Heat shield of automobile exhaust system

The invention discloses a heat shield for an automobile exhaust system, which relates to the technical field of heat insulation of the automobile exhaust system and comprises a heat shield body, the heat shield body is formed by stamping and welding an inner steel plate and an outer steel plate, a closed cavity is formed between the inner steel plate and the outer steel plate, and the cavity is a vacuum cavity. And the height distance between the inner-layer steel plate and the outer-layer steel plate is 1-10mm. Compared with the prior art, the heat insulation effect is achieved by utilizing vacuum. Through verification, in an airflow temperature interval of 400-750 DEG C, the surface temperature of the heat shield is 40-50 DEG C lower than the outer surface temperature of a single-layer metal heat shield and heat insulation cotton with the thickness of 6 mm, and the service life of peripheral parts of an exhaust system is greatly prolonged. 本发明公开了一种汽车排气系统隔热罩，涉及汽车排气系统隔热保温技术领域，包括隔热罩本体，其所述隔热罩本体由内层钢板和外层钢板冲压焊接而成，