What does FSI mean?

1 Answers
MacTravis
07/29/25 8:59pm
FSI stands for Fuel-Stratified-Injection, which refers to fuel stratified injection technology. It is a type of engine technology that improves the combustion efficiency of fuel in the engine, reduces the engine's heat loss, and thus enables the engine to work more effectively. Below are the relevant details: 1. Principle of FSI technology: FSI technology uses a high-pressure fuel pump in the engine to deliver fuel through a split rail to an electromagnetically controlled high-pressure injector. This creates a vortex in the intake tract and pushes the fuel in a stratified filling manner. As a result, the air-fuel mixture ratio in the engine cylinder can reach above 1:25, making the engine work more efficiently and ultimately enhancing the vehicle's power. 2. Application of FSI technology: Most turbocharged engines on the market utilize FSI technology. It represents a milestone in engine innovation, allowing conventional engines to deliver higher performance.
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