The invention discloses an automobile engine exhaust
waste heat recoverer and method. The automobile engine exhaust
waste heat recoverer comprises a shell, a heat
insulation layer is arranged on the inner wall surface of the shell, a
water storage tank is arranged on the inner side the heat
insulation layer, and a gas
pipe is arranged in the
water storage tank. A filter layer is disposed at one end of the gas
pipe, an inner groove is formed in the inner wall surface of the gas
pipe, an outer groove is formed in the outer wall surface of the gas pipe, an opening is formed in the other end of the gas pipe, and a gas guiding tube is disposed at the top of the opening. A gas outlet is formed in one end of the gas guiding pipe, and an elastic gas bag is arranged at one end of the gas outlet. The automobile engine exhaust
waste heat recoverer is provided with a gas limiting plate to facilitate filtering of fixed particles in the
exhaust gas through the filter layer, the formation of a
soot layer on the inner wall surface of the gas pipe to affect the heat conduction is prevented, the elastic gas bag is expanded to
push out the gas limiting plate, the cross-sectional area of the gas pipeis reduced, the
discharge rate is reduced, the
exhaust gas stays in the gas pipe for a longer period of time, and the heat
utilization rate of the automobile engine exhaust waste heat recoverer is integrally higher.