Potentials of Variable Compressor Pre Swirl Devices in Consideration of Different Sealing Concepts VKA , RWTH Aachen

Format:

Conference/Event

Author/Creator:

Schnorpfeil, Schnorpfeil, author.

Contributor:

Adomeit, Philipp

Bowyer, Stephen

Pischinger, Stefan

Conference Name:

SAE 2013 World Congress & Exhibition (2013-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2013

Summary:

For turbocharged engines high specific power and torque output as well as a fast transient response are mandatory. This conflict of aims can be solved by different charging systems, for example 2-stage charging or variable turbine geometry. At the Institute for Combustion Engines (VKA) at RWTH Aachen University another alternative, the variable compressor pre swirl, was investigated for solving this conflict of aims.Based on theoretical fundamentals the potentials of a variable compressor pre swirl for transient response, low end torque, specific power output and fuel consumption were presented. These theoretical potentials were explored on turbocharger -, engine - and vehicle test bench.An extended compressor map with partial higher compressor efficiency of up to 2% was detected. The outcome of this is an increase of up to 6% in low end torque, found on engine test bench. This effect could also be validated in 1D simulation.Significantly higher TC speed is the result of throttling with pre swirl at part load, proven on vehicle test bench. In this operating condition, particular attention was paid to necessary advanced sealing concepts for turbocharger compressor side. Influences of sealing concepts on engine and turbocharger were shown and the different possible sealing concepts were evaluated

Notes:

Vendor supplied data

Publisher Number:

2013-01-0934

Access Restriction:

Restricted for use by site license