It is preferable that power steering permits 'static park' and has a good 'road feel' when running. In order to permit 'static park', a large bore actuation cylinder with high flow pump is required. Such a method, however, has two defects, a loss power for driving a large volume pump and a poor 'road feel'. Resolving these problems and achieving the above matters, Hino has developed a load sensing power steering system. This system, which employes two actuation cylinders controlled by means of a unique load sensing valve arrangement, is designed to permit use of only one cylinder for highway speeds and both cylinders during a static park maneuver. When the system is combined with the preceding speed sensing power steering, 'static park' is further facilitated and a tasty 'road feel' is available in accordance with vehicle speed.
Load and/or speed sensing power steering for medium and heavy trucks
Last- und/oder geschwindigkeitsabhaengige Servolenkung fuer mittlere und schwere Lastkraftwagen
SAE-Papers ; 1-7
1985
7 Seiten, 16 Bilder, 2 Quellen
Conference paper
English
Load and/or Speed Sensing Power Steering for Medium and Heavy Trucks
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