In automobiles, electronic control components can be connected into a local area network through the CAN protocol for information transmission. The in-car entertainment system plays an important role in interacting with users among these electronic components. In order to meet the users’ ecological needs and provide a friendly interface operation experience, the Android system has been introduced into the in-car entertainment system. This study mainly explores the implementation of accessing the CAN network through Android applications using the Model-View-Controller (MVC), Model-View-Presenter (MVP), and Model-View-View Model (MVVM) design patterns, and compares these 3 design patterns to analyze their advantages and disadvantages in accessing the CAN network. Ultimately, it concludes that the MVVM design pattern is more suitable for the application of accessing the CAN network in the In-Vehicle Infotainment system.

The audio system is the core component of the vehicle’s active sound design and active noise reduction. In order to analyze the acoustic characteristics of audio system, it is necessary to use simulation to study its frequency response and the propagation characteristics of the sound field in the vehicle. Due to the wide frequency coverage of the frequency response, full band coverage cannot be achieved using a single simulation method. Traditional sound field simulation can only cover the frequency band below 1 000 Hz by using finite element methods. To solve this problem, Ray-tracing method commonly used in architectural acoustics was introduced into this study. The scope of application of ray-tracing method applicable to the sound field in the vehicle was discussed. Finally, the audio system was modeled and analyzed based on the ray-tracing method, the influencing factors of the results were analyzed. It is pointed out that factors such as high frequency leakage, sound transmission of glass and sound source directivity affect the simulation results.

In order to improve driving safety and driving comfort, the technologies of replacing traditional rear-view mirrors with electronic rear-view mirrors or camera monitor systems are sorted out, and the requirements of relevant domestic and foreign laws and standards on camera and monitor parameter design are analyzed. The research status of the monitor in terms of size, angle and position design is summarized. Moreover, the results of the actual car-following test and the simulated driving test are analyzed, and the evaluation indicators in the test are compared, including the physiological performance of the driver in the process of completing the driving task. Considering the subjective scores of drivers, the evaluation system under different test conditions is analyzed. This thesis provides feasible evaluation methods for camera monitor system application.

Membrane electrode frames are important part of membrane electrodes. With the development of fuel cells, membrane electrode frames have received increasing attention. The materials used in the current frame are summarized, the structures of the membrane electrode frames are classified according to the number of layers of the frames and packaging method of each frame structure is described. The physical properties of different frame materials are compared, the reasons why Polyethylene Naphthalate Two Formic Acid Glycol ester (PEN) materials has become the mainstream are analyzed, and the durability of different adhesive layers of the frames is tested. The test results show that the pressure sensitive adhesive layer has better durability.

As the main load-bearing component of the traction battery assembly, the structural strength of the battery box has a critical impact on the reliability of the traction battery system. This paper analyzes the battery box of a pure electric passenger car and uses finite element analysis method to analyze the modal and structural strength of the battery box. Improvement suggestions are formulated, and bench tests are completed to verify the improvement plan. For the development of battery boxes, through preliminary design optimization and finite element analysis methods, this paper analyzes the modal and structural strength of the battery box care to achieve rapid iteration of product plans, so as to reduce test risks and ensure the structural reliability of traction battery products.

Product audit is a quality management tool, based on the customer’s perspective to independently evaluate products, with promoting enterprise quality improvement and satisfying customer. In the process of product audit, different types of defects have different influences on customers and the superposition of various type defects interferes with quality analysis and promotion to some extent. In order to solve these problems, based on the passenger car field, this paper establishes the three-level quality features of the vehicle, and uses the fuzzy comprehensive evaluation method to carry out comprehensive calculation and evaluation of the three-level quality features with the evaluation results obtained. The evaluation results are consistent with the subjective feelings of the audit experts and have a certain scientific nature, which provides a theoretical basis for the work related to product audit.

As an important product of road freight transportation informatization, the application of network freight platform is one of the important ways to help the road freight industry achieve carbon reduction. Based on the investigation and analysis of the carbon reduction status of many network freight enterprises in China and abroad, it is concluded that the integration of logistics resources, replacement of new energy vehicles, deployment of carbon emission management system, and enterprise management carbon reduction are important ways to reduce the carbon emission of road freight. Among them, the integration of logistics resources and the replacement of new energy vehicles have great potential to develop Chinese Certified Emission Reduction (CCER) projects. At present, there is no unified calculation method for carbon emission reduction in China’s road freight industry, the development of a set of methodologies applicable to the CCER trading market at this stage can serve as a good support for the development of carbon reduction projects in the network freight platform under the CCER system.

The development of battery replacement heavy truck has been a main way to promoting new energy heavy trucks in recent years. Battery-swapping stations provide battery-swapping and recharging services for heavy trucks. The operation economy of battery-swapping stations is directly related to whether the battery replacement heavy trucks can be developed on a large scale in future. This paper mainly establishes the economy calculation model and analyzes the operation economy of battery-swapping stations in 5 short transportation scenarios. The operation economy of battery swapping stations is closely related to the annual battery-swapping electricity. In order to ensure the profit of battery-swapping operation enterprises, it is necessary to focus on the scale and monthly mileage of the heavy trucks fleet under the target application scenarios.

To improve the lateral control accuracy of autonomous vehicles in port scenarios, a closed-loop control algorithm with segmented optimal control is proposed, based on the response characteristics of solenoid valve of hydraulic steering system. The function of single axle steering, double axle steering and crab steering is realized. Moreover, the function and performance of the designed control algorithm have been verified by vehicle validation. The results show that the proposed control algorithm can realize fast and stable tracking of the hydraulic steering signal, and can support the lateral control function of the port autonomous vehicle.

With the energy and environmental problems becoming increasingly prominent, automobile lightweight as an effective energy-saving and emission reduction technology has become an important development trend in the global automotive industry. This paper elaborates the kinds of aluminum alloys commonly applied in automobile manufacturing, and systematically analyses the weldability of Al/Al and Al/steel. This paper summarizes the advanced joining technologies for aluminum alloy body manufacturing, including resistance spot welding, arc welding, laser welding, friction stir welding, flow drill screw driving, self-piercing riveting, clinching and glue joint. The application status, advantages and disadvantages of aluminum alloy joining technologies are summarized, and the future development trend is prospected.