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US 7,743,816 B2Granted
Switchable waste gas exchanger
AssigneeBehr GmbH & Co.
InventorsJózsef Mercz, András Szabó, Gyula Tóth
Life of this patent
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Abstract
A switchable waste gas heat exchanger which can be arranged and used in exhaust gas recirculation lines in internal combustion engines, such as in motor vehicles.
Claims37
A switchable exhaust gas heat exchanger comprising:
- an exhaust gas feed line and an exhaust gas discharge for an exhaust gas stream,
- a first and a second exhaust gas passage leading to the exhaust gas discharge,
- a switching valve configured to switch the exhaust gas stream between the exhaust gas passages, and
- a heat exchanger through which a coolant flows which is arranged in the first exhaust gas passage, wherein the second exhaust gas passage routes the exhaust gas stream past the heat exchanger to the exhaust gas discharge,
- wherein the switching valve is configured to be switched as a function of a temperature of the coolant,
- wherein the switching valve includes a water chamber that the coolant flows through.
3 more elements
Dependencies are inferred from the claim text.