Energy conversion system

An energy conversion system adapted to convert energy from a source of pressurized fluid to a fluid system having, a reservoir, an actuator arrangement, a directional control valve mechanism operatively connected to the source of pressurized fluid and the reservoir, and a control arrangement operative to receive an input command and direct command signals representative of the input command to the directional control valve mechanism to controllably direct pressurized fluid from the source of pressurized fluid to the actuator arrangement, the energy conversion system comprises:

• a pressure sensor connected to the source of pressurized fluid and operative to direct a signal to the control arrangement that is proportional to the level of the pressure being produced by the source of pressurized fluid;
• a pressure select module arrangement having line pressure sensors operative to sense the operating pressure level in the actuator arrangement and direct the sensed pressure level to the control arrangement and first and second solenoid operated valves disposed in parallel between the directional control valve mechanism and the source of pressurized fluid;
• a power modifying unit having first and second fluid transferring devices and disposed between the second solenoid operated valve of the pressure select module arrangement, the source of pressurized fluid and the reservoir, the first and second fluid transferring devices being drivingly interconnected;
• and
• the control arrangement being operative to controllably direct pressurized fluid through the first solenoid operated valve to the actuator arrangement at a first pressure level and through the power modifying unit and the second solenoid operated valve at a second, lower pressure level.