- #1
enkiduz190
- 10
- 0
Hi guys, i am doing some calculations on the valve spring of a 4 stroke, 4 cylinder motor vehicle engine.
To my understanding, valve bounce will occur once the valve spring is operated at a speed over their natural frequency (which i calculated to be 5500 rev/min). If i were to push the engine speed to 8000 rpm, does it mean that the valve spring won't 'bounce' since the camshaft only runs at half the engine speed? But if that was the case, why do most vehicle have red lines at 6500rpm on the rev counter? Is it really necessary to have such large safety factor?
Thanks
To my understanding, valve bounce will occur once the valve spring is operated at a speed over their natural frequency (which i calculated to be 5500 rev/min). If i were to push the engine speed to 8000 rpm, does it mean that the valve spring won't 'bounce' since the camshaft only runs at half the engine speed? But if that was the case, why do most vehicle have red lines at 6500rpm on the rev counter? Is it really necessary to have such large safety factor?
Thanks