THE ELECTROMAGNETIC RETARDER

THE USE OF THE ELECTROMAGNETIC RETARDER FOR LOW RATE RETARDATION OF TRUCKS AND COACHES, OVER LONG PERIODS, IS DISCUSSED. THE FRICTION BRAKE IS NOT ABLE TO OPERATE FOR LONG PERIODS. AN IDEAL SUPPLEMENTARY BRAKE SHOULD BE CAPABLE OF TAKING OVER A LARGE PROPORTION OF THE BRAKING WORK IN THE BELOW - 12% BAND AND SHOULD PERFORM THIS DUTY FOR ALMOST INDEFINITE PERIODS. 3 TYPES OF SUPPLEMENTARY RETARDERS ARE CONSIDERED:- EXHAUST COMPRESSION, HYDRAULIC REACTION AND MAGNETIC BRAKES. REASONS FOR THE FIRST TWO TYPES FAILING TO REACH THE DEFINED PERFORMANCE REQUIREMENTS ARE GIVEN. THE ELECTROMAGNETIC RETARDER SATISFIES THE POWER REQUIREMENTS AND IT CAN BE DESIGNED TO PROVIDE A CONTINUOUS ENERGY ABSORPTION WITH A STABLE AND BALANCED RATE OF HEAT DISSIPATION. THE LIMITED TORQUE REDUCTION CAUSED BY HIGH TEMPERATURES CAN BE OVERCOME. THE REDUCTION IN FRICTION BRAKE WEAR ALONE JUSTIFIES THE COST OF THE ELECTROMAGNETIC RETARDER.

• Corporate Authors:

  Design Engineering Publications Limited

  89 Blackfriars Road
  London SE1,   England 
• Authors:
  • Scharff, T E
• Publication Date: 1974-9

Language

• English

Media Info

• Features: Figures;
• Pagination: p. 37
• Serial:
  • AUTOMOTIVE DESIGN ENGINEERING 1993
  • Volume: 13
  • Publisher: EDENVALE PUBLISHING LTD

Subject/Index Terms

• TRT Terms: Brakes; Braking; Buses; Electromagnetism; Electronics; Equipment; Friction; Heat; Magnetic properties; Trucks; Wear
• ITRD Terms: 1361: Brake; 1874: Braking; 6965: Electronics; 3674: Equipment; 5452: Friction; 6743: Heat; 1236: Lorry; 6936: Magnetism; 5293: Wear
• Subject Areas: Highways; Motor Carriers; Public Transportation; Safety and Human Factors; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00083263
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: May 1 1975 12:00AM