What is the fuel consumption when idling with air conditioning on for a 160-horsepower engine?
1 Answers
When idling with the air conditioning on, a car consumes approximately 1 liter more fuel per hour. Here are the relevant details: Air conditioning compressor: It is directly driven by the engine crankshaft, and power is transmitted between the compressor pulley and the compressor drive shaft via an electromagnetic clutch. After pressing the A/C switch, when the interior temperature is higher than the set temperature, the electromagnetic clutch engages, and the compressor starts working. When the interior temperature is lower than the set temperature, the clutch disengages, and the compressor stops working. Fuel consumption rate: The fuel consumption rate of the engine at idle is generally about 400 grams per kilowatt-hour. Assuming the air conditioning consumes an average power of 2 kilowatts per hour, the additional fuel consumption for running the air conditioning for 1 hour would be 400 × 2 = 800 (grams); the density of gasoline is 750 grams per liter.