Fuel Injection Strategies to Reduce Emissions and Fuel Consumption of a Low Compression Ratio Diesel Engine Indian Institute of Technology Madras

Format:

Book

Conference/Event

Author/Creator:

Vellandi, Vikraman, author.

Contributor:

Krishnasamy, Anand

Ramesh, A.

Conference Name:

SAE Powertrains, Fuels & Lubricants Digital Summit (2021-09-28 : Live Online, Pennsylvania, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

The present work investigates the effects of lowering the compression ratio (LCR) from 18:1 to 14:1 and optimizing the fuel injection parameters across the operating range of a mass production light duty diesel engine. The results were quantified for the Indian regulatory drive cycle using a one-dimensional simulation tool. The results show that the LCR approach can simultaneously reduce the oxides of nitrogen (NOx) and soot emissions by 28% and 64%, respectively. However, the hydrocarbon (HC) and carbon monoxide (CO) emissions increased significantly by 305% and 119%, respectively with a 4.5% penalty in brake specific fuel consumption (BSFC). Hence, optimization of fuel injection parameters specific to LCR variant was attempted. It was evident that advancing the main injection timing and reducing the injection pressure at low-load operating points can significantly help reduce BSFC, HC and CO emissions with a slight increase in the NOx emissions. On the contrary, retarding the main injection timing and increasing the injection pressure at high-load operating points can further reduce the soot emissions without elevating the NOx emissions. The results obtained with the optimized injection timings identified for the Indian regulatory cycle show that the soot emissions of the LCR engine are further reduced from 64% to 82%. Moreover, the HC and CO emission penalty could be reduced significantly to 76% and 54%, respectively whereas the fuel consumption penalty could be brought down to 1.6%. Thus, by adopting the proposed injection strategy the emissions and fuel consumption penalty of an LCR engine can be reduced significantly

Notes:

Vendor supplied data

Publisher Number:

2021-01-1166

Access Restriction:

Restricted for use by site license