11-09-2005, 13:46 PM
Piduriõlidest!!
Strengths:
1) It has a high boiling point since it does not absorb water. Therefore, there\'s no so-called wet boiling point.
2) Doesn\'t absorb moisture.
3) Doesn\'t remove paint.
4) The viscosity is more stable over the extremes of temperature.
5) With the exception of some formulations used in external boots, silicone brake fluid is compatible with all standard brake components.
Drawbacks:
1) It\'s hard to pour without entraining air bubbles--hence an application will generally have a softer, spongier pedal feel.
2) It doesn\'t absorb water, so any water already in the system accu-mulates in the lowest point of the system and stays there, causing rust.
3) Glycol fluids begin to compress near their boiling points, whereas silicone fluids begin to compress at around 300-350 degrees Fahrenheit.
4) Additives in the fluid can vaporize at comparatively moderate temperature, increasing the spongy feel.
5) Silicone fluids expand significantly when hot.
6) Silicone fluid is functionally incompatible with systems that have held glycol-based fluids for any length of time, requiring flushing and seal replacement (there are counter opinions on this, which state that the modern silicone formulations are in fact compatible with only a flushing, rather than a complete reseal). The actual DOT specification requires chemical compatibility, so as far as that goes, the two fluids won\'t cause reactions if used in the same system, but they certainly won\'t mix, either.
7) It\'s pretty much incompatible with anti-lock brakes because the silicone fluids tend to be more viscous, which can cause problems with the timing of the pulses that are intended to work with the thinner glycol-base fluid. This sometimes leads to damage of the ABS valving. The rapid pulsing necessary to anti-lock functions tend to cavitate the fluid, as the tiny bubbles collapse and coalesce into larger ones, and then collapse and reform into smaller ones. This tends to counteract the ABS effect and can diminish the actual effective braking. This condition also heats the fluid and can lead to even more sponginess and possible damage to the ABS controller. Thirdly, silicone brake fluid tends to foam when expressed from a small orifice under pressure, reducing its hydraulic effectiveness greatly.
Eks igaüks nopib siit oma tõeterad.
Strengths:
1) It has a high boiling point since it does not absorb water. Therefore, there\'s no so-called wet boiling point.
2) Doesn\'t absorb moisture.
3) Doesn\'t remove paint.
4) The viscosity is more stable over the extremes of temperature.
5) With the exception of some formulations used in external boots, silicone brake fluid is compatible with all standard brake components.
Drawbacks:
1) It\'s hard to pour without entraining air bubbles--hence an application will generally have a softer, spongier pedal feel.
2) It doesn\'t absorb water, so any water already in the system accu-mulates in the lowest point of the system and stays there, causing rust.
3) Glycol fluids begin to compress near their boiling points, whereas silicone fluids begin to compress at around 300-350 degrees Fahrenheit.
4) Additives in the fluid can vaporize at comparatively moderate temperature, increasing the spongy feel.
5) Silicone fluids expand significantly when hot.
6) Silicone fluid is functionally incompatible with systems that have held glycol-based fluids for any length of time, requiring flushing and seal replacement (there are counter opinions on this, which state that the modern silicone formulations are in fact compatible with only a flushing, rather than a complete reseal). The actual DOT specification requires chemical compatibility, so as far as that goes, the two fluids won\'t cause reactions if used in the same system, but they certainly won\'t mix, either.
7) It\'s pretty much incompatible with anti-lock brakes because the silicone fluids tend to be more viscous, which can cause problems with the timing of the pulses that are intended to work with the thinner glycol-base fluid. This sometimes leads to damage of the ABS valving. The rapid pulsing necessary to anti-lock functions tend to cavitate the fluid, as the tiny bubbles collapse and coalesce into larger ones, and then collapse and reform into smaller ones. This tends to counteract the ABS effect and can diminish the actual effective braking. This condition also heats the fluid and can lead to even more sponginess and possible damage to the ABS controller. Thirdly, silicone brake fluid tends to foam when expressed from a small orifice under pressure, reducing its hydraulic effectiveness greatly.
Eks igaüks nopib siit oma tõeterad.