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Also a small amount of solid matter, or particulates, is emitted in the form of lead from the tetraethyl lead used in fuel to increase its octane rating. It was found that these pollutants were having an adverse effect on the environment and in extreme cases were actually causing visible ?smog.' But exhaust emissions in pre-70's cars were only accounting for 55% of automotive air pollutants. Another major source was emissions of hydrocarbons from the engine's crankcase. They occurred because during combustion there is a small amount of gas ?Blow-By' past the rings, consisting mainly of unburned fuel...
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Common topics in this essay:
- Internal Combustion Engine
- Alternatives To Internal-combustion Engines
- Catalytic Converters
- Catalytic Converters
- Catalytic Converters
- Internal Combustion Engines
- Internal Combustion Engines
- Internal combustion engine
- Alternatives for Gasoline internal combustion Engine
- Combustion and cooling performance in an aero-engine annular combustor
- Future Directions For The Internal Combustion Engine And How It Has Af
- Internal Combustion Engine
- internal combustion engines of the future
- internal combustion
- The Process Of an Internal Combustion Engine
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