This paper extends previous development of the ALSI concept, by investigating the performance delivered with a turbocharged version of this engine. The research is based on extensive experimental rese....
Characterization of radial turbine performance is usually represented by turbine characteristics maps. These maps illustrate the relationship between the most representative variables which describe t....
As the engines of today decrease in displacement with unchanged power output, focus of today's research is on transient response. The trend of today is to use a turbocharger with high boost level. For....
A method for determining turbocharger performance on installations in an engine test bench is developed and investigated. The focus is on the mapping of compressor performance but some attention is al....
The VanDyne SuperTurbocharger (SuperTurbo) is a turbocharger with an integral Continuously Variable Transmission (CVT). By changing the gear ratio of the CVT, the SuperTurbo is able to either pull pow....
While fuel efficiency has to be improved, future Diesel engine emission standards will further restrict vehicle emissions, particularly of nitrogen oxides. Increased in-cylinder filling is recognized ....
Exhaust gas turbo-charging helps exploit the improved fuel efficiency of downsized engines by increasing the possible power density from these engines. However, turbo-charged engines exhibit poor tran....
This paper focuses on the modelling of compressor data for use in real-time engine models where speed of execution is critical. The objective of this investigation was to develop a new technique for i....
Increasing fuel economy is highly demanded because of the GHG reduction today. Turbocharged downsized engines have much attention as one of the effective technology for this demand. Turbocharged boost....
Operational ranges of compressors are limited when running at low mass flow. In particular, large pressure fluctuations occur when reaching surge that can cause rapid deterioration of the bearing syst....
Self recirculation casing treatment has been showed to be an effective technique to extend the flow range of the compressor. However, the mechanism of its surge extension on turbocharger compressor is....
In this paper, the performance of a radial turbine working under pulsatile flow conditions is computed with two different modeling approaches, time resolved 1-dimensional (1-D) and 3-dimensional (3-D)....
Prior work with the concept of dividing the exhaust process into an early and late phase has shown the potential of applying only the early stage (blow-down) of the exhaust period directly to a turboc....
The paper describes a measurement procedure to measure complete 2-stage turbo systems (TST - Two Stage Turbo) in a turbocharger test rig. The possibility to measure the complete range of operation of ....
Two-stage turbochargers are a recent solution to improve engine performance, reducing the turbo-lag phenomenon and improving the matching. However, the definition of the control system is particularly....
While turbocharging has existed for a full century, its significance has increased very rapidly in the past few decades. At the heart of good turbocharger performance is an excellent compressor stage,....