ECU introduction

1. What is? ECU

        ECU（Electronic Control Unit） Electronic control unit , By microcontroller （MCU）、 Memory （ROM、RAM）、 Input / Output interface （I/O）、 A / D converter （A/D） And plastic surgery 、 Drivers and other LSI components .

         Their purpose is to control the driving state of the car and realize its various functions . Mainly using various sensors 、 Data acquisition and exchange of bus , To judge the vehicle state and the driver's intention, and control the car through the actuator .

         In some medium and high-grade cars , Not only in engine applications ECU, It can be found in many other places ECU The trace of . For example, the anti lock braking system is equipped with its own ECU. With the improvement of vehicle electronization and Automation ,ECU Will be increasing , The circuit will become increasingly complex . In order to simplify the circuit and reduce the cost , Multiple in the car ECU The information transmission between them requires a technology called multiplexing communication network , Put the whole vehicle ECU Form a network system , That is to say CAN data bus , each ECU Realize the interconnection in the vehicle through LAN technology , various ECU Information sharing between .

2. What's on the car ECU

         Today, ECU It has become one of the most common parts in cars , It can be divided into different types according to different functions . The most common are the following ECU：

        EMS（Engine Mangement System） Engine management system , Applications include gasoline engines PFI（ Here's the picture ）、GDI, The diesel engine , Hybrid system, etc , It mainly controls the fuel injection of the engine 、 ignition 、 Torque distribution and other functions .

        TCU（Transmision Control Unit） Automatic transmission control unit , Commonly used in AMT、AT、DCT、CVT Wait for automatic transmission , Adopt different gear strategies according to the driving state of the vehicle .

        BCM（Body Control Module） Body control module , It mainly controls body electrical appliances , For example, vehicle lamps 、 Wiper 、 wash 、 Door lock 、 electrically-operated window 、 skylight 、 Electric rearview mirror 、 Remote control, etc .

        ESP（Electronic Stability Program） Body electronic stability control system , Body electronic stability control system .ESP It can maintain the best stability of the vehicle under various conditions , The effect is more obvious in the case of oversteer or understeer .ESP It is the special name of BOSCH company , For example, Nissan's vehicle driving dynamics adjustment system VDC（Vehicle Dynamic Control ）, Toyota's vehicle stability control system VSC（Vehicle Stability Control ）, Honda's vehicle stability control system VSA（Vehicle Stability Assist Control）, BMW's dynamic stability control system DSC（Dynamic Stability Control ） etc. . Nowadays, many medium and high-end joint ventures 、 Domestic cars will be equipped with this module .

        BMS（Battery Management System） Battery management system , As the name suggests, this controller is specially prepared for electric vehicles or hybrid electric vehicles equipped with power batteries . The main function is to improve the utilization of battery , Prevent over charging and over discharging of battery , Extend battery life , Monitor the state of the battery .

        VCU（Vehicle Control Unit） Vehicle controller , For hybrid / Assembly controller of pure electric vehicle powertrain , Be responsible for coordinating the engine 、 Drive motor 、 transmission 、 Work of power battery and other components , Improve the economy of new energy vehicles 、 dynamic 、 Safety and reduce emission pollution .

3. Well known at home and abroad ECU supplier ：

（1）BOSCH Bosch （ Virtue ）

         Bosch Group is the world's largest automotive technology supplier , Among them, the business scope of automobile and intelligent transportation covers gasoline system 、 Diesel system 、 Automobile chassis control system 、 Automotive electronic drive 、 Starter, generator, etc .

（2）Continental mainland （ Virtue ）

        2007 In, the European Commission approved continental to acquire Siemens VDO, Since then Siemens VDO Of ECU The business belongs to the mainland , This also makes continental group one of the top five auto parts suppliers in the world . Continental's business covers braking systems 、 Powertrain and chassis systems and components 、 Meter 、 Infotainment system 、 Automotive electronics 、 Tyres and industrial rubber products .

（3）Valeo Valeo

         Valeo group （Valeo） Is a company headquartered in France specializing in auto parts 、 System 、 Module design 、 Development 、 Industrial groups that produce and sell . The business of the company involves the original supporting business and after-sales business , It is the world's leading supplier of auto parts , Provide supporting facilities for all major automobile factories in the world .