Rattling Noise Reduction Technology for Multi Stage Hybrid Transmission

Paper #:
  • 2017-01-1157

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. Lexus brand requires extreme quietness performance for customer satisfaction. Transmission has some backlash which causes rattling noise with vibration of engine torque. This paper describes the technology to reduce rattle noise for Multi Stage Hybrid Transmission.
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