Coordinated Control of Downshift Powertrain of Combined Clutch Transmissions for Electric Vehicles

Junqiu Li and Han Wei

Mathematical Problems in Engineering, 2014, vol. 2014, 1-12

Abstract:

To improve the shift quality of electric vehicles equipped with two-gear automatic transmissions, the coordinated control of the combined clutch and the motor is proposed. The dynamic model of shift process is built up, the dynamic characteristics of each phase of downshift process are analyzed, and linear quadratic optimal control is used to optimize the shift process. As a result, the optimal trajectories of the motor torque and oil pressure of the combined clutch are obtained. Compared to the clutch control only, the simulation results indicate that shift quality is improved remarkably by employing the proposed coordinated control. Specifically, the shift jerk and sliding friction work are decreased by 43% and 44%, respectively, with accelerator pedal angle 50%. In contrast, the reduced percentages are 57% and 89% when accelerator pedal is not depressed.

Date: 2014
References: Add references at CitEc
Citations:

Downloads: (external link)
http://downloads.hindawi.com/journals/MPE/2014/963725.pdf (application/pdf)
http://downloads.hindawi.com/journals/MPE/2014/963725.xml (text/xml)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:hin:jnlmpe:963725

DOI: 10.1155/2014/963725

Access Statistics for this article

More articles in Mathematical Problems in Engineering from Hindawi
Bibliographic data for series maintained by Mohamed Abdelhakeem ().