Chapter 3 Ventilation system Section 1 Valve train 2.Construction of Valve Train Valve train consists oftwo parts of valve group and valve transmission group 2.1 Valve group valve、.valve seat、.valve guide pipe、valve *Cotter spring Spring seat Valve spring 00 →Valve guide pipe Valve seat Valve 机械电子工程二 Automobile and Tractor Northwest A&F University Automobile and Tractor Northwest A&F University Chapter 3 Ventilation system 2. Construction of Valve Train Valve train consists of two parts of valve group and valve transmission group． Cotter Spring seat Valve spring Valve guide pipe Valve seat Valve 2.1 Valve group valve、valve seat、valve guide pipe、valve spring． Section 1 Valve train