Turbo Diesel Pick Up Trucks And Fuel Dilution Problems

Turbo Diesel Pick Up Trucks and Fuel Dilution Problems

by

Dominnick

Not everybody will expertise dilution issues, as it can rely largely on how you use your vehicle. Post 2007 turbo diesels are equipped with a Diesel particulate filter as mandated by the environmental protection agency. These filters reduce the soot emitted by as abundant as eighty five%. Once therefore long, these filters have to go through a cleaning process called regeneration. Regeneration can occur throughout operation when exhaust gas temperatures reach one,one hundred degrees. This happens often when the engines are worked as intended, such as towing and hauling and is named passive regeneration. It’s when these engines are operated around town with no load is when temperatures are to low to passively burn off the soot.

When temperatures don’t reach 1,100 degrees, a vigorous regeneration should take place. Two systems are used. In-stream injection and In-cylinder post injection. What happens is raw diesel fuel is introduced into the diesel particulate filter increasing the inner temperature to burn off the soot that has accumulated.

With In-stream injection, the fuel is introduced through a separate injector either behind the turbo charger or in the exhaust stream just prior to the particulate filter. This sort of active regeneration is essentially used on medium to significant-duty diesel engines. In-stream does not contribute to fuel dilution.

In cylinder post injection has been adopted by the makers of lighter turbo diesel trucks, mainly as a result of of the lower cost. With this system, the diesel fuel is injected directly into the cylinders with the current injectors however on the exhaust stoke moreover because the compression stroke, sending the unburned fuel through the exhaust ports to the particulate filter and be burned that way. This method works well at delivering the fuel to the particulate filter however has the drawback of promoting fuel dilution of the crankcase oil.

As the fuel is injected on the exhaust stroke, fuel is in a position to pass by piston rings and wash down the cylinder walls as well, entering the crankcase and diluting the oil. Diesel fuel may be a solvent and can cut back oil viscosity and film strength of the oil. An increase in oxidation will conjointly occur.

At this point, there is no correlation between fuel dilution and abnormal engine wear. This is a rather new issue and still being studied. Condemnation limits are set at 5%. Oil analysis samples have shown seven to 10% dilution rates.

If you have got one of these turbo diesels and work it exhausting, active regeneration can be at a minimum, as can the possibility of upper limits of fuel dilution. It can be helpful for you to have your oil analyzed periodically to see what the saturation level could be in your oil. It would additionally be a sensible plan to use premium oil that may better face up to the results of fuel dilution.

In closing, for the 2011 Ford and General Motors are changing to a system referred to as selective catalytic reduction, eliminating In-cylinder post injection. The Dodge Cummins turbo charged pickups will still use In-cylinder Injection for the upcoming year.

Dominnick has been writing articles online for nearly 2 years now. Not only does this author specialize in Environmental Issues, you can also check out his latest website about:

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