The integrated flywheel housing is a core structural component of a diesel engine, typically used to connect the engine crankcase to the transmission, acting as a 'bridge' that encloses the flywheel and supports the starter motor and clutch. Its design integrates the flywheel mounting chamber, crankshaft through-hole, and gear housing; some models also incorporate mounting positions for the oil pump and air compressor, making it a critical hub for power transmission, structural support, and auxiliary system integration. While this component does not generate power itself, it serves as the 'energy transmission hub' between the engine and the gearbox. Its manufacturing precision and structural strength directly impact the overall drivetrain efficiency, operational stability, and service life, making it an indispensable key component of modern high-efficiency diesel engines