Is Idle Fuel Consumption Higher or Driving Fuel Consumption Higher?
1 Answers
Car idle fuel consumption is higher than driving fuel consumption. When a car is idling, the mileage traveled per unit time is infinitely close to 0. The fuel injection amount per unit time divided by an infinitesimal value means the longer the idle time, the higher the fuel consumption. Average Fuel Consumption: The unit of average fuel consumption is L/100km, which represents the average fuel consumption per 100 kilometers. It is a significant reference for measuring how many kilometers a car can travel after a full tank of fuel, indicating the fuel consumed by the car over a specified distance of 100km. Instantaneous Fuel Consumption: The instantaneous fuel consumption of a car is the ratio of the fuel injection amount per unit time to the mileage traveled per unit time. For electronic fuel injection engines, the fuel supply pressure of the engine's fuel system is constant, and the amount of fuel injection depends on the fuel injector's pulse width. That is, the fuel injection amount per unit time equals the pulse width multiplied by the car's idle time. The level of car fuel consumption is directly related to five major factors: driving habits, the car itself, road conditions, natural wind, and environmental temperature. Specific factors that can increase car fuel consumption are as follows: Driving Habits: Aggressive driving, such as sudden acceleration, frequent overtaking, and not easing off the throttle before encountering a red light, can increase fuel consumption. The Car Itself: Cars with larger displacements generally consume more fuel than those with smaller displacements because larger displacements usually mean greater power, requiring more gasoline to burn and perform work. Cars with greater weight also have higher fuel consumption because greater weight requires more driving torque. Road Conditions: Driving on dirt roads, muddy roads, soft surfaces, or mountainous roads increases resistance and fuel consumption. Natural Wind: Driving against the wind or on windy days increases car resistance and fuel consumption. Low Environmental Temperature: When the engine block temperature is low, the gasoline injected during a cold start does not atomize easily, requiring more gasoline to be injected for combustion, thus increasing fuel consumption. Additionally, at low temperatures, the car's computer will control the engine to use higher RPMs to warm up the car, which also increases fuel consumption.
