2026-09-21T13:12:43Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/22771 2023-07-10 col_2142_5131 col_2142_14847 com_2142_5130 com_2142_683 com_2142_397

Copyright 1989 Gui, Xinqun Engineering, Agricultural Engineering, Automotive Computer control of engine-transmission system for improving fuel economy text Goering, C.E. Gui, Xinqun 2011-05-07T13:50:58Z 2011-05-07T13:50:58Z 10000-01-01 1989 A control strategy for improving tractor operating efficiency was proposed in this study. The strategy is to control an engine and a continuously variable transmission (CVT) in such a way that the engine works along a line of minimum brake specific fuel consumption (BSFC). Analysis and computer simulation indicated that an engine-CVT system can operate stably and track the desired minimum BSFC curve. Fuel savings of over 25% can be achieved with the proposed control strategy, as compared to a conventional tractor. Design of the control for the engine-CVT system can be achieved by designing engine speed control and CVT ratio control independently, provided the controllers are integrated through the minimum BSFC curve. The engine-CVT system can be viewed as an augmented engine, to which a conventional power train can be added to provide a range of ground speeds. The engine-CVT system can be interpreted as an adaptive control system with the CVT ratio being updated continuously to compensate for load variations. A diesel engine was coupled to a V-belt CVT in the laboratory to validate the proposed control strategy. Test results, indeed, supported the analysis and simulation experiments. Compared to governor-controlled engines on farm tractors, fuel savings of over 15% was achieved with the prototype system, and fuel savings of over 25% could be gained with improved hardware. Made available in DSpace on 2011-05-07T13:50:58Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9010870.pdf: 4008122 bytes, checksum: 1c8c273f59a8933fae3498c2522b3dba (MD5) Previous issue date: 1989 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:59:53Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:28:17-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9010870 (UMI)AAI9010870 http://hdl.handle.net/2142/22771 eng Ph.D. Agricultural and Biological Engineering Agricultural and Biological Engineering University of Illinois at Urbana-Champaign Dissertation