Patent ID: 8516795
Filing Date: 2013-08-27
Classification: G01N

Abstract:
1. An exhaust gas sensor device for detecting a concentration of at least one exhaust gas component in the exhaust gas line of an internal combustion engine, comprising: a lambda sensor for detecting the oxygen content of the exhaust gas; at least one gas-sensitive field-effect transistor for detecting an oxygen content of the exhaust gas; and a control unit configured to perform an engine control based on the oxygen content of the exhaust gas detected by each field-effect transistor when an operating temperature of the lambda sensor has not been reached, and based on the oxygen content of the exhaust gas detected by the lambda sensor when the lambda sensor has reached the operating temperature; wherein the at least one gas-sensitive field effect transistor is located in an exhaust gas line, downstream of the lambda sensor and downstream of a DeNOx catalyst, and wherein the lambda sensor is located upstream of the DeNOx catalyst.