DT SWISS O.D.L., Техническое руководство

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O.D.L - Technical Manual
8
Damping: O.D.L (OPEN, DRIVE, LOCK)
V2016.10
2.2.3 Compression - Function in Detail
When the fork deflects, the piston inside the oil chamber is pushed upwards. Some of the oil passes through a
one way valve past the piston into the lower part of the oil chamber. Thus the volume beneath the piston is
smaller than above, only part of the displaced oil can flow into the space beneath the piston. This excess oil is
pushed through the damping circuit in the upper part of the damping unit. The preloaded floating piston
creates a counter pressure to the inflowing oil.
In the «OPEN» mode (see A OPEN) the oil flows through the oil channel of the low-speed compression (LSC) and
thus over the adjusting needle, which position can be adjusted with the blue compression wheel. The position
of the adjusting needle controls the flow resistance of the oil and thus the intensity of damping. The higher the
flow resistance, the higher the damping.
Additionally, the oil flows through the oil channel of the high-speed compression (HSC). Shims are placed at the
end of the oil channel. These shims only open when a defined oil pressure is attained. Oil which cannot flow
through the oil channels of the LSC (because of fast deflection of the fork, and thus big displacement of the oil
generated by the piston), flows through the oil channels of the HSC. This ensures separate damping
characteristics on small and medium or on fast deflection speeds.
When the «DRIVE» mode is set (see A DRIVE), a slider closes the oil channel of the LSC. The entire oil flows
through the oil channels of the HSC.
When the «LOCK» mode is set (see A LOCK), a slider closes the LSC and HSC oil channel. The oil can only flow
through the blow-off channel. Shims at the end of the blow-off channel open the access to the HSC channel at
a defined oil pressure. The blow-off itself does not represent a damping function, it protects rider and material
from big hits.