Implementation of Torque Hole Filling for Transmission Shift Control 2018-01-1169
Torque Hole Filling (THF) is a model based approach for controlling the automatic transmission clutches and input torque during a part-pedal upshift or zero-pedal downshift. A desired transmission output torque is first calculated and then the clutches and input torque are controlled to achieve that output torque. This is a system design approach with drivability as one of the direct design objectives.
This paper presents the control design and implementation of Torque Hole Filling. First, the paper introduces the topic, defines the terms, and explains the basic operation and intended result. Next, it describes how it works with one instance of implementation and its corresponding dynamics equations, for both torque transfer and ratio change phases. Lastly but most importantly, it covers the various robustness considerations for real-world applications.
Citation: Teslak, C., Tseng, E., Cicala, S., Riedle, B. et al., "Implementation of Torque Hole Filling for Transmission Shift Control," SAE Technical Paper 2018-01-1169, 2018, https://doi.org/10.4271/2018-01-1169. Download Citation
Author(s):
Christopher Teslak, Eric Tseng, Stephen Cicala, Bradley D. Riedle, Yuji Fujii, Jianping Zhang, Chad Griffin, Joseph Slayton, Brian O'Neil
Affiliated:
Ford Motor Company
Pages: 7
Event:
WCX World Congress Experience
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Automatic transmission clutches
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