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Rising fuel prices and climate change are issues of global concern, and millions of people around the world need public transportation every day. Voith has sold more than 200,000 DIWA automatic transmissions as an expert in urban bus automatic transmissions, making a significant contribution to public transport around the world. Voith has recently provided two economical and eco-friendly hybrid drive applications based on its unique technology in urban bus manufacturing. 
Voith's first Diva automatic transmission was introduced as early as 1949. Since then, the power split principle has ensured the maximum comfort, efficiency and economy of automatic transmissions, establishing the standard for automatic transmissions in urban bus applications.
In addition, we all know that product and technology innovations are greatly influenced by the environment and responsible factors for the next generation. To this end, Voith has made a positive contribution to the environment by reducing fuel consumption and emissions. Based on its unique experience and the well-known combination of mechanical, electrical and electronic aspects, Voith offers two hybrid drive systems.
Based on DIWA technology and the application of an asynchronous motor, Voith developed the DIWA hybrid. The advantage of this parallel hybrid drive system is its universal applicability, which is particularly applicable to urban bus buses with higher average speeds. This parallel hybrid drive has the advantages of the well-known Diva, such as the power split principle at the start, the rear retarder and the E300 electronic control system with diagnostic software ALADIN, plus a low-loss asynchronous motor These characteristics support the diesel engine in the start-up and acceleration phases.
During braking, the asynchronous motor becomes a generator and acts as a primary retarder, which perfectly complements the Diva secondary retarder. In this way, the service brakes are protected and the brake wear and fine dust generation are minimized. DIWA hybrid application has a prominent role in the average bus speed of urban buses.
Voith relied on the ElvoDrive series of hybrid drive solutions for large passenger traffic in urban traffic. The core components of both hybrid drive solutions are converters developed by Voith specifically for urban bus applications. As with all series hybrid drive schemes, power is transmitted only through electricity. Therefore, the efficiency of electrical devices is extremely important. This is why the Elvo Drive (ElvoDrive) relies on the Voith TFM technology (TFM = transverse flux machine) to support the generator and the motor. TFM has created conditions for the efficient operation of the entire system with its extremely high efficiency, thereby reducing power consumption and emissions. The ElvoDrive (ElvoDrive) can also produce maximum benefits in urban traffic with a low average passenger traffic.
Both systems use transducers developed by Voith to ensure reliable and stable energy management and the energy storage system offers operators maximum flexibility. In large passenger traffic urban or long-distance traffic, Voith can provide suitable hybrid drive technology for any city bus.
Dr. Su Mingyue, President of Voith Turbo Technology Systems (Shanghai) Co., Ltd., stated that in China, we hope to establish a long-term partnership with Chinese users with the most reliable technology and the most suitable product design and services for the Chinese market. Increase investment in China. Voith products reflect the Voith humanity concept: light weight, comfortable operation, energy saving and low operating costs. Together with Voith's global service system, this innovative advantage in the international bus market will be brought to China to help boost the Chinese bus to the world.
About Voith Drive
Voith Turbo is the world's leading industry expert in the application of hydraulic drives, couplings and brake systems, and marine propulsion systems in roads, tracks and industrial applications. There are more than 200,000 passenger vehicles in the world. Box-driven, 600,000 Voith retarders provide safe, efficient, and economical braking for heavy-duty commercial vehicles and are the standard equipment for Mercedes-Benz and other European luxury passenger cars. It is a division of Voith AG. Voith has set standards for papermaking technology, power transmission, energy technology and industrial services in the world field. Founded in 1867, Voith has 290 branches worldwide, approximately 43,000 employees, over 10,000 valid patents, and annual sales of nearly 5 billion euros. It is one of the largest family-owned companies in Europe. Voith is the official partner of "German Creative Land".
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