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8. Air pollution
The contribution of motor vehicles to atmospheric pollution is very significant, due partly to engine exhaust gases and partly to evaporation losses. Measuring pollutant emissions requires special, expensive and highly accurate measuring equipment, with regular checks on calibration and drift.
8.1 Origin and measurement of evaporation losses
Evaporation losses consist mainly of volatile hydrocarbons. The amount depends on the temperature in the fuel tank and fuel system, the ambient air temperature and the temperature of the vehicle in general. Most evaporation losses come from the fuel itself. They depend on the type of fuel and the design of the fuel tank and supply system. Evaporation losses occur particularly during refuelling and when there are significant...
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Air pollution
Measurement and monitoring of engine lubrication circuits
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