Automotive electro-mechanical braking key technology research


The application of electro-mechanical braking technology can meet the requirements of energy saving and environmental protection while creating a safer platform for the development of automobiles, with information technology, automation technology and intelligent technology and other core technology solutions to provide security for the diversified development of the automotive industry.

1 Automotive electro-mechanical braking system market value

On the one hand, the application of automotive electro-mechanical braking system has greatly improved the level of energy saving in the automotive industry, fully uphold the requirements of environmental protection, in improving the control accuracy at the same time also provides a guarantee for the overall optimization of system response efficiency. It is also based on the outstanding application advantages of automotive electro-mechanical braking system, can realize the win-win goal of energy-saving and environmental benefits and economic benefits for enterprises.

On the other hand, the automobile electromechanical brake system research and development and application really promote the green environmental protection industry development process, integrate the production development mode, maintain the comprehensive application performance, create a more reasonable and standardized automobile development system, promote the comprehensive management mode of overall progress.

In summary, automotive electro-mechanical braking system has an important market value, is the core technology system to achieve the harmonious unification of multiple benefits.

2 automotive electro-mechanical brake overview

The application of automotive electro-mechanical braking system can effectively improve the level of automation control, with active cruise control module, etc., reduce the brake response time and effectively improve the overall system stability. In order to give full play to the advantages of the application of electro-mechanical braking, it is necessary to clarify its basic structure and working principle, and maintain the scientific nature of the overall system operation.

2.1 Basic structure

In the process of automotive electro-mechanical brake work, the brake pedal and brake are the two most critical basic structural units, maintaining the non-mechanical connectivity of the two in order to meet the practical application requirements of braking. At the same time, the automotive electro-mechanical brake structure will complete the program data control processing by means of electronic control, the user in the actual operation process, need to send the corresponding information data to the electro-mechanical brake system unit, with the sensor to complete the summary of instructions, so as to maintain the car to complete safe operation. Compared with the traditional hydraulic braking system using the brake for vacuum boost processing, the new EMB braking system can cooperate with the pedal feeling simulator and EMB system to complete the braking control. In addition, the automotive electro-mechanical braking system, but also need to cooperate with electronic components to achieve the processing of signals and instructions, compared with the traditional hydraulic components, which greatly improve the efficiency of the safety and application of the effect, and reduce the component space accounted for, in order to meet the basis of multiple assembly and integration, the formation of a more harmonious and efficient application of the operation of the whole, to lay a solid foundation for the optimization of the comprehensive functions and characteristics of the system. First, the brake pedal simulation equipment. Is the core component of the electro-mechanical braking system, the most basic role is to be able to cooperate with the driving operation, after the driver applies force to the pedal, the car will use the movement of the signal obtained by the sensor into electrical signals, so as to complete the purpose of signal transmission to the ECU system, after the system receives the relevant instructions, it can combine the specific content of the instructions to complete the response.

Second, the electronic controller equipment. This includes redundant ECU, CPU, output circuit, input circuit, etc. In the actual application process, the signal conversion is to be used to convert the electrical signal of the sensor into a digital signal, so as to form the corresponding response processing process and improve the application effect. At the same time, the digital signals will be summarized in the CPU to complete the matching determination and response processing to ensure the reasonableness of the electrical signal analysis and calculation process. It is worth mentioning that the processing and analysis of the calculation criteria are completed in conjunction with the working conditions, and the statistical braking force parameters are evaluated after effectively understanding the calculated values. At the same time, the electronic controller equipment can also be used to transmit the signal formed by the electronic brake directly to the console with the help of the output circuit.

Third, the sensor, divided into pedal sensor, brake sensor and wheel speed sensor, to be combined with different forms of application of the corresponding sensor for signal transmission and aggregation, effective establishment of multiple signal propagation mode, the maximum extent to improve the comprehensive level of command reception and application control.

Fourth, the electric energy braking equipment, mainly divided into disc type electric energy braking unit and drum type electric energy processing unit, in practical application, mainly with the help of the processing method of motion transformation, the torque parameters formed in the operation of the motor directly into the brake disc position, to improve the level of implementation of automotive braking. It should be noted that the space of the wheel structure of the car is limited, and the application of electrical energy braking sensor can save space based on the scientific design of the size to meet the basic needs of the application processing and create a more reasonable and effective braking processing structure on the basis of maintaining the comprehensive performance.

2.2 Working principle

After the ECU obtains the corresponding signal, it provides the corresponding braking response by combining the driver’s force parameters and conditions, and cooperates with the CAN bus distribution processing mode to effectively maintain the processing mode of different electro-mechanical brake signals to meet the goal of controlling the braking force. It is worth mentioning that with the help of the electro-mechanical brake system not only can the sensor signal be collected and processed, but also can cooperate with the actual application environment to complete the modification and arrangement of data, further improve the braking process, enhance the scientific and standardized braking force control, and minimize the hidden danger caused by bad problems. For example, in the process of automotive electro-mechanical braking, if the main control system operates abnormally, the redundant ECU will play the advantage of its backup resource processing to better maintain the safety of starting, braking and driving.

At the same time, the use of computer technology to connect the electro-mechanical braking system and traffic management system, it can better play the role of additional functional modules, with the parking brake and other basic units to improve the effect of comprehensive safety supervision, the use of automated control function module to improve the overall quality of car operation, reduce energy consumption and unsafe factors.

3 automotive electro-mechanical brake key technology

In the automotive electro-mechanical braking technology application process, different technology modules play their different roles and functions, the application of automotive electro-mechanical braking key technologies can not only improve the stability of the system, reduce the braking distance, but also optimize the level of system regulation and control to create a more harmonious and safe driving environment, together to maintain the balance of automotive electro-mechanical braking applications.

3.1 Fault-tolerant demand processing technology

Along with the continuous development of science and technology, wire electronic components can better replace the hydraulic components, and complete the backup execution technology, can optimize the fault tolerance effect at the same time, the integration of resources mode, build a more matching technology control structure. At the same time, with the help of electro-mechanical braking key technology can also establish fault-tolerant system, improve the reliability and safety of the overall structure.

On the one hand, the electronic control element using fault-tolerant demand processing technology can quickly carry out the start-up of the backup device, maintain its operating state, and timely avoid the problems arising from the abnormal operation of the electronic control element.

On the other hand, fault-tolerant demand processing technology can also develop a more scientific and reasonable fault tolerance range, technical operators in the process of referencing the electronic mechanical braking system, with fault-tolerant processing technology module, the important information to be backed up processing, with the sensor information control to ensure the standardization of information and data application, but also to maximize the rationality of instructions.

Because the electromechanical braking system supports fault-tolerant processing function, so, in the process of applying the technology mode, to cooperate with the communication protocol to further promote the upgrading and development of technology application.

3.2 Interference signal processing technology

In the process of driving the car, there are more sources of interference signals, in order to avoid the impact of interference signals on the safety of car operation, it is necessary to combine the application specifications of the automotive electro-mechanical braking system, analyze the different interference characteristics, and establish a matching application mode using symmetric control system and asymmetric control system.

One, symmetrical control system, can be applied to the same nature of the CPU braking signal and calculation program braking signal acquisition and processing work, to ensure the optimal signal application control, and reduce the signal redundancy and signal interference generated by the adverse effects.

Second, the asymmetric control system, mainly combined with component-based design analysis, the collection and classification of braking signals for CPUs of different nature, to complete the matching processing mode.

Third, on the basis of the continuous development of electro-mechanical braking technology, technicians want to improve the application of software and hardware, we must combine the vehicle configuration standards and specific requirements, the implementation of a more reasonable brake processing mode. In the anti-interference technology system application at the same time, the navigation technology, steering technology and brake processing technology integration together, with the algorithm to establish the parts management mode, to meet the data bus system control application standards on the basis of the braking system operating stability and security to provide security.

3.3 Actuator energy control technology

For the automotive electro-mechanical braking system, in order to play its practical role and application advantages and better enhance the stability of the car operation, it is necessary to match the adequate electrical energy structure and maintain the reasonableness and timeliness of the electrical energy supply. Combined with the relevant data, it can be seen that the traditional 12V automotive electrical system can no longer meet the actual application requirements, and the traditional control system is gradually developing in the direction of 42V high-performance voltage system is an inevitable trend.

On the one hand, the actuator energy control technology can effectively reduce the problem of poor safety performance caused by high voltage, create a more reasonable and scientific application platform, reasonably regulate the energy module and ensure that the resource utilization rate meets the actual operating requirements. On the other hand, the technical personnel in the electromechanical braking key technology application upgrade at the same time, but also the actuator energy control mode to optimize the standard, matching the complete application of standards, in order to restrain the mechanism of integrated management at the same time, the advantages of technology.

In addition, the standard of the brake actuator equipment is also the key to the application of control technology, the technical staff should combine the standard and optimization requirements to select cost-effective, size, etc. to meet the actual standard requirements of the semiconductor, combined with the application environment of the brake actuator equipment, requiring it to have high temperature resistance characteristics, so as to optimize the effect of energy control technology applications.

4 Conclusion

In conclusion, on the basis of the continuous progress and development of science and technology, the automotive industry should improve the comprehensive level of the application of electro-mechanical braking system on the basis of integrated technology and modular technology, comprehensively strengthen the research and development efforts and application level, and lay the foundation for the sustainable and healthy development of the automotive industry.

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