What do FSI and TDI stand for?

FSI is a naturally aspirated engine.

TDI is a diesel supercharged engine.

Generally, the models with T are pressurized.

1. The technology is different.

TFSI is a fuel stratification injection technology that represents a future for engines.

TDI is a turbocharged direct injection (diesel engine).

2. The role is different.

FSI injects fuel directly into the combustion chamber, reducing heat loss from the engine, resulting in higher power output and lower fuel consumption, which helps with both fuel economy and power.

TDI greatly increases the inlet pressure, and the compression ratio is generally above 10, so that a large torque can be achieved at very low speeds, and the harmful particle content in the emissions is also greatly reduced due to more adequate combustion.

3. The working principle is different.

The FSI engine utilizes a high-pressure fuel pump that passes gasoline through a shunt track (common rail) to a solenoid-controlled high-pressure injector. It is characterized by the fact that a variable vortex has been generated in the intake tract, so that the intake air flow forms an optimal vortex shape into the combustion chamber, which is pushed by layered filling, so that the mixed gas is concentrated around the spark plug located in the combustion chamber**.

TDI technology allows fuel to be injected directly into the cylinder via a high-pressure injector, as the piston top shape is a recessed bowl design that forms a spiral mixture within the cylinder.

TFSI is the FSI engine with turbocharged (T), referred to as TFSI, which is generally called by Audi series models. The Volkswagen series direct-injection (I) engine with turbo (T) and mechanical (S) dual supercharging is referred to as TSI. FSI is an abbreviation for Fuel Stratified Injection, which means Fuel Stratified Injection.

Fuel stratification injection technology is a type of lean combustion technology for engines. What is lean burning? As the name suggests, the gasoline content in the engine mixture is low, and the ratio of gasoline to air can reach 1:

25 or less, so that to achieve high combustion efficiency, economical, environmental protection and other purposes.

TDI (Turbo Diesel Direct Injection Engine Used by Volkswagen Audi) TDI is the abbreviation of Turbo Direct Injection in English, which means turbocharged direct injection (diesel engine). In order to solve the congenital deficiency of SDI, people have installed a turbocharging device on the diesel engine, so that the intake pressure is greatly increased, and the compression ratio is generally more than 10, so that a large torque can be achieved at a very low speed, and because the combustion is more sufficient, the content of harmful particles in the emission is also greatly reduced.

In automobiles: TFSI – turbocharged fuel stratified injection engines.

The TFSI is actually one more T-word than the FSI, and the domestic Audi A4 uses such a TFSI engine. TDI is the abbreviation of Turbo Direct Injection in English, which means turbocharged direct injection (specifically referring to diesel engines).

The simplest is that TFSI is a gasoline supercharged engine, and TDI is a diesel supercharged engine. Domestic non-trucks, especially those with the following displacements, use very little diesel.

TFSI is a turbocharged gasoline direct injection engine, and TDI is a diesel supercharged engine.

What do the fsi, tsi and tfsi of Volkswagen's models represent?

"TDI" is the abbreviation of Turbo Direct Ion, which means turbocharged direct-injection diesel engine.

In order to solve the inherent deficiency of SDI (naturally aspirated diesel engine), Audi has installed a turbocharging device on the diesel engine, which greatly increases the intake pressure, and the compression ratio is generally more than 10, so that it can achieve a large torque at very low speeds, and because the combustion is more sufficient, the content of harmful particles in the emissions is also greatly reduced. TDI technology allows fuel to be injected directly into the cylinder via a high-pressure injector, as the top of the piston is shaped like a recessed bowl and the fuel forms a spiral-like mixture within the cylinder.

"TFSI" is an FSI engine with turbo (T), abbreviated as TFSI, which is generally called by Audi series models.

TFSI" can be said to be a combination of an FSI engine and a turbocharger. That is, turbocharger + FSI. Its T, like the T in TSI, indicates that it uses turbocharging technology, and the FSI behind it stands for Fuel Stratified Ion, and the S stands for "Layered".

The TFSI engine is both layer-injected and turbocharged and is an upgraded version of the TSI engine.

TDI diesel engine English turbo direct injection means turbocharged direct injection diesel engine, SDI is the abbreviation of Suction Derect injection, which means naturally aspirated direct injection diesel engine. The FSI engine is fuel stratified injection, and the TFSI engine is also a turbo fuel direct injection engine, and the four letters stand for turbo-chargingfuelstratifiedinjection, which can be said to be a combination of FSI engine and TSI engine. TSI technology (TwinCharger Stratified Injection) refers to dual-supercharged (turbo and mechanical turbocharger with supercharging) stratified injection technology.

Turbo Charger; super-charging at the side of the machine; Fuel injection technology

TFSI is the FSI engine with turbocharging, abbreviated as the abbreviation of English turbodirectinjection, which means turbocharged direct injection.

FSI is the English abbreviated version of FuelStratifiedInjection, which means fuel stratified injection. Fuel stratification injection technology is a technology in which the electronic injection engine uses electronic chips to accurately control the injection amount into the cylinder for combustion, so as to improve the proportion of fuel mixed with the engine, and then improve the engine efficiency. The main advantages of FSI engines over engines with conventional technology that inject fuel into the intake manifold are:

The dynamic response is good, the power and torque can be increased at the same time, and the fuel consumption can be reduced.

TFSI is the FSI engine with turbocharging, abbreviated as the abbreviation of English turbodirectinjection, which means turbocharged direct injection.

FSI is the English abbreviation of Fuel Stratified Injection, which means fuel stratified injection. Fuel stratification injection technology is a technology in which the EFI engine uses electronic chips to accurately control the injection amount into the cylinder for combustion through calculation and analysis, so as to improve the proportion of engine mixed fuel, and then improve the engine efficiency. The main advantages of FSI engines over engines with conventional technology that inject fuel into the intake manifold are:

The dynamic response is good, the power and torque can be increased at the same time, and the fuel consumption is reduced.