Automobile mechanical energy-saving device

The invention belongs to the technical field of energy saver, in particular to an automobile mechanical energy-saving device including a tail gas transfer pipe, the left end of the tail gas transmission pipe is provided with an intake screw joint, the inner cavity of the intake screw joint is provided with a filtering mechanism, the filter mechanism comprises an outer frame and a filter screen clamped on the outer frame. The bottom of the tail gas transmission pipe is provided with a generator through a motor bracket. By using the tail gas of an automobile as a power driving source of the generator, the power generation can be carried out in the driving process of the automobile, and the power generation time is long, and the power generation quantity is guaranteed. By setting up the filter mechanism, the influence of the dirt in the tail gas on the driving propeller can be reduced. By setting air guide elbow, one-way air pressure valve, air guide straight pipe and other structures, the pressure can be releas