Robert Boschgmbh

Rafael Cardoso

Enrique Busquets

Frank C Karsten

Edwin Jj Heemskerk

Shaoyang Qu

Jeremy Gruenenfelder

A construction machine including a first and second implement functions operable by a first and second actuator and a hydraulic system for controlling the actuators in response to operator controls. The hydraulic system includes a pump, a pressure line connected with the pump and pressurized by the pump, a tank line in communication with a reservoir, a first circuit including a first directional flow control valve in command of the first actuator to control the first implement function, a second circuit in parallel with the first circuit, the second circuit including a second directional flow control valve in command of the second actuator to control the second implement function, and a load sense line. The first circuit is not pressure compensated between the load sense line and the first directional control valve and the load sense line is connected to the second directional flow control valve with a pressure compensator.

Construction machine and hydraulic system thereof

A construction machine including a variable displacement pump, and a boom cylinder including a rod operable to extend and retract to move a boom of the construction machine. A first chamber of the boom cylinder is configured to be supplied with fluid from the pump during rod extension while fluid is removed from a second chamber of the boom cylinder. The second chamber of the boom cylinder is configured to be supplied with fluid from the pump during rod retraction while fluid is removed from the first chamber of the boom cylinder. The construction machine has an active ride control mode in which a valve between the boom cylinder and the pump remains open, and the pump is configured to actively damp pressure fluctuations in the boom cylinder by variation of a displacement setting.

Growing community of inventors

Fountain Inn, SC, United States of America

Rafael Cardoso