Exhaust gas system with preconditioning
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorThomas Laube
Life of this patent
Estimating the term…
Abstract
A method and a corresponding apparatus are provided for preconditioning an exhaust gas system (100) for discharging and purifying combustion exhaust gases of an internal combustion engine (1), in particular an internal combustion engine (1) of a motor vehicle (200). The method includes operating, air being heated by a heating element (8) in the exhaust gas system (100) to heat air in the exhaust gas system (100), operating a fan in the exhaust gas system (100) for producing a hot air stream with the heated air, using the hot air stream for heating a first catalytic converter (7) of the exhaust gas system (100) to a minimum operating temperature.
Claims20
A method for preconditioning an exhaust gas system for discharging and purifying combustion exhaust gases of an internal combustion engine, the method comprising:
- heating air by a heating element in the exhaust gas system, operating a fan in the exhaust gas system to produce a hot air stream with the heated air, using the hot air stream to heat a first catalytic converter of the exhaust gas system to at least a minimum operating temperature.
A method for operating an exhaust gas system for discharging and purifying combustion exhaust gases of an internal combustion engine, comprising:
- operating the exhaust gas system in a preconditioning mode by performing preconditioning steps with the internal combustion engine switched off, the preconditioning steps including, heating air by a heating element in the exhaust gas system, operating a fan in the exhaust gas system to produce a hot air stream with the heated air, using the hot air stream to heat a first catalytic converter of the exhaust gas system to at least a minimum operating temperature;
- and
- operating the exhaust gas system in a normal operation mode by performing normal operation steps after the preconditioning steps, the normal operation steps including switching off the heating element and the fan and staring the internal combustion engine.
An exhaust gas system for discharging and purifying combustion exhaust gases of an internal combustion engine, the exhaust gas system having an exhaust gas manifold for receiving the combustion exhaust gases from the internal combustion engine;
- the exhaust gas system further having a fan, a first catalytic converter, a heating element for heating air, a first line section, a second line section, a third line section and a bypass line;
- the first catalytic converter having a catalytic converter outlet;
- the exhaust gas manifold being connected to the first line section;
- the second line section, the fan, the first catalytic converter and the catalytic converter outlet being connected to form a first exhaust gas path between the first line section and the third line section;
- the bypass line being a second exhaust gas path between the first line section and the third line section, the first exhaust gas path and the second exhaust gas path forming a circuit.
Dependencies are inferred from the claim text.