Effect of Physical Characteristics of Lubricating Oils on Emissions, Fuel Economy and Oil Consumption in a Light Duty Diesel Engine

1995 ◽  
Author(s):  
M. Manni ◽  
C. Gommellini ◽  
G. Sabbioni
Keyword(s):  
Diesel Engine ◽  
Fuel Economy ◽  
Physical Characteristics ◽  
Oil Consumption ◽  
Lubricating Oils ◽  
Light Duty

Multi-Dimensional Engine Modeling Study of EGR, Fuel Pressure, Post-Injection and Compression Ratio for a Light Duty Diesel Engine

2014 ◽  
Author(s):  
Fabio L. Almeida ◽  
Philip Zoldak ◽  
Yan Wang ◽  
Andrzej Sobiesiak ◽  
Pedro T. Lacava
Keyword(s):  
Diesel Engine ◽  
Fuel Economy ◽  
Computational Study ◽  
Air Entrainment ◽  
Droplet Breakup ◽  
Particulate Filter ◽  
Post Injection ◽  
Lifted Flame ◽  
Light Duty ◽  
Soot Emissions

For copious levels of exhaust gas recirculation (EGR) (>30 %), oxides of nitrogen (NOx) emissions can be reduced from Euro V to Euro VI regulated levels at the expense of fuel economy and soot emissions. The Lifted-Flame Concept (LFC) has been demonstrated by several researchers to be successful in reducing NOx, while minimizing soot emissions and impact to fuel economy. By simultaneously applying increased EGR and fuel pressure the LFC extends the lift-off length of a diffusion flame and enhances fuel-air entrainment leading to improved fuel and oxygen utilization. When combined with advanced turbocharging and EGR systems the LFC applied to a modern light duty (LD) diesel engine can result in improved fuel economy and lower soot emissions and shows good potential for meeting low soot engine-out targets. In the proposed paper a computational study was conducted using a multi-dimensional engine model. A modified 3D CFD KIVA code with detailed chemistry solver was used to model the diesel fuel spray, droplet breakup, vaporization, mixing, auto-ignition and subsequent heat release and emissions. The model uses inputs from 1D Amesim electro-hydraulic solver to generate the rate of injection (ROI) profile to raise pressure of 1800 bar to 2500 bar as well as to include a simulated post-injection. A 1D model using GT-Power was developed and utilized to provide air system boundary conditions for the 3D CFD model. Post-processing optimization was conducted using Matlab to identify minimum fuel economy and soot emissions for the study of several parameters. The objective of the study was to demonstrate Euro VI emissions levels on a 3.2 L LD diesel engine without NOx aftertreatment and minimal impact to fuel economy using the lifted flame concept. The engine-out NOx emission level was targeted at 0.4 g/kWh and the soot levels were targeted at 0.2 g/kWh assuming diesel particulate filter would be used for after-treatment. The results of the computational study successfully demonstrate the potential of the lifted flame concept to meet Euro VI without the use of NOx aftertreatment technology.

Influence of Low Viscosity Lubricating Oils on Fuel Economy and Durability of Passenger Car Diesel Engine

2012 ◽  
Vol 5 (3) ◽  
pp. 1426-1435 ◽  
Author(s):  
Ashok Permude ◽  
Mehul Pathak ◽  
Venkatesh Kumar ◽  
Sachleen Singh
Keyword(s):  
Diesel Engine ◽  
Fuel Economy ◽  
Passenger Car ◽  
Lubricating Oils ◽  
Low Viscosity

scholarly journals Drive cycle simulation of high efficiency combustions on fuel economy and exhaust properties in light-duty vehicles

2015 ◽  
Vol 157 ◽  
pp. 762-776 ◽  
Author(s):  
Zhiming Gao ◽  
Scott J. Curran ◽  
James E. Parks ◽  
David E. Smith ◽  
Robert M. Wagner ◽  
...  
Keyword(s):  
Fuel Economy ◽  
High Efficiency ◽  
Drive Cycle ◽  
Cycle Simulation ◽  
Light Duty ◽  
Light Duty Vehicles
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