Taking wet clutch as the research object, through theoretical calculation of coupling steel temperature of clutch, the clutch torsional and convective heat transfer coefficients are estimated by establishing the clutch torsional thermodynamic model. The main factors affecting the accuracy of calculation are extracted, and a physical model for dynamic measurement of steel sheet temperature is developed for key factors. Based on the measured results, the distribution law of axial temperature field of different steel plates is analyzed, the cooling oil passage of the clutch is optimized, the maximum temperature difference of different steel plates is reduced by 74.6%, which effectively improves the transmission torque of the clutch. At the same time, the clutch temperature model in-depth calibration under different oil temperature, torque and speed difference is carried out, which realizes the precise torque transfer ability of the transfer case while still secures the function of reliable thermal protection function.

The strategic objectives of "carbon peaking" and "carbon neutrality" have brought significant challenges for reducing carbon emissions from passenger cars. Therefore, formulating a technical route for carbon reduction in passenger vehicles is a crucial task for the future sustainable development of the automotive industry. Firstly, it involves analyzing data on new passenger car production, stock and scrap rate up to 2060, as well as carbon intensity data of electricity industry. Subsequently, the carbon emission data from various power sources for passenger cars is compiled. An analysis model is then established, along with evaluation dimensions and indicators, to assess passenger cars with different power sources. Finally, the analysis focuses on the sensitivity of individual power technologies in reducing carbon emissions. The findings indicate that pure electric vehicles (EVs), plug-in hybrids (PHEVs), and hybrid electric vehicles (HEVs) play a pivotal role in rapidly reducing carbon emissions to achieve "carbon peaking". Additionally, carbon-neutral fuel power and fuel cell vehicle technologies demonstrate advantages in achieving "carbon neutrality". In conclusion, achieving "carbon peaking" and "carbon neutrality" in powertrains requires a combination of multi-source technology pathways within specific timeframes for implementation. Furthermore, transitioning policies and regulations from "double credit" to"carbon credit" based on technology neutrality is essential to realize the dual-carbon technical route for passenger cars.

To address the lack of effective monitoring and fault tolerance mechanisms in the service-oriented AUTOSAR Adaptive Platform (AP) and to ensure high stability and safety of the software system in case of faults, this study takes the automotive basic software platform AP as the research object. A complete monitoring and fault tolerance mechanism is designed through the Automated Valet Parking (AVP) software system. By analyzing traditional software architectures, other service-oriented architecture monitoring solutions, and the characteristics of AP, a monitoring scheme for AP is designed to supervise the platform infrastructure (processors, networks, memory) and service states (response times). A data display module developed with Qt, using the LT protocol, implements the collection and display of real-time monitoring data. Furthermore, a service call chain tracing method supporting the SOME/IP protocol is proposed, enabling analysis of complex service call relationships within service-oriented architectures. The results indicate that the scheme can monitor and analyze service failures within the AVP software system and implement fault tolerance mechanisms in case of failures, thus enhancing system reliability.

The Intelligent and Connected Vehicle (ICV) is a key field of innovation and development of domestic and international technology industry, and has become a major strategic direction of global automobile industry development. Taking the policy management and industrial layout of Japan’s intelligent connected vehicle industry in the past 10 years as the research object, the study summarizes the functions and responsibilities of the various management departments, the layout of the industrial structure and the level of technological development of Japan’s intelligent connected vehicle industry, and makes predictions on its future development focusing on trends by comparing the development progress of different applicable fields of its smart Internet-connected vehicles and taking the current social conditions of Japan as the reference object. It also proposes suggestions for the development of China’s intelligent connected vehicle industry.

This paper aims to study the causes, key influencing factors, and failure modes of fire accidents in new energy passenger vehicles from a holistic perspective, and to supplement the causes of fire accidents beyond battery-related issues based on user usage scenarios, and identify preventive solutions. In this paper, an in-depth statistical analysis is conducted on fire accidents involving new energy vehicles from 2021 to 2022. The user scenarios and the root causes of these fire accidents are summarized. The failure modes at a deeper level and the causes of some typical accident cases are analyzed. The prevention of fire accidents at the design level is discussed. Several solutions are provided, and discussions are held on the research direction of vehicle safety for new energy vehicles.

In order to trace the source of volatile organic compounds ( VOCs ) of a vehicle, 10 vehicles with the same configuration are tested for volatile organic compounds ( VOC ), and the volatile characteristics of vehicle VOC are discussed. The VOC test is carried out on the 16 types, configuration and process consistent parts and their raw materials in the sample vehicle. The traceability analysis of the test results is carried out to identify the parts and their raw materials that contribute greatly to the VOC content in the vehicle, and provide data support for improving the air quality in the vehicle.

With the rapid development of New Energy Vehicle (NEV), power batteries have also realized large-scale development and application. The fast development of power batteries has caused the shortage of battery resources, excessive energy consumption, and the battery scrap has had a negative impact on the environment as well. The green design of power battery products is an effective method to solve the issue of this series. By reviewing many literatures, the evaluation methods and green design methods of green design are analyzed, and the current status and development of green design of power batteries are analyzed and summarized. The results show that compared with passive green design strategy, the active green design strategy of power battery has better economy, higher resource utilization and lower energy consumption, and has more development potential.

The P2 hybrid system is a mainstream technical solution to realize eletrifcation for traditional longitudinal vehicles, with the advantages of low fuel consumption and long driving range. This paper combines the vehicle simulation analysis and big data statistics of different vehicle working conditions to compare the working characteristics of the P2 hybrid system and the fuel saving effect under different driving conditions so as to provide some references for the development of P2 hybrid system. The fuel efficiency of P2 hybrid vehicles is closely related to the actual driving conditions of users compared to traditional fuel vehicles, and has obvious fuel saving advantages in urban congested road conditions. However, the P2 hybrid system has a higher cost and does not have an advantage in terms of user usage cost.

This article analyzes domestic policies and standards in depth, summarizes typical scenarios in testing requirements, explores process planning methods for intelligent networking test sites based on the development of existing products at both ends of the vehicle and road, analyzes component elements such as scenario layout, test zoning, and road type, and provides technical ideas and planning references for the planning and construction of intelligent networking test sites.

In order to solve the problem that the lithium-ion batteries’ charging capacity decreases in cold environments, this paper analyzes the low temperature charging methods of lithium-ion batteries, and studies the impact of the differences in charging methods of lithium-ion batteries for pure electric vehicles at low temperatures on the battery temperature rise rate, and puts forward suggestions on improving the low temperature charging rate of batteries and the low temperature charging capacity of pure electric vehicles.