Search for dissertations about: "Exhaust gases"

Showing result 11 - 15 of 74 swedish dissertations containing the words Exhaust gases.

  2. 11. Silicon carbide field-effect devices studied as gas sensors for exhaust gas monitoring

    Author : Peter Tobias; Ignaz Eisele; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; silicon carbide; high temperature; gas sensors; field effect devices; MISdevices; Schottky diodes; experimental design; reaction kinetics; mass transport; car exhaust; multipoint injection; response times; cylinder specific; on-board diagnosis;

    Abstract : Metal-insulator-silicon carbide (MIS) structures have been studied as gas sensors. We have investigated how the sensors detect gases, how fast they do that, and how they could be used for exhaust gas monitoring.We have prepared simple field-effect devices, MIS-capacitors and Schottky diodes, on silicon carbide with platinum gates. READ MORE

  4. 12. Corrosion of Stainless Steel in Diesel Exhaust Gas After-treatment Systems with Urea Injection

    Author : Johanna Nockert; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; urea; stainless steel; thermal cycling; High temperature corrosion; AES; XPS; condensate; SCR; diesel exhaust;

    Abstract : The demands on lowering the emissions from fossil fuel keep increasing. Together with higher demands of longer component lifetime and lighter vehicles for lower fuel consumption this has led to an increasing use of stainless steels in exhaust after-treatment systems. READ MORE

  5. 13. Volatility and number measurement of diesel engine exhaust particles

    Author : Hanna Bernemyr; Hans-Erik Ångström; Nigel Clark; KTH; []
    Keywords : particle emissions; measuring methods; particle number measurements; dilution; rotating disc diluter; v-TDMA; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Today, emission legislations for engine exhaust particles are mass based. The engines of today are low-emitting with respect to particle mass, with the emissions approaching the detection limit of the current measurement method. This calls for new and improved measurement methods. READ MORE

  6. 14. Numerical Computations of Internal Combustion Engine related Transonic and Unsteady Flows

    Author : Olle Bodin; Laszlo Fuchs; Daniel Lörstad; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LES; Transonic flow; Hysteresis; Shock boundary-layer interaction; Exhaust valve; Fluid mechanics; Strömningsmekanik;

    Abstract : Vehicles with internal combustion (IC) engines fueled by hydrocarbon compounds have been used for more than 100 years for ground transportation. During the years and in particular in the last decade, the environmental aspects of IC engines have become a major political and research topic. READ MORE

  7. 15. Occupational air pollutants and non-malignant respiratory disorders especially in miners

    Author : Ulf Hedlund; Per Gustavsson; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; respiratory symptoms; occupational epidemiology; mining; asthma; airway inflammation; dust; diesel exhaust; quartz; chronic bronchitis; silicosis; Occupational and Environmental Medicine; arbets- och miljömedicin;

    Abstract : Aim. To assess associations between occupational air pollution and respiratory health, especially in miners.Background. Indications of associations between occupational exposure or social economic status and respiratory health have been found in several population-based studies. READ MORE