Does idling consume fuel?

[MarleyRose]

Vehicle idling consumes fuel. The fuel consumption increases when the car is idling due to the following reasons: 1. The air intake is affected: During idling, the car's air intake is affected. At this time, the car cannot inhale enough air for fuel combustion. In this state, the energy released by incomplete combustion of gasoline is far less than the heat generated when the car has sufficient air intake. However, the engine still needs to provide the energy required for the normal operation of various components of the entire vehicle, so it consumes more gasoline. 2. Torque and fuel injection increase: When idling, the engine must be ready to respond to the driver's starting operation. Starting the car changes it from a stationary state to a moving state, so the engine needs to exert more torque than during normal driving. The fuel injector sprays more fuel than during normal driving. Moreover, the engine speed increases during starting, which also increases fuel consumption.