Device for exhaust gas heat utilization
AssigneesFaurecia Emissions Control Technologies, Germany GmbH, Bayerische Motoren Werke Aktiengesellschaft
InventorsAndreas Eder, Marco Ranalli, Martin Adldinger
Life of this patent
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Abstract
A device for exhaust gas heat utilization in internal combustion engines of motor vehicles includes an exhaust gas line which in sections includes a first exhaust gas flow duct and a second exhaust gas flow duct connected in parallel. A valve flap is movable between a closed position and an open position, which can selectively close or at least partly clear a flow cross-section of the first or second exhaust gas flow duct. At least one thermoelectric generator module is thermally coupled with the second exhaust gas flow duct and with a cooling circuit. The device also includes an expansion material actuator for temperature-dependent actuation of the valve flap.
Claims19
A device for exhaust gas heat utilization in internal combustion engines of motor vehicles, comprising:
- an exhaust gas line which in sections includes a first exhaust gas flow duct and a second exhaust gas flow duct connected in parallel,
- a valve flap movable between a closed position and an open position, which can selectively close or at least partly clear a flow cross-section of the first exhaust gas flow duct,
- at least one thermoelectric generator module which is thermally coupled with the second exhaust gas flow duct and with a cooling circuit,
- an expansion material actuator for temperature-dependent actuation of the valve flap,
- a spring element that urges the valve flap into a closed position,
- wherein upon exceedance of a predeterminable temperature limit at the expansion material actuator, the expansion material actuator urges the valve flap into an open position, and wherein a temperature-sensitive material of the expansion material actuator is surrounded by the exhaust gas stream, and wherein the temperature-sensitive material increasingly expands with rising temperature of the exhaust gas stream.
A device for exhaust gas heat utilization in internal combustion engines of motor vehicles, comprising:
- an exhaust gas line which in sections includes a first exhaust gas flow duct and a second exhaust gas flow duct connected in parallel,
- a valve flap movable between a closed position and an open position, which can selectively close or at least partly clear a flow cross-section of the first or second exhaust gas flow duct,
- at least one thermoelectric generator module which is thermally coupled with the second exhaust gas flow duct and with a cooling circuit, and
- an expansion material actuator for temperature-dependent actuation of the valve flap, and wherein the expansion material actuator is thermally coupled with an exhaust gas stream and thus acted upon by an exhaust gas temperature, and wherein a temperature-sensitive material of the expansion material actuator is surrounded by the exhaust gas stream, and wherein the temperature-sensitive material increasingly expands with rising temperature of the exhaust gas stream.
A device for exhaust gas heat utilization in internal combustion engines of motor vehicles, comprising:
- an exhaust gas line which in sections includes a first exhaust gas flow duct and a second exhaust gas flow duct connected in parallel, wherein the second exhaust gas flow duct has an annular cross-section which surrounds the first exhaust gas flow duct,
- a valve flap movable between a closed position and an open position, which can selectively close or at least partly clear a flow cross-section of the first or second exhaust gas flow duct,
- at least one thermoelectric generator module which is thermally coupled with the second exhaust gas flow duct and with a cooling circuit,
- an expansion material actuator for temperature-dependent actuation of the valve flap, and wherein a temperature-sensitive material of the expansion material actuator is surrounded by the exhaust gas stream, and wherein the temperature-sensitive material increasingly expands with rising temperature of the exhaust gas stream.
Dependencies are inferred from the claim text.