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Title: Method and apparatus for executing an asynchronous clutch-to-clutch shift in a hybrid transmission

Abstract

A hybrid transmission includes first and second electric machines. A method for operating the hybrid transmission in response to a command to execute a shift from an initial continuously variable mode to a target continuously variable mode includes increasing torque of an oncoming clutch associated with operating in the target continuously variable mode and correspondingly decreasing a torque of an off-going clutch associated with operating in the initial continuously variable mode. Upon deactivation of the off-going clutch, torque outputs of the first and second electric machines and the torque of the oncoming clutch are controlled to synchronize the oncoming clutch. Upon synchronization of the oncoming clutch, the torque for the oncoming clutch is increased and the transmission is operated in the target continuously variable mode.

Inventors:
; ; ; ; ;
Issue Date:
Research Org.:
NETL (National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV (United States))
Sponsoring Org.:
USDOE
OSTI Identifier:
1150211
Patent Number(s):
8,801,567
Application Number:
13/398,993
Assignee:
GM Global Technology Operations LLC (Detroit, MI)
DOE Contract Number:  
FC26-08NT04386
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Demirovic, Besim, Gupta, Pinaki, Kaminsky, Lawrence A., Naqvi, Ali K., Heap, Anthony H., and Sah, Jy-Jen F. Method and apparatus for executing an asynchronous clutch-to-clutch shift in a hybrid transmission. United States: N. p., 2014. Web.
Demirovic, Besim, Gupta, Pinaki, Kaminsky, Lawrence A., Naqvi, Ali K., Heap, Anthony H., & Sah, Jy-Jen F. Method and apparatus for executing an asynchronous clutch-to-clutch shift in a hybrid transmission. United States.
Demirovic, Besim, Gupta, Pinaki, Kaminsky, Lawrence A., Naqvi, Ali K., Heap, Anthony H., and Sah, Jy-Jen F. Tue . "Method and apparatus for executing an asynchronous clutch-to-clutch shift in a hybrid transmission". United States. https://www.osti.gov/servlets/purl/1150211.
@article{osti_1150211,
title = {Method and apparatus for executing an asynchronous clutch-to-clutch shift in a hybrid transmission},
author = {Demirovic, Besim and Gupta, Pinaki and Kaminsky, Lawrence A. and Naqvi, Ali K. and Heap, Anthony H. and Sah, Jy-Jen F.},
abstractNote = {A hybrid transmission includes first and second electric machines. A method for operating the hybrid transmission in response to a command to execute a shift from an initial continuously variable mode to a target continuously variable mode includes increasing torque of an oncoming clutch associated with operating in the target continuously variable mode and correspondingly decreasing a torque of an off-going clutch associated with operating in the initial continuously variable mode. Upon deactivation of the off-going clutch, torque outputs of the first and second electric machines and the torque of the oncoming clutch are controlled to synchronize the oncoming clutch. Upon synchronization of the oncoming clutch, the torque for the oncoming clutch is increased and the transmission is operated in the target continuously variable mode.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {8}
}

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