The Weichai WP7H engine powers 30-100t rough-terrain cranes, delivering 221 kW of power and 1200 N·m of maximum torque. The engine complies with China Non-Road Stage IV, EU Stage IIIA, and EU Stage V emission standards. Based on the operational characteristics of rough-terrain cranes, which require both low-speed loading and high-load travel, we have developed proprietary engine performance that balances low-speed transient response with high-speed, high-power output to meet vehicle lifting and site transfer requirements.