Toyota’s New Hybrid Unit “L4A0”
Toyota developed a new hybrid unit “L4A0” for the new Tundra, which creates both good drivability and environmental performance. To ensure off-road, towing performance and typical truck driving characteristics, the unit is based on a transmission with a torque converter and a multi-plate lock up clutch, with a motor-generator and K0 clutch installed between the engine and transmission. The motor-generator and K0 clutch are built into a module, making it possible to create new hybrid units by combining the module with various transmissions. The unit features many different motor controls. For example, in the case of step-in acceleration input, in order to achieve the desired output torque, typically a kick-down shift is necessary [1]; however, by utilizing “L4A0” both high response and high power output is achieved even without a kick-down shift. This is accomplished by assisting the engine with the motor-generator even when the engine torque is delayed at low engine speeds. Simultaneously, this contributed to better fuel economy by allowing the engine to work at optimum speeds [1-3]. Another feature is the high-response and shock-less engine start that is achieved by cranking the engine with the motor-generator via the K0 clutch.
- Record URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
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Supplemental Notes:
- Abstract reprinted with permission of SAE International.
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Authors:
- Tan, Guodong
- Ikemura, Masashi
- Hasegawa, Yoshio
- Ohki, Takao
- Baba, Masayuki
- Nakamura, Atsuro
- Herring, Craig
- Niinomi, Atsushi
- Hamano, Makoto
- Mizoguchi, Yasuhiro
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Conference:
- WCX SAE World Congress Experience
- Location: Detroit & Online Michigan, United States
- Date: 2022-4-5 to 2022-4-7
- Publication Date: 2022-3-29
Language
- English
Media Info
- Media Type: Web
- Features: References;
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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: Clutches; Engine starters; Engines; Fuel conservation; Torque converters; Transmissions
- Subject Areas: Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 01841822
- Record Type: Publication
- Source Agency: SAE International
- Report/Paper Numbers: 2022-01-0656
- Files: TRIS, SAE
- Created Date: Apr 6 2022 2:18PM