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.

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.

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

Influence of Aromatic Type on Diesel Emissions Investigated by Blending Narrow-Cut Components and Pure Hydrocarbons Into a Base Fuel

2001 ◽  
Author(s):  
W. S. Neill ◽  
W. L. Chippior ◽  
Ö. L. Gülder
Keyword(s):  
Aromatic Compounds ◽  
Chemical Structure ◽  
Test Procedure ◽  
Diesel Emissions ◽  
Nox Emissions ◽  
Heavy Duty ◽  
Aromatic Content ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Steady State Simulation

Abstract The influence of fuel aromatic content and type on the exhaust emissions from a heavy-duty diesel engine were investigated by blending predetermined amounts of aromatic compounds with a known chemical structure into a low-aromatic base fuel. Seven test fuels were blended with constant cetane numbers and densities, but with mono-, di-, and tri-aromatic contents ranging from 10 to 30%, 0 to 10%, and 0 to 8%, respectively. The engine experiments were run using the AVL eight-mode steady-state simulation of the EPA transient test procedure. The results show that fuel total aromatic content or type did not significantly affect the engine’s PM emissions. NOx emissions, however, increased by 4.3% as the fuel mono-aromatic content increased from 10 to 30%.

The Supply-Demand Research of Cultural and Tourism Industries Policies in China with the Impact of COVID-19

2020 ◽  
Vol 11 (1) ◽  
pp. 24-24
Author(s):  
Dr. Jianfei Yang
Keyword(s):  
Tourism Industry ◽  
Chinese Government ◽  
Cultural Industries ◽  
Real Situation ◽  
The Real ◽  
The World ◽  
The Impact ◽  
Near Future ◽  
Post Period

COVID-19 has made a bad influence on economic and society including cultural and tourism industry in China，2020.The industry has received a huge loss in the first quarter of the year and the situation is getting worse in the near future. It is believed that there will be a long impact for the country even the world. In order to recover the industry, Chinese government has published series of policies to support the enterprises and clusters to reduce the bad influence of COVID-19. This paper mainly uses filed survey and documentary research to map the real situation of the industry. It tries to find the policy demand of the industries and then analyze the policies published by government to conquer COVID-19. Meanwhile it will focus on whether the supply meet the demand and give suggestions on how to promote the policy efficiency in the post period of COVID-19 in China. Keywords: Evaluation; Cultural Industries; Policy; Park; Pandemic

How India Fights with COVID-19 with Learning from Highly Affected Countries

2020 ◽  
Vol 15 ◽  
Author(s):  
Pooja Sharma ◽  
Karan Veer
Keyword(s):  
Risk Assessment ◽  
Gene Sequencing ◽  
Lessons Learned ◽  
World Health ◽  
Global Risk ◽  
The World ◽  
Global Risk Assessment ◽  
Health Organization ◽  
Very High ◽  
Breathing Problem

: It was 11 March 2020 when the World Health Organization (WHO) declared the name COVID-19 for coronavirus disease and also described it as a pandemic. Till that day 118,000 cases were confirmed of pneumonia with breathing problem throughout the world. At the start of New Year when COVID-19 came into knowledge a few days later, the gene sequencing of the virus was revealed. Today the number of confirmed cases is scary, i.e. 9,472,473 in the whole world and 484,236 deaths have been recorded by WHO till 26 June 2020. WHO's global risk assessment is very high [1]. The report is enlightening the lessons learned by India from the highly affected countries.

Spillovers to the Global South

2017 ◽  
Author(s):  
Yilmaz Akyüz
Keyword(s):  
World Economy ◽  
Commodity Prices ◽  
Global South ◽  
Capital Inflows ◽  
Global Crisis ◽  
Advanced Economies ◽  
The World ◽  
Run Up ◽  
Global Growth ◽  
Very High

The crisis demolished the myth that EDEs were decoupled from advanced economies and BRICS were becoming new engines of global growth. From 2011 onwards, with the end of the twin booms in commodity prices and capital inflows, growth in EDEs has converged downward towards the depressed levels of advanced economies from the very high levels achieved in the run-up to the global crisis and the immediate aftermath. Loss of momentum is particularly visible in economies that failed to manage the earlier booms prudently. In examining the spillovers from policies in major advanced economies and China to EDEs, the chapter introduces the notion of commodity-finance nexus wherein these markets reinforce each other during both expansions and contractions. The chapter concludes with a brief discussion of policies needed to put the world economy into decent shape and to avoid liquidity and debt crises in EDEs.

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
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