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Transmission with a mode selection apparatus

  • US 10,086,686 B2
  • Filed: 01/14/2016
  • Issued: 10/02/2018
  • Est. Priority Date: 01/14/2016
  • Status: Active Grant
First Claim
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1. A transmission comprising:

  • an input shaft, a first range shaft, a second range shaft, and an output shaft;

    a low range gearing and a high range gearing operably connected to the input shaft;

    a low range clutch having an engaged condition which operably connects the low range gearing to the first range shaft;

    a high range clutch having an engaged condition which operably connects the high range gearing to the second range shaft;

    a first range gear operably connected to one of the first range shaft and the second range shaft, the first range gear engaged with a second range gear operably connected to the output shaft;

    a first synchronizer and a second synchronizer each having a first engaged condition;

    a first mode which includes the low range clutch in the engaged condition and the first synchronizer in the first engaged condition causing the output shaft to rotate relative to the first range shaft based upon a ratio of the first range gear to the second range gear;

    a second mode which includes the high range clutch in the engaged condition and the second synchronizer in the first engaged condition causing the output shaft to rotate relative to the second range shaft based upon a ratio of the first range gear to the second range gear;

    a shift from the first mode to the second mode which includes engaging the second synchronizer in the first engaged condition before disengaging the low range clutch and engaging the high range clutch.

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