Thus, this concept recovers energy from two waste heat sources of current engine designs and converts heat normally discarded to useable power and work. An ideal thermodynamics model of the exhaust gas compression, water injection at top center, and expansion was more » used to investigate this modification that effectively recovers waste heat from both the engine coolant and combustion exhaust gas.
Early exhaust valve closing during the exhaust stroke coupled with water injection are employed to add an additional power stroke at the end of the conventional four-stroke Otto or Diesel cycle. The engine cycle can be thought of as a 4 stroke Otto or Diesel cycle followed by a 2-stroke heat recovery steam cycle. =, number = 1049,Ī concept is presented here that adds two additional strokes to the four-stroke Otto or Diesel cycle that has the potential to increase fuel efficiency of the basic cycle.
