An engine valve spring must exert a force of 300 N when the valve is closed and 500 N when the valve is open as shown in Figure 3. The maximum lift of spring is 8 mm (ymax). With a safety factor of 1.6 a. Design the wire diameter. b. Calculate the number of active coils. c. Calculate the number of total coils and the free length. d. Check the stability. Design Decisions: The spring is made of ASTM, A227, unpeened, clash allowance of 0.15, G = 79 GPa, squared and ground ends and C = 6
An engine valve spring must exert a force of 300 N when the valve is closed and 500 N when the valve is open as shown in Figure 3. The maximum lift of spring is 8 mm (ymax). With a safety factor of 1.6 a. Design the wire diameter. b. Calculate the number of active coils. c. Calculate the number of total coils and the free length. d. Check the stability. Design Decisions: The spring is made of ASTM, A227, unpeened, clash allowance of 0.15, G = 79 GPa, squared and ground ends and C = 6
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
An engine valve spring must exert a force of 300 N when the valve is closed and 500 N when
the valve is open as shown in Figure 3. The maximum lift of spring is 8 mm (ymax). With a
safety factor of 1.6
a. Design the wire diameter.
b. Calculate the number of active coils.
c. Calculate the number of total coils and the free length.
d. Check the stability.
Design Decisions: The spring is made of ASTM, A227, unpeened, clash allowance of 0.15, G
= 79 GPa, squared and ground ends and C = 6.
Transcribed Image Text:An engine valve spring must exert a force of 300 N when the valve is closed and 500 N when
the valve is open as shown in Figure 3. The maximum lift of spring is 8 mm (ymax). With a
safety factor of 1.6
a. Design the wire diameter.
b. Calculate the number of active coils.
c. Calculate the number of total coils and the free length.
d. Check the stability.
Design Decisions: The spring is made of ASTM, A227, unpeened, clash allowance of 0.15, G
= 79 GPa, squared and ground ends and C = 6.
Spring
Valve
Figure 3
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