Deposit Formation in Diesel Engine and Its Effects
- Author Thi Minh Hao Dong
- Co-Author Thanh Hai Truong
- DOI
- Country : Vietnam
- Subject : Transport
Keywords : deposit, internal combustion engine, deposit formation, deposit structure, heat transfer
Abstract
Carbon deposit buildup on diesel engine components such as piston heads, fuel injectors and intake valves is a bigger problem than it is for gasoline engines. There is a federal requirement that certain detergents be added to gasoline at the refinery itself, but there is no such mandate for adding detergents to diesel fuel. For this and many other reasons, diesel engines are more susceptible to carbon deposit buildup. Most of the blame, however, has been assigned to the fact that the fuel spray from a diesel injector goes directly into the cylinder bypassing, for example, the back of the intake valve where deposits are likely to form. The increasing use of high pressure common rail fuel systems have also increased engine deposits. Other reasons for diesel engine carbon deposits are the use of low-quality fuel, short cold weather trips, excessive idling, infrequent oil changes and even dirty air filters. Once carbon buildup begins to accumulate on various surfaces inside the engine and is left untreated, the vehicle loses power, becomes sluggish and causes a significant increase in emissions and reduction in fuel economy. No doubt all of this erodes the mileage and performance gains expected of a diesel engine and if we are talking about a fleet of 1,000 vehicles or more, it ultimately hurts the owner's profit margin.
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