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http://dx.doi.org/10.7839/ksfc.2019.16.4.001

Development of the HPM System to Improve Efficiency of the Hydraulic Excavator  

Kwon, Yong Cheol (Advanced Research Team, Hydraulic component business R&D Division, Doosan Corporation Mottrol BG)
Lee, Kyung Sub (Hydraulic component business R&D Division, Doosan Corporation Mottrol BG)
Kim, Sung Hun (Advanced Research Team, Hydraulic component business R&D Division, Doosan Corporation Mottrol BG)
Koo, Byoung Kook (Advanced Research Team, Hydraulic component business R&D Division, Doosan Corporation Mottrol BG)
Publication Information
Journal of Drive and Control / v.16, no.4, 2019 , pp. 1-8 More about this Journal
Abstract
The HPM (High-speed Power Matching) system is an electro-hydraulic control system. It directly controls the swash plate of the pump by selecting four-loop logic based on joystick signals, pump flow, and pressure signal to improve the efficiency and controllability of construction machines. In the NFC (Negative Flow Control) system, a typical pump control system using conventional open center type MCV, the loss is continuously generated by flow through the center bypass line even when the excavator is not in operation. Also, due to the slow response of the pump that indirectly controls the flow rate using the pressure regulator, peak pressure occurs at the start or stop of the operation. Conversely, the HPM system uses an MCV without center-by-pass flow path and the swash plate of a pump for the HPM is controlled by a high-speed proportional flow control valve. As a result, the HPM system minimizes energy loss in standby state of the excavator and enables peak pressure control through rapid electro-hydraulic control of a pump. In this paper, the concept of the HPM system algorithm is introduced and the hydraulic system efficiency is compared with the NFC system using the excavator SAT (System Analysis Tool).
Keywords
Excavator; Electro-Hydraulic Pump Control System; Closed Center Type MCV; Hydraulic System Efficiency Analysis;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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