Abstract: The invention concerns an exhaust gas system (1) for an internal combustion engine (11), said system (1) comprising an exhaust gas conduit (13), a particulate filter (15) and a controllable exhaust valve (17) arranged in the exhaust gas conduit (13, said exhaust valve (17) being intended for increasing the exhaust gas temperature (TeXh) by increasing an exhaust gas back pressure in situations where the exhaust gas temperature (TeXh) is too low for performing a regeneration process of the particulate filter (15), a temperature measurement means (12) for determining an exhaust gas temperature (TeXh), a first pressure measurement means (14, 14a) for determining an exhaust gas pressure upstream of the valve (17), a control unit (24) for receiving signals from the measurement means (12, 14) and for controlling the valve (17).