What Causes the Buzzing Sound When Pressing the Accelerator?

[NovaMarie]

Automobile acceleration produces a buzzing sound due to: 1. Unstable engine operation; 2. Carburetor malfunction or delayed ignition timing; 3. Excessive engine carbon buildup or poor filtration; 4. Inadequate lubrication of engine components by the oil. The accelerator, also known as the "throttle" or "butterfly valve," is the control device that regulates engine power (thrust). In piston aircraft engines, the throttle adjusts the carburetor's butterfly valve opening to control cylinder filling, thereby determining engine output. In gas turbine engines, the throttle regulates the metered fuel flow through the fuel controller, thus determining the thrust produced by the engine.