Hybrid transmission and test bench, control method and transmission test system

Abstract

This invention discloses a hybrid transmission, a test bench, a control method thereof, and a transmission testing system. The control method for the hybrid transmission includes the following steps: after obtaining first transmission execution parameters and first bench execution parameters, controlling the corresponding transmission actuator on the hybrid transmission according to the first transmission execution parameters; sending the first bench execution parameters to the test bench controller, so that the test bench controller controls the corresponding bench actuator on the test bench according to the first bench execution parameters. By receiving and transmitting the first bench execution parameters to the test bench controller, the hybrid transmission controller becomes the main controller, and the test bench controller is only used to receive instructions issued by the hybrid transmission controller, so that the test bench can change accurately in real time based on the actual operating conditions of the hybrid transmission. The entire experimental process only requires relevant hybrid transmission professionals, but not test bench professionals.

Description

Technical Field

[0001] This invention relates to the field of hybrid transmission testing technology, and in particular to a hybrid transmission and test bench, its control method, and a transmission testing system. Background Technology

[0002] The development of hybrid transmissions requires the use of test benches to simulate real vehicle engines and road loads to complete functional verification, off-line calibration, efficiency and temperature rise tests. However, current testing methods have some drawbacks. Some experiments have very high real-time requirements. For example, in whole-vehicle test bench simulations, the input and output motors of the test bench need to change in real time with the operating conditions, and the state of the transmission needs to be synchronized with the state of the test bench. Therefore, such experiments require both test bench specialists and hybrid transmission specialists to be present and work together to achieve the real-time requirements, resulting in high labor and time costs. Summary of the Invention

[0003] The main objective of this invention is to propose a hybrid transmission and test bench, its control method, and a transmission testing system, aiming to solve the problem that existing hybrid transmission experiments require both test bench professionals and transmission professionals to be present simultaneously, resulting in high experimental costs.

[0004] To achieve the above objectives, this invention proposes a control method for a hybrid transmission, comprising the following steps:

[0005] After obtaining the first transmission execution parameters and the first test bench execution parameters, the corresponding transmission actuator on the hybrid transmission is controlled to operate according to the first transmission execution parameters;

[0006] The first bench execution parameters are sent to the test bench controller so that the test bench controller controls the corresponding bench execution mechanism on the bench to operate according to the first bench execution parameters.

[0007] Optionally, it also includes:

[0008] Obtain the input parameters for the first experimental conditions;

[0009] The execution parameters of the first transmission and the execution parameters of the first test bench are calculated based on the first experimental condition parameters.

[0010] Optionally, the first experimental condition parameters include throttle opening, braking force, and gear parameters.

[0011] Optionally, the first transmission execution parameters include electronic pump flow rate, motor operating mode, motor torque, and motor speed.

[0012] Optionally, the bench actuator includes an output motor and an input motor, the output motor being driven to the output shaft of the hybrid transmission, and the input motor being driven to the input shaft of the hybrid transmission;

[0013] The first test bench's execution parameters include the target speed and the target torque.

[0014] The present invention also provides a hybrid transmission controller, including a memory and a processor, and a control method for the hybrid transmission stored in the memory and executable on the processor, the control method for the hybrid transmission being configured to implement the steps of the above-described control method for the hybrid transmission.

[0015] The present invention also provides a method for controlling an experimental platform, comprising the following steps:

[0016] After obtaining the second transmission execution parameters and the second test bench execution parameters, the corresponding test bench execution mechanism on the test bench is controlled to operate according to the second test bench execution parameters;

[0017] The second transmission execution parameters are sent to the hybrid transmission controller, so that the hybrid transmission controller controls the corresponding bench actuator on the hybrid transmission to operate according to the second transmission execution parameters.

[0018] Optionally, obtaining the second transmission execution parameters and the second test bench execution parameters includes:

[0019] Obtain the input execution parameters for the second rack;

[0020] The second transmission execution parameters are calculated based on the second test bench execution parameters.

[0021] The present invention also provides an experimental bench controller, including a memory and a processor, and a control method for the experimental bench stored in the memory and executable on the processor, wherein the control method for the experimental bench is configured to implement the steps of the above-described control method for the experimental bench.

[0022] Furthermore, the present invention also provides a transmission testing system, comprising:

[0023] A hybrid transmission controller, including the aforementioned hybrid transmission controller; and,

[0024] The test bench controller includes the aforementioned test bench controller, which is electrically connected to the hybrid transmission controller.

[0025] In the technical solution of this invention, when the hybrid transmission receives the first transmission execution parameters, the hybrid transmission controller, on the one hand, controls the operation of the transmission actuator on the hybrid transmission to ensure that the relevant parameters of the hybrid transmission meet the experimental requirements; on the other hand, it sends the received first bench execution parameters to the test bench controller, so that the test bench controller controls the operation of the bench actuator, enabling the test bench to simulate road loads adapted to the hybrid transmission. Thus, by receiving and transmitting the first bench execution parameters to the test bench controller, the hybrid transmission controller becomes the main controller, and the test bench controller only receives instructions from the transmission controller, enabling the hybrid transmission controller to control the operation of the bench actuator. This allows the test bench to change accurately and in real time based on the actual operating conditions of the hybrid transmission. The entire experimental process only requires the relevant hybrid transmission professionals, without the need for test bench professionals, thereby solving the problem that hybrid transmission experiments require both test bench professionals and transmission professionals to be present simultaneously to achieve real-time requirements, resulting in high experimental costs. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the hybrid transmission controller provided by the present invention;

[0028] Figure 2 A flowchart illustrating a first embodiment of the control method for a hybrid transmission provided by the present invention;

[0029] Figure 3 A schematic diagram of the structure of the experimental bench controller provided by the present invention;

[0030] Figure 4 A flowchart illustrating the first embodiment of the control method for the experimental platform provided by the present invention.

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0034] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0035] The development of hybrid transmissions requires the use of test benches to simulate real vehicle engines and road loads to complete functional verification, off-line calibration, efficiency and temperature rise tests. However, current testing methods have some drawbacks. Some experiments have very high real-time requirements, such as whole-vehicle test bench simulations. These require the input and output motors of the test bench to change in real time according to the operating conditions, and the state of the transmission must be synchronized with the state of the test bench. Therefore, such experiments require both test bench specialists and hybrid transmission specialists to be present and work together rigorously to meet the real-time requirements, resulting in high labor and time costs.

[0036] In view of this, the present invention provides a transmission testing system aimed at solving the problem that existing hybrid transmission experiments require both benchtop specialists and transmission specialists to be present simultaneously, resulting in high experimental costs. The transmission testing system includes a hybrid transmission controller and a test bench controller electrically connected to the hybrid transmission controller. Any transmission testing system that protects the test transmission controller and the test bench controller is within the protection scope of this invention.

[0037] Reference Figure 1 , Figure 1 This is a schematic diagram of the hybrid transmission controller involved in the embodiment of the present invention.

[0038] like Figure 1 As shown, the hybrid transmission controller may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0039] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a control program for a hybrid transmission controller.

[0040] exist Figure 1 In the hybrid transmission controller shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the hybrid transmission controller of the present invention can be set in the hybrid transmission controller. The hybrid transmission controller calls the control program of the hybrid transmission controller stored in the memory 1005 through the processor 1001 and executes the control method of the hybrid transmission controller provided in the embodiment of the present invention.

[0041] exist Figure 1 In the controller shown, the processor 1001 calls the control program for the hybrid transmission stored in the memory 1005 and performs the following operations:

[0042] After obtaining the first transmission execution parameters and the first test bench execution parameters, the corresponding transmission actuator on the hybrid transmission is controlled to operate according to the first transmission execution parameters;

[0043] The first bench execution parameters are sent to the test bench controller so that the test bench controller controls the corresponding bench execution mechanism on the bench to operate according to the first bench execution parameters.

[0044] Furthermore, it also includes:

[0045] Obtain the input parameters for the first experimental conditions;

[0046] The execution parameters of the first transmission and the execution parameters of the first test bench are calculated based on the first experimental condition parameters.

[0047] Furthermore, the first experimental condition parameters include throttle opening, braking force, and gear parameters.

[0048] Furthermore, the first transmission execution parameters include electronic pump flow rate, motor operating mode, motor torque, and motor speed.

[0049] Furthermore, the bench actuator includes an output motor and an input motor, the output motor being driven connected to the output shaft of the hybrid transmission, and the input motor being driven connected to the input shaft of the hybrid transmission;

[0050] The first test bench's execution parameters include the target speed and the target torque.

[0051] Based on the above hardware structure, this invention proposes a control method for a hybrid transmission. Please refer to [reference needed]. Figure 2 , Figure 2 This is a flowchart illustrating an embodiment of the control method for a hybrid transmission provided by the present invention.

[0052] The control method for the hybrid transmission includes the following steps:

[0053] S10a: After obtaining the first transmission execution parameters and the first test bench execution parameters, control the corresponding transmission execution mechanism on the hybrid transmission to operate according to the first transmission execution parameters;

[0054] It should be noted that the first transmission execution parameters should be parameters that the transmission actuator can directly identify, including but not limited to electronic pump flow rate, motor operating mode, motor torque, and motor speed. The motor operating mode includes direct drive mode, hybrid mode, range extender mode, or regeneration mode, etc. The motor torque and motor speed refer to the torque and speed of the motor within the hybrid transmission. The transmission actuator includes, but is not limited to, the motor and electronic pump within the hybrid transmission. The first bench execution parameters should be parameters that the bench actuator can directly identify, including target speed and target torque.

[0055] S20a: The first bench execution parameters are sent to the test bench controller so that the test bench controller controls the corresponding bench execution mechanism on the bench to operate according to the first bench execution parameters.

[0056] It should be noted that the bench actuator includes an output motor and an input motor. The output motor is driven and connected to the output shaft of the hybrid transmission to simulate an engine. The input motor is driven and connected to the input shaft of the hybrid transmission to simulate road load. The first bench execution parameters include a target speed and a target torque. The target speed includes the speed of the output motor and the speed of the input motor. The target torque includes the torque of the output motor and the torque of the input motor.

[0057] In this embodiment, after the hybrid transmission controller receives the first transmission execution parameters, it controls the transmission actuator on the hybrid transmission to ensure that the relevant parameters of the hybrid transmission meet the experimental requirements. Simultaneously, it sends the received first bench execution parameters to the test bench controller, enabling the test bench controller to control the bench actuator. This allows the test bench to simulate road loads compatible with the hybrid transmission. By receiving and transmitting the first bench execution parameters to the test bench controller, the hybrid transmission controller acts as the master controller, while the test bench controller only receives instructions from the hybrid transmission controller. This allows the hybrid transmission controller to control the bench actuator, enabling the test bench to accurately and in real-time adapt to the actual operating conditions of the hybrid transmission. The entire experimental process requires only hybrid transmission specialists, not test bench specialists, thus solving the problem of high experimental costs caused by the need for both test bench and transmission specialists to be present simultaneously to achieve real-time performance in hybrid transmission experiments.

[0058] It should be noted that the communication methods between the hybrid transmission controller and the test bench controller include, but are not limited to, CAN communication.

[0059] Furthermore, the control method for the hybrid transmission also includes:

[0060] S01a: Obtain the first experimental condition parameters input;

[0061] It should be noted that the first experimental conditions parameters include, but are not limited to, throttle opening, braking force, and gear parameters, which are used to simulate the operation of a driver while driving.

[0062] It is understood that the gear parameters include forward gear, reverse gear, and gear size, etc.

[0063] S02a: The execution parameters of the first transmission and the execution parameters of the first test bench are calculated based on the first experimental condition parameters.

[0064] In this embodiment, since there are many parameters in the first transmission execution parameters and the first test bench execution parameters, it is easy for the experimenter to make mistakes when inputting them. Therefore, the hybrid transmission will convert the first experimental condition parameters into first transmission execution parameters and first test bench execution parameters that can be recognized by the transmission actuator and the test bench actuator, so as to control the transmission actuator and the test bench actuator to perform corresponding actions, so as to transform the first transmission execution parameters and the first test bench execution parameters into the first experimental condition parameters, thereby reducing the input parameters of the hybrid transmission controller and thus helping to reduce the probability of input errors.

[0065] The following will illustrate the working process of the hybrid transmission controller using a vehicle road test, in conjunction with the above embodiments.

[0066] After the hybrid transmission controller receives the input first experimental condition parameters, it calculates the first transmission execution parameters (including electronic pump flow rate, motor operating mode, motor torque, and motor speed) and the first test bench execution parameters (including target speed and target torque). Based on the first transmission execution parameters, it controls the transmission actuator to ensure that the relevant parameters of the hybrid transmission meet the experimental requirements. Simultaneously, the hybrid transmission controller sends the first test bench execution parameters to the test bench controller and controls the test bench actuator to simulate road loads compatible with the hybrid transmission. Thus, through the interaction between the hybrid transmission controller and the test bench controller, the test bench can change accurately and in real time based on the actual operating conditions of the hybrid transmission.

[0067] like Figure 3As shown, the experimental bench controller may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0068] like Figure 3 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a control program for the experimental bench controller.

[0069] exist Figure 3 In the experimental bench controller shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the experimental bench controller of the present invention can be set in the experimental bench controller. The experimental bench controller calls the control program of the experimental bench stored in the memory 1005 through the processor 1001 and executes the control method of the experimental bench controller provided in the embodiment of the present invention.

[0070] exist Figure 3 In the controller shown, the processor 1001 calls the control program of the experimental platform stored in the memory 1005 and performs the following operations:

[0071] exist Figure 3 In the controller shown, the processor 1001 calls the control program of the experimental platform stored in the memory 1005 and performs the following operations:

[0072] After obtaining the second transmission execution parameters and the second test bench execution parameters, the corresponding test bench execution mechanism on the test bench is controlled to operate according to the second test bench execution parameters;

[0073] The second transmission execution parameters are sent to the hybrid transmission controller, so that the hybrid transmission controller controls the corresponding bench actuator on the hybrid transmission to operate according to the second transmission execution parameters.

[0074] Furthermore, obtaining the second transmission execution parameters and the second test bench execution parameters includes:

[0075] Obtain the input execution parameters for the second rack;

[0076] The second transmission execution parameters are calculated based on the second test bench execution parameters.

[0077] Based on the above hardware structure, this invention proposes a control method for an experimental platform. Please refer to [reference needed]. Figure 4 , Figure 4 This is a flowchart illustrating an embodiment of the control method for the experimental platform provided by the present invention.

[0078] The control method for the experimental platform includes the following steps:

[0079] S10b: After obtaining the second transmission execution parameters and the second test bench execution parameters, control the corresponding test bench execution mechanism on the test bench to operate according to the second test bench execution parameters;

[0080] It should be noted that the second bench execution parameters should be parameters that the bench execution mechanism can directly recognize, including the target speed and the target torque. The bench execution mechanism includes an output motor and an input motor. The output motor is driven and connected to the input shaft of the hybrid transmission to simulate an engine. The input motor is driven and connected to the output shaft of the hybrid transmission to simulate road load. The second bench execution parameters include the target speed and the target torque. The target speed includes the speed of the output motor and the speed of the input motor, and the target torque includes the torque of the output motor and the torque of the input motor.

[0081] S20b: The second transmission execution parameters are sent to the hybrid transmission controller, so that the hybrid transmission controller controls the corresponding bench actuator on the hybrid transmission to operate according to the second transmission execution parameters.

[0082] It should be noted that the second transmission execution parameters should be parameters that the transmission actuator can directly identify, including but not limited to electronic pump flow rate, motor operating mode, motor torque and motor speed. The motor operating mode includes direct drive mode, hybrid mode, range extender mode or regeneration mode, etc. The motor torque and motor speed refer to the torque and speed of the motor in the hybrid transmission.

[0083] In this embodiment, when the test bench controller receives the second test bench execution parameters, it controls the test bench actuator on the test bench to ensure that the relevant parameters of the test bench meet the experimental requirements. Simultaneously, it sends the received second transmission execution parameters to the hybrid transmission controller, which then controls the transmission actuator to ensure the hybrid transmission can simulate and adapt to the test bench. Thus, by receiving and transmitting the second transmission execution parameters to the hybrid transmission controller, the test bench controller becomes the master controller, while the hybrid transmission controller only receives instructions from the test bench controller. This allows the test bench controller to control the transmission actuator, enabling the hybrid transmission to accurately and in real-time adapt to the test bench's operating conditions. The entire experimental process requires only qualified personnel for the test bench, not for the hybrid transmission itself. This solves the problem of high experimental costs caused by the need for both test bench and transmission specialists to be present simultaneously to achieve real-time performance in hybrid transmission experiments.

[0084] It should be noted that the communication methods between the hybrid transmission controller and the test bench controller include, but are not limited to, CAN communication.

[0085] Furthermore, obtaining the second transmission execution parameters and the second test bench execution parameters includes:

[0086] S01b: Obtain the input execution parameters for the second rack;

[0087] S02b: The second transmission execution parameters are calculated based on the second test bench execution parameters.

[0088] In this embodiment, since there are many parameters in the second transmission execution parameters and the second bench execution parameters, it is easy for the experimenter to make mistakes when inputting them. Therefore, the test bench will convert the acquired second bench execution parameters into second transmission execution parameters that can be recognized by the transmission actuator to control the transmission actuator to perform corresponding actions, so as to associate the second transmission execution parameters with the second bench execution parameters, thereby reducing the input parameters of the test bench controller and thus helping to reduce the probability of input errors.

[0089] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A control method for a hybrid transmission, characterized in that, Includes the following steps: Obtain the input parameters for the first experimental conditions; The first experimental condition parameters include throttle opening, braking force, and gear parameters; The execution parameters of the first transmission and the execution parameters of the first test bench are calculated based on the first experimental condition parameters. After obtaining the first transmission execution parameters and the first test bench execution parameters, the corresponding transmission actuator on the hybrid transmission is controlled to operate according to the first transmission execution parameters; The first bench execution parameters are sent to the test bench controller so that the test bench controller controls the corresponding bench execution mechanism on the bench to operate according to the first bench execution parameters; Thus, a control mode is established with the hybrid transmission controller as the master controller and the test bench controller as the slave controller; The first transmission execution parameters include the electronic pump flow rate, the operating mode of the hybrid transmission's built-in motor, the torque of the hybrid transmission's built-in motor, and the speed of the hybrid transmission's built-in motor.

2. The control method for a hybrid transmission as described in claim 1, characterized in that, The bench actuator includes an output motor and an input motor. The output motor is driven to the output shaft of the hybrid transmission, and the input motor is driven to the input shaft of the hybrid transmission. The first test bench's execution parameters include the target speed and the target torque; The target rotational speed includes the rotational speed of the output motor and the rotational speed of the input motor, and the target torque includes the torque of the output motor and the torque of the input motor.

3. A hybrid transmission controller, characterized in that, The hybrid transmission control method includes a memory and a processor, and is stored in the memory and can run on the processor. The hybrid transmission control method is configured to implement the steps of the hybrid transmission control method as claimed in any one of claims 1 to 2.

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