Why does dirty throttle lead to high fuel consumption?

At present, the fuel injection quantity of a car is calculated by ECU according to the air intake, and the accelerator pedal actually controls the accelerator opening. A dirty throttle will increase the opening to maintain the normal intake demand, and the intake volume will increase. The intake pressure sensor is in front of the throttle, and the fuel consumption will increase.

The throttle valve is what we call a throttle valve (a device used to control the intake air). For carburetor cars, the vacuum degree of the lower part of the carburetor is controlled by the throttle opening, so as to control the air intake and oil intake; For EFI vehicles, you control the throttle position sensor or air flow sensor by stepping on the accelerator pedal, and then transmit their signals to ECU to control the fuel intake. If there is something wrong with the throttle, the working state of the engine will definitely be affected, and the fuel injection may be inaccurate, thus increasing fuel consumption. Of course, automobile fuel consumption is not only related to the performance of the engine itself, but also related to its surrounding environment, climate, driver's mental state and vehicle maintenance.