How is the MIIT Fuel Consumption Data Measured?
1 Answers
1. Selection of Test Vehicles: Vehicles that have undergone a break-in period of approximately 3,000 kilometers and have a maximum mileage not exceeding 15,000 kilometers are selected. These vehicles are driven on standard road surfaces to measure the resistance they encounter at different driving speeds. 2. Simulated Environmental Testing: The vehicles are driven on standard road surfaces to test the resistance at various speeds. Then, in a controlled environment, the vehicle is placed on a test platform with the temperature maintained between 20-30°C. The drive wheels are placed on a dynamometer (similar to a chassis dynamometer used for horsepower testing), and reverse resistance is applied to the drum. Fans are positioned to simulate airflow during high-speed driving, and interior functions like lights and air conditioning are turned off, rather than actually driving the vehicle on the road. 3. Simulated Road Condition Testing: The testing method used is the NEDC (New European Driving Cycle) method. The test conditions are divided into urban and suburban driving cycles. The urban cycle consists of four identical sub-cycles, covering a total distance of 4.052 km over 195 seconds. The suburban cycle consists of a single sub-cycle with an average speed of 62.6 km/h, a maximum speed of 120 km/h, covering 6.955 km over 205 seconds. 4. Calculation of Fuel Consumption Results: The combined fuel consumption is calculated by dividing the total emissions from both urban and suburban cycles by the total distance covered (4.052 + 6.995 km), and then converting the emissions into fuel consumption values.
