Regulated Emissions, Air Toxics, and Particle Emissions from SI-DI Light-Duty Vehicles Operating on Different Iso-Butanol and Ethanol Blends

2014 ◽  
Vol 7 (1) ◽  
pp. 183-199 ◽  
Author(s):  
George Karavalakis ◽  
Daniel Short ◽  
Diep Vu ◽  
Mark Villela ◽  
Robert Russell ◽  
...  
Keyword(s):  
Air Toxics ◽  
Particle Emissions ◽  
Light Duty ◽  
Ethanol Blends ◽  
Light Duty Vehicles

scholarly journals Exhaust emissions of particulate matter from light-duty vehicles – an overview and the current situation

2017 ◽  
Vol 171 (4) ◽  
pp. 227-238
Author(s):  
Piotr BIELACZYC ◽  
Andrzej SZCZOTKA ◽  
Joseph WOODBURN
Keyword(s):  
Particulate Matter ◽  
Laboratory Test ◽  
Direct Injection ◽  
Current Situation ◽  
Engine Fuel ◽  
Fuel Type ◽  
Particle Emissions ◽  
Test Conditions ◽  
Light Duty ◽  
Light Duty Vehicles

Emissions of particulate matter associated with the use of light-duty vehicles are an increasingly important topic, with more and more political attention focused on this issue. Now that direct injection Diesel engines feature DPFs, particle emissions from other engine types operating on other fuels are also of great interest. This paper discusses the phenomenon in general, briefly reviews worldwide legislation and emissions limits and presents the results of a laboratory test programme measuring the particle emissions from a range of vehicles. The experimental programme showed that the engine/fuel type has a greater impact on particle emissions than the test conditions.

Comparison of oil and fuel particle chemical signatures with particle emissions from heavy and light duty vehicles

2006 ◽  
Vol 40 (27) ◽  
pp. 5224-5235 ◽  
Author(s):  
Matthew T. Spencer ◽  
Laura G. Shields ◽  
David A. Sodeman ◽  
Stephen M. Toner ◽  
Kimberly A. Prather
Keyword(s):  
Fuel Particle ◽  
Particle Emissions ◽  
Light Duty ◽  
Chemical Signatures ◽  
Light Duty Vehicles

Ethanol Blends and Engine Operating Strategy Effects on Light-Duty Spark-Ignition Engine Particle Emissions

2011 ◽  
Vol 25 (11) ◽  
pp. 4977-4985 ◽  
Author(s):  
James P. Szybist ◽  
Adam D. Youngquist ◽  
Teresa L. Barone ◽  
John M. Storey ◽  
Wayne R. Moore ◽  
...  
Keyword(s):  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Particle Emissions ◽  
Operating Strategy ◽  
Light Duty ◽  
Ethanol Blends

Particle Emissions from Light-Duty Vehicles during Cold-Cold Start

2016 ◽  
Vol 9 (3) ◽  
pp. 1775-1785 ◽  
Author(s):  
Huzeifa Badshah ◽  
David Kittelson ◽  
William Northrop
Keyword(s):  
Cold Start ◽  
Particle Emissions ◽  
Light Duty ◽  
Light Duty Vehicles

scholarly journals Monte Carlo Simulation Methodology to Assess the Impact of Ambient Wind on Emissions from a Light-Commercial Vehicle Running on the Worldwide-Harmonized Light-Duty Vehicles Test Cycle (WLTC)

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 661
Author(s):  
Alexandros T. Zachiotis ◽  
Evangelos G. Giakoumis
Keyword(s):  
Monte Carlo Simulation ◽  
Energy Consumption ◽  
Commercial Vehicle ◽  
Ambient Wind ◽  
Simulation Methodology ◽  
Road Load ◽  
Light Duty ◽  
Light Commercial Vehicle ◽  
Light Duty Vehicles ◽  
The Impact

A Monte Carlo simulation methodology is suggested in order to assess the impact of ambient wind on a vehicle’s performance and emissions. A large number of random wind profiles is generated by implementing the Weibull and uniform statistical distributions for wind speed and direction, respectively. Wind speed data are drawn from eight cities across Europe. The vehicle considered is a diesel-powered, turbocharged, light-commercial vehicle and the baseline trip is the worldwide harmonized light-duty vehicles WLTC cycle. A detailed engine-mapping approach is used as the basis for the results, complemented with experimentally derived correction coefficients to account for engine transients. The properties of interest are (engine-out) NO and soot emissions, as well as fuel and energy consumption and CO2 emissions. Results from this study show that there is an aggregate increase in all properties, vis-à-vis the reference case (i.e., zero wind), if ambient wind is to be accounted for in road load calculation. Mean wind speeds for the different sites examined range from 14.6 km/h to 24.2 km/h. The average increase in the properties studied, across all sites, ranges from 0.22% up to 2.52% depending on the trip and the property (CO2, soot, NO, energy consumption) examined. Based on individual trip assessment, it was found that especially at high vehicle speeds where wind drag becomes the major road load force, CO2 emissions may increase by 28%, NO emissions by 22%, and soot emissions by 13% in the presence of strong headwinds. Moreover, it is demonstrated that the adverse effect of headwinds far exceeds the positive effect of tailwinds, thus explaining the overall increase in fuel/energy consumption as well as emissions, while also highlighting the shortcomings of the current certification procedure, which neglects ambient wind effects.

Chemical characterization of PM2.5 emitted from China IV and China V light-duty vehicles in China

2021 ◽  
Vol 783 ◽  
pp. 147101
Author(s):  
Yanzhao Hao ◽  
Shunxi Deng ◽  
Zhaowen Qiu ◽  
Zhenzhen Lu ◽  
Hui Song ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Light Duty ◽  
Light Duty Vehicles

Revised Method for Calculating Departure Sight Distance at Two-Way Stop-Controlled (TWSC) Intersections

2021 ◽  
pp. 036119812110315
Author(s):  
Essam Dabbour ◽  
Said M. Easa
Keyword(s):  
Traffic Safety ◽  
Major Road ◽  
Light Duty ◽  
Sight Distance ◽  
Data Loggers ◽  
Global Positioning ◽  
Actual Field ◽  
System Data ◽  
Negative Impacts ◽  
Light Duty Vehicles

This paper introduces realistic acceleration profiles for light-duty vehicles departing from rest at two-way stop-controlled (TWSC) intersections where minor roads (controlled by stop signs) intersect with uncontrolled major roads. The new profiles are based on current vehicle characteristics and driver behavior patterns. They are established based on actual field data collected using global positioning system data loggers that recorded the positional and speed data of various experimental vehicles starting from rest at TWSC intersections. Acceleration profiles are established in this paper and are used to develop a revised method for calculating the departure sight distance at TWSC intersections. Design tables were created to provide realistic sight distance values at TWSC intersections for different design speeds and number of lanes on the major road. It was found that the current values of intersection sight distance suggested by the design guides may be inadequate. Such values may force some approaching drivers on the major road to reduce their speeds or move to different traffic lanes to avoid conflicting with the departing vehicles. These maneuvers may have negative impacts on traffic safety. Therefore, implementing the revised method for calculating intersection sight distance, as presented in this paper, may ultimately reduce traffic collisions at TWSC intersections.

Sign in / Sign up

Export Citation Format

Share Document