Also, due to the length of the engine, torsional vibration in both crankshaft and camshaft can adversely affect reliability and performance at high speeds.
22.
From the outset the largest problem was torsional vibration of the crankshaft, at one time necessitating a ban on using below 4000rpm on the bench.
23.
Torsional vibration specific codes are more versatile for design and system validation purposes and can produce simulation data that can readily compared to published industry standards.
24.
Although internal combustion engines had always caused torsional vibrations in the drive train, the vibration amplitude was generally not high enough to affect durability or driver comfort.
25.
The short crankshaft length mitigates the torsional vibration problem, and secondary balance is better than in an inline 6 because there is no piston pair that move together.
26.
The power flow from the engine crankshaft to the transmission input shaft was connected via a flywheel containing a set of springs to absorb torsional vibrations at the flexplate.
27.
The load of a propeller and reduction unit can alter the resonant frequencies of the crankshaft, allowing torsional vibration to increase rapidly to high levels at certain rotational speeds.
28.
It is essential in engines with long crankshafts ( such as straight-8 engines ) and is present on most engines as it reduces torsional vibrations that tend to peak at certain speeds.
29.
In 2010, centrifugal pendulum absorbers following the patents of Sarazin and Chilton were introduced in a BMW 320D . The reason for it was again the increase in torsional vibrations from higher power engines.
30.
By interlacing firing events over all three banks of cylinders, this still leads to an even buzzing exhaust note, charge ignition occurring every 40 degrees of crankshaft revolution with consequent reduction of torsional vibration.
