New Combustion and Powertrain Control Technologies for Fun-to-Drive Dynamic Performance and Better Fuel Economy

Toyota Motor Corporation has developed a new series of engines under the Toyota New Global Architecture (TNGA) design philosophy, which aims to satisfy customer requirements for both fun-to-drive dynamic performance and better fuel economy by adopting a high-speed combustion concept to improve thermal efficiency and specific power. This new engine series achieves a maximum engine thermal efficiency of 40%, a specific power ratio of 60 kW/l, and lower emissions by combining high-speed combustion and a high compression ratio with a high-tumble intake port, high-energy ignition coil, high-pressure multi-hole nozzle direct injector, and new electrical variable valve timing (VVT). The first engine in this series is a new 4-cylinder 2.5-liter gasoline naturally aspirated engine for use in passenger cars alongside a new TNGA 8-speed automatic transmission, which was introduced for minivans and SUVs in the U.S. market in 2016. This TNGA powertrain system realizes top-class fuel economy with a direct and smooth acceleration feeling in ordinary driving situations by combining a new drive force (DF) demand control system with vehicle acceleration behavior targets.

• Record URL:
  https://doi.org/10.4271/2017-01-0589
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Itabashi, Shigeru
  • Murase, Eiji
  • Tanaka, Hiroya
  • Yamaguchi, Masaaki
  • Muraguchi, Tomokazu
• Conference:
  • WCX™ 17: SAE World Congress Experience
  • Location: Detroit Michigan, United States
  • Date: 2017-4-4 to 2017-4-6
• Publication Date: 2017-3-28

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References;
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Combustion efficiency; Comfort; Control systems; Fuel consumption; Motor vehicle dynamics; Power trains; Spark ignition engines
• Identifier Terms: Toyota automobile
• Geographic Terms: Japan
• Subject Areas: Design; Energy; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01657756
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2017-01-0589
• Files: TRIS, SAE
• Created Date: Jan 25 2018 9:31AM