What does a bus go through before it hits the road? At Yutong, the answer lies in anticipating potential risks in real-world operations and putting vehicles through a series of rigorous tests before they leave the factory. These tests help prepare vehicles for reliable operation on the road, enabling customers to maximize operational value while delivering a better travel experience.

Multiple Tests: A Focus on Safety and Passenger Comfort

During daily operations, buses may encounter heavy rainfall, waterlogged roads and prolonged wet and slippery conditions, placing demanding requirements on their wading capability and waterproof sealing performance. In some parts of Mexico, heavy rainfall is concentrated during the rainy season, while many European countries experience prolonged periods of rain. These conditions place different demands on vehicles’ wading capability and sealing performance.

To address these conditions, Yutong's proving ground features an 80-meter-long wading test area with a static water depth of 0.5 meters. During testing, vehicles are required to operate normally in 0.5-meter-deep water to verify the waterproof sealing performance of vehicle compartments and the battery insulation performance of fully electric buses. A rainfall test chamber is also located on the southwestern side of the proving ground. By adjusting water volume and spray angles, it simulates various rainfall conditions, ranging from light rain to extremely heavy downpours. All completed vehicles undergo rainfall testing, with standard vehicles tested for 15 minutes and certain vehicles tested for 30–60 minutes according to model-specific requirements. These tests evaluate the waterproof sealing performance of the roof and side windows.

Beyond external conditions, the interior environment is another importantaspect of pre-delivery testing. Covering more than 300 square meters, Yutong's environmental test chamber can accommodate large, medium-sized and small buses for environmental testing. It enables the assessment of vehicle interior odors and the analysis of harmful gas concentrations and composition against relevant limits, providing a basis for improving cabin air quality and creating a healthier environment for passengers.

Professional Test Tracks: Comprehensive Evaluation of Vehicle Performance

Buses operating in different markets often face distinct road conditions. In the Netherlands, frequent roundabouts require agile steering, while Norway's continuous gradients and mountainous roads place greater demands on climbing capability and driving stability. To address these challenges, Yutong has established a professional proving ground covering a total area of 59,820 m². It features dedicated testing areas, including a high-speed test road, a comprehensive test track, a hill-climbing track, a high-speed banked oval track and an ESP test area, enabling comprehensive evaluation of vehicle dynamic performance.

The comprehensive test track stretches over 1,200 meters and simulates a variety of road surfaces, including washboard roads, long-wave undulations, rocky roads, torsion test sections and damaged pavement. These tests evaluate the chassis' ability to negotiate challenging road surfaces, along with vehicle stability, reliability and braking performance, while also identifying potential abnormal noises inside the vehicle during operation. For gradient conditions, Yutong has built a hill-climbing track with a horizontal length of 155 meters and a maximum height of 13.7 meters. Featuring gradients of 30% and 20%, the track is used to verify vehicle climbing capability and parking brake performance.

High-speed oval track testing extends these evaluations to higher-speed driving conditions. With a maximum banking angle of 40.3° and test speeds of up to 70 km/h, the track is primarily used to assess vehicle stability and acceleration performance. In addition, the ESP test area is used for steering performance tests and ESP system calibration, verifying vehicle stability under the corresponding driving conditions.

Through rigorous and comprehensive pre-delivery testing, Yutong verifies vehicle performance under different operating conditions in advance, helping customers reduce operational uncertainties, enhance the value of vehicles in operation and deliver a better travel experience for the public.