Coupling of a KERS Powertrain and a 4 Litre Gasoline Engine for Improved Fuel Economy in a Full Size Car

Paper #:
  • 2010-01-2218

Published:
  • 2010-10-25
DOI:
  • 10.4271/2010-01-2218
Citation:
Boretti, A., "Coupling of a KERS Powertrain and a 4 Litre Gasoline Engine for Improved Fuel Economy in a Full Size Car," SAE Technical Paper 2010-01-2218, 2010, https://doi.org/10.4271/2010-01-2218.
Author(s):
Affiliated:
Pages:
11
Abstract:
Improvements of vehicle fuel economy are being considered using a mechanically driven flywheel to reduce the amount of mechanical energy produced by the thermal engine recovering the vehicle kinetic energy during braking. A mechanical system having an overall efficiency over a full regenerative cycle of about 70%, about twice the efficiency of battery-based hybrids, is coupled to a naturally aspirated gasoline engine powering a full size sedan. Results of chassis dynamometer experiments and engine and vehicle simulations are used to evaluate the fuel benefits introducing a kinetic energy recovery system and downsizing of the engine. Preliminary results running the new European driving cycle (NEDC) show KERS may reduce fuel consumption by 25% without downsizing, and 33% with downsizing of the 4 litre engine to 3.3 litres.
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