Dual-integration policy is about to introduce multi-speed transmission to become an important way to improve the performance of electric vehicles

Transmission and its control technology are an important part of the development of automotive transmission systems, and one of the key areas of automotive technology research and development. With the announcement by the Ministry of Industry and Information Technology that the timetable for the ban on fuel vehicles in China is on the agenda and the dual-points policy is about to be introduced, new energy vehicles have become a hot spot in the industry. According to the research report of the international authoritative organization EVI, the survey results of more than 10 member countries including China, accounting for 98% of the global electric vehicle market, show that the next few years will achieve 20% annual growth rate. The number of electric vehicles (pure electric + plug-in hybrid) has increased, and by 2020, the market target of 20 million electric vehicles in the world will be achieved. Most of the pure electric vehicles on the market today use a single-speed reducer for power transmission, and no speed ratio conversion. Since the single speed ratio of the single-speed reducer is difficult to meet the optimal performance requirements under various operating conditions such as high-speed driving, low-speed driving, accelerated overtaking, ramp driving, and braking energy recovery, the development of multi-gear transmissions has become an improvement. The important way of electric vehicle performance is also the field of research and development of major OEMs, suppliers and scientific research institutions.

At the first "Joint Automotive Electronic Transmission Control Technology Campus Forum" co-sponsored by United Automotive Electronics Co., Ltd. (UAES) and Jilin University, from China Gear Professional Association, SAIC, FAW, Dongan Automobile, Great Wall Motor, United Automotive Electronics The technical engineers of the gearbox and powertrain and the experts and scholars of automobile engineering such as Jilin University, Hunan University and Hebei University of Technology gathered together to report on the core technology and future development of China's current automotive transmission, and conducted live exchanges on the spot. Explore. The forum aims to strengthen cooperation between enterprises and universities, and at the same time build a communication platform between transmission-related enterprises.

United Automotive Electronic Transmission Control Technology Campus Forum

Yang Qing, System and Function Development Manager, United Automotive Electronic Transmission Control Business Unit

Manager Yang Qing of United Automotive Electronics introduced the development of dual clutch automatic transmission (DCT) control system, from DCT market demand and application, DCT control system composition and related product development, DCT control function development and DCT control key technology. Four aspects were explained. He said that the current global automatic transmission sales continue to grow, and the market share of DCT is also steadily increasing. The market demand and application prospects of DCT will be very broad in the next few years.

In response to the current efforts of various OEMs to increase the research and development of automatic transmissions, Yang Qing pointed out that although the demand for transmissions is very large from the market perspective, it is very hot from the project perspective, but can not ignore the current status quo, some in the field of transmission development. Key modules, including dual clutch modules, are still in the hands of a few foreign component suppliers. Behind the market and projects, the domestic technology base in this field is relatively weak, and it is necessary to strengthen communication and communication with the gearbox development field. Focusing on tackling key issues and striving for breakthroughs in these areas is also one of the purposes of this forum.

Xue Dianlun, Associate Professor, School of Mechanical and Transportation Engineering, Hunan University, Chairman of Jinrun Electro-Hydraulic Control System Co., Ltd.

Dr. Xue Dianlun from Hunan University gave a speech on the hydraulic control module of high-efficiency and high-precision automatic transmission, expounding the current automatic transmission industry crisis, the development of key technologies of hydraulic modules and the current status and future planning of Jinrun. Through the analysis of the automatic transmission type in the Chinese passenger car market, he pointed out that the current automatic transmission has a large gap between China and foreign countries, and the domestic technology maturity is not enough. It relies on foreign transmission or import, the industrial support of the transmission core components is insufficient, and the product cost and consistency are difficult to control. Currently, demand is being suppressed by the current production capacity.
Xue Dianlun predicted that the absolute gap of self-owned brands from current to 2020 will reach 2.6 million units/year, of which AT, DCT and CVT based on electro-hydraulic drive are estimated to be about 2.4 million units, and the demand will be suppressed. Gradually released. In 2020, 2025, and 2030, the overall demand for automatic transmissions in China will reach 16.5 million units, 21 million units, and 24.7 million units, respectively. The supporting hydraulic modules are based on 700 yuan per set. The overall market size of electro-hydraulic modules will exceed 17.5 billion yuan in 2030. "Only by deep cooperation in the entire chain, the role of parts companies from subordinates to strategic partners can fundamentally realize the leap in the automatic transmission market."

Ma Jing, deputy director of Harbin Dongan Automobile Engine Manufacturing Technology Center

Ma Jing of Dongan Automobile Engine Manufacturing Technology Center introduced the development process of DAE automatic transmission. She entered the automatic transmission field from the introduction of 4AT technology, cooperated in the development of 6AT exploration automatic transmission independent research and development, realized 6AT industrialization through independent research and development, and formed the scale of automatic transmission industry. The four stages of development planning are explained. In the process of introducing 4AT technology, she said that the important assembly processes of the production line use online measurement matching, automatic assembly and quality monitoring feedback, using computer network to manage production information, quality information, and network upload function, the assembly line is constant temperature, no Dust-proof and positive-pressure enclosed rooms are widely used in dust-proof technology, press-fit automatic alignment technology, air logistics technology, KITBOX technology, electric servo press-fit technology, phase-forming technology, ID technology, and QR code. Advanced assembly technology and process control such as technology and MES management technology.
It is understood that the offline detection program is the first in China, using test data acquisition and graphic output mode to detect the dynamic working process of the clutch. Ma Jing introduced, “Accurately describe the working points of each feature through the graph, it can accurately detect the change of performance parameters brought by the manufacturing deviation of the parts, strengthen the fault detection rate, and establish the automatic transmission production and quality assurance capability through these channels.”

Ding Bangwei, Deputy Chief of AT Matching Calibration Division, Control Technology Department, Harbin Dongan Automobile Engine Manufacturing Technology Center

Ding Bangwei, Control Technology Department of Dongan Automobile Engine Manufacturing Technology Center, introduced the development of the transmission A6F5 control system. He pointed out that the car has not been able to operate the electronic control system. The car electronic control system is developing rapidly like a mobile phone. In the future, the automotive electronic control system will also be more widely applied to the development of smart phones to solve practical problems. Through the introduction of the AVL-DRIVE system, the objective driving performance evaluation of the benchmarking vehicle was carried out, and the benchmarking gear shift quality database was established to form the DAE shift quality evaluation system and standard.

Ding Bangwei said that applying these smart technologies to the car can bring great convenience to software bug repair, upgrade and update, after-sales fault investigation, etc., and it is also beneficial to evaluate the performance of the software in the market. Improved software optimization provides data support. Further intelligent, it can set the sensitive boundary parameters of the vehicle, and find that the vehicle exceeding the boundary value will automatically alarm, and then judge the running state of the vehicle through remote data analysis to determine whether it needs to be processed in time. “Now some electric vehicles are already using this technology, and I hope to grow as fast as a smartphone.”

Chief Engineer of Geely Powertrain Research Institute, Distinguished Professor of National “Thousand Talents Program”, Professor Chen Yong of Hebei University of Technology

Professor Chen Yong introduced the current status and progress of the technology of automatic transmissions for new energy vehicles. He analyzed the technical route of pure electric vehicles automatic transmissions. He specially introduced the development practice of Geely Auto Transmission. Geely Automobile will adopt three technical routes of EV, PHEV and HEV, relying on the medium and high-end pure electric vehicle FE platform, small exclusive pure electric vehicle PE and CMA intermediate vehicle basic modular structure. Vigorously promote the rapid implementation of the new energy strategy.

The 1.5TD+7DCTH plug-in hybrid power system based on the CMA mid-level car infrastructure developed by Geely Europe R&D Center will be equipped with Geely's full range of models. In 2017, the comprehensive fuel consumption will be less than 2 liters per 100 kilometers, and the fuel consumption will drop to 1.8 liters in 2019. By 2020, the industry's leading 100-kilometer comprehensive fuel consumption target of less than 1.5 liters will be achieved. The hybrid electric power system CHS is a power split system with a full independent intellectual property rights after a 10-year research by Geely Automobile. The hybrid system will be equipped with Geely A-class to A+-class models, and mass production will begin in 2016. In the first phase, fuel economy is 40% in 2016, the second phase is 45% in 2018, and the third phase is 50% in 2020.

After the theme report, under the auspices of Professor Chen Yong, Dr. Wang Zhensuo from the Automotive Electronics Transmission Control Division, Professor Zhou Yunshan from the School of Mechanical and Automotive Engineering of Hunan University, and Ma Jing, Deputy Director of the Dongan Automobile Engine Manufacturing Technology Center, and other six technical experts and scholars. The participants discussed and communicated with the participants on the theme of the opportunities and challenges of the new energy application and the key technologies and software control capabilities of the transmission. It is hoped that under the current opportunities and challenges of new energy applications, the industrial cooperation and alliance of the domestic transmission industry will be strengthened to jointly promote the rapid and steady development of China's automobile transmission industry.