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Spring loaded hydraulic suspensions are the conventional dampers used in two wheelers since ages, very limited change has been seen in the regular spring loaded shock absorbers. Apart from its Monoshock avatar the dual shock absorbers are seen quite conventionally as rear shock-ups in motorcycles.
The conventional spring loaded hydraulic type suspensions work on the principle of Hydraulics. In simpler terms the functioning of the damper is based on ‘fluid’ and in the case of suspension it is the ‘Damping Oil’ that is present inside the suspension. The suspension is consists of the outer most spring, which is responsible for taking back the entire suspension unit to its original shape after it gets compressed due to uneven surface.
The next part comes is the body of the damper which is a tube like structure filled with Damping oil. Inside the tube there is the piston for up and down movement sealed by an air tight oil seal. It is this collective damping unit which is responsible for taking the toll of the external jerks.
There are valves fitted to the piston which move up and down alongside the piston, these valves contain holes and therefore when the piston moves inside the tube filled with damping oil, the oil gets partially compressed and partially it passes out through the holes present at the valves. This controlled movement of piston ensures efficient damping effect which later came back to its original position with the help of external spring fitted to the damping unit. This is how a typical spring loaded hydraulic damper works, but there is one drawback associated with the Damping oil used in the suspension.
A small piggyback canister is attached with the regular spring loaded suspension, this can is filled with pressurized gas and normally Nitrogen is used and therefore the name “Nitrox” comes into existence. The purpose of the pressurized gas is to keep the damping oil also pressurized so that the gas molecules in the oil remain strongly bonded with the oil molecules even in the most stressful working conditions.
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