What is the function of the ECO in air conditioning?

1 Answers
WillowDella
07/29/25 4:45pm
ECO is an acronym formed from the first letters of the English words Ecology, Conservation, and Optimization. It is a vehicle energy-saving mode. When the ECO indicator light on the dashboard illuminates, it indicates that the vehicle's economy mode has been activated. This mode primarily involves a comprehensive judgment and analysis of factors affecting fuel consumption during vehicle movement, such as automatic transmission gear position, engine speed, vehicle speed, braking, and transmission oil temperature. The ECU control unit calculates the optimal fuel quantity to be supplied to the engine for operation, effectively reducing fuel consumption compared to normal driving modes. Activating this mode can reduce unnecessary fuel consumption. Generally, it can be divided into two types: passive ECO driving mode and active ECO driving mode. The passive ECO driving mode mainly serves a reminder and guidance function. The active ECO driving mode usually has a button. When activated, a series of driving-related settings will change. For example, the throttle opening corresponding to the same accelerator pedal depth becomes smaller (the accelerator becomes less sensitive), the transmission shift logic prioritizes economy (shifting up earlier), and some vehicles may also adjust the air conditioning output power simultaneously. The ECO button is generally located on the left side of the car, marked with the letters ECO. Some buttons are green, making them easy to identify. Activating ECO is most effective in urban congested traffic conditions. In such scenarios, strong power is not required, and the frequent stop-and-go movement leads to higher fuel consumption. Enabling ECO mode not only reduces fuel consumption but also makes driving more comfortable. In a few cases, it is unnecessary to activate ECO: When the vehicle is traveling at high speeds (up to 100 km/h), even if ECO is turned on, the vehicle's computer will prioritize speed, and the ECO mode will automatically deactivate. When high torque output is needed, such as when climbing a hill, the engine computer will prioritize ensuring and providing sufficient power to drive the vehicle, and the ECO mode will automatically deactivate.
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