During short term engine operation, renewable fuels derived from vegetable oils, are capable of providing good engine performance. In more extended operations, some of the same fuels can cause degradation of engine performance, excessive carbon and lacquer deposits and actual damage to the engine. Moreover, temperatures in the area of the injector tip due to advanced diesel injection systems ma...

Title of dissertation: ESSAYS IN PERSONAL TRANSPORTATION DEMAND AND CONSUMER FINANCE Jaclyn Evans, Doctor of Philosophy, 2016 Dissertation directed by: Professor Roberton C. Williams, III Department of Agricultural and Resource Economics This dissertation is composed of three essays covering two areas of interest. The first topic is personal transportation demand with a focus on price and fuel ...

Maximization of the fuel economy of the lean burn spark ignition (SI) engine strongly depends on precise air-fuel ratio control. A great challenge associated with the air-fuel ratio feedback control is the large variable time delay in the exhaust system. In this paper, a systematic development of an air-fuel ratio controller based on post lean NOx trap (LNT) oxygen sensor feedback using linear ...

This study developed a model with cost functions formulated for different stages of cargo transport operation. A case analysis was performed with actual data from four air cargo traffic routes and eight aircraft types to validate the applicability of the model. The results show that the optimal payloads for various aircraft types vary with fuel price fluctuations. Furthermore, this study determ...