A vehicle automatic transmission intelligent control system and method based on front road conditions

Abstract

The application provides a vehicle automatic gearbox intelligent control system and method based on front road conditions, and belongs to the field of vehicle driving assistance. The system components include: vehicle front road condition identification, vehicle surrounding information identification, vehicle current gear, accelerator pedal state, central control state judgment, central control voice recognition, the system detects the front road conditions by using the built-in navigation system of the central control screen, detects the vehicle surrounding information by using the ADAS camera and radar, in the case that the user steps on the accelerator and the front congestion and the current surrounding conditions of the vehicle are allowed to be identified, the automatic gearbox realizes the forward movement in the way of neutral gear or maintaining the current gear, avoids the frequent gear shifting operation of the gearbox, and reduces the wear of the gear shifting mechanism. The application can reduce the fuel consumption of the vehicle, prolong the service life of the gearbox, improve the economy, and reduce carbon emissions.

Description

Technical Field

[0001] This invention relates to an intelligent control system and method for an automatic transmission in a vehicle based on road conditions ahead, belonging to the field of vehicle driving assistance technology. Background Technology

[0002] As people's living standards continue to improve, cars have entered thousands of households. The number of cars has increased from 172 million in 2015 to 302 million in 2022. During the same period, the total mileage of highways increased by 502,900 kilometers, and the highway density increased by 5.24 kilometers per 100 square kilometers. The growth rate of cars far exceeds the growth rate of highways, causing widespread congestion.

[0003] Currently, with increasing demand for automobiles, more and more people are choosing automatic transmissions to improve driving comfort and reduce driver fatigue. At present, mainstream automatic transmissions are mainly divided into three categories: AT, CVT, and DCT / DSG, along with their derivatives. Their operating principle is that a computer automatically changes the gear ratio (fixed or continuous) through a predetermined program to achieve the goal of "no gear shifting." However, congested road conditions cause the transmission to frequently change the gear ratio, resulting in excessive wear and tear on the transmission, significantly reducing its lifespan and causing financial losses for car owners. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent control system and method for vehicle automatic transmissions based on road conditions ahead. This system is versatile, low-cost, and can reduce wear on the shifting mechanism, lower the temperature rise of the transmission mechanism, and extend the service life of the transmission.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] The system includes a central control screen, an ADAS camera, a radar sensor, an automatic transmission control unit, and an accelerator pedal. The ADAS camera, radar sensor, automatic transmission control unit, and accelerator pedal are connected to the central control screen via a gateway. The central control screen includes a CAN controller, a microcontroller unit, a system chip, a wireless module, and a GPS module. The gateway is connected to the microcontroller unit via the CAN controller, the microcontroller unit is connected to the system chip, and the system chip is also connected to the wireless module and the GPS module.

[0007] Preferably, the ADAS camera is located at the front of the vehicle, and the radar sensor is located at the edge of the vehicle chassis.

[0008] Preferably, the system chip is also connected to an audio signal digital processing unit, which is also connected to a speaker via a sound player, and the sound player is also connected to a microcontroller unit.

[0009] Preferably, the central control screen has a built-in intelligent control soft switch for the automatic transmission and a navigation system.

[0010] A method for intelligent control of a vehicle's automatic transmission based on road conditions ahead includes the following steps:

[0011] Step 1: Activate the automatic transmission intelligent control function; activate the automatic transmission intelligent control system via the soft switch on the central control screen;

[0012] Step 2: The built-in navigation system of the central control screen obtains real-time road condition information ahead and feeds this information back to the microcontroller unit of the central control screen to determine whether the current road condition is congested or smooth.

[0013] Step 3: The ADAS camera and radar sensors acquire real-time road conditions around the vehicle and send the road condition information to the microcontroller unit on the central control screen; the automatic transmission control unit sends the current gear signal to the microcontroller unit on the central control screen in real time; the accelerator pedal sends the accelerator opening to the central control screen in real time; the microcontroller unit in the central control screen determines the gear based on the received road condition information through the system chip and sends the gear signal to the automatic transmission control unit.

[0014] Step 4: When the road ahead is clear, the gear position judgment signal output by the central control screen is invalid. At this time, the automatic transmission control unit does not respond to the gear position judgment signal and switches gears based on the actual throttle signal received.

[0015] When the road ahead is congested, the gear position judgment signal output by the central control screen is valid, and the automatic transmission control unit responds to the gear position judgment signal at this time;

[0016] Preferably, the gear selection method is as follows:

[0017] The microcontroller unit in the central control screen calculates the speed of the vehicle ahead, the relative distance, and the speed of the current vehicle based on the received road condition information through the system chip. When the relative speed is greater than 0, it means that the current vehicle's speed is less than the speed of the vehicle ahead and the relative distance is relatively large. When the relative speed is equal to 0, it means that the speed of the vehicle ahead is almost the same as the current vehicle's speed and the relative distance is safe. When the relative speed is less than 0, it means that the speed of the vehicle ahead is less than the current vehicle's speed and the relative distance is relatively small.

[0018] When the road ahead is congested and the relative vehicle speed is greater than 0, the central control screen outputs a gear judgment signal, which is the current gear signal sent by the automatic transmission control unit. The transmission responds to the accelerator pedal signal while maintaining the current gear.

[0019] When the road ahead is congested and the relative vehicle speed is 0, the central control screen outputs the gear signal as the current gear signal sent by the automatic transmission control unit. At this time, the transmission responds to the accelerator pedal signal while maintaining the current gear.

[0020] When the road ahead is congested and the relative vehicle speed is less than 0, the gear position judgment signal output by the central control screen is neutral and is sent to the automatic transmission control unit via the CAN bus. At this time, the transmission maintains neutral coasting and does not respond to the accelerator pedal signal.

[0021] Preferably, the ADAS camera and radar sensor acquire real-time information on the road conditions around the vehicle, including information on the relative speed and relative distance of vehicles, pedestrians, obstacles, and vehicles in front and behind.

[0022] The advantages of this invention are as follows: This invention utilizes the navigation system built into the central control screen to detect road conditions ahead, and the ADAS system to detect road conditions ahead and information about the vehicle's surroundings. This information is then sent to the central control screen via a CAN bus. The central control screen processes these signals and the accelerator pedal signal to determine whether the vehicle is moving in the current gear or neutral, and sends the result to the TCU via the CAN bus, thus avoiding frequent gear shifting operations of the transmission. This solution utilizes the vehicle's existing control system, extracts relevant information to determine activation, has good versatility, low cost, and can reduce wear on the shifting mechanism, lower the temperature rise of the transmission mechanism, and extend the service life of the transmission. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0024] Figure 1 This is a schematic diagram of the system structure of the present invention.

[0025] In the diagram: TCU: Automatic Transmission Control Unit, CANTransceiver: CAN Controller, MCU: Microcontroller Unit, SOC: System-on-Chip, BT / WIFI Module: Wireless Module, GPS Module: GPS Module, AudioDSP: Audio Signal Digital Processing Unit, Power-AMP: Audio Player. Detailed Implementation

[0026] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] 1. Activate the automatic transmission intelligent control function;

[0028] Before driving, the user can activate the automatic transmission intelligent control function by touching the central control soft switch. At this time, the system is activated, and the central control screen sends the automatic transmission intelligent control activation signal to the ADAS camera, radar sensor and TCU through the CAN line.

[0029] 2. The central control screen monitors road conditions ahead in real time;

[0030] After the automatic transmission intelligent control function is activated, the navigation system built into the central control screen obtains real-time road condition information through the big data network and shares this information with the central control screen in real time.

[0031] 3. ADAS cameras and radar sensors acquire information about the vehicle's surroundings;

[0032] After receiving the signal from the central control screen that the automatic transmission intelligent control function is activated, the ADAS camera and radar sensor will send the real-time road condition information ahead and vehicle surrounding information, including information on vehicles, pedestrians, obstacles, relative speed and relative distance of vehicles in front and behind the vehicle, to the central control screen via the CAN line.

[0033] 4. While the vehicle is moving forward, the central control screen receives the gear signal;

[0034] While the vehicle is moving forward, the TCU sends the current gear signal to the central control screen in real time, and after the automatic transmission intelligent control function is activated, the TCU prioritizes the execution of the valid gear judgment signal received from the central control screen.

[0035] 5. The user presses the accelerator pedal while the vehicle is moving forward;

[0036] When the user presses the accelerator pedal, the accelerator pedal sends the throttle opening to the central control screen in real time via the CAN bus;

[0037] 6. The central control screen processes relevant information and determines the gear position;

[0038] The central control screen combines the road condition information detected by the navigation system with the road condition information and vehicle surrounding information obtained by the ADAS camera and radar sensors, including vehicles, pedestrians, obstacles, etc. Its internal MCU and SOC modules are processed by data analysis and algorithm verification to output a signal: the road ahead is clear or the road ahead is congested.

[0039] The central control screen receives signals such as the speed of the vehicle in front, the relative distance, and the speed of the current vehicle. After data analysis and algorithm verification, it outputs a signal of relative speed. When the relative speed is greater than 0, it means that the speed of the current vehicle is less than the speed of the vehicle in front and the relative distance is large. When the relative speed is equal to 0, it means that the speed of the vehicle in front is almost the same as that of the current vehicle and the relative distance is safe. When the relative speed is less than 0, it means that the speed of the vehicle in front is less than that of the current vehicle and the relative distance is small.

[0040] When the road ahead is clear, the gear position judgment signal output by the central control screen is invalid. At this time, the TCU does not respond to the gear position judgment signal and switches gears based on the actual throttle signal received.

[0041] When the road ahead is congested and the relative vehicle speed is greater than 0, the central control screen outputs a gear position judgment signal, which is the current gear position signal sent by the TCU. At this time, the transmission responds to the accelerator pedal signal while maintaining the current gear.

[0042] When the road ahead is congested and the relative vehicle speed is 0, the central control screen outputs the gear signal as the current gear signal sent by the TCU. At this time, the transmission responds to the accelerator pedal signal while maintaining the current gear.

[0043] When the road ahead is congested and the relative vehicle speed is less than 0, the gear position judgment signal output by the central control screen is neutral and is sent to the TCU via the CAN line. At this time, the transmission maintains neutral and does not respond to the accelerator pedal signal.

[0044] 7. Voice prompts;

[0045] When the user presses the accelerator and the vehicle is driving in the current gear or neutral, the central control screen will announce "Congestion ahead, it is recommended to slow down" to remind the user.

[0046] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for intelligent control of a vehicle's automatic transmission based on road conditions ahead, characterized in that, The method includes the following steps: Step 1: Activate the automatic transmission intelligent control function; activate the automatic transmission intelligent control system via the soft switch on the central control screen; Step 2: The built-in navigation system of the central control screen obtains real-time road condition information ahead and feeds this information back to the microcontroller unit of the central control screen to determine whether the current road condition is congested or smooth. Step 3: The ADAS camera and radar sensors acquire real-time road conditions around the vehicle and send the road condition information to the microcontroller unit on the central control screen; the automatic transmission control unit sends the current gear signal to the microcontroller unit on the central control screen in real time; the accelerator pedal sends the accelerator opening to the central control screen in real time; the microcontroller unit in the central control screen determines the gear based on the received road condition information through the system chip and sends the gear signal to the automatic transmission control unit; Step 4: When the road ahead is clear, the gear position judgment signal output by the central control screen is invalid. At this time, the automatic transmission control unit does not respond to the gear position judgment signal and switches gears based on the actual throttle signal received. When the road ahead is congested, the gear position judgment signal output by the central control screen is valid, and the automatic transmission control unit responds to the gear position judgment signal at this time; The specific method for determining the gear position is as follows: The microcontroller unit in the central control screen calculates the speed of the vehicle ahead, the relative distance, and the speed of the current vehicle based on the received road condition information through the system chip. When the relative speed is greater than 0, it means that the current vehicle's speed is less than the speed of the vehicle ahead and the relative distance is relatively large. When the relative speed is equal to 0, it means that the speed of the vehicle ahead is almost the same as the current vehicle's speed and the relative distance is safe. When the relative speed is less than 0, it means that the speed of the vehicle ahead is less than the current vehicle's speed and the relative distance is relatively small. When the road ahead is congested and the relative vehicle speed is greater than 0, the central control screen outputs a gear judgment signal, which is the current gear signal sent by the automatic transmission control unit. The transmission responds to the accelerator pedal signal while maintaining the current gear. When the road ahead is congested and the relative vehicle speed is 0, the central control screen outputs the gear signal as the current gear signal sent by the automatic transmission control unit. At this time, the transmission responds to the accelerator pedal signal while maintaining the current gear. When the road ahead is congested and the relative vehicle speed is less than 0, the gear position judgment signal output by the central control screen is neutral and is sent to the automatic transmission control unit via the CAN bus. At this time, the transmission maintains neutral coasting and does not respond to the accelerator pedal signal.

2. The intelligent control method for vehicle automatic transmission based on road conditions ahead according to claim 1, characterized in that, The ADAS camera and radar sensor acquire real-time information on the road conditions around the vehicle, including the relative speed and distance of vehicles, pedestrians, obstacles, and vehicles in front and behind.

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