Invention Grant
- Patent Title: Method of controlling transmission range in response to a loss of communication with an engine and system thereof
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Application No.: US16168191Application Date: 2018-10-23
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Publication No.: US10677350B2Publication Date: 2020-06-09
- Inventor: Brent Maurer , Ryan Cummings
- Applicant: ALLISON TRANSMISSION, INC.
- Applicant Address: US IN Indianapolis
- Assignee: ALLISON TRANSMISSION, INC.
- Current Assignee: ALLISON TRANSMISSION, INC.
- Current Assignee Address: US IN Indianapolis
- Agency: Taft Stettinius & Hollister LLP
- Agent Stephen F. Rost
- Main IPC: F16H61/12
- IPC: F16H61/12 ; F16H61/16 ; F16H61/02

Abstract:
A method of controlling a multispeed transmission includes providing a transmission controller, a plurality of ranges of the transmission of which at least one of the plurality of ranges is defined as a limiting range, and a communication link. The transmission is operated in a first range of the plurality of ranges and the method includes detecting a loss of communication over the communication link between the transmission controller and another controller. The method also includes determining if the first range is defined as the limiting range when communication is lost and commanding a shift from the first range to a second range of the plurality of ranges which is not defined as the limiting range. The method further includes controlling the shift from the first range to the second range.
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