Failure Investigation Report on Different Components of an Automotive Engine
This paper presents an investigation report of different components failure which affect the performance of an automobile engine. The premature breakage of a four cylinder diesel engine block, crankshaft, camshaft, crankshaft bearing, camshaft bush, engine oil pump was reported. It is found that the failure of each component having the same reason for its failure as reported from different place. Thus it affected the performance of the vehicle and it is very expensive for the customer to replace the damaged parts for several times. In this paper, we presented detailed analysis of the causes for the failure along with preventive suggestion to maintain the engine for better performance.
Modified Design And Weight Optimization of IC Engine
For decades much more attention has been devoted to emissions from transport vehicles and to usage of various fuels and fuel blends for vehicle engine operation than to fuel consumption by this giving a chance for under-researched aftermarket products that allegedly reduce engine fuel consumption. The innovative solutions offered by entrepreneurs contained a fossil diesel fuel treated by specific technology and three diesel fuel additives. The promoters of the products referred to pre-existing measurements showing 10 to 30 percent reduction of fuel consumption. Comparative experimental measurements using diesel fuel available in retail with and without usage of the proposed products have been done in laboratory conditions. The tests were performed on a stationary diesel generator RD2.0. Solid, repetitive results have been gained. The results did not confirm any significant positive effect of the products on engine brake specific fuel consumption. Factors affecting errors in this kind of product efficiency investigations for market promotion purposes and causes of positive effects from similar product applications in certain situations are discussed.
Denitrification of PVA-immobilized denitrifying photosynthetic bacterium, Rhodobacter sphaeroides
Abstract A newly isolated denitrifying strain, Rhodobacter sphaeroides NII2 was immobilized in polyvinyl alcohol (PVA) gel, and the properties of the cells in the gel were examined. The immobilized cells had low or almost no denitrification activity, but the cells were activated by incubation in light with culture medium for denitrification containing 0.5% nitrate and no other nitrogen source. Cells grown in the dark were activated by incubation at an earlier stage and to a higher rate than the light-grown cells. The activation was markedly enhanced in the PVA gel with a low cell concentration. The immobilized cells consumed nitrate with a temporary accumulation of NO 2 and evolved nitrogen gas. The immobilized cells could use various organic compounds as electron donors for denitrification. Thus, the immobilized cells were applied to a continuous treatment of synthetic wastewater using an aparatus devised by this laboratory. The results showed an efficient removal of NO 3 -N from the test water.