Implement system with hydraulic start assist
A machine tool and engine technology, applied in the direction of fluid pressure actuated system components, fluid-driven starting devices, engine components, etc., can solve the problems of non-optimal, expensive, and low-efficiency systems
Active Publication Date: 2019-04-19
CATERPILLAR INC
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- Claims
- Application Information
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Problems solved by technology
[0005] While the system of the '798 publication can improve machine operation by providing momentary use of the actuator during engine start, the system still may not be optimal
Specifically, because the accumulator is dedicated to a single purpose, the system can be bulky and expensive
Also, because the accumulator is only filled with fluid from the pump, the system may be less efficient
Method used
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Embodiment Construction
[0013] figure 1 An exemplary machine 10 is illustrated having various systems and components that cooperatively excavate and load material onto a nearby hauling vehicle 12 . In the depicted example, machine 10 is a hydraulic excavator. However, it is contemplated that machine 10 may alternatively embody another excavating or material handling machine, such as a backhoe, face shovel, drag shovel, crane, or another similar machine. Machine 10 may include, among other things, an implement system 14 configured to move work implement 16 between a digging position in a trench or at a pile and a dumping position 20 (eg, over hauling vehicle 12 ). Machine 10 may also include an operator station 22 for manually controlling implement system 14 . It is contemplated that machine 10 may (if desired) perform operations other than truck loading, such as jacking, grooving, and material handling.
[0014] Implement system 14 may include linkage structures acted upon by fluid actuators to mo...
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An implement system (14) for a machine (10) having an engine (59) is disclosed. The implement system may have a pump (58) driven by an engine, a first actuator (49) configured to receive pressurized fluid from the pump during engine operation, and a first actuator (49) configured to receive pressurized fluid from the pump during engine operation. At least one second actuator (28, 36, 38) of pressurized fluid. The implement system may also have an accumulator (108) configured to receive pressurized fluid from the first actuator during engine operation and configured to provide fluid to the first actuator and the at least one third actuator when the engine is shut down. Two actuators discharge fluid.
Description
technical field [0001] The present invention relates generally to an implement system, and more particularly to an implement system with hydraulic starting assistance. Background technique [0002] Hydraulic machines, such as excavators, bulldozers, loaders, backhoes, motor graders, and other types of heavy equipment, use one or more hydraulic actuators to accomplish various tasks. These actuators are fluidly connected to the machine's engine-driven pump, which provides pressurized fluid to chambers within the actuators. As the pressurized fluid moves into or through the chamber, the pressure of the fluid acts on the hydraulic surfaces of the chamber to affect the movement of the actuator and the connected work tool. [0003] One issue associated with this type of hydraulic arrangement concerns efficiency. Specifically, there may be times when the hydraulic press is idling while still operating. For example, during a truck loading cycle, when the excavator finishes loadin...
Claims
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IPC IPC(8): E02F9/22E02F9/02
CPCF02N7/08F15B21/14F15B2211/20523F15B2211/20546F15B2211/212F15B2211/7053F15B2211/7058F15B2211/7135F15B2211/851F15B2211/853B60K2006/126F02N11/00F02N2300/2002F04B17/05B60K6/12B60W2300/17E02F3/425E02F9/2217F15B1/024Y02T10/62F04B35/002
Inventor E·A·莫里斯J·T·彼得森J·L·库恩D·陈马鹏飞
Owner CATERPILLAR INC