The Effect of Oil Entrapment in an Axial Piston Pump

Lin, S. J.; Akers, A.; Zeiger, G.

doi:10.1115/1.3140730

Cited by 13 publications

(5 citation statements)

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“…In-cylinder pressure transients in piston-type pumps have been widely investigated [23][24][25]. Nevertheless, it seems that the decompression period has not received adequate attention, especially if related to the suction efficiency of the pump.…”

Section: Effects Of Cylinder Volumes and Working Pressuresmentioning

confidence: 99%

Study of the delivery behaviour of a pump for common rail fuel injection equipment

Giuffrida

Ficarella

Laforgia

2009

Proceedings of the Institution of Mechanical Engineers, Part I:

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This work deals with the delivery flowrate of a radial piston pump for common rail fuel injection equipment. At first, attention is paid to the volumetric efficiency of the pump, presenting basic formulas and reviewing common theory. A new efficiency model is proposed and considerations regarding the pump running under large pressure differences between suction and delivery and variable driving speeds are formulated in order to realize difficulties in pump filling. Later, a numerical model simulating the working behaviour of the pump is used to investigate the effects of variable inlet pressures under high delivery pressure and different driving speeds. Comparisons between numerical results and experimental data referring to the delivery behaviour of the pump are reported, as well as in-cylinder pressure diagrams, necessary to realize filling deficiencies quickly. The flowrate delivered by the investigated pump depends on both the inlet and outlet pressures. Increasing the driving speed beyond certain values does not result in proportional flowrate at pump delivery.

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Section: Effects Of Cylinder Volumes and Working Pressuresmentioning

confidence: 99%

Study of the delivery behaviour of a pump for common rail fuel injection equipment

Giuffrida

Ficarella

Laforgia

2009

Proceedings of the Institution of Mechanical Engineers, Part I:

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“…As a result, the variation of the oil temperature within the normal operating range has no significant influence on the pump dynamic behavior, while the effect of the pump running speed is considerable. Other researchers that have contributed to this area are Lin (1985) [14], [9], Zhang (1989) [10], Kim (1987) [11] and Yamaguchi (1979) [16]. , shows a scheme of the studied pump illustrating the basic components.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Study of the Static and Dynamic Behavior of a Variable-Displacement Pump with Power Control

EI-Sayed

Rabie

El-Taher

1999

International Conference on Aerospace Sciences and Aviation Tec

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This paper deals with the static and dynamic behavior of a variable displacement bent axis axial piston pump with power controller. A mathematical model is deduced to predict the performance of the studied pump and its hydraulic servo controller. The developed model, which takes into consideration the basic pump and controller nonlinearities is used to develop a computer simulation program for the pump. The steady state flow-pressure characteristics and pump transient response are predicted by using the simulation program. The pump static and dynamic characteristics are also measured. The study showed good agreement between theoretical and experimental results. The study provides good foundation for the future work aiming at improving the pump performance by finding out optimum constructional parameters.

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“…It is known the primary cause of noise of a piston pump is the existence of the exciting force or moment due to the sudden pressure change in the cylinder chambers [1] [2]. The vibration and dynamics of axial piston pumps have been studied by many researchers [3][4] [5], and the countermeasures for reducing the pump noise have been tried by designing the port plate notch and the swash plate supporting mechanism. However, it seems their farther effects are not expected.…”

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confidence: 99%

Noise Reduction of a Variable Piston Pump With Even Number of Cylinders

Masuda

Ohuchi

1996

Proceedings of the JFPS International Symposium on Fluid Power

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In this paper, we propose a method of noise reduction for a variable displacement axial piston pump of even number of cylinders with two swash angle control cylinders. In the 8-piston pump, two exciting forces act on the upper and lower part of the swash plate at the same time when two of the rota cylinders come to the top and the bottom center respectively. To compensate the exciting moment and reduce the pump noise, the pressure in the upper side rota cylinder is lead to the lower control cylinder, and vice versa, for a short time through small orifices on the valve plate. Determining the orifice diameters properly, the compensating moment could be obtained and the noise level was reduced to 64.5dB from 71 dB under the condition of the delivery pressure of 6.9 MPa and the flow rate of 25 e /min.

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The Effect of Oil Entrapment in an Axial Piston Pump

Cited by 13 publications

References 0 publications

Study of the delivery behaviour of a pump for common rail fuel injection equipment

Study of the delivery behaviour of a pump for common rail fuel injection equipment

Experimental and Theoretical Study of the Static and Dynamic Behavior of a Variable-Displacement Pump with Power Control

Noise Reduction of a Variable Piston Pump With Even Number of Cylinders

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