Legislation for treatment of crankcase emissions

The legislation for treatment of crankcase emissons started with CCV in Korea 2004 and was followed by CCV in Japan 2005In 2007 USA introduced legislation allowing both OCV and CCV. For OCV legislation, the emissions from crankcase and tail pipe (exhaust pipe) must be added together.

Closed Crankcase Ventilation (CCV)
Open Crankcase Ventilation (OCV)

Read more about legislation at dieselnet.com.

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