VOLUMETRIC FLUID EXPANDER WITH WATER INJECTION

摘要

An exhaust gas energy recovery system includes a combustion engine, a volumetric fluid expander, and a water injection mechanism. The combustion engine includes at least one cylinder and an exhaust gas outlet for conveying an exhaust gas stream at a first pressure. The volumetric fluid expander generates useful work at an output shaft by expanding the exhaust gas stream to a second pressure lower than the first pressure as the exhaust gas stream moves through the volumetric fluid expander. The water injection mechanism injects water into the cylinder at or before an exhaust cycle of the cylinder.