Dynamic modelling of the turbocharged gasoline direct injection air-path using mean value and linear parameter varying models Online publication date: Tue, 13-Mar-2018
by Mohammadjavad Ghomashi; Byron Mason; Mark Cary; Kambiz Ebrahimi; Aitshaam Shahzad
International Journal of Powertrains (IJPT), Vol. 7, No. 1/2/3, 2018
Abstract: Engine behaviour can be simply defined using mean value engine models (MVEMs) as an average over one engine cycle but there are concerns about the validity of MVEM models during transient operation. In this study, the performance of MVEM is evaluated by comparing air-path dynamics during transient and steady-state operation for a turbocharged gasoline engine. The comparison is performed experimentally by the measurement of port and manifold fast pressures and calculated air mass flow during speed and torque transient tests. In addition, engine models can be linearised to facilitate rapid estimation. In this regard, a nonlinear intake manifold model is linearised and several linear parameter varying (LPV) models are formulated. Investigation of MVEM shows the transient cycles are within the steady-state range, whilst the effects of turbocharger performance are significant. The LPV modelling approach showed approximately 90% conformity between the linear and nonlinear models for estimating manifold pressure.
Online publication date: Tue, 13-Mar-2018
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Powertrains (IJPT):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email firstname.lastname@example.org