The accelerator in the automobile is connected to the throttle valve. Is air controlled or fuel controlled?

Question

as the accelarator is raised, the throttle valve is actually actuated. now, as the engine revs up, does the throttle valve open up the air supply or does it increase the amount of fuel that is being sent into the cylinder?

Answer 1

The throttle regulates air. The fuel is controlled by the computer using several sensors. They are, coolant temperature, throttle position, mass air flow or manifold absolute pressure, intake air temperature and oxygen sensor.

Answer 2

On a gasoline engine, the acellerator controls the throttle valve so it controls the air volume.

On a diesel it controls the fuel volume directly as most diesels don't have throttle valves. (A few do have a butterfly valve in the intake stream but that's to prevent runaway if oil gets into the intake stream.)

Answer 3

Both, as the throttle valve is opened to allow more air into the carburetor or cylinder an equally increased measured amount of fuel is drawn into the throat of the carburetor or injected into the cylinder to provide the proper combustion required to produce the increased power needs of the engine.

Answer 4

Generally on most of your modern injected engines. The computer moniters the position of the throttle and the amount of air entering the engine and adjusts the pulses to the injectors to increase the fuel input to match the air intake.

Answer 5

it is ocnnected to the throttle body unit unless it is carbureted, and the fuel is controlled by many different sensors, unless it is carbureted, although starting in 1980 there were some sensors on carbureted vehicles, and a computer




good luck

Answer 6

Both

Answer 7

both!