A working machine comprising a hydraulic fluid circuit an operator structure and a thermal management system. The thermal management system connects an operator structure heater and a heat exchanger arranged to selectively remove heat energy from the hydraulic fluid circuit, so as to be capable transferring heat from the hydraulic fluid to the operator structure.

A working machine comprising a hydraulic fluid circuit an operator structure and a thermal management system. The thermal management system connects an operator structure heater and a heat exchanger arranged to selectively remove heat energy from the hydraulic fluid circuit, so as to be capable transferring heat from the hydraulic fluid to the operator structure.

A working machine having a thermal management system with an energy distribution system to selectively transfer thermal energy between an operator structure and a hydraulic fluid, based on the relative values of an operator structure energy requirement and a hydraulic fluid energy requirement.

A construction machine includes: one or more hydraulic pumps discharging a working fluid; an engine supplying a rotational power to the hydraulic pumps; a hydraulic line through which the working fluid discharged by the hydraulic pumps moves; a main control valve provided on the hydraulic line and controlling supply of the working fluid to a traveling device or one or more of various working devices, which require the working fluid; a bypass cut valve provided on the hydraulic line at a lower side thereof than the main control valve to open and close the hydraulic line; an automatic warm-up switch generating a warm-up operation signal for raising a temperature of the working fluid before an operation starts; and a control device performing a warm-up operation for increasing the number of revolutions of the engine and opening the bypass cut valve to increase a flow rate along the hydraulic line, when the warm-up operation signal is received from the automatic warm-up switch.

A construction machine includes: one or more hydraulic pumps discharging a working fluid; an engine supplying a rotational power to the hydraulic pumps; a hydraulic line through which the working fluid discharged by the hydraulic pumps moves; a main control valve provided on the hydraulic line and controlling supply of the working fluid to a traveling device or one or more of various working devices, which require the working fluid; a bypass cut valve provided on the hydraulic line at a lower side thereof than the main control valve to open and close the hydraulic line; an automatic warm-up switch generating a warm-up operation signal for raising a temperature of the working fluid before an operation starts; and a control device performing a warm-up operation for increasing the number of revolutions of the engine and opening the bypass cut valve to increase a flow rate along the hydraulic line, when the warm-up operation signal is received from the automatic warm-up switch.

A hydraulic system for a working machine includes a hydraulic actuator having a first fluid chamber and a second fluid chamber, an accumulator, an outputting fluid tube to output an operation fluid, and a switching valve to be switched between a first position and a second position. The first position allows the first fluid chamber and the second fluid chamber to be communicated with the outputting fluid tube and thereby allowing a floating operation. The second position allows the first fluid chamber and the accumulator to be communicated with each other, allows the second fluid chamber and the outputting fluid tube to be communicated with each other, and thereby allows an anti-vibration operation.

A hydraulic system for a working machine includes a hydraulic actuator having a first fluid chamber and a second fluid chamber, an accumulator, an outputting fluid tube to output an operation fluid, and a switching valve to be switched between a first position and a second position. The first position allows the first fluid chamber and the second fluid chamber to be communicated with the outputting fluid tube and thereby allowing a floating operation. The second position allows the first fluid chamber and the accumulator to be communicated with each other, allows the second fluid chamber and the outputting fluid tube to be communicated with each other, and thereby allows an anti-vibration operation.

An aircraft hydraulic fluid heating system and method are disclosed. In one embodiment, pump characteristics of a hydraulic pump coupled to a reservoir are obtained. Further, total demand of the hydraulic fluid for hydraulically controlled flight controls in the aircraft is determined. Furthermore, the hydraulic fluid in the reservoir is dynamically heated based on the pump characteristics and the total demand of the hydraulic fluid.

A vehicle includes a chassis, a controllable vehicle component, a hydraulic circuit, a heater, a temperature sensor, and a controller. The hydraulic circuit includes a reservoir configured to store hydraulic fluid, a pump positioned to drive the hydraulic fluid from the reservoir and throughout the hydraulic circuit, and an actuator positioned to selectively receive the hydraulic fluid from the pump to selectively operate the controllable vehicle component. The heater is positioned to facilitate selectively heating the hydraulic fluid. The temperature sensor is positioned to acquire temperature data indicative of a temperature of the hydraulic fluid. The controller is configured to monitor the temperature of the hydraulic fluid and selectively activate at least one of the heater or the pump to thermally regulate the hydraulic fluid (i) to maintain the hydraulic fluid within a target temperature range and (ii) independent of (a) an operator input and (b) engagement of the actuator.

A vehicle includes a chassis, a controllable vehicle component, a hydraulic circuit, a heater, a temperature sensor, and a controller. The hydraulic circuit includes a reservoir configured to store hydraulic fluid, a pump positioned to drive the hydraulic fluid from the reservoir and throughout the hydraulic circuit, and an actuator positioned to selectively receive the hydraulic fluid from the pump to selectively operate the controllable vehicle component. The heater is positioned to facilitate selectively heating the hydraulic fluid. The temperature sensor is positioned to acquire temperature data indicative of a temperature of the hydraulic fluid. The controller is configured to monitor the temperature of the hydraulic fluid and selectively activate at least one of the heater or the pump to thermally regulate the hydraulic fluid (i) to maintain the hydraulic fluid within a target temperature range and (ii) independent of (a) an operator input and (b) engagement of the actuator.