Pressure Control in Hydraulic Power Steering Systems PDF Download

Author:
Publisher:
ISBN: 9789175194769
Category :
Languages : en
Pages : 91

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Author: Alessandro Dell'Amico
Publisher: Linköping University Electronic Press
ISBN: 9176858383
Category :
Languages : en
Pages : 209

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This thesis deals with the Electrohydraulic Power Steering system for road vehicles, using electronic pressure control valves. With an ever increasing demand for safer vehicles and fewer traffic accidents, steering-related active safety functions are becoming more common in modern vehicles. Future road vehicles will also evolve towards autonomous vehicles, with several safety, environmental and financial benefits. A key component in realising such solutions is active steering. The power steering system was initially developed to ease the driver's workload by assisting in turning the wheels. This is traditionally done through a passive open-centre hydraulic system and heavy trucks must still rely on fluid power, due to the heavy work forces. Since the purpose of the original system is to control the assistive pressure, one way would be to use proportional pressure control valves. Since these are electronically controlled, active steering is possible and with closed-centre, energy efficiency can be significantly improved on. In this work, such a system is analysed in detail with the purpose of investigating the possible use of the system for Boost curve control and position control for autonomous driving. Commercially available valves are investigated since they provide an attractive solution. A model-based approach is adopted, where simulation of the system is an important tool. Another important tool is hardware-in-the-loop simulation. A test rig of an electrohydraulic power steering system, is developed. This work has shown how proportional pressure control valves can be used for Boost curve control and position control and what implications this has on a system level. As it turns out, the valves add a great deal of time lag and with the high gain from the Boost curve, this creates a control challenge. The problem can be handled by tuning the Boost gain, pressure response and damping and has been effectively shown through simulation and experiments. For position control, there is greater freedom to design the controller to fit the system. The pressure response can be made fast enough for this case and the time lag is much less critical.

Author:
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ISBN:
Category :
Languages : en
Pages :

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A vehicle comprises a plurality of wheels attached to a vehicle housing. Also attached to the vehicle housing is a power steering system, including a fluid flow circuit, which is operably coupled to a number of the wheels. An internal combustion engine attached to the vehicle housing is connected to a hydraulically actuated system that includes a high pressure pump. An outlet of the high pressure pump is in fluid communication with the fluid flow circuit.

Author: Manfred Harrer
Publisher: Springer
ISBN: 331905449X
Category : Technology & Engineering
Languages : en
Pages : 569

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This edited volume presents basic principles as well as advanced concepts of the computational modeling of steering systems. Moreover, the book includes the components and functionalities of modern steering system, which are presented comprehensively and in a practical way. The book is written by more than 15 leading experts from the automotive industry and its components suppliers. The target audience primarily comprises practicing engineers, developers, researchers as well as graduate students who want to specialize in this field.

Author: Matthew John Blank
Publisher:
ISBN:
Category :
Languages : en
Pages : 176

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Author: https://www.chinesestandard.net
Publisher: https://www.chinesestandard.net
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 19

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This Part of QC/T 299 specifies the bench test method for automotive hydraulic steering power pumps. This Part is applicable to invariable flow pumps (hereinafter referred to as steering pumps) in conventional hydraulic power steering systems for automobiles, such as steering vane pumps and steering gear pumps.

Author: Marcus Rösth
Publisher:
ISBN: 9789185643004
Category :
Languages : en
Pages : 234

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Author: United States. Bureau of Naval Personnel
Publisher:
ISBN:
Category : Fluid power and control systems
Languages : en
Pages : 244

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Fundamentals of hydraulics and pneumatics are presented in this manual, prepared for regular navy and naval reserve personnel who are seeking advancement to Petty Officer Third Class. The history of applications of compressed fluids is described in connection with physical principles. Selection of types of liquids and gases is discussed with a background of operating temperature ranges, contamination control techniques, lubrication aspects, and safety precautions. Components in closed- and open-center fluid systems are studied in efforts to familiarize circuit diagrams. Detailed descriptions are made for the functions of fluidlines, connectors, sealing devices, wipers, backup washers, containers, strainers, filters, accumulators, pumps, and compressors. Control and measurements of fluid flow and pressure are analyzed in terms of different types of flowmeters, pressure gages, and values; and methods of directing flow and converting power into mechanical force and motion, in terms of directional control valves, actuating cylinders, fluid motors, air turbines, and turbine governors. Also included are studies of fluidics, trouble shooting, hydraulic power drive, electrohydraulic steering, and missile and aircraft fluid power systems. Illustrations for explanation use and a glossary of general terms are included in the appendix.

Author: CDX Automotive
Publisher: Jones & Bartlett Learning
ISBN: 1449697887
Category :
Languages : en
Pages : 518

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Author: United States. Patent Office
Publisher:
ISBN:
Category : Patents
Languages : en
Pages : 2640

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