FIELD TESTS WITH THE CUMOLO SYSTEM - A BRAKE ENERGY RECOVER SYSTEM FOR BUSES

FAELTPROV MED CUMOLOSYSTEMET - ETT SYSTEM FOER AATERVINNING AV BROMSENERGI VID BUSSDRIFT

Over the period 1984-89, 27 Swedish buses with Cumulo brake energy recovery systems have been tested in regular service. Characteristics studied are fuel saving, reduction of harmful exhaust emissions, technical reliability and attitudes. Broad field tests were judged to be the only way to achieve representative performance results. The basic performance was studied under idealized, reproducible conditions at closed test tracks. Fuel saving was recorded as between 8 and 21%, depending on the driving conditions. Separate recordings from individual buses have indicated fuel savings of between 12 and 27%. An important observation is that greatly disturbed traffic conditions lead to less fuel saving than traffic with frequent stops but high intermediate top speeds. A general conclusion is that the amount of harmful emissions is proportional to the fuel saving. Technical reliability was not acceptable unless it was gradually improved during the tests. Noise caused special problems. As a consequence of this, a new and considerably more reliable version of the Cumulo system was designed. This in now undergoing tests in a new project. Attitudes to the system have partly been influenced by the technical shortcomings but also by the positive environmental and energy properties. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02839105
• Corporate Authors:

  Transportforksningsberedningen

  Birger Jarls Torg 5
  Stockholm,   Sweden 
• Authors:
  • Schaerlund, L
  • Skauby, S
• Publication Date: 1990

Language

• Swedish

Media Info

• Pagination: 63 p.
• Serial:
  • TFB Meddelande
  • Issue Number: 154
  • Publisher: Transportforksningsberedningen
  • ISSN: 0283-9105

Subject/Index Terms

• TRT Terms: Brakes; Buses; Fuel consumption; Traffic noise; Vehicle tests
• ITRD Terms: 1361: Brake; 1874: Braking; 5912: Elasticity; 9020: Evaluation (assessment); 5421: Force; 232: Fuel consumption; 9108: Improvement; 5412: Pressure; 6748: Sound; 5408: Speed; 6255: Test; 1333: Transmission (veh)
• Subject Areas: Energy; Highways; Public Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00619755
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Files: ITRD, TRIS
• Created Date: Mar 31 1992 12:00AM