What causes a four-cylinder diesel engine to emit black smoke and lack power?

[JaceLynn]

Four-cylinder diesel engines emitting black smoke and lacking power are primarily caused by issues such as an overly rich air-fuel mixture, poor mixture formation, or incomplete combustion. Below is relevant information about diesel engines: 1. Concept: A diesel engine is an internal combustion engine that obtains energy by burning diesel fuel. Diesel engines offer advantages such as high power output and good fuel economy. The working process of a diesel engine shares many similarities with gasoline engines, with each operating cycle also going through four strokes: intake, compression, power, and exhaust. 2. Development prospects: The traditional image of diesel engines being heavy, noisy, and emitting black smoke has given many people a poor impression. However, after years of research and the application of new technologies, modern diesel engines are vastly different from their predecessors. Modern diesel engines typically employ technologies such as electronic control injection, common rail, and turbocharged intercooling, achieving significant breakthroughs in weight, noise, and smoke emissions, now comparable to gasoline engines.