Optimal control of hybrid electric vehicles by considering engine and tire/road noises

Document Type : Article

Authors

1 School of Mechanical Engineering, Sharif University of Technology, Tehran, P.O. Box 11155-9567, Iran

2 Department of Mechanical Engineering, University of Alberta, Edmonton, Postal Code T6G 2R3, Canada

3 School of System Design Engineering, University of Waterloo, Waterloo, Ontario, Canada

Abstract

Along with exhaust emissions and fuel consumptions (FCs), noise emission from cars is one of the main concerns of the automotive industry. Hybridization is a promising method not only to make automobiles more environmentally-friendly, but also to reduce their noise emissions. However, a proper control design for hybrid electric vehicles (HEVs) to make noise emissions lower is still required in addition to exhaust emissions and FC reductions. In this study, we modify Equivalent Consumption Minimization Strategy (ECMS) to keep the engine noise less than tire/road noise during driving. A test bench is established for calculating the engine noise and brake specific fuel consumption. Moreover, the tire/road noise is experimentally defined as a function of the vehicle speed. It is shown that implementing the basic ECMS, the engine noise exceeds the tire/road noise in some moments of driving cycle, which is annoying to the passengers. Therefore, a modified ECMS is proposed to limit the candidate engine operating points such that the engine noise does not exceed the tire/road noise. It is shown that the engine noise level is kept below the tire/road noise level by using the modified ECMS at the expense of a very small increase in the vehicle’s FC.

Keywords

References

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Scientia Iranica
Volume 28, Issue 6 - Serial Number 6
Transactions on Mechanical Engineering (B)
November and December 2021
Pages 3129-3140

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