11th International Conference on Turbochargers and by IMechE

By IMechE

The destiny industry forces and environmental concerns within the passenger motor vehicle and advertisement car zone suggest extra stringent engine downsizing is much extra accepted. for that reason, novel platforms are required to supply boosting strategies together with hybrid, electric-motor and exhaust waste power restoration platforms for top potency, reaction, reliability, sturdiness and compactness.

The present emission legislation and environmental tendencies for decreasing CO2 and gas intake are the main industry forces within the land and marine shipping industries. the interior combustion engine is the major product and downsizing, potency and economic system are the using forces for improvement for either spark ignition (SI) and compression ignition (CI) engines in either markets. destiny industry forces and environmental issues for transportation, in particular within the passenger motor vehicle, advertisement automobile and the marine sectors suggest extra stringent engine downsizing.

This overseas convention is the newest within the hugely profitable and prestigious sequence held usually on the grounds that 1978. those court cases from the Institution's hugely winning and prestigious sequence handle present and novel points of turbocharging platforms layout, boosting suggestions for engine downsizing and enhancements in potency, and current the newest learn and improvement during this transforming into and cutting edge quarter.

  • Focuses on boosting options together with hybrid, electric-motor and exhaust waste power restoration systems
  • Explores the present want for prime potency, reliability, toughness and compactness in restoration systems
  • Examines what new platforms advancements are underway

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Extra resources for 11th International Conference on Turbochargers and Turbocharging: 13-14 May 2014

Example text

On the other hand, there occurs no exhaust interference for a twin scroll, each scroll of which corresponds to a scroll connected to a two-cylinder engine. Figure 3 illustrates exhaust pulsation in a twin scroll combined with a fourcylinder engine (Engine simulation results at turbine inlet). Analysis of operation of a twin scroll shows that partial inflow from one side occurs in almost all range of engine crank angle and perfect full inflow from both sides occurs only at points where pulsation switches.

In such future test cycles, it is predicted that a driving mode with repeating acceleration from lower engine speed and deceleration will be added in consideration of driving in urban area. Therefore it will be necessary for complying with such regulations to improve fuel efficiency at lower engine speed further than ever. Improvement of fuel efficiency at lower engine speed requires enhancement of turbocharger efficiency. However, because internal flow of a twin scroll turbine was made unsteady by largely pulsing flow, it is difficult to analyze the internal flow, and also its detail has not been well understood.

The Power Ratio values were then used to generate a look-up table for the UB engine model in order to determine the transmission losses occurring between the crankshaft and the supercharger. 5 ∙ = ∙ ∙ = (4) − , , , , (6) (7) (8) The measured mass flow rate and efficiency results have been plotted in Figs. 6 & 7 and compared with those provided by EATON. From Fig. 6 it can be seen that the mass flow rate values agree well with those measured by EATON. The trend for the mass flow rate curves is consistent with the original maps from EATON and a difference in mass flow no larger than 4% could be found.

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