Heavy Duty Diesel Products

Closed Crankcase Ventilation Systems (CCVs)

Unlike exhaust emissions, crankcase gases on pre-2010 model year engines would normally escape into the environment through the crankcase vent tube. Newer engines are now mandated to employ crankcase ventilation under Environmental Protection Agency (EPA) emission regulations.

Contaminated crankcase emissions are a serious problem for diesel engine owners and the environment. These emissions are a result of gas escaping past the piston rings due to high cylinder pressure into the crankcase.

In the crankcase, these gases are contaminated with oil mist, water, etc. These contaminated emissions escape through the diesel engine breather into the engine compartment and the engine intake system or into the environment in general.

What is a CCV System?

A closed crankcase ventilation system, or "CCV," assists in elevating the level of overall vehicle emission reduction by eliminating crankcase emissions.

CDTi's Closed Crankcase Ventilation System

In combination with select emission control solutions, our EPA-verified CCV system elevates the level of exhaust emission reduction by eliminating crankcase emissions.

Unlike exhaust emissions, crankcase gases normally escape into the environment through the crankcase vent tube. However, our system is truly a closed crankcase ventilation system — effectively eliminating 100% of crankcase emissions at all times.

The system is designed to improve passenger compartment air quality, which is particularly important in all types of buses (school, shuttle, urban, etc.), as well as refuse and municipal fleets, while improving air quality for personnel working in the vicinity of an operating piece of equipment. In addition, CCV systems also increase efficiency by reducing fouling in the diesel engine compartment of charge air coolers, radiators, etc.

Our CCV system has been proven by the EPA to reduce pollutants released from closed crankcases when combined with a diesel oxidation catalyst by up to 40%*.

When paired with a diesel oxidation catalyst, our CCV system can lead to a cleaner engine environment, improve vehicle and equipment reliability with less need for maintenance, keep the engine compartment and components cleaner, and reduce the use of oil and lower vehicle operating costs.

CCV systems from CDTi are EPA-verified in combination with our AZ diesel oxidation catalyst products, helping customers not only lower emissions, but lower operating costs as well.

*Current verified technology reduction values dependent upon the specific engine type and application.

To learn more about our diesel oxidation catalysts and how our products meet EPA Emission Regulations, click here.