Develoment of Multi Stage Hybrid Transmission

Paper #:
  • 2017-01-1156

Published:
  • 2017-03-28
Abstract:
Toyota Motor Corporation has developed Multi Stage Hybrid System for Lexus flagship coupe LC500h, which was designed to achieve an excellent balance between fuel economy and acceleration performance. Multi Stage Hybrid Transmission has four-stage shift device straight after power split device with motor and generator. Compared with the existing Hybrid System, acceleration performance is improved by increasing driving force at low and medium vehicle speed in lower gears, and fuel economy and heat performance are improved by reducing electric loss in optimal gears depending on driving ranges. Multi Stage Transmission has employed four speed automatic gearbox with wide shift range to maximize both fuel economy and acceleration performance. It has appropriate size to be mounted in new FR platform, top level quietness in luxury vehicle class, and hydraulic control system with high response and high accuracy to accomplish excellent shift performance. This paper describes the hardware for Multi Stage Hybrid Transmission
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