Vehicle dynamic control
The abbreviation of Vehicle Dynamics Cotrol is VDC, and the function of this system is to keep the stability of the car during driving (including braking and driving). Traditional ABS (Anti-lock Braking System) and TCS (Traction Control System) mainly control the braking force and driving force on the wheel to prevent the longitudinal slip rate of the wheel from being too large, so as to obtain the maximum adhesion, which can not only produce the maximum deceleration (acceleration), but also prevent side slip.
Although the vehicle dynamic control system also controls the braking force and the driving of the wheels
Power, but they are very different from ABS/TCS. Their main performance is that they can realize the differential control of the left and right longitudinal forces, thus directly providing the yaw moment to the automobile to offset the unstable movement of the automobile (such as the correction effect when swinging the tail on the wet road). The system detects the vehicle motion posture such as speed, angular velocity and steering wheel angle through various sensors installed on the vehicle, actively brakes one wheel as needed, changes the vehicle motion state, enables the vehicle to achieve the best driving state and handling performance, and increases the adhesion of the wheels and the handling stability of the vehicle.
Intelligent speed control system The function of intelligent speed control system of automobile is to impose mandatory speed limit on some special road sections or special driving conditions. Automobile intelligent speed control system is mainly composed of electronic control unit and actuator. When the control system works, it is necessary to set the limit speed first. For example, if the speed limit in a certain area is 80km/h, we can set the speed as the speed limit. When the vehicle speed does not reach 80km/h, the automobile intelligent speed control system does not work. When the vehicle speed approaches 80km/h, the electronic control unit starts.
The actuator limits the stroke of the accelerator pedal, so that the car cannot continue to accelerate. When the vehicle speed is lower than 80km/h, the ECU releases the control of the actuator, and the driver can freely step on the accelerator pedal to accelerate the vehicle.
The speed limit value of intelligent speed control system can be set by selecting switch or receiving wireless signal (i.e. switching speed wireless signal or switching electronic map signal): only one value can be set, and multiple gears can be set according to different road conditions.
Intelligent speed control system lays the foundation for intelligent transportation. For example, if a speed-limiting wireless signal transmission system is installed on the expressway, the traffic management department can adjust the speed limit in time according to the climatic conditions and road conditions to make the road safer and smoother.
Smart tire
The function of automobile intelligent tire is to warn the driver in time to prevent accidents when the temperature is too high or the tire pressure is too low when the automobile is driving normally. Or keep the tires in the best driving state under different driving conditions, and improve the safety factor. Smart tires generally realize intelligence by embedding a special sensor with a computer chip in the outer tire. The sensor is controlled by the transceiver in the car. The transceiver uses a radio antenna to transmit radio signals to the sensor chip, and then the sensor chip transmits electronic signals carrying temperature and pressure data to the transceiver in the car. After receiving the signal, the transceiver can obtain data such as temperature and pressure, and alarm in time if there is any abnormality.
More advanced smart tires can also perceive smooth ice, and automatically soften the tires after detecting icy roads, increasing the adhesion between tires and roads; After detecting that the road surface is slippery, it can even automatically change the tire pattern to prevent slipping.
smart glass
There are many kinds of smart car glass, including light-proof and rain-proof glass, electric snowmelt glass, image display glass, shatterproof safety glass, dimming glass, photoelectric sunshade ceiling glass and so on. The light-proof and rain-proof glass is made of new materials and new surface treatment methods. When the rain falls on the glass, it will flow away quickly, leaving no water droplets and not needing a wiper to wipe it. The reflectivity of the inner surface of the glass is low, so ornaments such as instrument panel will not be reflected on the windshield and will not interfere with the driver's sight. The glass with image display function is on the windshield.
A certain part of the dashboard is coated with a transparent reflective film, and the images and data on the dashboard from the projector can be displayed on the film as needed, which is convenient for the driver to observe, and the driver does not need to look down at the instrument when driving. If the image display smart glass cooperates with the infrared image display system, the driver can see the object about 2 kilometers ahead in foggy days. Photoelectric sunshade roof glass can automatically absorb, accumulate and use solar energy to drive the fan in the car when the car is driving or parking, and can also continuously charge the car battery.
Intelligent airbag
Automobile intelligent airbag is realized by adding some sensors on the basis of ordinary airbag and improving the program of airbag electronic control unit. The added occupant mass sensor can sense whether the occupant on the seat is an adult or a child; The infrared sensor can detect whether there are people or objects on the seat; Ultrasonic sensors can detect the presence and location of passengers. Electronic control of airbag
A single unit can timely adjust the inflation timing, inflation direction, inflation speed and inflation degree of the airbag according to the height, weight, position, whether to wear a seat belt, collision speed and collision degree of the automobile, so that the airbag can provide the most reasonable and effective protection for passengers.
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In the eyes of automobile manufacturers, the future cars will be self-driving cars, which can guide drivers to avoid traffic jams and accidents and provide rich online accommodation and entertainment. According to the investigation report of California Institute of International Automobile Economics, the next phase of automobile sales will start with smart cars. Smart cars should have the following main functions.
Night vision function: This technology originated from military equipment and appeared in the mid-1980s. Its practical application history is at least 10 years. This car is equipped with an infrared camera, which can help the driver to see clearly what is beyond the range of headlights.
The device takes the heat emitted by cars, animals and pedestrians as the signal recognized by the computer.
Voice control technology: it allows the driver to give voice instructions to the car and control the radio, telephone and temperature in the car. Voice control technology will become the key to access the network and other automation services.
Satellite phone system: drivers can talk to others by pressing buttons. The system is mainly used for emergency rescue service. The difference between it and the current navigation system is that it can reach the 4-hour telegraph center through the mobile phone connection in the car. With the help of GPS, the operator knows your current exact location. According to statistics, the system will become the standard equipment of automobiles.
High-speed pedal: The driver can pedal at high speed according to his height and the most suitable sitting position. Ford Motor Company has started to provide high-speed pedals in several models this year.
In-vehicle network system: As of April this year, at least six automobile manufacturers have provided the market with supporting equipment that can access the Internet in vehicles. General motors has tried Onstar system in cars. Just press a key and say Onstar, and the system will dial a mobile phone to connect to the server. Then you can use voice commands to broadcast weather forecasts, news, sports and traffic conditions, or send emails. What makes drivers happier is that, due to the widespread use of network appliances, you can instruct the microwave oven at home to start working in the car, and you can have a full meal as soon as you get home.
Automatic door: If you lose your key, it doesn't matter, it may be out of date soon. Mercedes-Benz is developing an electronic unlocking system, which can automatically identify the owner when he approaches the door. The owner only needs to carry an electronic device with him to activate the system. The door can be unlocked automatically when the owner touches the handle.
Automatic navigation: When you drive and travel long distances, you don't have to worry about the direction and path. Pre-input instructions will ensure that the car follows the best route. The system also keeps the car at a safe distance from the vehicle in front by radar, and rear-end collision will not happen even in foggy days. Such systems have appeared in Mercedes-Benz and Jaguar cars.
Green energy: Smart cars in the future will use green energy. Among them, electric vehicles will be widely accepted by consumers. General Motors, Ford, Volkswagen, DaimlerChrysler, Toyota, Honda and other automobile manufacturers are actively developing small electric vehicles that can be charged by radio technology. The electric energy will be converted into a special laser beam or microwave beam, which will be received by the antenna. People can drive around the world without stopping to refuel.