Pump It Up!High Pressure Injection Pump Tips
2020年11月24日The High Pressure Injection Pump is critical to this process. It is responsible for pressurizing, metering, distributing and timing the fuel delivery to the engine under each load and rpm condition. Though the nozzle actually supplies the fuel to the cylinder bore, it is the injection pump that allows that to occur.
Injection pumps have proven to be very reliable but since it is the heart of the diesel, if anything is askew the engine will not run properly and can possibly become damaged. Thus, it is prudent for every farmer to have a cursory knowledge of injection pump operation and service requirements.
Within the agricultural equipment community, a variety of different High pressure engines have been employed. Some companies produce their own engines . while others use those made by Cummins, Caterpillar or Detroit Diesel, to name a few. Regardless of the make an injection pump is part of the fuel system and can vary in style. There are two basic types of injection pumps found on farm engines. These are either an in-line or rotary distributor design.
Fuel is drawn from the fuel tank by a mechanical lift pump that is independent of the DB2 injection pump and passes through filters and then into the injection pump inlet. The fuel then flows past the inlet filter screen to the vane-operated transfer pump contained in the pump end cap. The vane-type transfer pump consists of a stationary liner and spring-loaded blades carried in slots at the rear of the transfer pump rotor. As the blades rotate in the liner they move outward and the volume increases until the leading blade passes out of registry with the inlet slot. The fuel between the blades is carried to the bottom of the transfer pump liner and enters the outlet groove. As a result, pressurized fuel is delivered through the pump into a channel to the hydraulic head passage.
The pressure regulator assembly in the transfer pump regulates fuel volume based on changes in pump speed — pressure increases with pump speed.
The advance system is a simple, direct-acting hydraulic mechanism. Powered by fuel pressure from the Injection Pump Machine the advance mechanism moves the power piston to rotate the cam to vary the delivery timing. It advances or retards the start of fuel delivery in response to engine speed changes. When engine speed decreases hydraulic pressure is reduced and the cam retards because of low transfer pressure. When engine speed increases so does the pump pressure and this moves the advance piston and cam.https://www.boyuwaterproof.com/
Injection pumps have proven to be very reliable but since it is the heart of the diesel, if anything is askew the engine will not run properly and can possibly become damaged. Thus, it is prudent for every farmer to have a cursory knowledge of injection pump operation and service requirements.
Within the agricultural equipment community, a variety of different High pressure engines have been employed. Some companies produce their own engines . while others use those made by Cummins, Caterpillar or Detroit Diesel, to name a few. Regardless of the make an injection pump is part of the fuel system and can vary in style. There are two basic types of injection pumps found on farm engines. These are either an in-line or rotary distributor design.
Fuel is drawn from the fuel tank by a mechanical lift pump that is independent of the DB2 injection pump and passes through filters and then into the injection pump inlet. The fuel then flows past the inlet filter screen to the vane-operated transfer pump contained in the pump end cap. The vane-type transfer pump consists of a stationary liner and spring-loaded blades carried in slots at the rear of the transfer pump rotor. As the blades rotate in the liner they move outward and the volume increases until the leading blade passes out of registry with the inlet slot. The fuel between the blades is carried to the bottom of the transfer pump liner and enters the outlet groove. As a result, pressurized fuel is delivered through the pump into a channel to the hydraulic head passage.
The pressure regulator assembly in the transfer pump regulates fuel volume based on changes in pump speed — pressure increases with pump speed.
The advance system is a simple, direct-acting hydraulic mechanism. Powered by fuel pressure from the Injection Pump Machine the advance mechanism moves the power piston to rotate the cam to vary the delivery timing. It advances or retards the start of fuel delivery in response to engine speed changes. When engine speed decreases hydraulic pressure is reduced and the cam retards because of low transfer pressure. When engine speed increases so does the pump pressure and this moves the advance piston and cam.https://www.boyuwaterproof.com/
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