Electro Hydraulic System Components

Electro-hydraulic systems incorporate conventional electrical and hydraulic components into one package. These components include fluid pumps, electrically controlled valves, and electrically actuated actuators. The control path between the two components is electrical. An electro-hydraulic system can also have secondary functions. It allows the user to control multiple actuators at once or split the outputs to operate them independently. The control path is usually irreversible, meaning it can only be reversed when the device requires a change in position.

The flexibility of hydraulic systems is a major selling point. A purely hydraulic system is prone to poor power management, which means it can lose up to 40% of its power in the process. By contrast, electro-hydraulic systems use a motor to control the pump rotation speed, allowing the pump to operate during both the active and passive phases of its working cycle. This is a major benefit for manufacturers and operators, as it allows them to reduce their energy bills and operate more efficiently.

The transmission control circuit 30 has two main components: a microprocessor-based memory unit 32 and a control logic. It executes the instructions stored in a memory unit 32 to control the electrohydraulic system. This component is linked to a number of signal paths 34. A transmission control circuit may not be microprocessor-based, but may have hardwired instructions or software instructions. These components are arranged in a way to reduce the amount of fluid pressure inside the vehicle.

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