As a leading bus manufacturer, Yutong is always at the forefront of innovations. It has developed the new-generation hybrid system, known as DMT (dual mode transmission) hybrid traction system. The system coaxially arranges the dual motors that boast high power performance and high energy efficiency and eliminates the need for a gearbox. This helps reduce mechanical failures and enhance reliability. As a result, Yutong DMT hybrid electric buses prove advantageous over traditional AT buses and other hybrid buses on the market.

Yutong DMT Hybrid Electric Bus: Upgraded Performance

1. Easier-to-Control Electric Motor 

Yutong DMT hybrid electric buses are equipped with dual motors that provide high power performance and superior energy efficiency. These electric motors are easier to control and have a lower failure rate compared to the previous generation XCVT, contributing to reduced maintenance and operational costs. The instant output power is more substantial, and the motors can achieve higher rotational speeds, which translates to a more electrified driving feeling with more direct power delivery.

2. More Efficient Electric Control 

Yutong's proprietary electric control system comes from decades of experience in bus manufacturing and over ten million kilometers of road test data. This smart platform is more efficient and better suited for urban driving conditions, ensuring that the DMT hybrid bus can adapt to various operating environments and needs.

3. Safer and More Durable Capacitor 

A DMT hybrid electric bus features ultracapacitors that offer higher safety with no risk of fire or explosion. These ultracapacitors have a longer service life compared to fuel cells.They also allow for faster voltage and current changes during instant charging and discharging, contributing to higher energy recovery efficiency during regenerative braking.

Overall, the DMT hybrid traction system represents a significant advancement over its predecessor. The electric motors offer improved controllability, the electric control system provides optimized efficiency, and the capacitors deliver higher safety and durability.

Yutong DMT Hybrid Electric Bus: Core Advantages

1. Energy-Efficient 

With DMT energy-saving technologies, Yutong's second-generation hybrid electric products can save fuel consumption by over 30% compared to traditional fuel vehicles. This is mainly attributed to the three core energy-saving technologies adopted in the DMT hybrid traction system: Intelligent Control Strategies for the traction system, Automatic Regenerative Braking Technology, and the 2nd generation of Engine Thermal Management Technology.

Intelligent Control Strategies for the traction system modulate the engine's operating range and ensure it operates within its high-efficiency region. The engine is also intelligently controlled to start/stop based on air pressure, voltage, temperature, air con, and other factors. This reduces power consumption, especially at idle speeds.

The Automatic Regenerative Braking Technology means the energy can be recovered from braking. This reduces energy loss and leads to a 1-2% reduction in fuel consumption. The electrification of steering and cooling systems in Yutong's DMT hybrid electric buses also reduces the power consumption of these systems, which leads to a 7-10% reduction in fuel consumption.

2. Safe 

Yutong's hybrid electric buses feature a highly safe structure. Its steel-made sealed-ring structure, combined with high-strength skeletal profiles, ensures the safety of the vehicle's body.

The side longeron, roof crossbeam, and window pillars are integrally connected to form a closed-loop bus frame. This structure optimizes the way to cope with external forces. Upon shock, the hybrid electric buses effectively distribute the localized force across the entire vehicle, ensuring safety and reliability.

The bus frame is made of light-weight yet high-strength steel, of which the tensile strength reaches 750Mpa - elevated by over 10% compared to ordinary steel. This means that in the event of a collision or rollover, the high-strength steel material can minimize the deformation of the vehicle, thereby providing better protection for passengers and reducing the risk of injury.

In terms of components, the use of ultracapacitors and the water-proof nature of the three electric systems effectively ensures the safety of the vehicle.

Ultracapacitors are a type of electrical energy storage with stable performance and high safety. They can be quickly charged and discharged hundreds of thousands of times without degradation or decline in lifespan.

The ultracapacitors, along with drive motors and motor controllers, achieve IP68 and IP6K9K protection. Whether sprayed with high-pressure water guns or submerged in water on the road, these hybrid electric buses can function normally without the risk of short circuits.

3. Eco-friendly 

As discussed above, Yutong's DMT hybrid vehicles save over 30% of fuel consumption and effectively reduce emissions compared to traditional vehicles. The ultracapacitors used in Yutong's DMT hybrid vehicles are integrally eco-friendly. They are primarily composed of recyclable carbon materials, conductive polymers, and metal oxides, all of which do not pollute environments at all during production, use, storage, and dismantling.

These sustainable practices translate to significant environmental benefits. Every 100 12-meter hybrid buses can save 760,000 liters of fuel annually, reduce PM emissions by 240 kilograms, reduce NOx emissions by 12 tons, and cut carbon dioxide emissions by over 2,000 tons. This is equivalent to planting 15,000 trees across 20 soccer fields.

DMT Hybrid Electric Buses Are Well-Suited for Urban Transit

For commercial buses operating within cities, frequent deceleration, stopping and starting at stations, waiting at red lights, and low-speed driving are common. DMT hybrid traction system incorporates Intelligent Control Strategies for the traction system, Automatic Regenerative Braking Technology, and the 2nd generation of Engine Thermal Management Technology. These advanced technologies make DMT hybrid buses more energy-efficient and cost-effective compared to traditional buses and highly suitable for urban transportation.

DMT hybrid traction system is set to be equipped in models such as H10 and H12, with initial market launches targeted in countries including Mexico, Kazakhstan, and Pakistan. These DMT hybrid buses will gradually expand to various regions around the world, providing innovative solutions for customers worldwide.

Conclusion 

Overall, Yutong's new-generation DMT technology brings the most significant improvement in fuel-saving rate across the whole vehicle. This represents Yutong's commitment to environmental protection and technological innovation. As the demand for sustainable transportation grows, Yutong's DMT eco buses will stay committed to providing eco-friendly, energy-efficient, and reliable transportation solutions that contribute to a greener future.