Question

Design a close-coiled helical spring of silicon-manganese steel for the valve of an IC engine capable of exerting a net force of 65N when the valve is open and 54N when the valve is closed. The internal and external diameters are governed by space limitations, as it has to fit over bushing of 19 mm outside diameter and go inside a space of 38 mm diameter. The valve lift is 6 mm.

Answer 1

prin ninimum load = 5yN wu kneu ㅠ d3 to account fam (pale factor(K). d3 0.935 hit &tool ruth.cd, eex Can 은d)ve ttu vd.add dlistd 6- 726 I 227 2-78 2 .S 3 下u volu, á d .lylbuta ern Qs to 3 mm 'n Ond.カ togahelg equation

wath faden y K= },202.3 OLS (3)- 122 dien = N: 37.86 Taki tuoo inadi've can atthe stating and end wsizu dhamitunmm 45 N 6mm