vehicle emissions testing Articles

  • Vehicle Testing on Chassis Dynamometers

    The 48" center mounted chassis dynamometers are the most common type and are typically used for emission testing and mileage accumulation. They are equipped with rollers and a motor, which is positioned between the rollers. Inline versions with the motor located inline with the rollers are mainly used for NVH testing. The basic chassis dynamometer facility includes roller set, power and control ...


    By HORIBA Europe GmbH

  • On the right track

    High-speed train manufacturer, CAF, rely on world-class beamforming technology to reduce the noise generated by their trains – helping to make high-speed trains a more viable option for travellers and operators alike. Because of its relatively low levels of CO2 emissions, train travel is considered one of the ...

  • Characterising emissions from private passenger vehicles using engine operating patterns

    A method to simulate emissions factors using frequency distribution plots of engine speed and engine load is proposed. The distribution plots and corresponding emissions factors were developed from speed time series’ of real-world driving cycles and physical properties of a range of private passenger vehicles tested at the EMPA. Emissions factors were estimated for a set of simultaneously ...


    By Inderscience Publishers

  • Characterising emissions from private passenger vehicles using engine operating patterns

    A method to simulate emissions factors using frequency distribution plots of engine speed and engine load is proposed. The distribution plots and corresponding emissions factors were developed from speed time series' of real-world driving cycles and physical properties of a range of private passenger vehicles tested at the EMPA. Emissions factors were estimated for a set of simultaneously ...


    By Inderscience Publishers

  • Analysis of the impacts of an environmental traffic management system on vehicle emissions and air quality

    Environmental traffic management systems (ETMS) are implemented to improve air quality in urban streets. They allow for a situation-related control of light signal systems to optimise road capacities and enhance traffic flow in street sections. Therefore, they are equipped with mitigation strategies and continuously provided with traffic and air quality data. In this context, it is ...


    By IVU Umwelt GmbH

  • Emission behaviour of modern heavy duty vehicles in real world driving

    Within a national and two international research projects, a vehicle emission model was developed, which calculates emissions in real world driving from the engine emission maps by simulating engine power and engine speed. Influences of transient load changes on the emission level are taken into consideration by special functions. Model parameters are gained from a common measurement protocol on ...


    By Inderscience Publishers

  • Explaining vehicle emissions – why do laboratory and road measurements differ?

    The road transport sector is a major contributor to Europe’s emissions of greenhouse gases and air pollution. For certain pollutants, vehicles can emit substantially higher emissions on the road than official emissions tested in laboratories. A report released today by the European Environment Agency (EEA) provides a non-technical guide that describes the reasons for these often significant ...


    By European Commission

  • Emissions Test Report - Gas Compressor Engines

    INTRODUCTION In 2004, Northeast Texas Air Care (NETAC) commissioned a pilot project to demonstrate the effectiveness of available ...


    By DCL International Inc.

  • Criteria and Air-Toxic Emissions from In-Use Automobiles in the National Low-Emission Vehicle Program

    The U.S. Environmental Protection Agency (EPA) implemented a program to identify tailpipe emissions of criteria and air-toxic contaminants from in-use, lightduty low-emission vehicles (LEVs). EPA recruited 25 LEVs in 2002 and measured emissions on a chassis dynamometer using the cold-start urban dynamometer driving schedule of the Federal Test Procedure. The emissions measured included regulated ...

  • On-Vehicle Exhaust Gas Cooling in a Diesel

    ABSTRACT A diesel emissions control system built and tested on an industrial forklift truck is described. The system utilizes a pleated media type diesel soot filter. The temperature limit of the filter material is well below the temperature of the exhaust gas. Therefore, cooling of the exhaust gas is ...


    By DCL International Inc.

  • Are self-driving vehicles good for the environment?

    Autonomous transportation has lots of advantages. Reducing greenhouse gas emissions could be one of them. Can autonomous cars be a boon for the environment? The transportation sector is the second largest source of greenhouse gas emissions in the United States, accounting for 27 ...


    By Ensia

  • Car emissions: taking tests out of the lab and onto the road

    Every year 430,000 Europeans die prematurely due to air pollution. One of the main sources is road vehicles emitting nitrogen oxides (NOx), including poisonous nitrogen dioxide. Following the Volkswagen scandal, in which the company admitted cheating emission test in the US, Parliament and the Council are considering to update existing emission rules to ensure tests are closer to real driving ...


    By European Parliament

  • Size and composition distributions of particulate matter emissions: Part 1 — Light-Duty Gasoline Vehicles (LDGVs)

    Size-resolved particulate matter (PM) emitted from lightduty gasoline vehicles (LDGVs) was characterized usingfilter-based samplers, cascade impactors, and scanning mobility particle size measurements in the summer 2002. Thirty LDGVs, with different engine and emissions control technologies (model years 1965–2003; odometer readings 1264–207,104 mi), were tested on a chassis dynamometer using the ...

  • Engine Testing

    Engine testing involves measurement of rotating speed and torque of the engine by applying load controlled by a dynamometer connected to its output shaft. HORIBA has developed various types of dynamometer for the purpose of engine testing. They are mainly classified into two types; one is absorbing only dynamometer such as hydraulic dynamometers and eddy-current dynamometers, the other is ...


    By HORIBA Europe GmbH

  • Time-resolved ammonia measurement in vehicle exhaust

    The objective of this study was to identify the influence of sampling and analytical approach on the quality of NH3 emission data of a gasoline-fuelled three-way catalyst vehicle. NH3 concentration measurements have been performed in the tailpipe and in the diluted exhaust after a constant volume sampling (CVS) system during five different test cycles. Chemical ionisation mass spectrometry ...


    By Inderscience Publishers

  • Air quality issues drive vehicle alternatives

    Vehicle exhaust systems remain a major source of air pollution in cities, despite the progress being made to reduce emissions from new models. Energy World takes a look at efficiency improvements, and the alternative fuel alternatives to petrol and diesel. In early April, the south of Britain woke to a hazy blanket of smog. A few weeks earlier, Paris had choked and spluttered through its own ...


    By Energy Institute (EI)

  • Introduction of Automotive Testing Department

    Strongly linked with the automotive industry, the history of automotive testing business by HORIBA Group has developed itself along with innovative automotive technologies. Since the first emission measurement system developed in 1964 following the launch of automobile emission control, HORIBA Group has continued strengthening emission control and advancing the emission reduction technologies as ...


    By HORIBA Europe GmbH

  • Solutions for Automotive Testing

    In recent years, the field of research, development and testing of vehicles has created a need for integrated testing systems which cover the entire vehicle including engine and driveline. These systems also need to be capable of being deployed globally in a supportive structure. As a means of responding to these market requirements, building on our strengths in vehicle emissions measurement ...


    By HORIBA Europe GmbH

  • New Fuel Efficiency Standards for Heavy-Duty Vehicles Are a “Win-Win-Win”

    America’s vehicles are on the road to becoming cleaner. Last week, President Obama directed his administration to set new fuel efficiency and greenhouse gas (GHG) emissions standards for medium- and ...

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you