Should I Refer to A or B for Fuel Consumption?
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A and B refer to recording two sets of mileage data. For example, use Meter A to track how many kilometers a full tank of fuel can cover, resetting Meter A after refueling, while Meter B can be used to record the round-trip mileage of a road trip. Below are specific details about fuel consumption: 1. Fuel Consumption Testing: There are various methods for testing fuel consumption, which can be broadly categorized into two types: direct measurement and indirect measurement. The Ministry of Industry and Information Technology adopts the indirect measurement method. For light-duty vehicles (those with a maximum total mass not exceeding 3.5 tons), the entire vehicle is placed on a test bench to simulate actual road speeds and loads. The vehicle operates under specific conditions (such as idling, acceleration, constant speed, deceleration, etc.), and emissions of carbon dioxide, carbon monoxide, and hydrocarbons are measured. Fuel consumption is then calculated using the carbon balance method. 2. Combined Fuel Consumption: During testing, the vehicle operates under various conditions, including idling, deceleration, gear shifting, acceleration, and constant speed. In urban driving conditions, the average speed is only 19 km/h, with a significant amount of time spent idling. In suburban conditions, the average speed exceeds 60 km/h, with more time spent at constant speeds. Combined fuel consumption is calculated by dividing the total emissions from both urban and suburban driving cycles by the total distance covered in these cycles, then using the emissions data to derive the corresponding fuel consumption value.