Back to results
US 2011/0225959 A1Published application
Motor Vehicle Having an Exhaust Gas System
AssigneeAudi AG
InventorsUwe Sailer, Hubert Vollmer
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAudi AG
InventorsUwe Sailer, Hubert Vollmer
Estimating the term…
The invention relates to a motor vehicle having an internal combustion engine and an exhaust gas system, which comprises an exhaust gas line by means of which the exhaust gas can be removed from the internal combustion engine, as well as an exhaust gas recirculation line by means of which the exhaust gas can be recirculated into the internal combustion engine from the exhaust gas line. The exhaust gas recirculation line has an exhaust gas cooler and a condensate line for removing the condensate from the recirculated exhaust gas, wherein the condensate line is connected with a first end to the exhaust gas recirculation line downstream of the exhaust gas cooler in the direction of flow of the exhaust gas and with a second end to the exhaust gas line. When the motor vehicle is running, the back pressure at the first end of the condensate line is equal to the back pressure at the second end of the condensate line, so that any condensation water that accumulates can be removed without the exhaust gas flowing back into the exhaust gas line from the exhaust gas recirculation line. As an alternative, a closure element for closing the condensate line can be provided. Both variants provide a simple method for removing the condensation water without any necessity for expensive condensate traps or collecting tanks.
A motor vehicle having an internal combustion engine and an exhaust gas system, which comprises an exhaust gas line by means of which the exhaust gas can be removed from the internal combustion engine, as well as an exhaust gas recirculation line by means of which the exhaust gas can be recirculated into the internal combustion engine from the exhaust gas line, wherein the exhaust gas recirculation line has an exhaust gas cooler and a condensate line for removing the condensate from the recirculated exhaust gas, wherein the condensate line is connected with a first end to the exhaust gas recirculation line downstream of the exhaust gas cooler in the direction of flow of the exhaust gas and with a second end to the exhaust gas line, and wherein in that the components of the exhaust gas system are designed in such a way that when the exhaust gas system is in operation, a back pressure at the first end of the condensate line is essentially equal to a back pressure at the second end of the condensate line.
A motor vehicle with an internal combustion engine and an exhaust gas system, which comprises an exhaust gas line by means of which the exhaust gas can be removed from the internal combustion engine, as well as an exhaust gas recirculation line by means of which the exhaust gas can be recirculated into the internal combustion engine from the exhaust gas line, wherein the exhaust gas recirculation line has an exhaust gas cooler and a condensate line for removing the condensate from the recirculated exhaust gas, wherein the condensate line is connected with a first end to the exhaust gas recirculation line in the direction of flow of the exhaust gas downstream of the exhaust gas cooler and with a second end to the exhaust gas line, wherein characterized in that a closure element is provided, which closes the condensate line in a closing position and releases the condensate line in an opening position.
In a motor vehicle provided with an internal combustion engine including an exhaust gas line, an exhaust gas recirculation line connected to said exhaust gas line and communicable with said engine, and means disposed in said exhaust gas recirculation line for cooling recirculated exhaust gas, a condensed vapor removal device comprising a line interconnecting said exhaust gas recirculation line at a point downstream of said cooling means and said exhaust gas line in a manner providing a diminishing pressure gradient along the length thereof.
Dependencies are inferred from the claim text.