How do you reduce common rail pressure?
Relieving Pressure with the Fuel Pressure Regulator
- Disconnect the negative battery cable using a wrench.
- Locate the fuel pressure regulator on the fuel rail.
- With your hand, remove the vacuum hose from the top of the fuel pressure regulator.
- Connect a hand-operated vacuum pump to the top of the pressure regulator.
How is the pressure in the common rail controlled?
Common Rail Injection System Pressure Control. Abstract: There are several approaches to control the pressure in the common rail. One early approach method was to supply more fuel than is needed to the common rail and use a pressure control valve to spill the excess fuel back to the fuel tank.
How did the common rail system get its name?
Bosch launched the first common rail system in 1997. The system is named after the shared high-pressure reservoir (common rail) that supplies all the cylinders with fuel. With conventional diesel injection systems, the fuel pressure has to be generated individually for each injection.
How does the high pressure pump in a rail system work?
The high-pressure pump compresses the fuel and supplies it in the required quantity. It constantly feeds fuel to the high-pressure reservoir (rail), thereby maintaining the system pressure. The required pressure is available even at low engine speeds, as pressure generation is not linked to the engine speed.
How does high pressure common rail affect fuel injection?
In high pressure common rail system, common-rail pressure not only determines the injection-fuel pressure, but also is the main measurement parameter of fuel-injection. The stabilization and excessive response of common-rail pressure will directly affect starting, idling and acceleration mode of diesel engine׳s dynamic performance.
Common Rail Injection System Pressure Control. Abstract: There are several approaches to control the pressure in the common rail. One early approach method was to supply more fuel than is needed to the common rail and use a pressure control valve to spill the excess fuel back to the fuel tank.
What are the pressures of a p-l-n Rail system?
In some cases, rail pressures can reach 300 MPa. Just as is the case with P-L-N systems, common rail systems are also prone to effects related to wave dynamics in the rail and in fuel lines.
What is the role of the high pressure fuel rail?
The role of the high-pressure fuel rail is to store fuel, while suppressing pressure fluctuations due to high-pressure pump oil supply and fuel injection from the injector, ensuring stable system pressure. The high-pressure oil rail is commonly owned by each cylinder, and it is the symbol of the common rail system.
What causes low pressure on a rail pump?
If the rail pressure is low, then it will report low rail pressure, and low rail pressure is normally caused by different problems. The high pressure pump creates high pressure at low volume.