Sliding spool design for reducing the actuation forces in direct operated proportional directional valves: Experimental validation

Amirante, Riccardo; Distaso, Elia; Tamburrano, Paolo

doi:10.1016/j.enconman.2016.04.068

Cited by 71 publications

(44 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As an emerging process in the automobile industry, electronic fuel injection systems of internal combustion engine are using solenoid actuators for reduction of fuel consumption and hazardous exhaust emissions [5,6]. There are growing demands for high frequency response, reduction of actuation forces, and strong anti-pollution capabilities of electro hydraulic control system [7,8].…”

Section: Introductionmentioning

confidence: 99%

Design of a Solenoid Actuator for a Cylinder Valve in a Fuel Cell Vehicle

2016

View full text Add to dashboard Cite

Green vehicles include electric vehicles, natural gas vehicles, fuel cell vehicles (FCV), and vehicles running on fuel such as a biodiesel or an ethanol blend. An FCV is equipped with a cylinder valve installed in an ultra-high pressure vessel to control the hydrogen flow. For this purpose, an optimum design of the solenoid actuator is necessary to ensure reliability when driving an FCV. In this study, an electromagnetic field analysis for ensuring reliable operation of the solenoid actuator was conducted by using Maxwell V15. The electromagnetic field analysis was performed by magneto static technique, according to the distance between magnetic poles, in order to predict the attraction force. Finally, the attraction force was validated through comparison between the Maxwell results and measurement results. From the results, the error of attraction force ranged from 2.33 to 3.85 N at testing conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

Design of a Solenoid Actuator for a Cylinder Valve in a Fuel Cell Vehicle

2016

View full text Add to dashboard Cite

show abstract

“…In this way, very high actuation forces are generated, providing fast respond speeds and capability of shearing chips that might be jammed between the metering edges [2]. The force levels developed are much higher than proportional valves or on/off valves using solenoids to directly drive the spool [3][4][5][6][7][8][9][10], which results in a much faster response and higher shear forces. These characteristics have led to widespread use of these servovalve designs, which are fundamental components in closed-loop electro-hydraulic motion control systems demanding high performance levels, both in industrial and aeronautical applications.…”

Section: Introductionmentioning

confidence: 99%

A Novel Servovalve Pilot Stage Actuated by a Piezo-electric Ring Bender: A Numerical and Experimental Analysis

et al. 2020

Self Cite

View full text Add to dashboard Cite

Electrohydraulic servovalves are widely used for precise motion control in aerospace and other industries due to their high accuracy and speed of response. However, commercial two-stage servovalves have several undesirable characteristics, such as the power consumption caused by the quiescent flow (internal leakage) in the pilot stage, and the complexity and high number of parts of the torque motor assembly, which affect the cost and the speed of manufacture. The solution to these problems can help to reduce costs, weight and power consumption, and enhance the reliability and reproducibility as well as the performance of these valves. For these reasons, this paper proposes a novel configuration for the pilot stage: it is composed of two normally closed two-way two-position (2/2) valves actuated by two piezo-electric ring benders; the opening and closing of the two piezo-valves can generate a differential pressure to be used to control the displacement of the main spool. In this way, there is negligible quiescent flow when the main stage is at rest; in addition, the torque motor and all its components are removed. To assess the performance of this novel pilot stage concept, a prototype of the piezo-valve has been constructed and tested. The experimental results indicate that the response speed of the new piezo-valve is very high. Furthermore, a numerical model is employed to show that, by adjusting specific parameters, the performance of the piezo-valve can be further improved, so that the valve can be fully opened or closed in less than 5 ms.

show abstract

“…Then Eqs. (17) and (18) can be solved using the characteristic line method [11]. It is noted that the cross-section areas of all the pipes are the same.…”

Section: Mathematic Model Of the Systemmentioning

confidence: 99%

“…Yang et al [16] investigated the water hammer phenomenon of a tank-pipeline-valve system using three-dimensional computational fluid dynamics and studied the effects of time step on the accuracy of water hammer. Amirante et al [17] and Lisowski [18] and Filo and [19] designed the new valve port to meet the high pressure and large flow proportional valve.…”

mentioning

confidence: 99%