QSK60 Diesel Engine Parts Valve Chamber Cover 4917530 For Cummins

For the 15.5:1 high compression ratio characteristics of the QSK60 engine, the valve cover adopts a three-layer composite structure:

The surface layer is made of ADC12 aluminium alloy, which is processed by micro-arc oxidation to form a 25μm ceramic layer (HV≥1200).

The middle layer has an inlaid copper-based heat dissipation grid, and its thermal conductivity is increased by 40% (compared with traditional cast iron parts).

The base material is an A356-T6 aluminium alloy body, with a yield strength of 310MPa, and it has been verified by MIL-STD-810G thermal shock.

The topology-optimised sealing groove features a wave-shaped air channel designed by CFD flow field analysis. Together with the EPDM rubber sealing ring, it can achieve 0.02mm level face pressure control.

The dynamic compensation mechanism includes an integrated coil spring-type pressure plate, which provides automatic compensation for thermal expansion deformation (compensation amount ± 0.3mm).

The multi-layer metal gasket has a stainless steel/graphite/copper three-layer composite structure and shows no leakage after 100,000 times of thermal cycle test.

For modal analysis reinforcement, based on LMS Virtual.Lab simulation, 6 variable cross-section reinforcement bars are arranged. As a result, the first-order intrinsic frequency is increased to 2800Hz (avoiding the engine operating frequency band).

The acoustic damping layer has the inner wall coated with a 2mm thick constrained damping material (loss factor η = 0.12), which reduces noise by 6dB(A).

The quick release mounting holes adopt an eccentric wheel locking mechanism, which improves the installation efficiency by 70%.

In the thermal fatigue test, the valve cover completes 2000 times of thermal shock under 200℃→450℃ cycle conditions, and there is no permanent deformation.

In the vibration durability test, a 30g vibration load is applied according to the ISO 10816-1 standard, and there is no loosening for 500 hours.

In the corrosion test, the valve cover undergoes the ASTM B117 salt spray test (1200 hours) and the CASS accelerated corrosion test (200 hours).