Evaluation of Faster LTFT and SFPP for Protection of Low Temperature Operability in North American Heavy Duty Diesel Trucks

1993 ◽  
Author(s):  
Gerald I. Brown ◽  
John E. Chandler
Keyword(s):  
Low Temperature ◽  
North American ◽  
Heavy Duty ◽  
Heavy Duty Diesel ◽  
Diesel Trucks

In-Use Performance and Durability of Particle Filters on Heavy-Duty Diesel Trucks

2018 ◽  
Author(s):  
Chelsea V. Preble ◽  
Troy E. Cados ◽  
Robert A. Harley ◽  
Thomas W. Kirchstetter
Keyword(s):  
Particle Filters ◽  
Heavy Duty ◽  
Heavy Duty Diesel ◽  
Diesel Trucks

On-road emission measurements of reactive nitrogen compounds from heavy-duty diesel trucks in China

2020 ◽  
Vol 262 ◽  
pp. 114280 ◽  
Author(s):  
Liqiang He ◽  
Shaojun Zhang ◽  
Jingnan Hu ◽  
Zhenhua Li ◽  
Xuan Zheng ◽  
...  
Keyword(s):  
Reactive Nitrogen ◽  
Nitrogen Compounds ◽  
Heavy Duty ◽  
Heavy Duty Diesel ◽  
Diesel Trucks ◽  
Road Emission

Emissions Characteristics for Heavy-Duty Diesel Trucks Under Different Loads Based on Vehicle-Specific Power

2017 ◽  
Vol 2627 (1) ◽  
pp. 77-85 ◽  
Author(s):  
Shuanghong Zhang ◽  
Lei Yu ◽  
Guohua Song
Keyword(s):  
Carbon Dioxide ◽  
Travel Speed ◽  
Specific Power ◽  
Oxides Of Nitrogen ◽  
Heavy Duty ◽  
Operating Modes ◽  
Vehicle Loads ◽  
Heavy Duty Diesel ◽  
Diesel Trucks ◽  
The Impact

Both operating modes and emissions factors for heavy-duty diesel (HDD) trucks were analyzed under different loads to understand the effect of vehicle loads on emissions. Second-by-second speed data for different loads for HDD trucks were collected first. Then a method for calculating the vehicle-specific power (VSP) values and an emissions model for heavy-duty vehicles by using the VSP value were developed to evaluate the effect of different vehicle loads. The VSP distributions and emissions characteristics for fully loaded and unloaded trucks were analyzed and compared. The results illustrate that the fully loaded vehicles spent more time driving in steady modes and the time percentage of VSP values in the bin of 0 kW/ton for fully loaded trucks was lower than the percentage for unloaded trucks. However, the time percentage at the positive VSP value was significantly higher than the percentage for the unloaded trucks. The emissions factors of fully loaded trucks were significantly higher than those of unloaded trucks. Emissions factors were affected the most at speed intervals of 20 to 40 km/h, with emissions factors for carbon dioxide, carbon monoxide (CO), oxides of nitrogen (NOx), hydrocarbon, and particulate matter (PM) at 20.4%, 23.5%, 29.0%, 11.7%, and 9.4% higher, respectively, than those levels for unloaded vehicles. With an increase of travel speed, the impact of the load on emissions weakened. Vehicle loads had the greatest effect on emissions of NOx, followed by emissions of CO. PM emissions were the least affected by vehicle loads. The impact of vehicle loads on emissions was affected by different acceleration behaviors under different loads.

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