Bistable eight-gear electronic gear shifter system and software working architecture

Abstract

The invention discloses a bistable eight-gear electronic gear shifter system and a software working architecture, and relates to the field of vehicles, the bistable eight-gear electronic gear shifter system comprises a handball which is used as a direct interaction medium between a driver and an electronic gear shifter, and after the handball receives a key pressing action of the driver, the handball is connected with the electronic gear shifter; a gear shifting signal is sent to the electronic gear shifter; the electronic gear shifter is used for realizing gear shifting after receiving the gear shifting signal of the handball; the electronic gear shifting device has the advantages that the structure is designed in a full-autonomous mode, circuits are designed in a full-autonomous mode, chips are localized, chips are planned in a whole vehicle, complete platformization functions (CAN communication, key detection, position detection, mode detection and the like) are achieved, a complex mechanical structure is omitted, the whole gear shifting system is more flexible, the space in the vehicle is saved, and the gear shifting efficiency is improved. The gear shifting response speed is increased, safety is enhanced, meanwhile, a more intelligent gear shifting control mode can be provided, and the intelligent degree of the vehicle is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a bistable eight-speed electronic shifter system and a software working architecture. Background Art

[0002] Traditional mechanical shifters are large in size, occupy more space in the center console, have a complex internal mechanical structure, and use cables to hard-wire the gear lever and the gearbox, which cannot meet the needs of intelligent driving. Electronic shifters were first explored by well-known foreign companies such as ZF and Cosda and applied to high-end models, gaining a good market reputation. However, domestic automakers are subject to technical limitations and cost pressures and are in urgent need of domestically produced electronic shifters. Summary of the invention

[0003] The object of the present invention is to provide a bistable eight-speed electronic shifter system and a software working architecture to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A bistable eight-speed electronic shifter system, comprising:

[0006] The handball is used as a direct interaction medium between the driver and the electronic shifter. After receiving the driver's key action, it sends a shift signal to the electronic shifter.

[0007] An electronic shifter is used to shift gears after receiving a shift signal from the handball;

[0008] The electronic shifter includes:

[0009] MCU, used to comprehensively control the operation of the electronic shifter;

[0010] Dual-channel UNLOCK button detection circuit, used to detect the shift signal sent by the handball, and output it to the MCU to achieve gear shifting;

[0011] A power supply circuit is used to convert the input power into a 5V power supply as a working voltage;

[0012] CAN circuit, used to build communication between MCU and vehicle central control panel;

[0013] Dual-channel P gear button detection circuit, used to collect the P button status on the vehicle's center console and send it to the MCU;

[0014] Position sensing circuit, used to sense gear information and send it to MCU;

[0015] The handball is connected to the electronic shifter, the dual-way UNLOCK button detection circuit is connected to the MCU, the power supply circuit is connected to the MCU, the CAN circuit is connected to the MCU, the dual-way P gear button detection circuit is connected to the MCU, and the position sensing circuit is connected to the MCU.

[0016] As a further solution of the present invention: the bistable eight-speed electronic shifter system further includes a backlight brightness detection circuit for detecting a low light signal and sending the signal to the MCU; the backlight brightness detection circuit is connected to the MCU.

[0017] As a further solution of the present invention: the bistable eight-gear electronic shifter system also includes a P gear indicator light control circuit, which is used to receive a control signal from the MCU and drive the P gear indicator light to indicate when the current gear is the P gear. The P gear indicator light control circuit is connected to the MCU.

[0018] As a further solution of the present invention: the power supply circuit includes:

[0019] Surge, filtering, and voltage detection circuits are used to output 9-16V voltage to the LDO voltage stabilization circuit after anti-reverse, filtering, and EMC processing of the input voltage;

[0020] LDO voltage regulator circuit, used to output a fixed voltage of 5V as the working voltage;

[0021] The surge, filtering and voltage detection circuits are connected to the LDO voltage stabilization circuit, and the LDO voltage stabilization circuit is connected to the MCU.

[0022] As a further solution of the present invention: the CAN circuit includes:

[0023] CAN transceiver, used to realize the conversion between digital signals and physical signals, and realize the communication between CAN bus and MCU;

[0024] CAN / ESD / EMC / terminal matching resistor network is used to absorb the remaining energy of the signal, prevent the signal from being reflected during transmission, and ensure stable transmission of the signal on the CAN bus;

[0025] The MCU is connected to the CAN transceiver, and the CAN transceiver is connected to the CAN / ESD / EMC / terminal matching resistor network.

[0026] As a further solution of the present invention: the position sensing circuit includes:

[0027] Dual-channel angle Hall sensor, used to sense the current position of the lever and send it to the MCU;

[0028] The mode switch Hall sensor is used to obtain the current AUTO or Manual driving mode and send it to the MCU;

[0029] The dual-angle Hall sensor is connected to the MCU, and the mode switch Hall sensor is connected to the MCU.

[0030] A bistable eight-speed electronic shifter software working architecture includes an application software layer, a service layer, an ECU abstraction layer, a microcontroller abstraction layer, and a microcontroller. The layered software architecture of AutoSAR (Automotive Open System Architecture) is adopted. The program polls to process non-real-time tasks, and interrupt services are used to process tasks with high real-time requirements and periodic tasks.

[0031] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a fully independently designed structure, a fully independently designed circuit, domestically produced chips, and a chip-wide vehicle planning, and has complete platform functions (CAN communication, button detection, position detection, mode detection, etc.), eliminating complex mechanical structures, making the entire shift system more flexible, saving space in the vehicle, improving the shift response speed and enhancing safety, and at the same time being able to provide a more intelligent shift control method, greatly improving the intelligence of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of a bistable eight-speed electronic shifter system.

[0033] Figure 2 A schematic diagram of the software working architecture of a bistable eight-speed electronic shifter. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] See also Figure 1 , a bistable eight-speed electronic shifter system, comprising:

[0036] The handball is used as a direct interaction medium between the driver and the electronic shifter. After receiving the driver's key action, it sends a shift signal to the electronic shifter.

[0037] An electronic shifter is used to shift gears after receiving a shift signal from the handball;

[0038] The electronic shifter includes:

[0039] MCU, used to comprehensively control the operation of the electronic shifter;

[0040] Dual-channel UNLOCK button detection circuit, used to detect the shift signal sent by the handball, and output it to the MCU to achieve gear shifting;

[0041] A power supply circuit is used to convert the input power into a 5V power supply as a working voltage;

[0042] CAN circuit, used to build communication between MCU and vehicle central control panel;

[0043] Dual-channel P gear button detection circuit, used to collect the P button status on the vehicle's center console and send it to the MCU;

[0044] Position sensing circuit, used to sense gear information and send it to MCU;

[0045] The handball is connected to the electronic shifter, the dual-way UNLOCK button detection circuit is connected to the MCU, the power supply circuit is connected to the MCU, the CAN circuit is connected to the MCU, the dual-way P gear button detection circuit is connected to the MCU, and the position sensing circuit is connected to the MCU.

[0046] In this example, see Figure 1 The bistable eight-speed electronic shifter system also includes a backlight brightness detection circuit for detecting a low light signal and sending it to the MCU; the backlight brightness detection circuit is connected to the MCU.

[0047] The bistable eight-speed electronic shifter system is provided with a reserved function ( Figure 1 The dotted box) reserves a small light signal input, and drives the gear indicator light / backlight on the handball to light up or go out according to its state. The control logic has a gear display function.

[0048] In this example, see Figure 1 The bistable eight-gear electronic shifter system also includes a P gear indicator light control circuit, which is used to receive a control signal from the MCU and drive the P gear indicator light to indicate when the current gear is the P gear. The P gear indicator light control circuit is connected to the MCU.

[0049] When the dual-channel P gear button detection circuit detects that the gear is in P gear, it sends a signal to the MCU, and the MCU drives the P gear indicator light control circuit to work, making the P gear indicator light up.

[0050] In this example, see Figure 1 , the power supply circuit includes:

[0051] Surge, filtering, and voltage detection circuits are used to output 9-16V voltage to the LDO voltage stabilization circuit after anti-reverse, filtering, and EMC processing of the input voltage;

[0052] LDO voltage regulator circuit, used to output a fixed voltage of 5V as the working voltage;

[0053] The surge, filtering and voltage detection circuits are connected to the LDO voltage stabilization circuit, and the LDO voltage stabilization circuit is connected to the MCU.

[0054] The 5V voltage output here is used as the operating voltage of the MCU as well as other power-consuming circuits.

[0055] In this example, see Figure 1 , the CAN circuit includes:

[0056] CAN transceiver, used to realize the conversion between digital signals and physical signals, and realize the communication between CAN bus and MCU;

[0057] CAN / ESD / EMC / terminal matching resistor network is used to absorb the remaining energy of the signal, prevent the signal from being reflected during transmission, and ensure stable transmission of the signal on the CAN bus;

[0058] The MCU is connected to the CAN transceiver, and the CAN transceiver is connected to the CAN / ESD / EMC / terminal matching resistor network.

[0059] The MCU communicates with the CAN bus through the CAN transceiver, CAN / ESD / EMC / terminal matching resistor network.

[0060] In this example, see Figure 1 , the position sensing circuit includes:

[0061] Dual-channel angle Hall sensor, used to sense the current position of the lever and send it to the MCU;

[0062] The mode switch Hall sensor is used to obtain the current AUTO or Manual driving mode and send it to the MCU;

[0063] The dual-angle Hall sensor is connected to the MCU, and the mode switch Hall sensor is connected to the MCU.

[0064] The dual-angle Hall sensor senses the current position of the gear lever and sends it to the MCU. After processing by the filtering algorithm, the MCU sends the current gear shift request or gear lever position signal to the outside through the CAN message; the mode switch Hall sensor is used to obtain the current AUTO or Manual driving mode.

[0065] In this example, see Figure 2 The software working architecture of a bistable eight-speed electronic shifter includes an application software layer, a service layer, an ECU abstraction layer, a microcontroller abstraction layer, and a microcontroller. The layered software architecture of AutoSAR (Automotive Open System Architecture) is adopted. The program polls to process non-real-time tasks, and interrupt services are used to process tasks with high real-time requirements and periodic tasks.

[0066] Software features include:

[0067] 1. Gear shifting task: Perform gear shifting processing according to the gear shifting logic provided by the user and determine the current gear request or gear lever position;

[0068] 2. Hall task: communicate with the Hall sensor to obtain the current angle output and working status, and calculate the current lever position based on the preset calibration data;

[0069] 3. Button task: sample and obtain the current status of the P button or Unlock button, including fault diagnosis;

[0070] 4. Display task: According to the current gear position input by CAN message, drive the P indicator light or the gear indicator light to display;

[0071] 5. Communication tasks: CAN communication with the outside, responsible for processing CAN message sending and receiving, signal analysis and framing;

[0072] 6. Power management tasks: control system wake-up and sleep according to the sleep management strategy;

[0073] 7. UDS tasks: responsible for the data interaction and logic processing between the TP layer and the application layer of UDS, and for diagnostic communication with external diagnostic instruments, and responsible for the diagnosis of internal components and DTC storage;

[0074] 8.Bootloader program: Built-in boot program, which can perform local flashing and OTA upgrade of UDS CAN-based applications according to the requirements of the OEM.

[0075] The diagnosis and signal display table is as follows:

[0076]

[0077] The current fault condition is determined based on different diagnostic modes.

[0078] The working principle of the present invention is: the handball is used as a direct interaction medium between the driver and the electronic shifter, and after receiving the driver's key action, the handball sends a shift signal to the electronic shifter; the electronic shifter is used to achieve shifting after receiving the shift signal from the handball; the MCU is used to comprehensively control the operation of the electronic shifter; the dual-channel UNLOCK button detection circuit is used to detect the shift signal sent by the handball and output it to the MCU to achieve shifting; the power supply circuit is used to convert the input power into a 5V power supply as the working voltage; the CAN circuit is used to establish communication between the MCU and the vehicle's central control panel; the dual-channel P gear button detection circuit is used to collect the P button status on the vehicle's central control panel and send it to the MCU; the position sensing circuit is used to sense the gear information and send it to the MCU.

[0079] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0080] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bistable eight-speed electronic shifter system, characterized in that: The bistable eight-speed electronic shifter system includes: The handball is used as a direct interaction medium between the driver and the electronic shifter. After receiving the driver's key action, it sends a shift signal to the electronic shifter. An electronic shifter is used to shift gears after receiving a shift signal from the handball; The electronic shifter includes: MCU, used to comprehensively control the operation of the electronic shifter; Dual-channel UNLOCK button detection circuit, used to detect the shift signal sent by the handball, and output it to the MCU to achieve gear shifting; A power supply circuit is used to convert the input power into a 5V power supply as a working voltage; CAN circuit, used to build communication between MCU and vehicle central control panel; Dual-channel P gear button detection circuit, used to collect the P button status on the vehicle's center console and send it to the MCU; Position sensing circuit, used to sense gear information and send it to MCU; The handball is connected to the electronic shifter, the dual-way UNLOCK button detection circuit is connected to the MCU, the power supply circuit is connected to the MCU, the CAN circuit is connected to the MCU, the dual-way P gear button detection circuit is connected to the MCU, and the position sensing circuit is connected to the MCU.

2. The bistable eight-speed electronic shifter system according to claim 1, characterized in that: The bistable eight-speed electronic shifter system further includes a backlight brightness detection circuit for detecting a low light signal and sending the signal to the MCU; the backlight brightness detection circuit is connected to the MCU.

3. The bistable eight-speed electronic shifter system according to claim 1, characterized in that: The bistable eight-gear electronic shifter system also includes a P gear indicator light control circuit, which is used to receive a control signal from the MCU and drive the P gear indicator light to indicate when the current gear is the P gear. The P gear indicator light control circuit is connected to the MCU.

4. The bistable eight-speed electronic shifter system according to claim 1, characterized in that: The power supply circuit includes: Surge, filtering, and voltage detection circuits are used to output 9-16V voltage to the LDO voltage stabilization circuit after anti-reverse, filtering, and EMC processing of the input voltage; LDO voltage regulator circuit, used to output a fixed voltage of 5V as the working voltage; The surge, filtering and voltage detection circuits are connected to the LDO voltage stabilization circuit, and the LDO voltage stabilization circuit is connected to the MCU.

5. The bistable eight-speed electronic shifter system according to claim 1 or 4, characterized in that: The CAN circuit includes: CAN transceiver, used to realize the conversion between digital signals and physical signals, and realize the communication between CAN bus and MCU; CAN / ESD / EMC / terminal matching resistor network is used to absorb the remaining energy of the signal, prevent the signal from being reflected during transmission, and ensure stable transmission of the signal on the CAN bus; The MCU is connected to the CAN transceiver, and the CAN transceiver is connected to the CAN / ESD / EMC / terminal matching resistor network.

6. The bistable eight-speed electronic shifter system according to claim 1 or 4, characterized in that: The position sensing circuit includes: Dual-channel angle Hall sensor, used to sense the current position of the lever and send it to the MCU; The mode switch Hall sensor is used to obtain the current AUTO or Manual driving mode and send it to the MCU; The dual-angle Hall sensor is connected to the MCU, and the mode switch Hall sensor is connected to the MCU.

7. A software working architecture of a bistable eight-speed electronic shifter, characterized in that: The software working architecture of the bistable eight-speed electronic shifter includes an application software layer, a service layer, an ECU abstraction layer, a microcontroller abstraction layer, and a microcontroller. It adopts the layered software architecture of AutoSAR, and the program polls to process non-real-time tasks, and interrupts services to process tasks with high real-time requirements and periodic tasks.

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