What do the three red letters in Volkswagen TSI represent?

[IsabelAnn]

When all three letters "TSI" are in red, it indicates a 2.0T turbocharged + direct fuel injection engine. When only "SI" is in red, it represents a 1.8T turbocharged + direct fuel injection engine. When only the letter "I" is in red, it signifies a 1.4T turbocharged + direct fuel injection engine. The TSI engine is a leader among 4-cylinder engines, incorporating the most advanced technology in Volkswagen's engine family. Relevant information about turbochargers is as follows: 1. Introduction: A turbocharger is essentially an air compressor that increases air intake by compressing air. 2. Working principle: It utilizes the inertial force of exhaust gases expelled by the engine to drive a turbine in the turbo chamber, which in turn drives a coaxial impeller. The impeller compresses air delivered through the air filter pipeline, pressurizing it into the cylinders. As engine speed increases, the exhaust gas velocity and turbine speed also rise proportionally, enabling the impeller to compress more air into the cylinders. Higher air pressure and density allow for more fuel combustion, and by correspondingly increasing fuel supply and adjusting engine speed, the engine's output power can be enhanced.