In direct injection (GDI, CGI, TFSI or TBI), fuel is injected directly into the combustion chamber through an injector (located in the cylinder). This is a very favourable solution, as it allows rapid exchange of the fuel-air mixture via the piston. In addition, the injected fuel significantly lowers the temperature in the cylinder, as the cold gasoline cools the piston crown and cylinder walls, thus increasing the compression ratio, making the engine much more efficient.
Direct injection engines allow lean mixtures to be burned at low engine loads and consume significantly less fuel.
Unfortunately, the way how fuel burns in GDI leads to an excess of nitrogen oxides in the exhaust gas. Over the years, efforts have been made to eliminate this problem by introducing new methods to reduce the harmfulness of exhaust gases. There have been solutions for additional turbocharging, two-phase injectors or smaller engine displacement.
Combustion-related deposits in the combustion chamber and on the surface of the injectors, especially in GDI engines, reduce fuel flow and worsen injection performance. These deposits lead to increased fuel consumption, irregular engine running as well as higher pollutant emissions.
All this happens because the above-mentioned parts are not cleaned with the fuel as in indirect injection.
One more common problem with these engines is the LSPI effect. One of the causes of LSPI is fouling of the injectors; the other is carbon deposits on the piston crown, which are a result of the fouled injectors. The phenomenon leads to spontaneous ignition of this deposit, which causes a rapid increase in pressure in the combustion chamber. The consequence of LSPI can be severe engine failure, including piston fracture.
BIZOL GDI POWER CLEAN is a fuel additive to restore the performance of engines with gasoline direct injection: GDI, CGI, TFSI, TBI. Clean injectors are essential for the engine performance. Clogged injectors will not get the right amount of fuel it needs. The additive contains detergent based on Polyetheramine. It removes deposits and prevents the formation of residues resulting in restored engine performance. Significantly reduces the LSPI effect.
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BIZOL GDI POWER CLEAN can be used directly into the fuel tank at each service or every 10.000km. Ensure the tank is at least 1/3 full one 500 ml can is sufficient for up to 70 liters of fuel.