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Description:
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A second law analysis of compression ignition engine was completed using a thermodynamic engine cycle simulation . The major components of availability destruction and transfer for an entire engine cycle were identified and the influence of mode of combustion , injection timing and EGR on availability balance was evaluated .
The simulation pressure data was matched with the available experimental pressure data gathered from the tests on the Isuzu 1 .7 L direct injection diesel engine . Various input parameters of the simulation were changed to represent actual engine conditions .
Availability destruction due to combustion decreases with advanced injection timing and under premixed compression ignition (PCI ) modes ; but it is found to be insensitive to the level of EGR . Similarly , trends (or lack of trends ) in the other components of availability balance were identified for variation in injection timing , EGR level and mode of combustion . Optimum strategy for efficient combustion processes was proposed based on the observed trends . |