Exhaust system

Abstract

An exhaust system includes an exhaust gas-carrying pipe and a bypass to the exhaust gas-carrying pipe. The bypass has at least one inlet pipe and at least one outlet pipe. An exhaust gas sensor is arranged in the bypass between the inlet pipe and the outlet pipe in such a way that exhaust gas flowing through the bypass flows through the exhaust gas sensor. An accelerator accelerates the gas flow downstream of the exhaust gas sensor and is coupled to the outlet pipe. At least one inlet portion extends from the inlet pipe to the exhaust gas sensor, the flow cross-section of which is smaller than the flow cross-section of the inlet pipe and opens into an inlet of the exhaust gas sensor.

1 . An exhaust system comprising:
 an exhaust gas-carrying pipe;   a bypass to the exhaust gas-carrying pipe, the bypass having at least one inlet pipe and at least one outlet pipe;   an exhaust gas sensor arranged in the bypass between the at least one inlet pipe and the at least one outlet pipe in such a way that exhaust gas flowing through the bypass flows through the exhaust gas sensor;   an accelerator accelerates gas flow downstream of the exhaust gas sensor and is coupled to the outlet pipe; and   at least one inlet portion extends from the at least one inlet pipe to the exhaust gas sensor, wherein a flow cross-section of the at least one inlet portion is smaller than a flow cross-section of the at least one inlet pipe and opens into an inlet of the exhaust gas sensor.   
     
     
         2 . The exhaust system according to  claim 1 , wherein the exhaust gas sensor is mounted in a housing, the bypass extending through the housing and the at least one inlet portion being formed as a channel in the housing. 
     
     
         3 . The exhaust system according to  claim 2 , including a receptacle for the exhaust gas sensor formed in the housing, an inner contour of the receptacle being adapted to an outer contour of a portion of the exhaust gas sensor accommodated in the housing. 
     
     
         4 . The exhaust system according to  claim 3 , wherein the at least one inlet portion overlaps with the receptacle for the exhaust gas sensor and the inlet of the exhaust gas sensor is arranged in a region of the overlap. 
     
     
         5 . The exhaust system according to any of  claim 2 , wherein the housing is mounted on a plate having a base surface that is larger than a base surface of the housing and that is used as a flange for fastening the housing to the exhaust system. 
     
     
         6 . The exhaust system according to  claim 1 , wherein the accelerator is fed with compressed gas from a compressed gas source. 
     
     
         7 . The exhaust system according to  claim 6 , including a connection for the compressed gas source in a housing for the exhaust gas sensor, and wherein the accelerator comprises a through-channel that extends through the housing from the connection, and with the at least one outlet pipe adjoining the through-channel. 
     
     
         8 . The exhaust system according to  claim 7 , wherein an outlet portion is formed in the housing and opens into the through-channel. 
     
     
         9 . The exhaust system according to  claim 1 , wherein the at least one inlet pipe and the at least one outlet pipe protrude into the exhaust gas-carrying pipe and an end portion of the at least one inlet and outlet pipes, which end portion is arranged in the exhaust gas-carrying pipe, in each case extends parallel to the exhaust gas-carrying pipe at least in portions. 
     
     
         10 . The exhaust system according to  claim 9 , wherein the end portion of the at least one inlet pipe faces upstream and the end portion of the at least one outlet pipe faces downstream. 
     
     
         11 . The exhaust system according to  claim 8 , wherein the outlet portion extends parallel to the at least one inlet portion at least in portions.