How does a GDI fuel pump work?
The fuel rail pressure in a GDI engine is provided by a cam-driven variable stroke high pressure fuel pump. In typical designs, the volume of fuel pumped is controlled by a Flow Control Valve (FCV) located on the inlet of the pump. The GDI fuel pump thus delivers no fuel to the fuel rail. …
At what fuel pressure are GDI engines running?
Gasoline Direct Injection (GDI) is characterized by a high-pressure fuel injection directly into the combustion chamber. Low Pressure fuel is supplied from the fuel tank by an electrically operated fuel pump at a pre-delivery pressure of 3 to 5 bar (43 to 73 psi) to the high-pressure pump.
What is the maximum fuel pressure of GDI system?
Current gasoline injectors are already operating at a pressure of up to 35 MPa and an elevation is still promising lower particle emissions and increased efficiency. There have been only few studies of GDI sprays at pressures >50 MPa published. Contrary, in diesel engines injection pressure up to 250 MPa are common.
What’s the pressure on a GDI fuel pump?
GDI equipped vehicles use a standard. fuel pump and fuel tank to deliver the fuel to the high pressure pump. Fuel pressure on the low side ranges from 50 to 60 psi. The high pressure pump, which is camshaft driven, produces the pressures needed to overcome the high compression pressures.
How does gasoline direct injection ( GDI ) engine work?
Also in GDI engine, the injectors are placed directly into the combustion Chambers which mean the injectors have to face high temperature of combustion which PFI injector is safe from. GDI Fuel Pump: – The fuel pump used in the PFI system is of low pressure. Whereas the one used in GDI Engine is of a high-pressure type.
Is there a problem with a GDI engine?
Nor would any fuel additive. The carbon problem comes from the system that allows a bit of spent exhaust fuel to be drawn into the induction system to prevent cylinder temps from getting too high.
Which is fuel pump pumps fuel at high pressure?
Which pumps fuel at high pressure and makes it possible to be injected directly into the combustion chamber. Common Rail: Because of high strength materials of the common rail. It is used in GDI System, which is able to bear the high pressures generated by the GDI Fuel pump.