Foreword
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With the rapid development of electronic technology, sensor technology and computer technology, automotive electronic control technology is more mature and perfect, and has been widely used in vehicles. Many electronic devices have become standard or optional configurations. Hyundai Motor has adopted automotive electronic control technology to improve vehicle power, economy, safety, comfort, and reduce emissions. Automotive electronic control technology is an important trend and sign of the development of modern automotive technology, from engine fuel injection, ignition control, intake control, emission control, fault self-diagnosis to the drive system of the chassis, steering and braking systems, as well as body and auxiliary Automotive electronic control technology is widely used in devices and the like.
Below we understand the application of automotive electronic control technology in automobiles from three aspects: the superiority of automotive electronic control technology, the composition of automotive electronic control system and the automotive electronic control system applied to automotive electronic control technology.
First, the superiority of the application of automotive electronic control technology
Reduce car repair time: self-diagnostic system
Fuel saving: electronically controlled ignition device, electronically controlled gasoline injection and mixed gas concentration control device, closed cylinder control fuel saving device, idle speed control, exhaust gas recirculation control, knock control
Reduce air pollution: sensor-controlled air-fuel ratio closed-loop control system
Reduce traffic accidents: electronic devices that prevent drunk driving and driver sleep, electronic devices that check people's mental state and reaction time, electronic control anti-skid devices, intelligent driving information systems, car main parameter alarm devices and airbags
Improve ride comfort: ride comfort, noise control, air temperature and humidity adjustment, and dwelling control
Second, the application of automotive electronic control technology system components
Detection feedback unit:
The function is to detect controlled parameters or other intermediate variables through various sensors, which are amplified, converted to display or used as feedback signals.
Command and signal processing unit:
It accepts man-machine dialogue random commands or fixed values, program instructions, and accepts feedback signals. It generally has signal processing, transformation, calculation, logic and other processing functions. Traditional instruction and signal processing units mostly use analog circuits. With the development of microelectronics and computer technology, the possibility of using digital computer instructions and signal processing units for engineering control systems is provided. The command and signal processing units used in automobiles are mostly microprocessors.
Conversion amplification unit:
The function is to convert and linearly amplify the command signals in different ways, so that the amplified power is sufficient to control the actuator and drive the controlled object.
Actuator:
The actuator directly drives the components of the controlled object, which may be electromagnetic components such as electromagnets, motors, etc., or hydraulic or pneumatic components such as hydraulic or pneumatic cylinders and motors. In order to match the driving characteristics with the load characteristics of the controlled object, a shifting mechanism such as a combination of a hydraulic motor and a planetary gear transmission may be additionally provided.
Power source:
Energy is supplied to each unit, usually including electric power sources and fluid power sources.
3. Introduction to automotive electronic control system using automotive electronic control technology
Central control system for engine and power transmission: including centralized engine control system, automatic shift control system, anti-lock braking and traction control system; electronically controlled ignition (ESA), electronically controlled gasoline injection (EFI), exhaust gas recirculation control (EGR), Idle Speed ​​Control (ISC).
Chassis integrated control and safety system: including vehicle stability control system, active body attitude control system, cruise control system, anti-collision warning system, driver intelligent support system, etc.; electronically controlled automatic transmission (ECT), anti-lock braking ( ABS), traction control (TCS), drive anti-skid (ASR) and vehicle lateral stability control system (VSC), electronically controlled suspension (TEMS), cruise control system (CCS), airbag (SRS), radar collision avoidance system, Drive anti-skid control system (ASR), seat belt control system, headlight control system.
Intelligent body electronics system: automatic adjustment seat system, intelligent headlight system, car night vision system, electronic door lock and anti-theft system;
Communication and information/entertainment system: including intelligent car navigation system, voice recognition system, "ON STAR" system (with automatic call and inquiry function), car maintenance data transmission system, car audio system, real-time traffic information consultation system, dynamic vehicle Tracking and management systems, information service systems (including networks, etc.); information display and alarm systems, language information systems, vehicle navigation systems and positioning systems, communication systems.
Conclusion
Joining the WTO will bring a huge impact to the Chinese auto industry, making the situation even more severe, but it also brings opportunities for development. With the development of domestic automotive electronic control technology and the introduction, digestion and absorption of advanced foreign technology, the level of Chinese automotive electronic control technology has been greatly improved. The development of semiconductor technology, especially integrated circuits (ICs) and large-scale integrated circuits (LSIs) and very large scale integrated circuits (VLSIs), has enabled electronic components to transition to functional blocks and microcomputers, rapidly driving the development of automotive electronic control technology. The maturity of embedded systems, local area network CAN (Controller Area Network) and data bus DB (Data Bus) technology has turned the original single project automotive electronic control system into a multifunctional integrated control system. Networking is the development direction of future vehicles, namely, network vehicles that integrate engine control, chassis control, body control, and safety, communication, and entertainment.
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