吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (3): 592-598.doi: 10.13229/j.cnki.jdxbgxb201403002

• Orignal Article • Previous Articles     Next Articles

Gear position decision of automatic transmission in deceleration brake conditions

FU Yao,LEI Yu-long,LIU Hong-bo,LI Xing-zhong,LI Shun-bo   

  1. State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130022, China
  • Received:2012-10-16 Online:2014-03-01 Published:2014-03-01

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Abstract: Automatic transmission shift schedule with two parameters of the vehicle cannot adapt to the driver's intentions and change of driving conditions, and is unable to effectively use engine assisted braking in deceleration brake conditions. Based on the analysis of the necessity of engine assisted braking, a method of gear position decision is proposed, which is based on the fuzzy inference of braking duration, loads, braking deceleration, velocity. This method considers the driver's intentions and the external environment. Road tests indicate that the control strategy could adapt to the driver's intention and the external driving environment. The engine assisted braking can be used effectively. The control strategy improves driving safety of automatic transmission vehicle.

Key words: vehicle engineering, automatic transmission, shifting control strategy, deceleration brake

CLC Number: 

  • U463.2
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