Browse Publications Technical Papers 2010-32-0094
2010-09-28

Investigations on Low Pressure Gasoline Direct Injection for a Standard GDI Combustion System 2010-32-0094

In the course of the last few years a continuous increase of the injection pressure level of gasoline direct injection systems appeared. Today's systems use an injection pressure up to 200bar and the trend shows a further increase for the future. Although several benefits go along with the increased injection pressure, the disadvantages such as higher system costs and higher energy demand lead to the question of the lowest acceptable injection pressure level for low cost GDI combustion systems. Lowering injection pressure and costs could enable the technological upgrading from MPFI to GDI in smaller engine segments, which would lead to a reduction of CO2 emission.
This publication covers the investigation of a low pressure GDI system (LPDI) with focus on small and low cost GDI engines. The influence of the injection pressure on the fuel consumption and emission behavior was investigated using a 1.4l series production engine. Baseline tests on the vehicle dynamometer and the engine test bed were followed by experimental and simulation investigations of the system behavior using lowered injection pressure. These investigations were concluded by experimental tests with adapted and optimized engine operating parameters, e.g. valve timing or injection and ignition timing. The general focus was the determination of the lowest acceptable injection pressure and the assessment of benefits and disadvantages of the reduced injection pressure in terms of the main issues, i.e. fuel economy, emission and engine operation stability.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
JOURNAL ARTICLE

Experimental Investigation of the Influence of Boost on Combustion and Particulate Emissions in Optical and Metal SGDI-Engines Operated in Stratified Mode

2016-01-0714

View Details

TECHNICAL PAPER

Experimental Investigation on Performance and Emission Characteristics of DI Diesel Engine with Hydrogen Fuel

2007-26-030

View Details

JOURNAL ARTICLE

Effect of Engine Parameters on Mixture Stratification in a Wall-Guided GDI Engine - A Quantitative CFD Analysis

2017-01-0570

View Details

X