Advanced PFI: The Economical, High-Performance Systems Approach 2015-36-0392
With Advanced PFI, Bosch has demonstrated that gasoline port-fuel injection is becoming significantly more energy-efficient by means of innovative system development. Advanced PFI combines fuel pressure increase, twin injection, PFI scavenging, and open valve injection.
The use of Advanced PFI makes it possible to reduce consumption by 12%, with a corresponding decrease in CO2 emissions. The higher compression in the part-load range alone accounts for 2% of the reduction. The remaining 10% come from downsizing with turbocharging and PFI scavenging.
At the same time, Advanced PFI allows a reduction in hydrocarbons (HC) emissions. Thanks to more homogenous air-fuel mixture formation and reduced manifold wall fuel condensation, HC emissions fall by 20% in the test cycle.
And Advanced PFI also permits an increase in specific engine power output, with PFI scavenging achieving significantly higher low-end torque.
Citation: Posselt, A., Mai, A., Leder, M., Salvio, R. et al., "Advanced PFI: The Economical, High-Performance Systems Approach," SAE Technical Paper 2015-36-0392, 2015, https://doi.org/10.4271/2015-36-0392. Download Citation
Author(s):
Andreas Posselt, Arthur Mai, Martin Leder, Rodrigo Salvio, Tulio Coletto
Affiliated:
Robert Bosch Latin America
Pages: 8
Event:
24th SAE Brasil International Congress and Display
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Carbon dioxide
Scavenging
Emissions
Hydrocarbons
Pressure
Manifolds
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »