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The Effects of GDi Fuel Pressure on Fuel Economy
Technical Paper
2014-01-1438
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
To meet future particulate number regulations, one path being investigated is higher fuel pressures for direct injection systems. At operating pressures of 30 MPa to 40 MPa, the fuel system components must be designed to withstand these pressures and additional power is required by the pump to pressurize the fuel to higher pressures than the nominal 15MPa to 20MPa in use today. This additional power to the pump can affect vehicle fuel economy, but may be partially offset by increases in combustion efficiency due to improved spray mixture preparation. This paper examines the impact on fuel economy from increased system fuel pressures from a combination of test results and simulations. A GDi pump and valvetrain model has been developed and correlated to existing pump torque measurements and subsequently used to predict the increase in torque and associated impact on fuel economy due to higher GDi system pressures.
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Authors
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Citation
Husted, H., Spegar, T., and Spakowski, J., "The Effects of GDi Fuel Pressure on Fuel Economy," SAE Technical Paper 2014-01-1438, 2014, https://doi.org/10.4271/2014-01-1438.Also In
References
- Spegar , T. , Chang , S. , Das , S. , Norkin , E. et al. An Analytical and Experimental Study of a High Pressure Single Piston Pump for Gasoline Direct Injection (GDi) Engine Applications SAE Technical Paper 2009-01-1504 2009 10.4271/2009-01-1504
- Hoffmann , G. , Befrui , B. , Berndorfer , A. , Piock , W.F. et al. Fuel System Pressure Increase for Enhanced Performance of GDi Multi-Hole Injection Systems SAE Technical Paper 2014-01-1209 2014 10.4271/2014-01-1209