| 摘要 |
<p>An engine (1) exhaust gas control system for internal combustion engine (1), the system comprising: - an exhaust gas line (2) is provided for leading the engine (1) exhaust gases out, - the exhaust gas line (2) comprises an exhaust gas aftertreatment device (3) for reducing unwanted emissions of the engine (1), - an exhaust gas heat recovery heat exchanger (4) is in the exhaust gas line (2) downstream of the exhaust gas aftertreatment device (3), - an exhaust gas heating device (5) is in the exhaust gas line (2) upstream of the exhaust gas aftertreatment device (3), - a heating medium line (45) from the exhaust gas heat recovery heat exchanger (4) to the exhaust gas heat- ing device comprises (5) a compressor (43) for providing heating medium to the exhaust gas heating device (5), - a heating medium line (54) from the exhaust gas heating device (5) to the exhaust gas heat recovery heat exchanger (4) comprises an expansion unit (53) to expand and lower the pressure of the heating medium.</p> |
