What drives the high pressure fuel pump on a GDI engine?
What drives the high pressure fuel pump on a GDI engine?
camshaft
High-pressure GDI fuel pumps require enough power that they need to be mechanically driven by the engine. A high-pressure GDI fuel pump is typically driven by the camshaft. The pump runs when the engine runs.
What is GDI fuel pump?
High pressure gasoline direct injection (GDI) is a type of fuel injection, where gasoline is highly pressurized and delivered directly into the combustion chamber of each cylinder, rather than the standard multi-point fuel injection that delivers fuel into the intake tract or cylinder port.
What is the maximum fuel pressure of GDI system?
35 MPa
Current GDI injectors have maximum operating pressures of 35 MPa, but higher injection pressures have yielded promising reductions in particle number (PN) and improved combustion stability.
Can a high pressure fuel pump be cleaned?
If your vehicle has an electric fuel pump, you can use a fuel system cleaner to clear any sediment buildup or blockage. If you have a manual one (usually found in older model vehicles), you can actually open the pump to clear debris out of its internal filter, though that isn’t an option in most modern vehicles.
Why do high-pressure fuel pumps fail?
Fuel contamination: Fuel is jeopardized from corrosion, debris and moisture, which can all bring visible contaminants into the tank. Clogged strainers/filters: The aforementioned contaminants eventually clog critical components including strainers, filters and the fuel pump itself.
Where is the GDI pump located?
The GDI fuel pump is located outside the fuel tank and operates, as necessary, to complement the primary fuel pump.
What is the fuel pressure on a GDI fuel pump?
Fuel Pressure. 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.
What is gasoline direct injection (GDI)?
Gasoline Direct Injection (GDI) is a new technology that follows Port Fuel Injection (PFI). Instead of injecting the fuel on the back side of each intake valve for each cylinder GDI sprays directly into each cylinder. GDI uses high pressure to deliver fuel at any point on the compression stroke.
What are the basic differences between PFI and GDI engines?
But basic changes lie in Injector, Fuel Pump, Common Rail, Electronic System ETC. GDI Fuel Injectors: – As discussed earlier the fuel is injected directly into the combustion chamber in GDI. Also, the injection pressure is high as compared to the PFI engine (20MPa in GDI).
Which pumps fuel at high pressure and makes it possible?
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.
