GB/T 40711.3-2021

This standard specifies the evaluation methods for the energy-saving effects of automotive air conditioning systems in passenger cars under off-cycle conditions, meaning real-world driving scenarios not captured by standard laboratory test cycles. It is applied by vehicle manufacturers and regulatory bodies to quantify and verify the fuel or energy savings achieved by advanced air conditioning technologies, such as variable displacement compressors or improved thermal management. The standard is used in China for type approval, energy labeling, and compliance with fuel consumption regulations for passenger cars.