Novel gear shifting execution system

Abstract

The device comprises a processing module, the processing module is electrically connected to a power supply module, the power supply module continuously supplies power to the processing module and connecting parts of the processing module, the processing module is provided with an analog sampling group, and the analog sampling group is composed of a position signal detection unit and a speed signal detection unit. The processing module is used for continuously monitoring the overall dynamic state, the processing module is further connected with a CAN communication unit and receives instructions of a vehicle control unit through CAN communication, one end of the processing module is in signal connection with a field effect management driver, and the field effect management driver carries out dual-motor driving and carries out control through a gear shifting actuator. By refining system requirements and application scenes and designing a hardware scheme of the gear shifting actuator in detail, quick response of system gear shifting is achieved, and the performance of the hybrid power system is effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hybrid systems, and more specifically, particularly relates to a novel gear shift execution system. Background Art

[0002] At present, the main market for the system developed by our company is hybrid commercial vehicles. The engine is arranged on the whole vehicle. Through the shift actuator, it can quickly respond to the gear shifting action of the whole vehicle, effectively improve the response speed of the whole vehicle, and improve the driving feel of the whole vehicle. In the early stage, our company did not have targeted product matching. Although some suppliers can provide corresponding products, the price is relatively high, and it is still delivered in black boxes without providing key technologies. At the same time, it needs to be highly matched with our company's hybrid system, and the software needs to be adjusted in a targeted manner.

[0003] In the early stage, our company's first-generation hybrid system did not have a gear shift execution unit. After the launch of the entire system, it was widely welcomed by the market and was in the leading position in the industry. In order to further optimize the system, it was proposed to add a gear shift controller to the system. By adding a gear shift actuator, the system capability can be effectively improved, and it can also be more in line with the use environment of commercial vehicles. At the same time, it also has a significant improvement in the fuel saving rate of the whole vehicle.

[0004] Although there are shift actuator products on the market, they are still delivered as black boxes due to their high cost, which makes it inconvenient for targeted debugging of the system later. The original system solution does not have a shift actuator. The system has low starting torque at low speeds and cannot increase the maximum speed of the vehicle. Compared with pure fuel vehicles, the fuel saving rate is not obvious, and the advantages of the hybrid system cannot be fully reflected. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a novel gear shift execution system to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a new type of gear shift execution system, including a processing module, The processing module is electrically connected to the power module, and the power module is used to continuously power the processing module and its connected components. The processing module is provided with an analog sampling group, which is composed of position signal detection and speed signal detection, so as to continuously monitor the overall dynamics. The processing module is also connected to a CAN communication unit to receive vehicle controller instructions through CAN communication. The signal at one end of the processing module is connected to the field effect management driver, and the field effect management driver includes two H-bridge drive circuits. Each H-bridge drive circuit includes an H-bridge drive chip for protecting drive module A and drive module B, and has a fault diagnosis function. One end of the two H-bridge drive circuits is respectively connected to drive module A and drive module B. Drive module A and drive module B are both provided with 4 MOSFET power devices, allowing a maximum output current of 120A and a maximum breakdown voltage of 60V, meeting the minimum operating voltage requirement of the 24V system; one end of drive module A is connected to the first motor, and one end of drive module B is connected to the second motor. The first motor and the second motor are both single-phase DC motors. Dual motor drive is performed by the first motor and the second motor, and is controlled by a shift actuator.

[0007] As an optional solution of the present invention, the processing module adopts the main chip U7, which uses TI's C2000 real-time microcontroller with a main frequency of 90MHz and a 32-bit processor.

[0008] As an optional solution of the present invention, the processing module is also externally provided with an EEPROM chip to facilitate real-time storage of motor position information and fault information.

[0009] As an optional solution of the present invention, the power module adopts a power supply chip U2 that supports multiple power outputs, supports 12V or 24V power supply platform operation, outputs 1 +5V voltage internally to power the analog sampling group, 1 +3V3 voltage to power the main chip and its peripheral circuits, and outputs 3 +5V voltages externally to power external sensors, such as position sensors, oil pressure sensors, etc. Through the multiple power output topology, the power supply is reasonably distributed and supplied separately.

[0010] As an optional solution of the present invention, the CAN communication adopts a differential signal transmission mode and a CSMA / CD technology to support data transmission between multiple nodes.

[0011] As an optional solution of the present invention, a protection unit is connected to one side of the processing module. When the shift actuator is working, the protection unit will monitor the current during the shift operation in real time. When the bus current overcurrent occurs, the hardware overcurrent protection will be triggered.

[0012] As an optional solution of the present invention, the processing module is connected to a high-side drive output circuit to provide electrical isolation, protect sensitive control circuits and avoid ground loop noise.

[0013] As an optional solution of the present invention, a gyroscope functional area is provided on the processing module for detecting the working condition information of the whole vehicle.

[0014] The present invention provides a novel gear shift execution system, which has the following beneficial effects: By adding a gear shift execution system, the vehicle's starting, acceleration, fuel saving effects, etc. can be significantly improved. The system's functions can be effectively enriched to improve the vehicle's safety and flexibility.

[0015] By refining system requirements and application scenarios, and designing the hardware solution of the shift actuator in detail, we can achieve rapid response of system shifting and effectively improve the performance of the hybrid system. By working together with the shift actuator, the system gears can be increased. When starting at low speeds, the starting torque can be increased, the load capacity can be increased, and the maximum speed of the vehicle can be increased, and the acceleration can be improved. At the same time, different gear selections can be used to effectively improve the fuel saving rate, give full play to the advantages of the hybrid system, and increase the competitiveness of hybrid models. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a system layout diagram of the present invention; Figure 2 is a functional circuit diagram of a gyroscope of the present invention; Figure 3 It is a functional circuit diagram of the power module of the present invention; Figure 4 The shift motor driving circuit diagram of the present invention; Figure 5 The bus current protection circuit diagram of the present invention; Figure 6 This is a circuit diagram of the CAN communication module of the present invention. DETAILED DESCRIPTION

[0017] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See also Figures 1 to 6 The present invention provides a technical solution: a new type of shift execution system, including a processing module, the processing module adopts a main chip U7, which selects TI's C2000 real-time microcontroller, the main frequency is 90MHz, the processor is 32-bit, and it also has FPU, VCU, 256KB flash memory and other functions. The use of this chip can fully meet the resource requirements of the shift actuator. By reasonably allocating pins, it can achieve effective control of the motor, feedback of key signals, fault diagnosis, etc. At the same time, through the coordinated work with the whole vehicle system, it can also realize the OTA function, which is convenient for the maintenance and upgrade of the later software and reduces the product maintenance cost. The processing module also has an external EEPROM chip to facilitate the real-time storage of motor position information and fault information.

[0021] like Figure 1 , 3 As shown, the processing module is electrically connected to the power module, and the power module is used to continuously power the processing module and its connected components. An analog sampling group is arranged on the processing module, and the analog sampling group is composed of position signal detection and speed signal detection, so as to continuously monitor the overall dynamics. The power module adopts a power chip U2 that supports multi-channel power output, supports 12V or 24V power supply platform operation, outputs 1 +5V voltage internally to power the analog sampling group, 1 +3V3 voltage to power the main chip and its peripheral circuits, and outputs 3 +5V voltage externally to power external sensors, such as position sensors, oil pressure sensors, etc. Through the multi-channel power output topology, the power supply is reasonably distributed and supplied separately, which effectively reduces the crosstalk of the digital part to the analog part, improves the power supply environment of the system, and at the same time, protects the input end of the power module, sets TVS1, Q1, etc., to meet the national standard requirements.

[0022] like Figure 1 , 6 As shown, the processing module is also connected to a CAN communication unit, which receives vehicle controller instructions through CAN communication. CAN communication adopts differential signal transmission, which can effectively resist electromagnetic interference and noise interference, and has high reliability. It adopts CSMA / CD technology, which can realize real-time communication between multiple nodes, has high real-time performance, supports data transmission between multiple nodes, and facilitates the expansion of system functions to meet the needs of different application scenarios. The shift actuator and the vehicle system both adopt CAN communication.

[0023] A protection unit is connected to one side of the processing module. When the shift actuator is working, the protection unit will monitor the current during the shift operation in real time. When the bus current is overcurrent, it will trigger the hardware overcurrent protection. The protection circuit is implemented through a comparator solution. The design scheme is shown in the screenshot below.

[0024] like Figure 1 , 4 As shown, the signal at one end of the processing module is connected to the field effect management driver. The field effect management driver includes two H-bridge drive circuits. Each H-bridge drive circuit includes an H-bridge drive chip. The H-bridge drive chip has abnormal state diagnosis functions such as short circuit, overvoltage, undervoltage, overtemperature, etc., which is used to protect drive module A and drive module B and motors from damage due to abnormal operation. One end of the two H-bridge drive circuits is connected to drive module A and drive module B respectively. Drive module A and drive module B are both provided with 4 MOSFET power devices, allowing a maximum output current of 120A and a maximum breakdown voltage of 60V, which meet the minimum operating voltage requirements of the 24V system; one end of drive module A is connected to the first motor, and one end of drive module B is connected to the second motor. The first motor and the second motor are both single-phase DC motors. Dual motor drive is performed through the first motor and the second motor, and is controlled by the shift actuator to drive the two shift actuators.

[0025] like Figure 1 , 5 As shown, in order to improve system safety and distinguish between upper and lower bridge short circuits and motor stalling, the solution will sample the phase current and bus current at the same time, which can effectively diagnose system overcurrent anomalies and improve product reliability.

[0026] A high-side driver output circuit is connected to the processing module to provide better electrical isolation, eliminating the need to switch between the load and the ground line, further protecting sensitive control circuits and avoiding ground loop noise; in addition, the high-side driver can better control loads that require a positive power supply voltage to work properly.

[0027] like Figure 1 , 2 As shown, in addition, a gyroscope functional area is set on the processing module, which can detect the acceleration of the whole vehicle, uphill inclination and other working condition information. By collecting this kind of information, the reliability of the whole vehicle system can be effectively improved.

[0028] The processing module will collect feedback on all output signals, monitor the signal quality in real time, and determine whether the system is working safely on orbit.

[0029] In short, the self-developed shift control system is based on controlling costs, enriching product functions to the maximum extent, improving product performance, and being compatible with different levels of shift actuators in the market. By using the shift system, the hybrid system has a qualitative improvement. On the basis of more compatible integration, it can also reduce vehicle fuel consumption and improve fuel saving rate.

[0030] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel gear shift execution system, characterized in that: Including processing module, The processing module is electrically connected to the power module, and the power module is used to continuously power the processing module and its connected components. The processing module is provided with an analog sampling group, which is composed of position signal detection and speed signal detection, so as to continuously monitor the overall dynamics. The processing module is also connected to a CAN communication unit to receive vehicle controller instructions through CAN communication. The signal at one end of the processing module is connected to the field effect management driver, and the field effect management driver includes two H-bridge drive circuits, each of which includes an H-bridge drive chip for protecting the drive module A and the drive module B, and has a fault diagnosis function. One end of the two H-bridge drive circuits is connected to the drive module A and the drive module B respectively. The drive module A and the drive module B are both provided with 4 MOSFET power devices, allowing a maximum output current of 120A and a maximum breakdown voltage of 60V, which meets the minimum operating voltage requirement of the 24V system; One end of the drive module A is connected to the first motor, and one end of the drive module B is connected to the second motor. The first motor and the second motor are both single-phase DC motors. Dual motor drive is performed through the first motor and the second motor and is controlled by a shift actuator.

2. A novel gear shift execution system according to claim 1, characterized in that: The processing module adopts the main chip U7, which uses TI's C2000 real-time microcontroller, with a main frequency of 90MHz and a 32-bit processor.

3. A novel gear shift execution system according to claim 2, characterized in that: The processing module is also provided with an external EEPROM chip, so as to facilitate the real-time storage of the motor position information and fault information.

4. A novel gear shift execution system according to claim 1, characterized in that: The power module adopts a power supply chip U2 that supports multiple power outputs, supports 12V or 24V power supply platform operation, outputs 1 +5V voltage internally to power the analog sampling group, 1 +3V3 voltage to power the main chip and its peripheral circuits, and outputs 3 +5V voltages externally to power external sensors, such as position sensors, oil pressure sensors, etc. Through the multi-power output topology, the power supply is reasonably distributed and supplied separately.

5. A novel gear shift execution system according to claim 1, characterized in that: The CAN communication adopts a differential signal transmission mode and CSMA / CD technology to support data transmission between multiple nodes.

6. A novel gear shift execution system according to claim 1, characterized in that: A protection unit is connected to one side of the processing module. When the shift actuator is working, the protection unit will monitor the current during the shift operation in real time. When the bus current has an overcurrent phenomenon, the hardware overcurrent protection will be violated.

7. A novel gear shift execution system according to claim 1, characterized in that: The processing module is connected with a high-side drive output circuit to provide electrical isolation, protect sensitive control circuits and avoid ground loop noise.

8. A novel gear shift execution system according to claim 1, characterized in that: The processing module is provided with a gyroscope functional area for detecting the working condition information of the whole vehicle.

Images