What is the reason why a diesel car cannot accelerate beyond 2000 RPM?

[Gilbert]

It is due to excessive carbon deposits in the engine's throttle body, which requires cleaning. Below are the relevant details: 1. Engine: An engine (Engine) is a machine capable of converting other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. Internal combustion engines typically convert chemical energy into mechanical energy. 2. Carbon deposits: Engine carbon deposits are a coking-like substance produced by unsaturated olefins and colloids in fuel under high-temperature conditions during engine operation.