Vehicle Exhaust Articles

  • A three–dimensional CFD approach for prediction of noise reduction of mufflers without mean flow

    A CFD approach, in which the full equations are solved in the time domain, is proposed to calculate noise reduction of a cleaner and a complex exhaust muffler without mean flow. First, two modelling approaches are used to deal with the outlet boundary and to calculate noise reduction of the cleaner without a filter element. The calculated results agree quite well with measurements. Further, the ...


    By Inderscience Publishers

  • Removal of vehicle exhaust fumes at fire stations

    The challenge The fire brigade of Kassel (Germany) was looking for three new vehicle exhaust extraction systems. Systems that would remove exhaust fumes very effectively, protecting the fire fighters from hazardous diesel exhaust fumes. Other fire stations within the Kassel region were already provided with extraction systems. The fire brigade of Kassel choose for a fully ...


    By Plymovent Group BV

  • Magnetic Grabber ensures effective exhaust removal

    The challenge The Marshfield Fire & Rescue Department has been using a number of SBT-Pneumatic systems of Plymovent since 2004. The SBT-Pneumatic systems have been removing vehicle exhaust gasses from the emergency vehicles - such as fire trucks and ambulances - inside the service station. The Magnetic Grabber® was installed ...


    By Plymovent Group BV

  • Numerical simulation of turbulent dispersion on a two-way facing traffic road

    A Large Eddy Simulation (LES) model was developed to investigate vehicle-induced turbulence and its effect on turbulent dispersion. The instantaneous behaviour of vehicle exhausts and the time-space averaged distributions of flow and concentration statistics on the roadway were estimated. The patterns of mean flow are significantly different between the one-way and the two-way traffic cases. In ...


    By Inderscience Publishers

  • Battle Creek Air National Guard uses exhaust removal system

    Monoxivent provided XL-Series Hose Reels to capture diesel exhaust fumes from military vehicles at Battle Creek Air National Guard. The reels featured 50’ of exhausting hose in 12” and 14” diameters. The drums were 36” diameter by 7’ wide. The reels were chain driven and explosion proof. A stainless steel tapered cone adapter with spring clamp and dual handles also ...


    By Monoxivent

  • Pennsylvania air national guard uses exhaust removal system

    Monoxivent’s 9000-MTR Hose Reel was used to remove toxic exhaust fumes from military vehicles at the Pennsylvania Air National Guard. Monoxivent's motor-operated hose reels are the premier solution to exhaust extraction. They provide the answer for customers who have obstructions, which prohibit the use of other types of overhead-exhaust systems.  At the Air National Guard facility, ...


    By Monoxivent

  • Cleaner bus traffic by minimizing exhaust gases

    Customer: Kabus Challenge: Bus manufacturer Kabus wanted to reduce the discharge of exhaust gases and the consumption of fuel of their vehicles. Solution: A hybrid bus which combines an electric motor and a combustion engine. Key benefits: 30% reduction in fuel consumption, 30% reduction in exhaust gases. Due to the lighter ...

  • Modelling the dispersion of motor vehicle exhaust gases, including building effects, and its application to the calculation of NOx concentration in Osaka City

    This paper presents a model for dispersion of NOx from motor vehicles and stationary sources in urban areas. Annual average NOx concentrations from these sources were calculated using the Gaussian plume model. The calculated concentrations were compared with the observed concentrations at 67 air monitoring stations located in Osaka Plain. The effect of mechanical turbulence resulting from ...


    By Inderscience Publishers

  • Effects of trees on the dilution of vehicle exhaust emissions in urban street canyons

    In order to investigate the natural ventilation and air quality of urban street canyons with trees, boundary layer wind tunnel studies at a small-scale model have been performed. Concentrations in street canyons with a tracer gas emitting line source at the ground level and one row of trees arranged along the canyon centre have been measured for several equidistant tree spacings. In the case of ...


    By Inderscience Publishers

  • An experimental investigation of the sound level produced by bulldozers with various maintenance schedules

    This study was made to understand and evaluate the effect of maintenance on noise production from bulldozers through experimental measurements of sound levels in a large open cast mine. Assessment of sound pressure levels at each periodic maintenance interval revealed that maximum sound level reduction was achieved at 1000 h maintenance schedule. For other periodic maintenance intervals, ...


    By Inderscience Publishers

  • Application of photocatalytic process for removal of methyl tert-butyl ether from highly contaminated water

    The addition of methyl tert-butyl ether (MTBE) to gasoline as an additive to replace tetraethyl lead has brought about a significant improvement in air quality (Zang and Farnood, 2005a). MTBE raises the oxygen content of gasoline thus helps reduce harmful agent of CO, NOx and ydrocarbon emissions from vehicle exhausts (Jacobs et al., 2001; Zang and Farnood, 2005b; Guillard et al., 2003). About 20 ...


    By University of Tehran

  • Exhaust Purifier for Rock Drill

    Description Gardner Denver MK45H rock drill. Challenge A universal exhaust purifier was required that could easily be retrofitted into the vehicle exhaust pipe. Solution DCL supplied an exhaust purifier with connection cones to match the vehicle exhaust tube diameter. The unit was connected to the exhaust tube with standard muffler u-clamps. Quick-release clamps on ...


    By DCL International Inc.

  • Analysis of Motor Vehicle Exhaust Emissions

    A standard Hiden HPR-20 was used for the detection of various gaseous emissions from a motor vehicle. The mass spectrum was complex due to the mixture of air, hydrocarbons and other combustion products. Analysis of this type is important to detect levels of toxic or hazardous species. Such levels are often strictly controlled by local government legislation thereby forming an important target for ...


    By Hiden Analytical Ltd.

  • 3D stream and vortexes in the urban canopy layer and transport of motor vehicles exhaust gas

    Wind-tunnel experiments were conducted to investigate the transport of motor vehicle exhaust gas in the vicinity of a street. The stream and the vertical and horizontal vortexes in 2D and 3D street canyons were visualised using smoke. They were recorded by video camera and the transport of the exhaust gas by vortexes was then investigated. The vertical vortex plays a significant role in the ...


    By Inderscience Publishers

  • 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

  • Removal of Lead from Gasoline

    On 12th March 1997, the European Commission adopted a proposal from the Environment Commissioner Ritt Bjerregaard on a European Union strategy to combat acidification. The strategy will, by 2010, reduce significantly the extent of the areas in the European Union where the tolerance of sensitive ecosystems to acidity is exceeded. Main elements of the strategy include establishment of national ...


    By The World Bank

  • 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.

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