Measurement of Brake-specific NOX Emissions using Zirconia Sensors for In-use, On-board Heavy-duty Vehicle Applications

2002 ◽  
Author(s):  
Mridul Gautam ◽  
Wesley C. Riddle ◽  
Gregory J. Thompson ◽  
Daniel K. Carder ◽  
Nigel Clark ◽  
...  
Keyword(s):  
Nox Emissions ◽  
Heavy Duty ◽  
Heavy Duty Vehicle

Method for Translation of In-Use Fuel Consumption and NOX Emissions Between Different Heavy-Duty Vehicle Routes

2011 ◽  
Author(s):  
Oscar F. Delgado ◽  
Nigel N. Clark ◽  
Gregory J. Thompson
Keyword(s):  
Fuel Consumption ◽  
Relative Error ◽  
Nox Emissions ◽  
Vehicle Speed ◽  
Chassis Dynamometer ◽  
Heavy Duty ◽  
Simple Method ◽  
The Road ◽  
Heavy Duty Vehicle ◽  
Vehicle Activity

Portable emissions measurement systems (PEMS) are used to perform in-use measurements for emissions inventory and regulatory applications. PEMS data represent real world conditions more accurately than chassis dynamometer or engine dynamometer testing, arguably being the most realistic method of determining exhaust emissions over a certain driving route. However, measured emissions and fuel consumption depend strongly on both the route followed and the traffic situation that the vehicle encounters. A tool for translation of emissions and fuel consumption between diverse types of vehicle activity is required. The purpose of this paper is to assess the possibility of using route-averaged properties (kinematic parameters) for translation of fuel consumption and NOx emissions for a set of eighteen heavy-duty vehicles operating over up to eight different driving routes. A linear model developed for heavy-duty vehicle chassis dynamometer data modeling has been extended to in-use heavy-duty vehicle data. Two approaches were implemented; the first approach mimicked the prior chassis dynamometer work by incorporating average vehicle speed and average positive acceleration and the second approach incorporated road grade in a characteristic power parameter. The end result is a simple method which was shown to be accurate for estimation of fuel consumption (within 5% relative error) and NOx emissions (within 12% relative error) for over-the-road vehicles over “unseen” roads or traffic situations, without the need to perform additional over-the-road tests.

scholarly journals Analysis of an automotive thermoelectric generator coupled to an electric exhaust heater to reduce NOx emissions in a Diesel-powered Euro VI Heavy Duty vehicle

2021 ◽  
Vol 19 ◽  
pp. 407-412
Author(s):  
A. Massaguer ◽  
◽  
E. Massaguer ◽  
J. Ximinis ◽  
T. Pujol ◽  
...  
Keyword(s):  
Thermoelectric Generator ◽  
Electrical Energy ◽  
Urea Solution ◽  
Nox Emissions ◽  
Exhaust Gas ◽  
Heavy Duty ◽  
New Approach ◽  
Heavy Duty Vehicle ◽  
Automotive Thermoelectric Generator ◽  
Scr System

This study presents a new approach to minimize the amount of NOx emitted by diesel engines of Heavy-Duty Vehicles during low engine regimes and low gases temperature conditions. We propose the addition of an electric Exhaust Gas Heater (EGH) to make the SCR system inject the urea solution at low engine regimes. The second part of this study focuses on the viability to use an Automotive Thermoelectric Generator (ATEG) to generate the energy required by the EGH and thus avoiding the need to consume electrical energy from the vehicle’s system. This EGHATEG system is designed to be energetically closed, so there is no extra consumption of fuel. Experimental results show that NOx emissions reduce up to 80% when an EGH is added to a standard diesel-powered Euro VI Heavy Duty truck configuration. Simulations show that an ATEG installed downstream of the aftertreatment system can produce the energy required by the EGH. This system can improve SCR efficiency up to 55% during low engine regimes.

scholarly journals Research on real-driving emissions of heavy tractor under different loads

2021 ◽  
Vol 268 ◽  
pp. 01041
Author(s):  
Yantao Dou ◽  
Yong Li ◽  
Jian Ling
Keyword(s):  
Diesel Emissions ◽  
Chinese Government ◽  
Nox Emissions ◽  
Heavy Duty ◽  
Real Driving Emission ◽  
Heavy Duty Vehicle ◽  
The World ◽  
Test Requirements ◽  
Road Emission ◽  
Very High

The actual road diesel emissions of heavy-duty vehicle is very high, which has been a concern around the world. In 2018, Chinese government promulgated the "China VI" regulations containing real-driving emission test requirements and limits, requiring vehicle manufacturers to effectively control vehicle emissions to meet the requirements of China VI. This article takes a heavy-duty tractor equipped with a "China VI" engine as the research object, and performs actual road emission tests after loading 10%, 25%, 50%, 75%, and 100% respectively. The results show that NOx emissions are higher at low loads and PN emissions are higher at high loads, and CO emissions are not sensitive to load changes.

scholarly journals Regional and environmental impacts of expanding the heavy duty vehicle charge to the secondary road network in Austria

Empirica ◽  
2012 ◽  
Vol 39 (2) ◽  
pp. 261-278 ◽  
Author(s):  
Karl W. Steininger ◽  
Christoph Schmid ◽  
Alexandra Tobin
Keyword(s):  
Environmental Impacts ◽  
Road Network ◽  
Heavy Duty ◽  
Heavy Duty Vehicle

scholarly journals An estimation of heavy-duty vehicle fleet CO2 emissions based on sampled data

2021 ◽  
Vol 94 ◽  
pp. 102784
Author(s):  
Nikiforos Zacharof ◽  
Georgios Fontaras ◽  
Biagio Ciuffo ◽  
Alessandro Tansini ◽  
Iker Prado-Rujas
Keyword(s):  
Co2 Emissions ◽  
Sampled Data ◽  
Heavy Duty ◽  
Heavy Duty Vehicle ◽  
Vehicle Fleet

Heavy-Duty Vehicle Platoon Formation for Fuel Efficiency

2016 ◽  
Vol 17 (4) ◽  
pp. 1051-1061 ◽  
Author(s):  
Kuo-Yun Liang ◽  
Jonas Martensson ◽  
Karl H. Johansson
Keyword(s):  
Fuel Efficiency ◽  
Heavy Duty ◽  
Heavy Duty Vehicle ◽  
Vehicle Platoon

scholarly journals Understanding elevated real-world NOx emissions: Heavy-duty diesel engine certification testing versus in-use vehicle testing

Fuel ◽  
2022 ◽  
Vol 307 ◽  
pp. 121771
Author(s):  
Yu Jiang ◽  
Yi Tan ◽  
Jiacheng Yang ◽  
Georgios Karavalakis ◽  
Kent C. Johnson ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Real World ◽  
Nox Emissions ◽  
Heavy Duty ◽  
Certification Testing ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Vehicle Testing
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