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Manual shifting control system and method for multi-speed automatic transmission

  • US 10,281,030 B2
  • Filed: 07/27/2016
  • Issued: 05/07/2019
  • Est. Priority Date: 07/27/2016
  • Status: Active Grant
First Claim
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1. A system for managing shift changes of a transmission of a vehicle, the system comprising:

  • a multi-speed automatic transmission including an input member and an output member operatively coupled to the input member, the multi-speed automatic transmission being configurable in a plurality of forward speed ratios between the input member and the output member, the plurality of forward speed ratios includes at least three forward speed ratios;

    a control circuit operatively coupled to the multi-speed automatic transmission, the control circuit configures the multi-speed automatic transmission to establish each of the plurality of forward speed ratios;

    an operator interface operatively coupled to the control circuit and including a transmission shift selector having at least one operator selectable shift request input;

    a plurality of operational characteristic monitors which monitor a plurality of operational characteristics related to the vehicle, the plurality of operational characteristics including a road grade characteristic, a vehicle related speed characteristic, and a throttle operator interface input characteristic, wherein the control circuit configures the multi-speed automatic transmission in a first forward speed ratio of the plurality of forward speed ratios and, in response to receiving from the operator interface a request to establish a second forward speed ratio of the plurality of forward speed ratios, the control circuit configures the multi-speed automatic transmission in the second forward speed ratio if the plurality of operational characteristics satisfy a shift criteria logic and otherwise maintains the multi-speed automatic transmission in the first forward speed ratio; and

    a first operational characteristic monitor of the plurality of operational characteristic monitors which provides an indication of a first movement characteristic of the vehicle, wherein the control circuit configures the multi-speed automatic transmission in the second forward speed ratio when the first movement characteristic has a first value and the control circuit maintains the multi-speed automatic transmission in the first forward speed ratio when the first movement characteristic has a second value, and the first movement characteristic is the road grade characteristic, the first value is above a road grade threshold, and the second value is below a road grade threshold.

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