1, most brands of automobile intake valve and exhaust valve taper angle is 45 degrees, there are a few 30 degrees, which is related to the model, is the choice of the designers, this taper angle is the sealing surface, for the same accuracy of the valve sealing surface taper angle angle comparison, from the perspective of the mechanics of the analysis, the 30-degree taper angle is more conducive to sealing than the 45-degree taper angle Favorable sealing.
2, the valve taper angle is generally 45 degrees, there can be no other angle, the valve seat actually has three taper, the mouth is 60 degrees, the middle is the sealing ring belt, is 45 degrees, the bottom is 30 degrees to ensure that 45 degrees of the sealing surface of the sealing surface of the reliable seal.
3, the valve's taper angle sector working surface and valve seat with the formation of sealing band, the main consideration of the sealing performance, ease of processing, the use of strength requirements and other aspects of the requirements of other angles can not be achieved at the existing design angle of the sealing effect.
4, the valve and the valve seat or valve seat ring by the taper seal, the valve taper surface and the valve top surface of the angle between the valve is called the valve taper angle. Intake and exhaust valve valve cone angle are generally 45 degrees, only a few engines intake valve cone angle of 30 degrees.