Cipolat, Daniele2017-06-082017-06-081991http://hdl.handle.net/10539/22819A Thesis submitted to the faculty of Engineering, University of the Witwatersrand, Johannesburg, in fulfillment of the requirements for the degree of Doctor of PhilosophyThermodynamic analysis techniques for the study of combustion in compression ignition engines were developed and refined. The techniques were validated against test runs of diesel fuelling, and were then applied to the almost unexplored case of combustion of aspirated dimethyl either (DME) acting as ignition promotor and supplementary fuel, and injected methanol as main fuel. Combustion chamber pressure versus crank angle data were captured for single engine cycle on normal fuelling (methanol and DME), fuelling with DME alone and pure motoring (no fuel) all at essentially identical engine conditions. These data were analysed by a number of mutually complementary techniques.enDiesel motor -- CombustionThermodynamicsMethanol as fuelMethyl etherThesis