Products Description
SINOTRUK Fuel Injection Pump 0445025800 202V11103-7848 0445025826 202V11103-7850
| PART NUMBER: | 202V11103-7850 0445025826 | SIZE: | |
| PART NAME: | Fuel Injection Pump | WEIGHT: | |
| TRUCK MODEL: | SINOTRUK | TERMS OF PAYMENT: | T/T ,CAD ,L/C ,WESTERN UNION |
| PACKAGE MODEL: | CARTON BOX | TERMS OF DELIEVRY: | EXW , FOB,CIF,FCA , CPT ... |
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Fuel Injection Pump 0445025800 202V11103-7848 0445025826 202V11103-7850 in a truck is the "heart"
of the diesel engine's fuel supply system.
Its core task is to generate sufficiently high fuel pressure to ensure that fuel is injected precisely and
efficiently into the cylinders for combustion.
Below, we will explain its specific functions and importance in detail:
I. Core Function: Generating High Pressure
Establishing the Pressure Required for Injection:
Modern diesel engines (especially electronically controlled engines meeting China IV, China V,
and China VI emission standards) commonly employ high-pressure common rail technology.
In order to atomize diesel fuel into extremely fine particles so that it can mix thoroughly with air and
burn completely, the injection pressure must be very high (typically 1,600 to 2,500 bar, or about 160-250 MPa,
or 23,000-36,000 psi). This pressure is far beyond what traditional mechanical pumps or low-pressure
fuel pumps can achieve.
The high-pressure fuel pump is specifically designed to compress the low-pressure fuel (typically 4-6 bar)
from the fuel pump to this extremely high pressure.
Fuel Injection Pump 0445025800 202V11103-7848 0445025826 202V11103-7850
II. Key Functions: Ensuring Precise and Efficient Combustion
Common Rail Pressure Accumulation:
In a high-pressure common rail system, the high-pressure fuel pump does not directly supply fuel to the
injectors. Instead, it pumps high-pressure fuel into a common pressure vessel called the "common rail."
Its function is to continuously supply fuel to the common rail, maintaining stable pressure within the rail,
much like a "high-pressure reservoir." This ensures that regardless of engine operating conditions
(acceleration, deceleration, idling), the injectors receive a stable and continuous supply of high-pressure
fuel from the common rail.
Achieving precise fuel injection control:
Stable high pressure is a prerequisite for precise fuel injection in electronic fuel injectors.
The engine control unit (ECU) controls the solenoid valves on the injectors to precisely control:
Injection Timing: Injecting fuel at the optimal moment.
Injection Quantity: Injecting exactly the required amount of fuel.
Injection Rate: Even multiple injections (such as pre-injection, main injection, and post-injection)
can be achieved to reduce noise and emissions.
All these delicate operations rely on a stable, high-pressure fuel supply from the high-pressure fuel pump.
III. Importance: Directly Affects Engine Performance
Improved Fuel Economy:
High pressure results in excellent fuel atomization, forming finer fuel droplets that mix more evenly with air,
thus achieving more complete combustion, improving fuel utilization, and reducing fuel consumption.
Sinotruk / Shacman / FOTON /FAW Truck Parts Original directly Sale in China .
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