The 4TNV98CT - NLYW engine assembly is a diesel - powered unit designed to provide the necessary power for excavator applications. This engine is a key component that drives the hydraulic systems and other mechanical functions of the excavator.
2. Engine Configuration
Cylinder Arrangement:
The engine is a four - cylinder configuration. The four - cylinder in - line design provides a balanced power output. The power strokes of the four cylinders are evenly distributed, which helps in reducing vibrations and ensures a smooth operation of the excavator.
Bore and Stroke:
The bore (cylinder diameter) of the 4TNV98CT engine is approximately 98 mm, and the stroke (piston travel distance) is around 110 mm. These dimensions determine the engine's displacement and have a significant impact on its power and torque characteristics. The displacement resulting from these dimensions is optimized for the demands of the excavator.
3. Power and Performance
Rated Power:
The engine is rated at 53.7 kW (kilowatts). This power output is achieved at a specific rotational speed. The rated power indicates the engine's capacity to perform the work required to operate the excavator's functions such as digging, lifting, and swinging.
Torque Output:
The torque output of the engine is related to the power and rotational speed through the formula . The engine is designed to provide a torque curve that offers good low - speed torque. This is crucial for the excavator's operation as it allows for effective starting and acceleration, especially when dealing with heavy loads during digging or lifting operations. The exact torque values depend on the operating conditions and the rotational speed of the engine.
Speed Range:
The operating speed range of the engine typically extends from an idle speed of around 600 - 800 revolutions per minute (rpm) to a maximum operating speed suitable for the excavator's functions. The ability to operate within this range provides flexibility. At lower speeds, it can provide the necessary power for precise and slow - moving operations, while at higher speeds, it can drive the hydraulic pumps to enable faster movements of the excavator's components.