Czarek_S napisał(a):
Rezonanse itp - co to jest?? chyba ktoś ci bajek naopowiadał bo tam żadnej filozfoii poza spręzynami w środku nie ma.
ja znalazłem coś takiego, byc może w audi było znacznie prostsze
nie wiem do środka nie zaglądałem
rózne rzeczy pozornie zadziwiające jak np specjalnie cieńszy wałek
napędowy skrzyni biegów do dużo mocniejszego motoru widziałem
także nie odrzucam takich rzeczy na starcie
What is the DMF's function? It is designed to isolate torsional crankshaft spikes created by high power, high torque engines including diesel engines with high compression ratios. By separating the mass of the flywheel between the engines and the transmission, torsional spikes can be isolated, eliminating potential damage to the transmission gear teeth. There are several components:
Engine-side flywheel damper springs: The damper springs that are visible on the engine side of DMF are designed to dampen heavy torsional spikes that occur when the engine's torsional frequency matches the torsional frequency of the transmission. When torsional frequencies match (have the same amplitude), severe damage can occur to the transmission if not isolated. DMF's isolate the torsional frequency match between the engine and transmission to an r.p.m. range below the operating range of the engine (usually between 200-400 r.p.m.). These damper springs only work hard when the engine passes through 200-400 r.p.m. at vehicle start up and shut down.
DMF damper springs and/or damper springs nylon retainers usually fall because the engine is not running correctly. Bad fuel injectors, worn pistol rings, bad valves, etc, will change the resonant frequency of the engine. A change in the resonant frequency of the engine can force the torsional frequency match between the engine and DMF to fall within the operating range of the engine. This forces the damper springs to work continuously, resulting in failure.
Friction Ring: The friction ring located between the inner and outer flywheel is designed to allow the inner and outer flywheel to slip. This feature saves the transmission from damage when torque loads exceed the vehicle rating of the transmission. (Read: Burnouts/high RPM shifts) The friction ring will wear out if excessive torque loads are continuously applied. Loading the vehicle beyond the rated load capacity is often the root cause of friction ring failures in DMF's.
Center Bearing: A sealed double row center ball bearing carries the load between the inner and outer halves of the DMF. The leading cause of center bearing failure is often related to out of balance vibration caused by not aligning the pressure plate with the DMF dowel pins. The center bearing may also fall if the clutch pilot bearing is destroyed by a worn transmission input shaft (see Pilot Bearing) or if the rated load/towing capacity of the vehicle is exceeded.
Pilot Bearing: The pilot bearing supplied with most DMF's is a caged needle roller bearing. If it fails, the transmission input shaft must be repaired or replaced. If the input shaft is not repaired correctly or replaced, the lack of input shaft support will result in DMF center bearing failure.