Chapter 2 Crank-connecting rod mechanism and parts Section 1 Engine body group 3.Cylinder Head and Cylinder Gasket 3.1 Cylinder head The main function of cylinder head is ⊙ to seal the upper cylinder ,and cylinder head,the piston top and part of cylinder wall constitute the combustion chamber.Its materials are mostly cast iron or aluminum for 9 casting it. Figure 2.3 Cylinder head 1.tappet hole 2.cylinder head bolt hole 3.exhaust valve seat hole 4.intake valve seat hole 5.cooling water hole 6.cooling water outflow line 7.fuel injector hole 8.airway 业机械电子工程学度 Automobile and Tractor Northwest A&F University Automobile and Tractor Northwest A&F University Chapter 2 Crank-connecting rod mechanism and parts 3. Cylinder Head and Cylinder Gasket 3.1 Cylinder head The main function of cylinder head is to seal the upper cylinder ,and cylinder head、 the piston top and part of cylinder wall constitute the combustion chamber. Its materials are mostly cast iron or aluminum for casting it. Figure 2.3 Cylinder head 1. tappet hole 2. cylinder head bolt hole 3. exhaust valve seat hole 4. intake valve seat hole 5. cooling water hole 6.cooling water outflow line 7. fuel injector hole 8. airway Section 1 Engine body group