Crankcase ventilation gases are also piped to the air intake system, this gas contains oil mist and water in the form of condensation. The hot exhaust gas contains carbon (soot) and other by-products of combustion that would not normally attach to the intake manifold if not for another emission control process called Closed Crankcase Ventilation (CCV). In the EGR process some exhaust gases are piped to the air intake system, this modifies the combustion process thereby lowering Nitrous Oxide emissions produced. This requires some explanation: Modern diesel engines suffer from a condition brought about by an emission control process called Exhaust Gas Recirculation (EGR). The result is that the build-up of deposits is GREATLY reduced.Įssentially it’s to prevent or reduce carbon deposit accumulation in the intake manifold of engines. By installing an Oil Mist Separator, often called a Catch Can, the oil mist and water vapour are substantially removed from the combination thereby taking away the ingredient that allows the soot to stick. Removing the deposits involves disassembly of the intake system from the engine, both time consuming and expensive. These deposits build up over time to a point where they severely restrict the flow of air, causing reduced performance and fuel efficiency. It’s the combination of the oil with soot that creates the problem. When the crankcase gases from CCV combine with the exhaust gases from EGR, the oil mist mixes with the soot particles to produce a mixture that attaches to the walls of the intake manifold.
The hot exhaust gas contains carbon (soot) and other by-products of combustion that would not normally attach to the intake manifold if not for another emission control process called Closed Crankcase Ventilation (CCV).Ĭrankcase ventilation gases are also piped to the air intake system, this gas contains oil mist and water in the form of vapour. Modern diesel engines suffer from a condition brought about by an emission control process called Exhaust Gas Recirculation (EGR).
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