What is the difference between TFSI and TSI?
1 Answers
The differences between TFSI and TSI are as follows: 1. Definitional differences: TSI stands for Twin-charger-Fuel-Stratified-Injection, which can be understood from the surface meaning of the letters as twin-charging + stratified combustion + injection. TSI is an extremely efficient engine form, achieving a perfect balance between power and fuel economy. TFSI is an FSI engine with turbocharging (T), abbreviated as TFSI. FSI stands for Fuel-Stratified-Injection, which means fuel stratified injection technology in Chinese. Fuel stratified injection technology is a type of engine lean-burn technology. Lean-burn means the gasoline content in the engine's air-fuel mixture is low, with a gasoline-to-air ratio that can reach 1:25 or higher. 2. Characteristic differences: Features of the TSI engine: minimal power loss, capable of achieving significant power output even with a small displacement. Features of the TFSI engine: Firstly, it reduces fuel consumption and improves emissions; secondly, it lightens the engine weight, saving fuel while lowering production costs. 3. Differences in working principles: TFSI is an FSI engine with turbocharging (T). Turbocharging uses the high-temperature, high-pressure exhaust gases from the engine to drive the turbine at high speed, which in turn drives the intake turbine to compress the intake air, increasing air density. Simultaneously, the computer controls an increase in fuel injection to match the high-density intake air, thereby improving engine efficiency without changing the displacement. TSI combines a turbocharger (Turbocharger) and a supercharger (Supercharger) in one engine. To further enhance engine efficiency, a supercharger is added to increase intake pressure at low RPMs.
