Fatigue strength of valve springs

Relevant influences

• Mechanical loading as a result of compression
• Very high number of load cycles
• Increased temperature
• Dynamic settling

Experimental verification

• Tests with maximum stress almost to block length of the spring
• Vibration fatigue tests with fixed amplitudes
• Simultaneous testing of a high number of valve springs
• Simulation of increased temperature
• Statistical validation with systematic testing and a sufficient number of test items
• Determination of dynamic settling