Browse Publications Technical Papers 941892
1994-10-01

A Physical Mechanism for Deposit Formation in a Combustion Chamber 941892

Combustion chamber deposits in an internal combustion engine are known to impair engine performance. Using a variable temperature probe and retrievable sampling coupons, this study shows that the deposit-forming rate is inversely related to surface temperature, and directly related to the stabilized deposit weight. Together with the well-recognized fact that deposits are good thermal insulators, a deposit-forming mechanism is proposed. As combustion chamber deposits form, in essence the chamber surface is coated with thermal insulators, layer after layer. Consequently, the surface temperature will rise as the deposit grows.
The previously derived critical surface temperature of 310°C is found to be valid in this study for fuel-derived deposits. Furthermore, a critical surface temperature also exists for oil-derived deposits, except that the critical surface temperature is about 60°C higher than that for fuel-derived deposits.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Mechanism of Combustion Chamber Deposit Formation

941889

View Details

TECHNICAL PAPER

ASTM Unwashed Gum and the Propensity of a Fuel to Form Combustion Chamber Deposits

2000-01-2026

View Details

TECHNICAL PAPER

Effect of Thermal Stability of Detergents and Carrier Fluids on the Formation of Combustion Chamber Deposits

961097

View Details

X