Technology: What is EMIVT

The Kinetics Drive Solutions Inc. (KDS) Electro-Mechanical IVT technology combines an electric generator and motor with a planetary gearset in a hybrid configuration. Such a device provides a dual power path through the transmission that is parallel in nature, permitting it to transfer power in any of three modes - purely electric, combined electric and mechanical, or purely mechanical.

At low output speeds, most power is transmitted electrically and a small amount mechanically. At high output speeds, all power is transmitted mechanically as the transmission “locks up” in an overdrive ratio allowing cruising speeds with low engine rpm. Between these two extremes, power is transmitted as a mixture of electric and mechanical with the ratio continually favoring mechanical power as it progresses upward through the range. Additionally, a 2 speed planetary with a speed matching shift transition is used to expand the operating range of the transmission.

pic_emivt

Improved performance over straight series hybrid (engine direct coupled for efficiency at highway / freeway speeds)

Reduction in motor size - 65% less to power equivalent vehicle

Integration benefits due to reduced number of components to install in vehicle

Can operate with high engine torque at reduced vehicle speeds continuously

Features and Benefits

  • More degrees of freedom with EMIVT due to energy storage and characteristics of electric motors
  • Savings on fuel and brakes
  • Export power generating capability
  • Noise reduction
  • Reduction in emissions
  • Ability to down-size ICE engine
  • Ability to run in zero-emission mode

Technological Advantages

  • Technology implements an advanced hybrid
    • Idle off
    • full performance electric only mode
    • ice downsizing
    • plug in capability
    • highway direct mechanical coupling
  • Robust components : two planetary gear sets / no small geared starter, simple clutches
  • Enhanced functionality : high torque at crawl speeds, ev drive, continuous power application (no shifting)
  • Potentially lower costs / faster paybacks