EXPERIMENTAL EVALUATION OF SYSTEM EFFICIENCY FOR A HYDRAULIC HYBRID ARCHITECTURE OF EXCAVATORS

Abstract

Development and research for an Open Center System (OC-System), which is typically used for excavators, has been conducted from the perspective of hydraulic efficiency. However, total system efficiency including the internal combustion engine (ICE) has not been considered thoroughly. On the other hand, a Constant Pressure System (CP-System) enabling the engine to be driven optimally is developed but is not accepted in the industry due to the complexity of the required components. Thus in this research, a hybrid system combining an OC-System with a CP-System is proposed enhancing the total system efficiency. The new system consists of an open center valve, an accumulator and a minimum of required components for the CP-System. In order to confirm the system efficiency, experiments are conducted with a test rig based on a 7t excavator. The test results lead to an estimated reduction in fuel consumption of 16 % compared to the conventional OC-System.

Recommended articles

OPTIMIZATION METHOD FOR DESIGNING OF HYDRAULIC ELEMENTS

MILADA KOZUBKOVA, JANA JABLONSKA, MARIAN BOJKO, PATRIK MARCALIK
Keywords: adjoint solver | cfd | goal function | optimization

CALCULATION OF CARBON DIFFUSION FORCEMENTATION OF GEAR WHEELS

JIRI MACHUTA, IVA NOVA, PAVEL SEVCIK
Keywords: wheels | gear | diffusion | carbon | steel | cementation

THEORETICAL AND EXPERIMENTAL ANALYSIS OF THE BEARING JOURNAL MOTION DUE TO FLUID FORCE CAUSED BY THE OIL FILM

JIRI TUMA, MILADA KOZUBKOVA, MIROSLAV PAWLENKA, MIROSLAV MAHDAL, JIRI SIMEK
Keywords: muszynska model | fluid forces | reynolds equation | journal bearings

MEASURING OF ROTARY AIR MOTORS CHARACTERISTICS

LUKAS DVORAK, KAMIL FOJTASEK
Keywords: mathematical model | measurement | air motor