Modelling and Simulation of a Hydrostatic Steering System for Agricultural Tractors

Zardin, Barbara; Borghi, Massimo; Gherardini, Francesco; Zanasi, Nicholas

doi:10.3390/en11010230

Cited by 29 publications

(16 citation statements)

References 16 publications

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“…The steering consists of a dynamic hydrostatic unit, similar to the one described in [19], and it is described and analyzed with more detail in the Part 2 of this paper. The TBV task is to manage the pressure signal generated by the brake pedal, also providing the parking brake function.…”

Section: The Standard High-pressure Circuit and Its Modellingmentioning

confidence: 99%

The Hydraulic Power Generation and Transmission on Agricultural Tractors: feasible architectures to reduce dissipation and fuel consumption – Part I

et al. 2020

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This paper is aimed at investigating the benefits in terms of energy efficiency of new electro-hydraulic architectures for power distribution systems of a medium-size agricultural tractor, with a focus on the hydraulic high-pressure circuit. The work is part of a wider industrial research project called TASC (Smart and Clean Agricultural Tractors [1]). Traditional and alternative architectures have been modelled and energetically compared through simulation, using a lumped parameter approach. Experimental data previously acquired have been used to validate the models and to replicate real working conditions of the machine in the simulation environment. A typical on-field manoeuvre has been used as duty cycle, to perform an effective energetic analysis. The standard hydraulic circuit is a multi-users load sensing system that uses a single variable displacement pump to feed steering, trailer brake and auxiliary utilities in that order. The key idea of the proposed solutions is the separation of steering from the other implements, to optimize the entire energy management. In particular, the paper investigates new and flexible solutions for the auxiliary utilities, including an electro-hydraulic load sensing architecture with variable pump margin, an electronic flow matching and flow sharing architecture, and an electronic strategy for automatic pressure compensation. The simulation results show that good energy saving can be achieved with the alternative architectures, so that physical prototyping of the most promising solutions will be realized as next step of the project.

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Section: The Standard High-pressure Circuit and Its Modellingmentioning

confidence: 99%

The Hydraulic Power Generation and Transmission on Agricultural Tractors: feasible architectures to reduce dissipation and fuel consumption – Part I

et al. 2020

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“…According to the guidelines described in [43][44][45], CAD systems represent state-of-the-art tools for lowering the accessibility level and enhancing KBE in industry. Again, the development of the CAD-based approach to machine design has proven to be effective in many industrial fields for the analysis and simulation of complex machines [46][47][48][49][50][51][52]. Therefore, a DA can integrate parametric CAD modeling in order to support the selection and design of a machine subsystem.…”

Section: Computer-aided Design Archetype Toolmentioning

confidence: 99%

The Systematic Design of Industrial Products through Design Archetypes: An Application on Mechanical Transmissions

2020

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Engineering design is a knowledge intensive activity for both new and mature technical systems, such as mechanical transmissions. However, design knowledge is often transferred with conservative and unstructured approaches, although knowledge management would be of the utmost importance for modern industries. In this work, we introduce a design tool, called design archetype, for collecting and managing knowledge in systematic design processes. The design archetype addresses input design requirements for different design concepts, therefore, improving awareness of the design process by interactively modifying the design solution due to different input requirements. Finally, the design archetype updates the parameters of a first embodiment computer-aided design model of the concept. A method for the development of design archetypes is presented and applied to two case studies of mechanical transmission subassemblies. The results demonstrate the effectiveness of a systematic design method based on design archetypes stored in the company database.

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“…By increasing the original hole diameter, the highest total efficiency was on average 5% higher than the total efficiency of the original size. Finally, as an example, a very recent publication with an integrated method (lumped parameter approach using AMESim ® and flow areas calculation using Visual Basic ® ) together with a CAD method (SolidWorks ® ) was presented by Zardin et al [155] for the steering of an agricultural tractor. The understanding achieved of the system behavior allowed analyzing new designs of the rotary valves and the influence of operating parameters.…”

Section: Hydraulic Orbital Motorsmentioning

confidence: 99%

A Review of Gerotor Technology in Hydraulic Machines

2019

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Over the years, numerous investigations have established the gerotor fundamentals. This work aims to provide a complete review of the literature from the last decade, focusing on the articles published in the past five years on gerotor technology in hydraulic machines. The report gives a catalogue of guidelines based on the trochoidal-envelope definition, a background analysis, the worldwide distribution of articles in each continent and country and the most frequently used keywords in the field. The paper identifies state-of-the-art research, and reports on current mainstream ideas. From the historical background, this literature review reports the current approaches in gerotor pumps (geometry and performance approaches, modeling and numerical simulations), orbital motors and new concepts. The report will serve as a guide and a directory for novel engineers working with gerotor technology in hydraulic machines. Another intention of this paper is to disseminate the works of the researchers who use this technology around the world, and to provide a scenario for future international collaboration. The paper gives an account of the disparity between academia and engineering applications. There is currently very little published literature on design and production methodologies for gerotor pumps and orbital motors. Hence, the future goal is to collect recommendations that combine academia and industry expertise to make better use of these extensive studies in the field.

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Modelling and Simulation of a Hydrostatic Steering System for Agricultural Tractors

Cited by 29 publications

References 16 publications

The Hydraulic Power Generation and Transmission on Agricultural Tractors: feasible architectures to reduce dissipation and fuel consumption – Part I

The Hydraulic Power Generation and Transmission on Agricultural Tractors: feasible architectures to reduce dissipation and fuel consumption – Part I

The Systematic Design of Industrial Products through Design Archetypes: An Application on Mechanical Transmissions

A Review of Gerotor Technology in Hydraulic Machines

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