Self-owned brands take off the electric bus transmission market


Accompanied with the increase in sales volume of the pure electric passenger car market is the rapid development of the core components of “Three Electrics” (motors, electronic controls, and batteries). Nowadays, we should put "" after "Three Electricity." Because, the special automatic transmission for improving the operating efficiency of pure electric buses also ushered in the market "East Wind."

“In the field of pure electric buses, the number of models equipped with automatic transmissions has exceeded 30%. Among them, autonomous brand automatic transmission suppliers dominate and the market share is above 80%.” Recently, Li Shengqi, Secretary-General of China Automotive Automatic Transmission Innovation Alliance A reporter of China Automotive News said.

“Consumers have a more accurate understanding of pure electric buses equipped with automatic transmissions, and the penetration rate of automatic transmissions for pure electric buses will increase substantially,” said He Junzheng, general manager of Tianjin Zhongde Transmission Co., Ltd.

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â–  Increased efficiency by more than 15%

At the beginning of the development of pure electric passenger cars, the direct transmission drive method of the motor was mainly adopted, which greatly limited the working efficiency of the motor, and matching the automatic transmission is one of the main ways to improve the transmission efficiency of a pure electric passenger car. “Pure electric passenger cars require ever-increasing demands on gradeability and energy consumption. From the perspective of the powertrain, integrated integrated powertrains with automatic transmissions will be favored by more and more bus manufacturers.” Li Zhanjiang, chairman of Nanjing Yuebo Power Systems Co., Ltd., believes that the power system of pure electric passenger cars is mainly driven by motors from several years ago and is gradually changing to an integrated technology solution with automatic transmissions. This solution has not only been rapidly promoted in the pure electric passenger car and logistics vehicle market, but also started to be used in large quantities in the pure electric passenger car market.

It is understood that before 2010, domestic enterprises and colleges and universities have begun to develop automatic transmissions for pure electric buses, but most of them remain at the theoretical and prototype stage. During the 2010 Shanghai World Expo, a small number of pure electric passenger cars equipped with 3-speed AMT were put into the market, but due to the high operating costs and the related supporting technologies were not perfect, they could not be fully promoted. In 2015, passenger car plants increased the R&D investment of pure electric buses equipped with AMT automatic transmissions, and the market sales volume has also been rapidly increased. At present, the automatic transmission technology of pure electric passenger cars in the domestic market is based on AMT.

“Under the same conditions, pure electric buses equipped with automatic transmissions have significantly increased driving range, and the vehicle operating efficiency can be increased by 15% to 20%.” Fan Zhixian, Director of Zhongtong Bus New Energy Engineering Center, introduced the following two conditions: It is more suitable for retrofitting automatic transmissions: First, group buses such as coaches and fixed-line shuttles are required. These vehicles have higher requirements for average speed. The addition of an automatic transmission ensures that the passenger cars can make the motor work efficiently at low speeds and high speeds. The second is that in areas where there are many climbing roads such as Yun, Gui, Chuan, etc., the automatic transmission can effectively improve the climbing ability of the vehicle.

Sino-German pure electric passenger car transmission


The comprehensive operating cost advantage is also one of the factors that contribute to the improvement of the installation rate of automatic transmissions for pure electric passenger cars. Xu Xiangyang, professor of the School of Transportation Science and Engineering at Beijing University of Aeronautics and Astronautics, told reporters that under the same conditions of use and achieving the same performance requirements, pure electric buses equipped with automatic transmissions will have lower operating costs. "After the entire vehicle transmission system has been optimized, the operating cost of the vehicle can be further reduced," he said.

■ Self-owned brand enterprises occupy the market “Individual brand suppliers occupy the absolute advantage of the automatic transmission market for pure electric buses. Although some well-known international foreign suppliers have long been involved in this field, they do not have the obvious technical advantages. The independent brands have occupied this. Block market.” Insiders pointed out.

Li Shengqi believes that in the commercial vehicle market, self-owned branded parts and components companies have in-depth research and development of AMT. The self-owned brand AMT products have attracted attention due to their technical and cost advantages. In the pure electric passenger car automatic transmission market, the majority of the market is dominated by a few suppliers such as Tianjin Zhongde, Nanjing Yuebo, and other domestic and foreign suppliers have relatively little sales.

According to an interview with the reporter, Tianjin Sino-German is one of the major suppliers of pure electric and hybrid passenger car transmissions in China. It has a 4S1000 pure electric passenger car transmission with four gears, which can effectively improve the ability of climbing and driving the vehicle after matching the vehicle. The performance and driving range have been applied in batches to buses of 8 to 12 meters, which has been recognized by the vehicle customers. Nanjing Yuebo began with an automatic transmission and entered the pure electric passenger car market in 2013. Its main AMT pure electric power system assembly adopts an integrated design scheme of a permanent magnet synchronous motor and a 4-speed automatic transmission, featuring high torque, low noise and energy. Low consumption and other advantages.

“The power system of Nanjing Yuebo New Energy Bus is mainly based on four-speed automatic transmission. The supporting customers will cover mainstream mainstream new energy vehicle manufacturers such as Dongfeng, Chang’an, Golden Brigade, Zhongtong, and FAW.” Li Zhanjiang said that Nanjing entered this market for three years, Nanjing The sales volume of Yuebo increased rapidly and occupied 70% of the domestic automatic transmission market. In 2015, Nanjing Yuebo pure electric assembly system has a loading capacity of nearly 10,000 units, and it is expected that it will exceed 30,000 units in 2016.

Challenges still <br> <br> under â–  integration trend interviews, industry experts said, the motor and the automatic transmission is highly integrated development of pure electric passenger car market, the development of major technology trends. At the same time, high efficiency and low energy consumption are the long-term goals for the development of automatic transmissions for new energy buses. "New energy auto transmissions need to be deeply developed for features such as integration, light weight, low noise, and high transmission efficiency," said He Junzheng.

Although the development of the industry is good, it also faces many challenges. He Junzheng said that the challenge first comes from the technical maturity and reliability of new energy vehicle transmission products. The new energy automatic transmission must not only highlight “the increase of vehicle power, increase the driving range, and increase the fuel saving rate” during the entire vehicle use. Such technical advantages, while ensuring product reliability, eliminate user quality concerns. The automatic transmission matched with a pure electric passenger car also develops into multi-blocks, and the increase in the number of gears has led to a significant increase in the technical requirements for electronic control.

Enterprises are also facing the challenge of manufacturing costs. This requires the development of large-scale developments to reduce the costs of components including transmission actuators, sensors, and control units, thereby increasing their overall competitiveness. In addition, industry insiders pointed out that the development of pure electric bus industry is affected by the policies. The growth of pure electric buses in the past two years mainly depends on subsidies. Therefore, the development of pure electric automatic transmissions is also affected by the subsidy policy.

Li Shengqi believes that in the development of independent brand automatic transmission suppliers, it is necessary to focus on two aspects. First, the continuous improvement of the transmission efficiency of automatic transmissions requires a lot of verification work before it is integrated into the vehicle. The second is to strengthen the noise control of the motor at high speed and improve the ride comfort of the vehicle.



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