The Study of NOx Reduction using Urea-SCR System with CPF and DOC for Light Duty Vehicle; the Diesel NOx Reduction System

2008 ◽  
Author(s):  
Kihyung Joo ◽  
Ji-Ho Jo ◽  
ChangDae Kim ◽  
Jin-ha Lee ◽  
Hong-jip Kim
Keyword(s):  
Nox Reduction ◽  
Light Duty ◽  
Reduction System ◽  
Light Duty Vehicle ◽  
Scr System

scholarly journals SCR systems for NOx reduction in heavy and light duty vehicles

2016 ◽  
Vol 164 (1) ◽  
pp. 32-36
Author(s):  
Piotr JAWORSKI ◽  
Sebastian JAROSIŃSKI ◽  
Azael CORTES CAPETILLO ◽  
Łukasz KAPUSTA ◽  
Adam ZIÓŁKOWSKI ◽  
...  
Keyword(s):  
Air Pollution ◽  
Automotive Industry ◽  
Urban Areas ◽  
Nox Reduction ◽  
Road Transport ◽  
Light Duty ◽  
Scr System ◽  
Light Duty Vehicles ◽  
Transport Emissions ◽  
System Designs

Air pollution has become an important worldwide problem. The European Commission credits road and water transport as the major source of NOx pollution, and of being responsible for around 50% of the total air pollution in urban areas. During the last decade, the use of SCR technologies have gained popularity as a method for NOx reduction, the technology is widely considered as one of the solutions for road transport emissions. This paper presents a review of the different SCR system designs derived from the various factors and regulations in the automotive industry which have influenced the technology, along with a parametric study of a proprietary SCR system for heavy duty application.

scholarly journals Numerical Optimization of a SCR System Based on the Injection of Pure Gaseous Ammonia for the NOx Reduction in Light-Duty Diesel Engines

2020 ◽  
Author(s):  
Augusto Della Torre ◽  
Gianluca Montenegro ◽  
Angelo Onorati ◽  
Tarcisio Cerri ◽  
Enrico Tronconi ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Numerical Optimization ◽  
Nox Reduction ◽  
Gaseous Ammonia ◽  
Light Duty ◽  
Scr System

A compact solid SCR system for NOx reduction in passenger cars and light duty trucks

MTZ worldwide ◽  
2003 ◽  
Vol 64 (6) ◽  
pp. 14-17 ◽  
Author(s):  
Michael Krüger ◽  
Patrick Nisius ◽  
Volker Scholz ◽  
Andreas Wiartalla
Keyword(s):  
Nox Reduction ◽  
Passenger Cars ◽  
Light Duty ◽  
Scr System

Characteristics of NOx Emission of Light-duty Diesel Vehicle with LNT and SCR system by Season and RDE Phase

2021 ◽  
pp. 146750
Author(s):  
Yongjoo Lee ◽  
Seungil Lee ◽  
Seunghyun Lee ◽  
Hoimyung Choi ◽  
Kyoungdoug Min
Keyword(s):  
Nox Emission ◽  
Light Duty ◽  
Scr System ◽  
Diesel Vehicle

Optimal investment strategies for light duty vehicle and electricity generation sectors in a carbon constrained world

2016 ◽  
Vol 255 (1-2) ◽  
pp. 391-420 ◽  
Author(s):  
Boxiao Chen ◽  
Erica Klampfl ◽  
Margaret Strumolo ◽  
Yan Fu ◽  
Xiuli Chao ◽  
...  
Keyword(s):  
Electricity Generation ◽  
Optimal Investment ◽  
Investment Strategies ◽  
Light Duty ◽  
Light Duty Vehicle

Low-Level Automated Light-Duty Vehicle Technologies Provide Opportunities to Reduce Fuel Consumption

2018 ◽  
Vol 2672 (24) ◽  
pp. 60-74 ◽  
Author(s):  
Saeed Vasebi ◽  
Yeganeh M. Hayeri ◽  
Constantine Samaras ◽  
Chris Hendrickson
Keyword(s):  
Fuel Consumption ◽  
Aerodynamic Force ◽  
The United States ◽  
Route Guidance ◽  
Conventional Vehicle ◽  
Automated Vehicle ◽  
Fuel Savings ◽  
Light Duty ◽  
Vehicle Systems ◽  
Light Duty Vehicle

Gasoline is the main source of energy used for surface transportation in the United States. Reducing fuel consumption in light-duty vehicles can significantly reduce the transportation sector’s impact on the environment. Implementation of emerging automated technologies in vehicles could result in fuel savings. This study examines the effect of automated vehicle systems on fuel consumption using stochastic modeling. Automated vehicle systems examined in this study include warning systems such as blind spot warning, control systems such as lane keeping assistance, and information systems such as dynamic route guidance. We have estimated fuel savings associated with reduction of accident and non-accident-related congestion, aerodynamic force reduction, operation load, and traffic rebound. Results of this study show that automated technologies could reduce light-duty vehicle fuel consumption in the U.S. by 6% to 23%. This reduction could save $60 to $266 annually for the owners of vehicles equipped with automated technologies. Also, adoption of automated vehicles could benefit all road users (i.e., conventional vehicle drivers) up to $35 per vehicle annually (up to $6.2 billion per year).

scholarly journals Impact of freeway weaving segment design on light-duty vehicle exhaust emissions

2018 ◽  
Vol 68 (6) ◽  
pp. 564-575 ◽  
Author(s):  
Qing Li ◽  
Fengxiang Qiao ◽  
Lei Yu ◽  
Shuyan Chen ◽  
Tiezhu Li
Keyword(s):  
Exhaust Emissions ◽  
Vehicle Exhaust ◽  
Light Duty ◽  
Light Duty Vehicle

Environmental and Safety Performance of Commercially-available Light-duty Vehicle Tires in North America

2018 ◽  
Author(s):  
Hamza Shafique ◽  
Brad Richard ◽  
Martha Christenson ◽  
Sandra Bayne
Keyword(s):  
North America ◽  
Safety Performance ◽  
Light Duty ◽  
Light Duty Vehicle

Diesel Emission Test Stand for Advanced SCR Control

2015 ◽  
Author(s):  
Joe Noto ◽  
Athul Radhakrishnan ◽  
Ye Sun ◽  
Josh Ferreira ◽  
Marc Compere
Keyword(s):  
Control Systems ◽  
Fuel Economy ◽  
Nox Reduction ◽  
Test Stand ◽  
Diesel Emissions ◽  
Diesel Generator ◽  
Light Duty ◽  
Nox Sensor ◽  
Diesel Emission ◽  
Tier 3

The combination of increasingly challenging emissions regulations and impending Corporate Average Fuel Economy (CAFE) standards of 54.5 mpg by 2025 presents auto makers with a challenge over the next 10 years. The most promising technologies currently available for meeting high fuel economy and low emissions regulations are increased hybridization, turbo downsizing, and increased Diesel engine implementation. Combining these into a hybrid turbo Diesel is an ideal transition technology for the very near future as battery and other alternative fuels become viable for widespread automotive use. This paper presents a Diesel emission test stand to improve Selective Catalytic Reduction (SCR) systems for light duty Diesel vehicles, particularly hybrid power systems that experience many start-stop events. Advanced modeling and control systems for SCR systems will further reduce tailpipe emissions below existing Tier structures and will prepare manufacturers to meet increasingly stringent Tier 3 standards beginning in 2017. SCR reduces oxides of Nitrogen, NO, and NO2, from otherwise untreated Diesel emissions. Scientific study has proved that inhaling this harmful exhaust gas is directly responsible for some forms of lung cancer and a variety of other respiratory diseases. In addition to EPA Tier emissions levels and CAFÉ standards, the On-Board Diagnostics (OBD) regulations require every vehicle’s emission control systems to actively report their status during all engine-on vehicle operation. Testing and development with production NOx sensors and production SCR components is critical to improving NOx reduction and for OEMs to meeting strict Tier 3 light duty emission standards. The test stand was designed for straightforward access to the NOx sensors, injector, pump and all exhaust components. A Diesel Particulate Filter (DPF) followed by a Diesel Oxidizing Catalyst (DOC) precedes the Selective Catalytic Reducer (SCR) injector, mixing pipe and catalyst. An upstream NOx sensor reads engine-out NOx and the downstream NOx sensor reports the post catalyst NOx levels. Custom fabrication work was required to integrate the SCR mechanical components into a simple system with exhaust components easily accessible in a repeatable, controlled laboratory environment. A Diesel generator was used in combination with a custom designed resistive load bank to provide variable NOx emissions according to the EPA drive cycles. A production exhaust temperature sensor was calibrated and integrated into the software test manager. Production automotive NOx sensors and SCR injector, pump and heaters were mounted on a production light duty vehicle exhaust system. The normalized nature of NOx concentration in parts per million (ppm) allows the small Diesel generator to adequately represent larger Diesels for controls development purposes. Both signal level and power electronics were designed and tested to operate the SCR pump, injector, and three Diesel Exhaust Fluid (DEF) heating elements. An Arduino-based Controller Area Network (CAN) communications network read the NOx Diesel emissions messages from the upstream and downstream sensors. The pump, injector, solenoid, and line heaters all functioned properly during DEF fluid injection. CAN and standard serial communications were used for Arduino and Matlab/Simulink based control and data logging software. Initial testing demonstrated partial and full NOx reduction. Overspray saturated the catalyst and demonstrated the production NOx sensor’s cross-sensitivity to ammonia. The ammonia was indistinguishable from NOx during saturation and motivates incorporation of a separate ammonia sensor.

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