0

Full Content is available to subscribers

Subscribe/Learn More  >

Multi-Variable Optimization on Variable Intake Valve Closing Timing System for Engine Overall Performance

[+] Author Affiliations
Zhengmao Ye, Habib P. Mohamadian

Southern University, Baton, Rouge, LA

Liguang Li

Tongji University, Shanghai, China

Paper No. ICES2005-1099, pp. 75-81; 7 pages
doi:10.1115/ICES2005-1099
From:
  • ASME 2005 Internal Combustion Engine Division Spring Technical Conference
  • ASME 2005 Internal Combustion Engine Division Spring Technical Conference
  • Chicago, Illinois, USA, April 5–7, 2005
  • Conference Sponsors: Internal Combustion Engine Division
  • ISBN: 0-7918-4184-7 | eISBN: 0-7918-3753-X
  • Copyright © 2005 by ASME

abstract

Variable valve timing (VVT) technology has a remarkable impact on engine power output, fuel economy and emission levels. To achieve a tradeoff among its potential benefits on various aspects, a novel multi-objective optimization method is proposed to complement among engine performances over entire speed-load regions. Intake valve closing (IVC) timing has been widely accepted to be the most effective means of VVT technologies. IVC timing is therefore investigated to accomplish engine overall performance optimization. The bench tests have been conducted using an introduced variable working position belt extender system. A 5-valve, double overhead cam (DOHC) spark ignition engine is selected. The sample testing data of engine power and torque outputs, fuel economy and emission levels are collected from engine bench tests, which are then interpolated with regular engine speed operating ranges via smoothing cubic spline fitting. For multi-objective control problem, principal component analysis can be conducted for the multiple-objective analysis by alternating different engine parameters, such as valve timing, sparking timing, A/F ratio, and so on. On account of the extra expense of engine experiments, a simplified optimization approach is then formulated in order to analyze the potential of IVC technology in terms of engine power output and fuel economy under constraints of emission levels at individual high speed, medium speed and low speed regions, etc. Variable IVC timing control has been shown in this research to improve engine performance throughout speed-load regions. Multi-variable optimization is also demonstrated to be feasible and effective for the optimal performance achievement on speed-load regions.

Copyright © 2005 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In