A control system for an automatic gear shifter of an automobile

Abstract

The present invention provides a control system for an automatic shifter of an automobile, comprising a control module, a CAN module and a display module. The control module is provided with an MCU processing unit and a driving circuit. The MCU processing unit is connected to a sensor module. The sensor module collects the gear angle information of the automobile and sends it to the MCU processing unit. The MCU processing unit is also connected to a CAN module, and the gear angle information of the automobile is sent to the TCU module of the automobile through the CAN module. The display module comprises a gear lamp and a background lamp. Different gears of the automobile correspond to different gear lamps. When the automobile shifts gears, the driving circuit receives the gear shift information and controls the opening and closing of the corresponding gear lamp according to the gear shift information. A plurality of background lamps are provided, and the background lamps are connected to the automobile, and the opening and closing of the background lamps are controlled by a preset switch of the automobile. The present invention displays the current gear of the automobile through the gear lamp, and the user can intuitively understand the current gear information. At the same time, the circuit structure is simple, the circuit board is small, and the cost is low.

Description

Technical Field

[0001] The invention relates to the field of automobile shift control, and in particular to an automobile automatic shifter control system. Background Art

[0002] During the operation of the car, it is necessary to shift gears. The traditional mechanism for shifting gears is to mesh and switch between different gear sets in the mechanical gear system. Now the automotive industry can directly collect the angle information of the shift lever at different positions through sensors and realize the shifting through control circuits. The existing automatic shifter does not have a corresponding prompt device when shifting gears, and the driver cannot intuitively understand the gear position of the vehicle, especially in some dark light conditions where vision is affected.

[0003] The Chinese patent with the patent number CN204937403U discloses an electronic gear switch circuit, including a main control microprocessing unit and a gear control circuit electrically connected to the main control microprocessing unit, the gear control circuit provides a forward gear signal or a reverse gear signal to the main control microprocessing unit, and its characteristics are: it also includes a gear display circuit with 4 LEDs electrically connected to the main control microprocessing unit, the main control microprocessing unit collects the forward gear signal or the reverse gear signal and sends an LED display control signal to the gear display circuit to light up a corresponding LED in the gear display circuit. This patent provides a gear display circuit for children's cars, but its function is simple, it cannot communicate with the car TCU module to realize functions such as automatic gear shifting, and it cannot lock the gear to ensure the safety of the car. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an automobile automatic gear shift control system to solve the problem that the automobile automatic gear shifter lacks gear position display and has low safety.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] An automobile automatic shifter control system includes: a control module, a CAN module and a display module.

[0007] The control module is provided with an MCU processing unit and a driving circuit, the MCU processing unit is connected to a sensor module, the sensor module collects the gear angle information of the vehicle and sends it to the MCU processing unit, the MCU processing unit is also connected to a CAN module, and the gear angle information of the vehicle is sent to the TCU module of the vehicle through the CAN module;

[0008] The display module includes a gear light and a background light. Different gears of the car correspond to different gear lights. When the car changes gears, the drive circuit receives the gear shift information and controls the opening and closing of the corresponding gear light according to the gear shift information. There are multiple background lights, which are connected to the car and are controlled to be opened and closed by a preset switch of the car.

[0009] Optionally, the system is further provided with an electronic switch, which is connected to the car. When the car is in P gear, the electronic switch is opened, and when the car is in non-P gear, the electronic switch is closed.

[0010] Optionally, the system is further provided with a diagnostic module for performing regular diagnosis on the CAN module.

[0011] Optionally, the MCU processing unit is also connected to a shifter solenoid valve, which receives gear information sent by the TCU module and automatically opens or closes according to the gear information.

[0012] Optionally, the sensor module adopts a linear Hall sensor, and the model of the linear Hall sensor is MLX90363.

[0013] Optionally, the MCU module is also connected to a shift button, and the MCU module receives a pressing signal of the shift button and sends it to the TCU module via the CAN module.

[0014] Optionally, the CAN module further includes a power module, which steps down the voltage delivered by the vehicle battery to a preset voltage value.

[0015] Optionally, the MCU module uses a single-chip microcomputer model of MC9S12G128, the driving circuit uses a high-side VND7149AJ chip to drive the shifter solenoid valve, and the display module uses a low-side chip VNLD5300 to control the gear light.

[0016] By adopting the present invention, the gear position light and the background light of the automatic gear shifter can be displayed according to the gear. At the same time, automatic gear shifting can be realized by communicating with the TCU of the automobile. The gear shifter solenoid valve can be operated according to the current gear position of the automobile to lock the gear position, thereby ensuring the safety of the automobile gear shifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of an automobile automatic shifter control system provided by one embodiment of the present invention;

[0018] Figure 2 The present invention provides a circuit diagram of an automatic shifter control system for an automobile according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] Embodiment 1

[0021] refer to Figure 1 as well as Figure 2 This embodiment provides a vehicle automatic shifter control system, including:

[0022] The control module 11 is provided with an MCU processing unit 111 and a driving circuit 112. The MCU processing unit 111 is connected to the sensor module 12. The sensor module 12 collects the gear angle information of the vehicle and sends it to the MCU processing unit 111. The MCU processing unit 111 is also connected to a CAN module 13, and the gear angle information of the vehicle is sent to the TCU module 14 of the vehicle through the CAN module 13.

[0023] The display module 15 includes a gear light 151 and a background light 152. Different gears of the car correspond to different gear lights. When the car changes gears, the drive circuit 112 receives the gear shift information and controls the opening and closing of the corresponding gear light 151 according to the gear shift information. There are multiple background lights 152, which are connected to the car and are controlled to be opened and closed by a preset switch of the car.

[0024] In the present application, the automobile automatic shifter control system is a safety control system, which can be set in the automatic shifter to connect with the automobile. By collecting the shifting information of the automatic shifter and the automobile, it controls the output of corresponding functions, such as making the gear position light and the background light display according to the gear, prompting the car user and ensuring the safety of the car during the gear shifting process.

[0025] In this embodiment, the automatic shifter has multiple conventional gears, including P, N, R, S, M, S, M+, and M-. Different gears represent different current driving states of the car. This is common knowledge in the existing automotive field and is not described in detail in this embodiment.

[0026] In this embodiment, the linear Hall sensor used in the sensor module 12 can make the circuit board smaller compared with the switch Hall sensor. The entire control system is integrated on the circuit board and can be more conveniently installed in the automatic shifter, thereby improving the space utilization inside the automatic shifter.

[0027] The sensor module 12 is divided into a gear position acquisition sensor and a manual automatic switching sensor. The gear position acquisition sensor adopts the model MLX90363, and the manual automatic switching sensor adopts the model VNLD5300. It should be understood that both sensors are linear Hall sensors, but their models are different.

[0028] In this embodiment, different gears have different gear angle information, and the MCU processing unit 111 establishes communication with the automobile TCU module 14 through the CAN module 13 .

[0029] like Figure 2 As shown, in this embodiment, there are multiple gear lights and background lights, and each light corresponds to a different gear position. In this embodiment, the gear lights and the background lights are LED light sources, wherein the color of the background lights is different from the color of the gear lights, for example, the color of the background lights is white, and the color of the gear lights is red, so as to distinguish them.

[0030] In this embodiment, when the car is in P gear, the gear position light corresponding to P gear will be on, and the background light corresponding to P gear will be off, wherein the background light is controlled by the vehicle's headlight switch to turn on and off, and correspondingly, when the car is in other gear positions, other corresponding gear position lights and background lights will be turned on or off. The current of the gear position light switch cannot exceed 200mA to prevent damage caused by excessive current.

[0031] refer to Figure 2 An electronic switch is also provided in the control circuit of the automobile automatic shifter. The electronic switch is connected to the automobile. When the automobile is in the P gear, the electronic switch is opened, and when the automobile is in the non-P gear, the electronic switch is closed.

[0032] When the electronic switch is in the open state, the circuit is not conductive, and the gear light and the background light lack power supply. When the electronic switch is in the closed state, the circuit is conductive, and the vehicle provides 12V power to the gear light and the background light, thereby controlling the opening and closing of the gear light and the background light.

[0033] A control chip is provided in the driving circuit 112. In this embodiment, the MCU module uses the MC9S12G128 microcontroller, the driving circuit uses the high-side VND7149AJ chip to drive the shifter solenoid valve, and uses the low-side VNLD5300 chip to control the gear position light.

[0034] Among them, the high-side VND7149AJ chip and the low-side VNLD5300 chip in the driving circuit both have overvoltage and overcurrent protection functions. When the voltage or current is high, the output efficiency will be automatically reduced to control the current and voltage in the circuit.

[0035] In this embodiment, the CAN module 13 further includes a power module 131, and the power module 131 steps down the voltage delivered by the vehicle battery to a preset voltage value.

[0036] The power module 131 is connected to the battery power of the vehicle. In this embodiment, the voltage of the vehicle battery is 12V. The power module 131 steps down the 12V power delivered by the battery and converts it into 5V to provide input power to provide power for the CAN module 13.

[0037] In this embodiment, the control module 11 is also connected to a shift button. The control module 11 receives a pressing signal of the shift button and sends it to the TCU module 14 through the CAN module 13 .

[0038] The shift button is an S gear button. When the vehicle user needs to shift to S gear, he only needs to press the button, and the control module 11 will control the vehicle gear to change to S gear, and feed back the current gear information to the vehicle TCU module 14 through the CAN module 13. It should be understood that the shift button is an S gear button, which is a preferred embodiment. Further, the shift button can also be set to other gears, such as M+, etc.

[0039] In this embodiment, the control module 11 is also connected to a shifter solenoid valve, which receives the gear information sent by the TCU module 14 and automatically opens or closes according to the gear information.

[0040] The shifter solenoid valve is a bidirectional solenoid valve. When the gear is locked, after the TCU module 14 sends the gear information, it identifies which gear it is. If it is P gear, the solenoid valve does not work, and if it is N gear, the solenoid valve works.

[0041] In this embodiment, a diagnosis module 16 is also included. The diagnosis module 16 is used to perform regular diagnosis on the CAN module 13.

[0042] The diagnosis module 16 adopts the UDS diagnosis commonly used in automobiles according to the ISO14229 standard.

[0043] In this embodiment, the chip model used by the CAN module 13 is UJA1164TK, which can convert a 12V power supply into a 5V regulated voltage input and can also realize the function of a CAN transceiver.

[0044] By adding a control system to the automatic shifter, the gear position light and background light of the automatic shifter can be displayed according to the gear. At the same time, by communicating with the car's TCU, automatic shifting can be achieved, and the shifter solenoid valve can act according to the current gear position of the car to lock the gear, ensuring the safety of the car's gear shifting.

[0045] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A vehicle automatic shifter control system, characterized in that: include: Control module, CAN module and display module, The control module is provided with an MCU processing unit and a driving circuit, the MCU processing unit is connected to a sensor module, the sensor module collects the gear angle information of the vehicle and sends it to the MCU processing unit, the MCU processing unit is also connected to a CAN module, and the gear angle information of the vehicle is sent to the TCU module of the vehicle through the CAN module; The display module includes a gear light and a background light. Different gears of the car correspond to different gear lights. When the car shifts gears, the drive circuit receives the gear shift information and controls the opening and closing of the corresponding gear light according to the gear shift information. The background light is provided with a plurality of the background lights connected to the car, and the opening and closing of the background light is controlled by a preset switch of the car. The control module is also connected to a shifter solenoid valve, which receives the gear information sent by the TCU module and automatically opens or closes according to the gear information; The control system enables the gear position light and background light of the automatic gear shifter to be displayed according to the gear, and at the same time, through communication with the vehicle TCU, automatic gear shifting is realized, and the gear shifter solenoid valve can be operated according to the current gear position of the vehicle to lock the gear position; The system is also provided with an electronic switch, which is connected to the car. When the car is in the P gear, the electronic switch is opened, and when the car is in a non-P gear, the electronic switch is closed; The system is also provided with a diagnostic module for performing regular diagnosis on the CAN module; The sensor module adopts a linear Hall sensor, and the linear Hall sensor model is MLX90363; The control module is also connected to a shift button, and the control module receives a pressing signal of the shift button and sends it to the TCU module through the CAN module; The CAN module also includes a power module, which steps down the voltage delivered by the vehicle battery to a preset voltage value; The control module uses a single-chip microcomputer model of MC9S12G128, the drive circuit uses a high-side VND7149AJ chip to drive the shifter solenoid valve, and the drive circuit uses a low-side chip VNLD5300 to control the gear position light.

Images