Abstract: With the increase in thermal and mechanical loads of engine, the higher standard is required for materials, and the more serious challenges had been taken for the design technique of engine. A new frame cylinder head is obtained by simulating 5 strengthened cylinder-heads. The load carrying structures, which are interdependent, are included by the stud bolts, the mounting support of fuel injector, the stiffeners of top ceiling and the fire face. The reliability test results of mechanical fatigue and thermal fatigue show that the structure of the cylinder head under peak pressure (20 MPa) is reasonable.

Key words: power machinery engineering, cylinder head, high load, aluminum, design scheme, experimental verification