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Title: Method and apparatus for executing a shift in a hybrid transmission

Abstract

A method for executing a transmission shift in a hybrid transmission including first and second electric machines includes executing a shift-through-neutral sequence from an initial transmission state to a target transmission state including executing an intermediate shift to neutral. Upon detecting a change in an output torque request while executing the shift-through-neutral sequence, possible recovery shift paths are identified. Available ones of the possible recovery shift paths are identified and a shift cost for each said available recovery shift path is evaluated. The available recovery shift path having a minimum shift cost is selected as a preferred recovery shift path and is executed to achieve a non-neutral transmission state.

Inventors:
; ;
Issue Date:
Research Org.:
GM Global Technology Operations LLC (Detroit, MI)
Sponsoring Org.:
USDOE
OSTI Identifier:
1093241
Patent Number(s):
8,523,735
Application Number:
13/402,946
Assignee:
GM Global Technology Operations LLC (Detroit, MI)
DOE Contract Number:  
FC26-08NT04386
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Gupta, Pinaki, Kaminsky, Lawrence A, and Demirovic, Besim. Method and apparatus for executing a shift in a hybrid transmission. United States: N. p., 2013. Web.
Gupta, Pinaki, Kaminsky, Lawrence A, & Demirovic, Besim. Method and apparatus for executing a shift in a hybrid transmission. United States.
Gupta, Pinaki, Kaminsky, Lawrence A, and Demirovic, Besim. Tue . "Method and apparatus for executing a shift in a hybrid transmission". United States. https://www.osti.gov/servlets/purl/1093241.
@article{osti_1093241,
title = {Method and apparatus for executing a shift in a hybrid transmission},
author = {Gupta, Pinaki and Kaminsky, Lawrence A and Demirovic, Besim},
abstractNote = {A method for executing a transmission shift in a hybrid transmission including first and second electric machines includes executing a shift-through-neutral sequence from an initial transmission state to a target transmission state including executing an intermediate shift to neutral. Upon detecting a change in an output torque request while executing the shift-through-neutral sequence, possible recovery shift paths are identified. Available ones of the possible recovery shift paths are identified and a shift cost for each said available recovery shift path is evaluated. The available recovery shift path having a minimum shift cost is selected as a preferred recovery shift path and is executed to achieve a non-neutral transmission state.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {9}
}

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