Technologies of Hybrid Electric Vehicle (HEV) are key part of technologies for automotives to realize fuel saving targets for 2025 and 2030, therefore it is essential to comb the technologies and obtain deep insight in HEV.Based on the study of the whole life cycle carbon emission management, the direction of energy-saving vehicle hybrid technology is proposed. Combined with the latest research results of the industry, this paper aims to sum up the vehicle fuel consumption reduction target and realization technology path. In the process of vehicle fuel saving analysis, through the establishment of P2.5 single-motor hybrid, series dual-motor hybrid, single-gear hybrid dual-motor hybrid and planetary hybrid dual-motor hybrid mainstream application scheme hybrid model, the fuel saving effect of each special hybrid transmission scheme is obtained. According to the actual hybrid special engine models with different thermal efficiency, the relationship equation between engine thermal efficiency and vehicle fuel consumption is established, and then the energy-saving vehicle technology scheme meeting 2025 and 2030 is obtained so as to provide a reference for the selection of vehicle technology scheme.

In order to realize carbon neutrality of automotive engine, a new methanol engine concept and framework with the master cylinder and auxiliary cylinder working cooperated with each other is proposed, it integrates internal combustion Rankin cycle, charge transit between cylinders, store energy in gas and fuel reforming technologies. The literature research method is used to analyze the thermo-chemical reforming process of methanol in the activated atmosphere of exhaust gas. With internal Exhaust Gas Recirculation (EGR), the methanol is reformed to H₂, CO and CH₄ in the main cylinder to realize the mixture combusts in fusion of methanol and hydrogen. At the same time, the heat of exhaust gas, absorbed by the methanol, is converted into methanol combustion energy. The exhaust gas of the master cylinder is introduced into the auxiliary cylinder to continue combusting. The auxiliary cylinder not only continues the combusting of the master cylinder, but also acts as the post processor of the master cylinder combustion，and the combustion energy is recycled in multiple stages, so as to achieve efficient and clean combusting of the engine.

Intelligence, networking and electrification have become the strategic direction for the development of the global automotive industry. In order to adapt to the new three transformation of the automobile industry，and solve the new problems arising from battery safety, hardware safety, software safety, data safety, and modification safety during the service of intelligent electric vehicles. This paper analyzes and identifies the risks in 5 fields of intelligent electric vehicles, as battery, hardware, software, data, and modification through literature research, expert interviews, enterprise research and other methods. Based on risk analysis, 5 aspects for health management suggestions are proposed, which is government management, standards formulation, technology and equipment development, personnel training, and inspection organization upgrading.

As an important part of automated driving vehicles, trajectory planning is the key to affecting the level of unmanned intelligence. The trajectory planning methods of automated driving vehicles in the past 10 years are summarized and classified into 5 categories: graph search, sampling, mathematical optimization, curve interpolation and machine learning. Each kind of algorithm is described in detail, the application of the algorithm in the actual scene is elaborated and its advantages and disadvantages are analyzed. Finally, the existing problems and challenges are pointed out, and the future research directions are briefly analyzed.

Thermal management is one of the key technologies of Proton Exchange Membrane Fuel Cell (PEMFC) vehicles, which affects the power performance, fuel ecomomy, safety and life of the vehicle. In view of the shortcomings of the traditional thermal management control strategy (on-off strategy), this paper proposes to maintain the inlet and outlet water temperature of the fuel cell system at the target value by controlling the fuel cell thermostat opening and fan speed. The multi-fan speed distribution strategy and control strategy of over temperature treatment, together with PID realize the rapid response of the thermal management system of the fuel cell system. The results show that, compared with the traditional on-off strategy, the optimized PID adaptive regulation strategy can quickly respond to the target operating temperature requirements of the fuel cell system, and enable the fuel cell to run at higher power under extreme working conditions. The battery system and vehicle performance have been greatly improved.

With the increasing level of vehicle automation, there is a growing demand for vehicles to autonomously perform obstacle avoidance in the field of autonomous driving. Therefore, to accurately, safely, and reasonably plan obstacle avoidance routes has become an important research direction in the field of automated driving. This paper elaborates the current research status of local path planning algorithms and their limitations in practical applications. Furthermore, the research status of improved path planning algorithms based on artificial potential field and sampling methods are reviewed in response to these limitations. The results show that this improved path planning algorithm performs well in experiments or practical applications and the path planning effect of multi-algorithm fusion is better than that of single algorithm in the future.

With the rapid development of domestic economy, there are more and more heavy duty trucks in China. However, the blind area of heavy duty trucks caused a great loss of accidents, among which the right turn blind area is main reason for the accident. In order to reduce the accidnets caused by right turn blind area and provide a solution, under the premise of using AI technology automatic control system, without the traditional way of alerting drivers only by buzzing alarm device. In this paper, a system that contains a millimeter radar and dual voice system aims to warn pedestrians and drivers of impending traffic accident and reduce the probability of accident.

High voltage relay as a protective switching device is one of the important devices for electric vehicles, to better evaluate its application condition and reliability becomes particularly important. Based on the application scenario requirements and the technical status of high voltage relay in the current multi-in-one integration trend of pure electric passenger vehicles, the technical requirements of high voltage relay should be studied. Through actual investigation and research, literature collection and application case analysis, the application conditions of high voltage relay are summarized and analyzed in detail. On the basis of the existing technical requirements of high voltage relay, In this paper, it is proposed that the contact state of high voltage relay should be evaluated in depth, and some suggestions are provided for the application of high voltage relay for pure electric passenger vehicles.

In the early development of vehicle body controller functions among domestic automobile manufacturers, usually texts were used to describe the system design. The dependency between various functions was blurring, and hardly to reuse. With the increasing demand for the number of functional requirements, in order to improve the reuse rate of various functions, Service-Oriented Architecture (SOA) solution is proposed in the industry. This paper excavates the design methodology knowledge of SOA architecture, summarize the practical experience of the design and development of the ambient light subsystem in the body control domain of Voyah automobile SOA platform, expounds the method of using Enterprise Architect (EA) software to complete the design of the system in the body control domain, deliver the development requirements documents and the system functional specifications, so as to achieve the purpose of improving the design efficiency and improving the design quality.