The positive ergonomics development follows the principle of “people oriented, from inside to outside, inside and outside combination, distribution as a whole”. Based on the positive ergonomics principle to define the vehicle dimension chain, the man-machine’s operation for vehicle comfort, vision field security, instrument visibility performance and other vehicle performance can be achieved. Excellent positive ergonomics control strategy is beneficial to vehicle platforms and series development, which improve the competitiveness of products. In this paper, based on positive ergonomics,10 key dimensions of the vehicle control method and the X, Y, Z direction dimension chain control strategy are elaborated emphatically, so as to pave the basis for research and development of platform vehicle models.

Through numerical simulation and wind tunnel test, the influence of the rim opening ratio on the wind resistance of the vehicle under the wheel rotation condition is analyzed, and the recommended value of the rim opening ratio in design and development is given. Meanwhile, the correlation between the moment of ventilation resistance and the vehicle wind resistance is analyzed, and then the mechanism of wheel rotation drag reduction is analyzed. Analysis conclusions can be as following: (1) The simulation method of wheel rotation condition is credible by using the rotating wall method; (2) Under the wheel rotation condition, the smaller the opening ratio is more favorable for the vehicle wind drag reduction, and the difference of the vehicle wind drag coefficient between the rotating condition and the stationary condition will be reduced; (3) The greater the wheel ventilation resistance torque, the more conducive it is to reduce the wind resistance coefficient of the whole vehicle under rotation conditions.

In order to solve the problems of fast pace large-scale manufacturing and production for commercial vehicle products to meet use scenarios and user groups, with prominent personalized needs, this paper aims to use the concept of passenger vehicle platformization for reference and combining the attributes of commercial vehicle products through carrying out platformization and modular design from product planning. Taking the construction of a commercial vehicle platform as an example, this paper redefines the concept of commercial vehicle platformization, and briefly discusses the significance and role of commercial vehicle platformization and modular design. The process and methods of constructing commercial vehicle platform are elaborated, which provide bases for new platform building and new product development of commercial vehicles.

The integration efficiency and energy density of power batteries are the key factors affecting the improvement of the driving range of electric vehicles. Selecting the appropriate power battery integration technology can not only improve the integration efficiency and energy density of the battery system, but also help reduce the costs of the entire vehicle. Focusing on the development trends of power battery system, this paper summarizes 3 key integration technologies of power battery systems: typical integration, module-free integration, and one piece integration. Elaboration is conducted from the technical realization, advantages and disadvantages, application trends. The conclusion and prospect from elaboration show that the power battery system is accelerating towards the trend of less components and more integration. The breakthrough of power battery system integration technologies will bring the vehicle better power, economy, higher driving range and better user driving experience.

In order to improve the sound quality of vehicle, a new sound system suitable for passenger car is proposed. Based on the finite element analysis theory, the car door panel model is established, and the calculated natural frequency and mode shape of the door panel are utilized as an important input for the improvement of sound system. In order to reduce the influences of mode on sound level, the measures to improve the mode resonance frequency are put forward. Based on the expected level of cockpit space and psychological perception, a 23-speaker system improvement scheme is developed. Finally, the target car prototype after modification is evaluated through subjective evaluation and objective test. Through the comparison of competing cars, the results verify that the above method can significantly improve the sound level of passenger cars, and provide a reference for the improvement of passenger car audio system.

The in-vehicle voice assistant is the first-level entrance for human-computer interaction in the vehicle. The business processing and interaction capabilities of the voice system in comprehensive scenarios greatly affect the user experience. This article elaborates a set of comprehensive evaluation models, which can fully analyze the function points of the vehicle voice system, derive the implementation logic of competing products, and stage evaluations in production. This model includes a set of evaluation use case databases that support the calculation of 103 quantitative indicators, 15 generate non-quantitative indicators and 3 comprehensive indicators. In addition, this model includes full-process indicator analysis tools and other automation tools. In the actual production and application process, the error rate of this model compared with manual evaluation is about 10%, and the automation efficiency is increased by about 70%.

For electrified vehicles (combustion engine, hybrid and pure electric vehicles), transmission efficiency improvement is the main technology route, which is significant to reduce energy consumption of the vehicle. Efficiency improvement strategies are used to reduce the losses in transmission system. This paper takes the high efficiency automatic transmission of FAW Group as an example to explain the source of efficiency loss and the corresponding efficiency improvement technology. First, a brief background of electrified automation is reviewed. Then, key sources of the transmission efficiency loss are discussed. Finally, some key technologies and research trends of high efficiency transmission are given.

Under the circumstances that the price of raw materials and production support materials is still high nowadays, the material quota-cost method is an effective cost management method that can be adopted by passenger car and component companies. This paper mainly starts from the welding and assembly process management of production support materials for passenger car body, outlines the basic principles of the material quota method, the management procedures for production support materials, the formulation of quota specifications and management contradictions, and proposes the reproducible and implementable measures and recommendations by the application of the quota-cost method for production support materials used in welding production lines in order to improve the implementation efficiency and economic benefits in the quota management of production support materials for body in white.

This paper has built a comprehensive evaluation model of intelligent vehicle following function based on thorough analysis and research. Time To Collision (TTC), Time To Headway (THW), the most acceleration (deceleration), speed, the relative distance including longitudinal distance and lateral distance are chosen as evaluation parameters in this model according to test standards and monographs. With the help of Delphi method, the correlation between the evaluation parameters and safety/comfort has been calculated from experts’ advice. Then a comprehensive evaluation index system of intelligent vehicle following function has been set up based on AHP, so as to construct a multi-dimensional evaluation model. This model combines objective safety with subjective experience, which can provide evaluation basis for the comprehensive evaluation of intelligent vehicle following function.

With the demand of consumers for buying the second cars, the requirements for the functionality and comfort of cars have increased, especially for the riding comfort of the seat. The traditional car seat system design does not fully consider the user’s rest situation, resulting in poor riding experience in the later stage. Through the analysis of traditional seat layout design in the early stage, the human-machine layout requirements of zero gravity seats are formulated, and the optimization design parameters of zero gravity seat layout are checked, design and development methodologies are effectively summarized. By optimizing the human-machine parameters of zero gravity seats, more use scenarios of seats are added to protect the health of drivers and passengers, zero gravity seats are successfully applied in the market.