What is a high pressure injector pump?
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. This setup keeps the fuel pump closely aligned with the engine.
Why do you need a high pressure fuel pump?
The purpose of the high-pressure fuel pump, in combination with the low-pressure fuel pump, is to provide gas to the vehicle’s engine from the tank. The fuel pump’s relief valve is failing to close, supplying more fuel than necessary, and reducing the vehicle’s overall fuel efficiency.
What is the pressure of fuel injection pump?
Because of the need for positive injection into a very high-pressure environment, the pump develops great pressure—typically 15,000 psi (100 MPa) or more on newer systems.
What are the two types of diesel injection pumps?
The main types of injection systems include pump-line-nozzle, unit injector, and common rail. Modern injection systems reach very high injection pressures, and utilize sophisticated electronic control methods.
What fails in a high pressure fuel pump?
1. Lack of Maintenance. The main destroyer of high-pressure fuel pumps is a lack of oil changes. Wear between the camshaft lobes and the high-pressure pump follower prevents the pump from generating enough piston movement.
What is high pressure fuel system?
That part of the aircraft’s overall fuel system that starts after the entry of fuel into the engine. An HP pump (high-pressure pump) takes fuel from the low-pressure, or aircraft, fuel system and raises its pressure sufficiently to ensure an efficient burner operation.
Is high pressure fuel pump part of engine?
The high pressure fuel pump is the piece of machinery responsible for injecting fuel into the combustion chamber of your engine, which allows your car to run more efficiently. Due to the way the engine is built, failure of the fuel pump means no fuel in the engine.
How long do high pressure fuel pumps last?
100,000 miles
How Long Do Fuel Pumps Last? Fuel pumps are not part of a regular maintenance schedule and only need to be replaced when they fail. Most fuel pumps should last well past 100,000 miles.
How does a high pressure fuel pump work?
High-pressure fuel pumps are mechanical and are typically driven by a camshaft. A lobe on the camshaft pushes on a follower or roller that moves a piston. The piston in the pump has two cycles, suction and compression.