LOAD SENSITIVE STEERING FOR ENERGY SAVINGS

Hydromechanical and hydrostatic power steering systems and their power requirements are described, and the three basic types of hydraulic systems (open-center, closed-center, load-sensitive) and their basic efficiency are defined. Horsepower usage and typical arrangements are described for these systems when used to provide hydraulic power for steering. The advantages of using load-sensitive power steering devices in these systems are examined, indicating any hp savings or other benefits (such as more design options). Designing the human element (i.e. operator input) into the power steering system is addressed, including the Char-Lynn load-sensing steering design in which the valve mechanism compensates for the full range required by both skilled and unskilled machine operators. To show the advantages of this design, the valve flow gain rate characteristics are described for all three hydraulic steering system types.

• Supplemental Notes:
  • Presented at SAE International Off-Highway Meeting and Exposition, Milwaukee, 8-11 September 1980. Also published in HS-030-339 (SAE-SP-469), "Energy Saving Ideas for Mobile Equipment Designers," Warrendale, Pennsylvania, 1980, pp 45-54.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Larson, B J
• Publication Date: 1980

Media Info

• Pagination: 10 p.

Subject/Index Terms

• TRT Terms: Energy conservation; Horsepower; Hydraulic equipment; Hydromechanics; Hydrostatics; Loads; Power steering; Steering systems
• Uncontrolled Terms: Energy efficiency
• Old TRIS Terms: Hydraulic systems; Load sensitive steering
• Subject Areas: Energy; Environment; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00380649
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: SAE 800995, HS-030 345
• Files: HSL, USDOT
• Created Date: Jan 30 1984 12:00AM