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Hybrid excavator boom actuating system and method for controlling same

一种驱动系统、机动臂的技术，应用在发动机控制、流体压力致动系统组件、机器/发动机等方向，能够解决效率低等问题，达到确保工作性能的效果

Active Publication Date: 2013-09-04
HYUNDAI DOOSAN INVIGORATE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is inefficient to use a large-capacity hydraulic pump motor in order to respond to instantaneously rising demand power / regenerative power and large oil volume.

Method used

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  • Hybrid excavator boom actuating system and method for controlling same
  • Hybrid excavator boom actuating system and method for controlling same
  • Hybrid excavator boom actuating system and method for controlling same

Examples

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Embodiment Construction

[0024] Hereinafter, preferred embodiments of a hybrid excavator arm drive system and a control method thereof according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of each line shown in the drawing, the size of the structural elements, etc. may be exaggerated for clarity and ease of presentation. In addition, the terms described later are terms defined in consideration of functions in the present invention, and may vary depending on the user's or operator's intention or custom.

[0025] figure 1 It is a structural diagram of a hybrid excavator arm drive system according to an embodiment of the present invention, figure 2 It is shown figure 1 The structure diagram of the boom up state, Figure 3 to Figure 5 It is shown figure 1 The structure diagram of the boom lowered state, Figure 6 It is a sequence diagram of a control method of a hybrid excavator arm drive system according to an embodiment of ...

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Abstract

The present invention relates to a hybrid excavator boom actuating system and to a method for controlling the same. The hybrid excavator boom actuating system comprises: an electric motor serving as a motor or a generator; an ultra capacitor for storing electrical energy generated by the electric motor; a hydraulic pump motor driven by said electric motor to supply working oil to a boom; a boom control valve which has a closed circuit for selectively connecting or disconnecting an outlet line and an inlet line of the hydraulic pump motor to or from a head or a rod side of the boom; a main pump driven by the engine to supply working oil to a bucket, a travel motor or an arm; a motor bypass valve connected to the outlet line and the inlet line to interconnect the outlet line and the inlet line or disconnect the outlet line from the inlet line; ; and a control unit for controlling the electric motor, the hydraulic pump motor, the boom control valve and the motor bypass valve. According to the present invention, the hydraulic pump motor and the system are prevented from unstably operating and an operating performance of the boom is ensured to recover regenerative energy of the boom during a boom descending operation.

Description

technical field [0001] The present invention relates to a hybrid excavator boom drive system and its control method. More specifically, a hybrid excavator that uses an electric motor to drive a hydraulic pump motor to make the boom work, and uses the electric motor to recycle the regenerative power of the boom to improve fuel consumption. Excavator arm driving system and control method thereof. Background technique [0002] Generally speaking, an excavator works with two main pumps driven by an engine and a main control valve that distributes working oil pressurized from the two main pumps to the boom, arm, bucket cylinder and swing The motor is recovered, and a plurality of slide valves are formed inside. [0003] In addition, the excavator boom driving system is configured to raise the boom when hydraulic oil is supplied to the cylinder head side of the boom cylinder by the main pump, and to lower the boom when hydraulic oil is supplied to the piston rod side of the hydra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/22F02D29/04B60K6/38
CPCE02F9/2075E02F9/2235E02F9/2282E02F9/2292E02F9/2296F15B2211/6651F15B2211/20576F15B2211/20569F15B2211/761F15B2211/20546F15B2211/30565F15B2211/20515F15B2211/88F15B21/14F15B2211/411F15B2211/30595F15B2211/41554F15B2211/7142E02F9/2289F15B2211/3058E02F9/2278
Inventor 姜秉一洪起焕
Owner HYUNDAI DOOSAN INVIGORATE CORP
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