Exhaust heat energy recovery system for internal combustion engine

摘要

The invention recovers the high heat energy generated by an exhaust gas clarification catalytic converter intermediately disposed in an exhaust system of an internal combustion engine, as electrical energy without causing an increase in exhaust resistance. To achieve this, a stack 11 in a heat-driven type sound wave generating portion 7 provided at one end portion of a resonance pipe 6 is disposed adjacently to an exhaust gas clarification catalytic converter 5 intermediately disposed in an exhaust system 1 of an internal combustion engine E, one end portion of the stack 11 is heated by the heat generated by the catalytic converter 5, thereby providing the stack 11 with a temperature gradient, and a transducer 8 for converting the sound wave generated by the sound wave generating portion 7 attendant on the temperature gradient into electrical energy is provided at the other end portion of the resonance pipe 6.