The concept behind the hydraulic system is to efficiently transfer mechanical power to several locations on the mobile vehicle. The combustion engine, whether diesel or gasoline, is the main power source.

Examples of pneumatic systems and components

• Air brakes on buses and trucks.
• Air brakes on trains.
• Air compressors.
• Air engines for pneumatically powered vehicles.
• Barostat systems used in Neurogastroenterology and for researching electricity.
• Cable jetting, a way to install cables in ducts.
• Dental drill.

The advantages of a hydraulic system include the ease and accuracy by which they can be controlled, and the large amounts of power they can generate. In general, hydraulic systems use fewer moving parts than some mechanical and electrical systems.

Accumulators usually are installed in hydraulic systems to store energy and to smooth out pulsations. Typically, a hydraulic system with an accumulator can use a smaller pump because the accumulator stores energy from the pump during periods of low demand.

An accumulator is a type of register included in a CPU. It acts as a temporary storage location which holds an intermediate value in mathematical and logical calculations. Intermediate results of an operation are progressively written to the accumulator, overwriting the previous value.

nitrogen

With a rise in pressure within the hydraulic system, the hydraulic accumulator collects the pressure fluid. The result: The gas is compressed. If the pressure falls, the compressed gas expands again and forces the stored fluid into the hydraulic circuit.

Telltale signs of hydraulic problems include noise, elevated temperatures and slow/erratic operation. Heat, air contamination and water contamination are the most common causes of poor hydraulic performance.

A hydraulic drive system is a drive or transmission system that uses pressurized hydraulic fluid to drive hydraulic machinery. A hydraulic drive system consists of three parts: The generator (e.g. a hydraulic pump), driven by an electric motor, a combustion engine or a windmill; valves, filters, piping etc.

PT = testing pressure of the accumulator (relative to the atmospheric pressure, namely the “relative pressure”). Usually PT = PS x 1.43. ∆P = is the difference between the maximum and minimum working pres- sure (P2-P1). Po/P2 = compression ratio.