The reported discrepancy between theory and experiment for external combustion Stirling engines is explained by the addition of thermal resistance of the combustion gasses to the standard Carnot model. In these cases, the Stirling engine ideal efficiency is not as is normally reported equal to the Carnot cycle efficiency but is significantly lower. A new equation for ideal Stirling engine effic...

This work presents the application of three different timefrequency methods to pressure and structure-borne sound signals to improve combustion diagnosis of internal combustion engines. Increasing engine efficiency and reduction of pollutants imply enhanced knowledge of the combustion process. The methods presented deepen the understanding of the measured signal and stimulate improved algorithm...

Detailed computer simulations demonstrate that all­electric vehicles will be required to meet our energy security and climate change reduction goals. As shown in Figure 1, hybrid electric vehicles (HEV’s) and plug­in hybrid electric vehicles (PHEV’s) both reduce greenhouse gas (GHG) emissions, but neither of these vehicles that still use internal combustion engines will be adequate to cut GHGs ...

The scope of the CORE concept is the development of an action-ready economically viable technical solution to mitigate the environmental, and societal effects of green house gas emissions (GHG) resulting from internal combustion (IC) engines. The developed and proposed technology has been deemed Combustion of Optimized Reactivity in Engines, or CORE for short. In the United States, the transpor...

The combustion of straight vegetable oil (SVO) in internal combustion engines has shown conflicting results in emissions, power, and engine longevity. Many early studies suggested that SVO should not be considered for long term use in diesel engines. However, waste vegetable oil has been fueling adapted vehicles in progressive communities for years. The issues involved in the combustion of SVO ...