Exhaust bypass device for protecting engine turbocharger

The invention provides an exhaust bypass device for protecting an engine turbocharger and belongs to the technical field of engine turbocharger parts. One end of a main channel (2) of a device shell body (1) of the exhaust bypass device for protecting the engine turbocharger communicates with an exhaust manifold, and the other end of the main channel (2) communicates with a supercharger; a by-passpipeline (3) communicates with an exhaust tail pipe; a driving valve (5) is arranged on an executing rod I (4) in the main channel (2); a driven valve (7) is arranged on an executing rod II (6) in the by-pass pipeline (3); the executing rod I (4) is connected with a driving motor I (8); and the executing rod II (6) is connected with a driving motor II (9). According to the exhaust bypass device for protecting the engine turbocharger, the structure is simple, circulating paths for exhaust gas entering the turbocharger can be switched conveniently and reliably in different working conditions, the supercharger system ca