Heavy-Duty Vehicle Transmission Benchmarking – Volvo I-Shift 12-Speed Automated Manual Transmission

Details

• Creators:
  Wileman, Craig
• Corporate Creators:
  Southwest Research Institute
• Corporate Contributors:
  United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Vehicle Safety Research
• Subject/TRT Terms:
  • Transmission
  • Benchmarks
  • Testing
  • Torque
  • Heavy duty vehicles
  • Manual transmissions
  • Volvo
  • I-Shift
  • AT2612F
• Publication/ Report Number:
  DOT HS 813 620
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Department of Transportation. National Highway Traffic Safety Administration
• Abstract:
  The objective of this project was to evaluate and characterize the Volvo I-Shift 12-speed AMT (automated manual transmission) available for use in heavy-duty vehicles produced for the North American market. The evaluation of this transmission consisted of in-gear efficiency mapping, torque converter mapping, torque converter engagement strategy characterization, oil pump testing, parasitic loss determination, shift schedule identification with laden versus unladen shift algorithm mapping, characterization of ratio spread, and packaging envelope. The transmission benchmarking efforts undertaken as part of this project sought to provide NHTSA with powertrain data that improves vehicle modeling and standard writing activities. This report details the technological advancements of the I-Shift transmission and the empirical data collected as part of the project.
• Format:
  PDF
• Funding:
  NHTSA Contract No. GS07F6087P, Task Order No. 693JJ918F000246
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/79092/dot_79092_DS1.pdf
• File Type:
  [PDF - 1.92 MB]
• Collection(s):
  NHTSA - Vehicle Safety Research
• Main Document Checksum:
  urn:sha-512:3d9234cdbf759d35e0a8b557834214fd2cb3b5a9a98b68529691bba23271ba6712d6489e50bc3750d54e919447eceb7cc6bb9521d7c0d0e495bdf82e102208ee