As global public transportation continues its transition toward greener solutions, technology pathways must adapt to diverse market conditions, infrastructure availability, energy supply conditions, and operational scenarios. Hybrid technology provides a practical balance between emission reduction goals and real-world operational needs. Yutong’s second-generation DMT hybrid system focuses on efficiency, reliability, and lifecycle value, delivering tangible benefits throughout daily operations.

DMT Intelligent Control: Driving Greater Energy Efficiency

Yutong’s second-generation DMT hybrid system delivers outstanding energy-saving performance. Through intelligent vehicle control strategies, the system continuously monitors vehicle speed, load conditions, and energy storage status, and automatically switches among multiple operating modes, including pure electric drive, series hybrid, parallel power generation, parallel assist, direct drive, and regenerative braking.

The DMT hybrid enables engine idle-stop and pure electric start, helping the engine avoid inefficient operating conditions and reducing fuel consumption while also lowering noise around bus stops. During low-speed operation, the engine maintains a stable speed for efficient power generation, while the electric motor drives the vehicle. During medium-to-high-speed cruising, the engine operates within its high-efficiency range and directly contributes to vehicle propulsion to minimize energy conversion losses. Under high-power demand conditions, the electric motor provides timely assistance to enhance performance the electric motor provides timely assistance to boost output and cut energy‑conversion losses. During deceleration and braking, the drive motor functions as a generator to recover braking energy and store it for future acceleration, reducing energy dissipation. 

By continuously optimizing power flow, Yutong DMT enables the engine to operate more frequently within its efficient economic range, achieving idle stop, optimized operating points, and energy recovery, supporting overall fuel savings of more than 30%. The core of hybrid technology is not simply adding an electric motor, but enabling the engine and motor to play to their respective strengths across different operating scenarios.

FromCore Components to Vehicle Design: Supporting Long-Term Operational Reliability

The value of hybrid buses lies not only in fuel savings but also in long-term operational reliability. Yutong DMT adopts a dual-motor coaxial layout with a clutch-engaged power coupling, eliminating the traditional transmission and reducing potential failure points such as bearings and oil seals.  The supercapacitor supports more than one million charge‑discharge cycles, maintaining durability under frequent start-stop urban bus conditions.

The drive motor and controller achieve IP68 and IP6K9K protection ratings, enabling reliable operation in challenging environments, including extreme cold, rainy seasons with water accumulation, and high coastal temperatures.

The DMT hybrid integrates the drive motor controller, steering controller, generator controller, DC/DC converter, and high-voltage distribution into a five-in-one controller, reducing weight by over 50%, decreasing volume by over 60%, and cutting high-voltage connection points by 59%, significantly reducing potential points of failure.

In addition, Yutong DMT features maintenance-free wheel ends, modular bearing units, and wide-opening compartments, along with a smart connected system capable of remote diagnostics. These features can significantly shorten maintenance downtime and help ensure high vehicle availability.

Built around real-world public transport needs, Yutong DMT hybrid technology systematically addresses challenges in energy consumption, reliability, comfort, and maintenance. Yutong continues to create tangible value for customers through practical technological innovation. As global markets embrace diverse pathways toward new energy mobility, hybrid technology has become an important solution that balances green transformation with operational efficiency.