Diesel engine failures due to combustion disturbances, caused by fuel with insufficient lubricity

Abstract

A large number of diesel engine failures have been reported in the immediate past. The large proportion of these engines that were investigated, were recently overhauled engines that failed soon after the overhaul process. In some cases, these engines failed on the dynamometer, while it was tested before delivery to the customer. The most common failure on a large number of these engines, were pistons seizing in the crown region causing seizure of the piston in the cylinder. Tests were done to correlate the lubricity of the fuel that was used and the failure of the engines. Limits were obtained from which it could be determined when the fuel was not of a proper quality and where engine failures took place. It is finally recommended that the specification SABS 342 be amended to include the requirements for the lubricity of diesel fuels.

Diesel Engine With Different Kind of Injection Systems Exhaust Gas Analysis / Dyzelinių Variklių Su Įvairiomis Įpurškimo Sistemomis Išmetamųjų Dujų Tyrimas

“…Bendrai vertinant, pastebėta, kad žalingų vidaus degimo variklių išskiriamų medžiagų kiekis ir jų toksiškumas priklauso nuo automobilio variklio techninės būklės, darbo režimo, kuro kokybės, įpurškimo sistemos (Guibet, Faure-Birchem 1999;Wielligh et al 2003). Pagal tai, kokį poveikį aplinkai turi teršalai, yra skiriami ekologiškai neutralūs, ekologiškai aktyvūs ir toksiški teršalai (2 pav.).…”

Lubricating Aspects of Automotive Fuels

“…Fuel quality in recent years became increasingly important, not only for its role in the actual performance of the vehicles, but also for its impact on the emissions. However, the fuel pump at the service stations is the point at which the actual specifications of the fuels should be ascertained [43]. In this chapter, results are presented on the gasoline properties impact on lubricity, based on the study of numerous petrol samples.…”

Modification of Canola Oil Physicochemical Properties by Hexane and Ethanol with Regards of Its Application in Diesel Engine

“…Difficulties in the use of canola oil to power diesel engines include different physicochemical properties compared to diesel oil, such as the density, viscosity, surface tension, cloud point, and fractional composition. Canola oil also has a high cold filter blocking temperature of approximately −12 • C (CFPP, cold fuel plugging point) [18][19][20]. It should be remembered that density, viscosity, and surface tension mainly affect the course of the pressing and injection process and the ease of creating a fuel-air mixture, while the fractional composition, the vapor pressure of the fuel, and the calorific value affect the combustion process and the energy parameters obtained [16].…”