Modelling and Measurement of the Transient Response of a Turbocharged SI Engine Renault SA

Format:

Conference/Event

Author/Creator:

Lefebvre, Alain, author.

Conference Name:

SAE 2005 World Congress & Exhibition (2005-04-11 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

The downsizing of spark ignition engines should be an issue to decrease the consumption and to fulfil the ACEA commitment, id est 140 g CO2/km in 2008 and maybe 120 g/km in 2012. To achieve very low specific fuel consumption, the use of very downsized engines should be a solution. However, it is well known that one problem with such engines, that means very small turbocharged engines with high specific power (up to 100 kW/l), will be the turbo lag [5-6].Different ways are possible to avoid it: some changes in intake layout, exhaust manifolds, turbo inertia, valve timings can be considered, or more sophisticated systems (such as electrically assisted compressor [3], volumetric compressor ) can be envisaged.To classify the interest of such solutions, it is very useful to compute their transient behaviour and, thus, to have accurate models to predict their impact under transient conditions like tip-in at constant speed but also tip-in on a vehicle (varying speed conditions).In this paper, we will describe first a methodology for the evaluation of such technologies on test benches under transient conditions at low-end speed. Then we will propose to describe how can be reproduced those transients by 1D software.We will show that:This calculation methodology has been developed with the GT Power 1D code. However it can be adapted to other codes

Notes:

Vendor supplied data

Publisher Number:

2005-01-0691

Access Restriction:

Restricted for use by site license