Disclosed embodiments include hydraulic systems which provide power to lift, tilt and auxiliary (e.g., implement) functions, including high-flow auxiliary functions, with increased efficiency. Disclosed embodiments incorporate a single variable displacement pump that supplies pressurized fluid to a main control valve (e.g., for lift, tilt, and auxiliary functions) and a bypass circuit. The main control valve supplies fluid to control lift, tilt, and auxiliary flow for implements. The bypass circuit combines flow with the output of the auxiliary section of the main control valve to optionally provide high-flow for selected implements. The single variable displacement pump can then be set to different output flow levels, with the bypass circuit functioning differently under different conditions to optimize hydraulic flow to carryout various tasks under various conditions.

A throttle check valve includes: a poppet valve body that has an orifice formed at one end and has a hole portion formed at a side portion; a plug that has a tubular shape to surround the poppet valve body, and functions as a valve seat to come into contact with the poppet valve body; and a spring that biases the poppet valve body and the plug functioning as the valve seat in directions to come into contact with each other. When the spool is at the second position, the plug forming the distal end portion of the spool and the plug arranged in the housing come into contact with each other. The plug is provided with a protruding portion that comes into contact with the poppet valve body.

A hydraulic valve unit includes a main oil passage configured to bring a side of a master cylinder and a side of a slave cylinder to communicate with each other, and a bypass oil passage configured to bypass a valve mechanism of the main oil passage, wherein the main oil passage and a main section of the bypass oil passage are disposed to be arranged with respective axes aligned with each other, and the main section of the bypass oil passage is disposed at the same height as the main oil passage or at a position higher than that of the main oil passage in a state in which a valve body is attached at a predetermined attachment position.

In a hydraulic machine, first travel control valve and a first attachment control valve are in fluid communication with a second hydraulic source. A confluence control valve is in fluid communication with a first hydraulic source and, in a confluence position, directs fluid from the first hydraulic source to the first attachment control valve. A first signal line and a first pilot line are connected to the confluence control valve. When the first travel control valve is in a non-neutral position and the first attachment control valve is in a first non-neutral position, first signal pressure is generated in the first signal line to move the confluence control valve to the confluence position. First pilot pressure, when generated in the first pilot line, moves the confluence control valve to the confluence position.

A hydraulic system for controlling a hydraulic circuit of a working machine is disclosed. The hydraulic system can include a first hydraulic cylinder assembly, a second hydraulic cylinder assembly, a third hydraulic cylinder assembly and a valve. When coupled to the first hydraulic cylinder assembly and the second hydraulic cylinder assembly, the third hydraulic cylinder assembly can be configured to control a flow of a hydraulic fluid between the first hydraulic cylinder assembly and the second hydraulic cylinder assembly to limit an extent of travel of the first piston and an extent of travel of the second piston.

The invention relates to a hydraulic system for controlling or regulating a hydraulic cylinder comprising—at least one hydraulic cylinder, at least one hydraulic unit by means of which the hydraulic cylinder can be optionally connected to a pressure source and a tank and at least one control or regulating device for controlling or regulating the supply of hydraulic fluid to the hydraulic cylinder, the control or regulating device forms a first assembly and the hydraulic unit forms a second assembly which are structurally separate from one another and fluidically connected, wherein the supply of hydraulic fluid to the hydraulic cylinder can be predominantly controlled or regulated by the control or regulating device from outside the hydraulic unit and wherein the hydraulic unit is rigidly fastened on the hydraulic cylinder.

A passive fluidic valve for fixed flow rate distribution comprising: a hollow valve body; a valve member for blocking a passage to one of the two outlets; and communications to impose the pressure of the upstream and downstream cavities at the ends of the valve member. The valve body further comprises: an inlet; a first outlet comprising a first restriction delimiting an upstream cavity and a downstream cavity; a second outlet comprising a second restriction delimiting an upstream cavity and a downstream cavity; and a first and a second cavity. The valve member further comprises: a first end in the first cavity delimiting a first and a third chambers, and a second end in the second cavity delimiting a second and a fourth chambers.

A work machine having a cab coupled to a frame, a steering system coupled to the frame, a controller configured to selectively articulate the steering system, a joystick assembly positioned in the cab and in communication with the controller, a steering wheel assembly positioned in the cab and configured to selectively articulate the steering system, and a steering wheel sensor coupled to the steering wheel assembly and in communication with the controller to identify movement of the steering wheel assembly. Wherein, the controller does not articulate the steering system responsive to movement of the joystick assembly when the steering wheel sensor identifies movement of the steering wheel.

An adjustable ride control circuit and method that includes a head valve that controls flow between a boom cylinder head intake and an accumulator, and a rod float valve that controls flow between a boom cylinder rod intake and tank, where the rod float valve is electronically adjustable and proportionally controls flow restriction. A controller controls ride control activation, and adjustment of the head and rod float valves. When ride control is activated, the head valve allows flow between the head intake and the accumulator, and the controller automatically adjusts the rod float valve. When ride control is deactivated, the head valve blocks flow between the head intake and the accumulator, and the rod float valve blocks flow between the rod intake and tank. An enable valve can control positioning of the head valve. A flow selector can select manual or automatic adjustment of the rod float valve.

An example valve includes: a pressure compensation spool configured to be subjected to a first fluid force of fluid received at an inlet port of the valve; a sleeve having a cavity and at least one throttling cross-hole; a throttling spool disposed in the cavity of the sleeve and configured to be axially movable therein, wherein the throttling spool blocks the at least one throttling cross-hole when the valve is unactuated; and a pressure compensation chamber, wherein when the valve is actuated, the throttling spool moves in the proximal direction to form a throttling flow area between a distal end face of the throttling spool and an edge of the at least one throttling cross-hole, allowing fluid flow from the inlet port to the pressure compensation chamber, thereby causing a second fluid force to be applied on the pressure compensation spool, allowing flow to an outlet port of the valve.