This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Vehicle Inertia Impact on Fuel Consumption of Conventional and Hybrid Electric Vehicles Using Acceleration and Coast Driving Strategy
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 20, 2009 by SAE International in United States
Annotation ability available
In the past few years, the price of petroleum based fuels, especially vehicle fuels such as gasoline and diesel, have been increasing at a significant rate. Consequently, there is much more consumer interest related to reducing fuel consumption of conventional and hybrid electric vehicles (HEVs).
The “pulse and glide” (PnG) driving strategy is first applied to a conventional vehicle to quantify the fuel consumption benefits when compared to steady state speed (cruising) conditions over the same time and distance. Then an HEV is modeled and tested to investigate if a hybrid system can further reduce fuel consumption with the proposed strategy. Note that the HEV used in this study has the advantage that the engine can be automatically shut off below a certain speed (∼40 mph, 64 kph) at low loads, however a driver must shut off the engine manually in a conventional vehicle to apply this driving strategy.
A general analysis of a pulse and glide (PnG) driving strategy is presented and the fuel energy benefit ratio is proposed. Simulation results of a Ford Focus show 33 - 77 % fuel economy improvement by the PnG driving strategy depending on different speed ranges and acceleration times. The fuel economy results of a 2004 Toyota Prius from simulation and testing show 24 - 90 % fuel economy improvement with PnG drive cycles compared to steady speed results. However, the fuel economy can vary in HEVs by electric only drive mode fraction during one short cycle, especially for steady speed cases. The change in battery SOC should be small to compare fuel use results correctly for HEVs.
CitationLee, J., Nelson, D., and Lohse-Busch, H., "Vehicle Inertia Impact on Fuel Consumption of Conventional and Hybrid Electric Vehicles Using Acceleration and Coast Driving Strategy," SAE Technical Paper 2009-01-1322, 2009, https://doi.org/10.4271/2009-01-1322.
- SAE Supermileage, http://students.sae.org/competitions/supermileage/
- Shell Eco marathon, http://www.shell.com/eco-marathon/
- Reynolds K In Search of High Mileage-America's mpg champions meet their match Road and Track , http://metrompg.com/posts/xfi-pulse-and-glide.htm
- Kroushl Dan Pulse and glide unplugged, Toyota Hybrid Synergy View Letter, Fall http://www.toyota.com/html/hybridsynergyview/2005/fall/marathon.html
- Jawad Badih Ali et al. Best Practices for an SAE SUPERMILEAGE Vehicle presented at Future Transportation Technology Conference & Exposition, SAE paper 2001-01-2469 2001
- Powertrain System Analysis Toolkit © (PSAT), http://www.transportation.anl.gov/modeling_simulation/PSAT/
- Rousseau Aymeric et al. Integrating Data, Performing Quality Assurance, and Validating the Vehicle Model for the 2004 Prius Using PSAT presented at SAE World Congress and Exhibition, SAE paper 2006-01-0667 2006
- Gillespie Thomas D. Fundamentals of Vehicle Dynamics SAE International Warrendale, PA March 1992
- Sovran Gino Blaser Dwight A. A Contribution to Understanding Automotive Fuel Economy and Its Limits presented at Government/Industry meeting, SAE paper 2003-01-2070 2003
- Nam E. Giannelli R. Fuel Consumption Modeling of Conventional and Advanced Technology Vehicles in the Physical Emission Rate Estimator (PERE) EPA420-P-05-001 Feburary 2005
- Nam Edward K. Sorab Jagadish Friction Reduction Trends in Modern Engines presented at SAE World Congress, SAE paper 2004-01-1456 2004