; In the step, after the target tension threshold value and the steady-state speed value of the engine are obtained, the load and speed of the engine are statically adjusted, and the opening of the electronic actuator is adjusted from the first opening value to the second opening value within the first preset time, so as to obtain the first sub-data of the tension of the pull rod under steady-state conditions, and the load and speed of the engine are dynamically adjusted, and the opening of the electronic actuator is adjusted from the first opening value to the second opening value within the first preset time, so as to obtain the second sub-data of the tension of the pull rod under transient conditions.

[0036] Optionally, in a steady-state operating condition test, the engine load is adjusted to full load, the engine speed is adjusted to each corresponding steady-state speed value in turn, and the opening of the electronic actuator is adjusted from the first opening value to the second opening value within a first preset time, so as to obtain the first sub-data of the pull rod tension corresponding to each steady-state speed value under steady-state operating conditions.

[0037] Optionally, in a transient operating condition test, the electronic actuator opening is adjusted from a first opening value to a second opening value within a first preset time, the engine load is adjusted from a first load value to a full load within a second preset time, and the engine speed is incrementally adjusted from adjacent steady-state speed values ​​within a third preset time, so as to obtain second sub-data of the pull rod tension corresponding to each adjacent change process of the steady-state speed values ​​under transient operating conditions.

[0038] It can be understood that the first preset time can be 0.4s, 0.5s or 0.6s, and the specific time interval can be selected according to actual needs. The second preset time can be 1s, 1.1s or 1.2s, and the specific time interval can be selected according to actual needs. The third preset time can be 8s, 9s or 10s, and the specific time interval can be selected according to actual needs. The first opening value is generally the minimum opening, which can be 4%, 5%, or 6%, and the second opening value is generally the minimum high opening, which can be 90%, 95%, or 96%. The specific time interval can be selected and set according to actual requirements, and is not limited here.

[0039] In one example, specifically, before the test begins, the engine needs to be warmed up first. Taking the target tension threshold value as 210 as an example, after warming up, the target tension threshold value of the pull rod tension is set in the HBM test system, the engine load steady-state condition is set to 100% through the test bench, and the transient condition is increased from 50% to 100% within 1 second. Then, the electronic actuator opening is set in the UADbox controller to increase from the first opening value 5% to the second opening value 95% within the first preset time of 0.5 seconds. The engine speed is set through the test bench, where the steady-state conditions are 1250r / min, 2000r / min, 2800r / min, and 3600r / min respectively; the transient condition is increased from 1250r / min to 2000r / min, 2000r / min to 2800r / min, and 2800r / min to 3600r / min within the third preset time of 10 seconds.

[0040] It can be understood that the engine speed corresponding to the above-mentioned steady-state engine load condition also needs to be in the steady-state condition, and then the electronic actuator opening is adjusted from the first opening value to the second opening value within the first preset time, and the engine speed corresponding to the above-mentioned transient engine load condition also needs to be in the transient condition, and then the electronic actuator opening is adjusted from the first opening value to the second opening value within the first preset time to complete the measurement of each set of data.

[0041] It should also be noted that during the test, the tension of the pull rod at the resistance strain type tension sensor was tested in real time by the HBM test system. The measurement data in the above example can be found in Tables 1 and 2 as well as Figure 3 From the bar graph shown, it can be seen that the tension is less than the target tension threshold in various test conditions.

[0042] Table 1 Steady-state test data Table 2 Transient condition test data Step S500: judging whether the test data set is less than the target tension threshold according to the test data set, and if so, outputting the test data set and the corresponding opening of the electronic actuator.

[0043] In this step, as shown in Table 1 and Table 2 in the above step S400, each measured pull rod tension needs to be judged against the target tension threshold value. If the test data set is greater than the target tension threshold value, the second opening value of the electronic actuator is reduced, and the pull rod tension of the turbocharger corresponding to different engine states is measured again. If the test data set is greater than the target tension threshold value, the second opening value of the electronic actuator is reduced; and the load and speed of the engine are statically and dynamically adjusted again to obtain the pull rod tension of the turbocharger under steady-state and transient conditions.

[0044] The drive system load test method for turbocharger calibration proposed in the above method steps is implemented by a constructed test platform, wherein the test platform includes a UADbox controller, an electronic actuator, an HBM test system, a tension sensor, an improved pull rod structure, an engine and a turbocharger, and can realize automatic measurement of the pull rod tension corresponding to the engine load under steady-state conditions and transient conditions and the engine speed under any combination of steady-state conditions and transient conditions, so as to evaluate whether the turbocharger pull rod tension meets the design requirements under a certain actuator opening under various different conditions, and a method for accurately and efficiently testing the load on the actuator drive system for turbocharger calibration protection, and accurately evaluate the risk of load-induced failure of the turbocharger actuator drive system.

[0045] In addition, the above test method is improved by combining a sensor on the original pull rod structure. The sensor is connected to the HBM test system for communication, so as to directly and accurately measure the pull rod tension of the turbocharger. By setting the electronic actuator opening in the UADbox controller, the maximum opening allowed by the electronic actuator under different engine speeds and loads can be effectively measured. The operation is simple and does not require complex calculations and models. At the same time, the tension data can be obtained in real time, which is convenient for timely understanding of the working status of the engine and supercharger.

[0046] See also Figures 4 to 6 In some embodiments, a drive system load test device for calibrating the turbocharger of the above embodiment is also provided, including a turbocharger 400, an electronic actuator 100 integrally provided with the turbocharger 400, and a cut-off rod 200. It can be understood that the structure and installation position relationship of the above turbocharger 400 and the electronic actuator 100 can be known from the prior art, and will not be elaborated here. The improvement point is the cut-off rod 200.

[0047] In some embodiments, tension transfer studs 230 are fixedly connected to the end surfaces of both sides of the tension sensor 300, and the truncated pull rod 100 includes: a first rod member 210, a first connecting portion 211 is provided at one end of the first rod member 210, and a first through hole 212 is provided at the other end, the first connecting portion 211 is fixedly connected to the tension transfer stud 230, a second rod member 230, a second connecting portion 221 is provided at one end of the second rod member 220, the second connecting portion 221 is fixedly connected to the tension transfer stud 230, and a second through hole 222 is provided at the other end, the first through hole 212 and the second through hole 222 are used for fixed connection of the pull rod, the first rod member 210, the second rod member 220 and the tension sensor 300 are coaxially connected, so as to achieve accurate measurement of the tension of the pull rod of the turbocharger 400.

[0048] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the invention.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0050] Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Mentioning "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present embodiment application. The appearance of this phrase in various positions in the specification is not necessarily the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0051] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0052] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the disclosure disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

Claims

1. A drive system load test method for turbocharger calibration, characterized in that: include: Building a test platform, the test platform comprising an engine mounted on a test bench, a turbocharger, an electronic actuator for controlling the opening of the turbocharger, and a UADbox controller electrically connected to the electronic actuator; Acquiring empirical data of the pull rod tension of the turbocharger, and presetting a target tension threshold value according to the empirical data; Acquire the engine speed limit value, and set a plurality of steady-state speed values ​​from low to high intervals based on the speed limit value; Adjusting the load and speed of the engine, wherein the speed is adjusted to the corresponding steady-state speed value, and adjusting the opening of the electronic actuator from the first opening value to the second opening value within a first preset time to obtain a test data set of the pull rod tension; According to the test data set, it is determined whether it is less than the target tension threshold, and if so, the test data set and the corresponding opening of the electronic actuator are output.

2. A drive system load test method for turbocharger calibration according to claim 1, characterized in that: The test platform comprises an engine mounted on a test bench, a turbocharger, an electronic actuator for controlling the opening of the turbocharger, and a UADbox controller electrically connected to the electronic actuator, and further comprises: A tension sensor for measuring the tension of the turbocharger pull rod, wherein the tension sensor is electrically connected to an HBM testing system.

3. A drive system load test method for turbocharger calibration according to claim 2, characterized in that: The tension sensor is a resistance strain type tension sensor, and the HBM testing system is configured to preset a target tension threshold of the tension of the pull rod.

4. A drive system load test method for turbocharger calibration according to claim 1, characterized in that: The step of adjusting the load and speed of the engine, wherein the speed is adjusted to the corresponding steady-state speed value, and adjusting the opening of the electronic actuator from the first opening value to the second opening value within a first preset time to obtain a test data set of the pull rod tension, includes: Static adjustment is performed on the load and speed of the engine, and the opening of the electronic actuator is adjusted from a first opening value to a second opening value within a first preset time, so as to obtain first sub-data of the tension of the pull rod under steady-state conditions; The load and speed of the engine are dynamically adjusted, and the opening of the electronic actuator is adjusted from a first opening value to a second opening value within a first preset time, so as to obtain second sub-data of the tension of the pull rod under transient working conditions.

5. A drive system load test method for turbocharger calibration according to claim 4, characterized in that: The static adjustment of the load and speed of the engine, and the adjustment of the opening of the electronic actuator from a first opening value to a second opening value within a first preset time, to obtain the first sub-data of the tension of the pull rod under a steady-state condition, include: The steady-state operating condition test adjusts the engine load to full load, adjusts the engine speed to each corresponding steady-state speed value in turn, and adjusts the opening of the electronic actuator from the first opening value to the second opening value within a first preset time to obtain the first sub-data of the pull rod tension corresponding to each steady-state speed value under steady-state conditions.

6. A drive system load test method for turbocharger calibration according to claim 4, characterized in that: The method of dynamically adjusting the load and speed of the engine and adjusting the opening of the electronic actuator from a first opening value to a second opening value within a first preset time to obtain second sub-data of the tension of the pull rod under transient working conditions also includes: The transient operating condition test adjusts the opening of the electronic actuator from the first opening value to the second opening value within the first preset time, adjusts the engine load from the first load value to the full load within the second preset time, and adjusts the engine speed from adjacent steady-state speed values ​​in turn within the third preset time to obtain the second sub-data of the pull rod tension corresponding to each adjacent steady-state speed value change process under the transient operating condition.

7. The drive system load test method for turbocharger calibration according to claim 1, characterized in that: The determining, based on the test data set, whether it is less than the target tension threshold, and if so, outputting the test data set and the corresponding opening of the electronic actuator, comprises: If the test data set is greater than the target tension threshold, the second opening value of the electronic actuator is reduced, and the pull rod tension of the turbocharger corresponding to different engine states is measured again.

8. A drive system load test method for turbocharger calibration according to claim 7, characterized in that: If the test data set is greater than the target tension threshold, reducing the second opening value of the electronic actuator, and measuring again the pull rod tension of the turbocharger corresponding to different engine states, comprises: If the test data set is greater than the target tension threshold, reducing the second opening value of the electronic actuator; The load and speed of the engine are adjusted again statically and dynamically to obtain the pull rod tension of the turbocharger under steady-state working conditions and transient working conditions.

9. A drive system load test device for turbocharger calibration, characterized in that: The test platform is applied to the test method according to any one of claims 1 to 8, and comprises a truncated pull rod and a tension sensor coaxially arranged with the truncated pull rod.

10. A drive system load test device for turbocharger calibration according to claim 9, characterized in that: The tension sensor has a first surface and a second surface which are relatively parallel; The truncation tie rod comprises: a first rod, one end of which is fixedly connected to the first surface; a second rod, the second rod being fixedly connected to the second surface; The first rod, the tension sensor and the second rod are coaxially arranged.

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