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US 10,655,520 B2Granted
Exhaust system
AssigneeEberspächer Exhaust Technology GmbH & Co. KG
InventorsJan Krüger, Günter Eberspach
Life of this patent
Estimating the term…
Abstract
An exhaust system for an internal combustion engine, especially in a vehicle, comprising at least one first catalytic converter unit (18) with at least one catalytic converter device (24), through which internal combustion engine exhaust gas can flow and a fuel-operated heater (36). The at least one first catalytic converter unit (18) comprises a heat exchanger volume (50) through which heater exhaust gas leaving the heater (36) can flow.
Claims20
An exhaust system for an internal combustion engine, the exhaust system comprising:
- at least one catalytic converter unit with at least one catalytic converter device through which internal combustion engine exhaust gas flows and the at least one catalytic converter unit comprising a heat exchanger volume;
- and
- a fuel-operated heater with an operative connection between a heater exhaust of the fuel-operated heater and the heat exchanger volume, whereby heater exhaust gas leaving the heater flows through the heat exchanger volume, the at least one catalytic converter unit comprising an internal combustion engine exhaust gas flow space through which internal combustion engine exhaust gas flows, the at least one catalytic converter device being arranged in the internal combustion engine exhaust gas flow space, the heat exchanger volume comprising a heater exhaust gas flow space enclosing the internal combustion engine exhaust gas flow space at least in a length area of the internal combustion engine exhaust gas flow space containing the at least one catalytic converter device.
A method for operating an exhaust system, the method comprising:
- providing an exhaust system for an internal combustion engine, the exhaust system comprising:
- at least one catalytic converter unit with at least one catalytic converter device through which internal combustion engine exhaust gas flows, the at least one catalytic converter unit comprising an internal combustion engine exhaust gas flow space through which internal combustion engine exhaust gas flows, the at least one catalytic converter device being arranged in the internal combustion engine exhaust gas flow space;
- a heat exchanger volume;
- and
- a fuel-operated heater with an operative connection between a heater exhaust of the fuel-operated heater and the heat exchanger volume, wherein heater exhaust gas leaving the heater flows through the heat exchanger volume, the heat exchanger volume comprising a heater exhaust gas flow space enclosing the internal combustion engine exhaust gas flow space at least in a length area of the internal combustion engine exhaust gas flow space containing the at least one catalytic converter device;
- operating the fuel operated heater in a catalytic converter unit temperature control mode at least if a temperature in the area of the at least one first catalytic converter unit is below a first threshold temperature in a combustion operation generating heater exhaust gas flowing through the heat exchanger volume.
3 more elements
A drive system for a vehicle, the drive system comprising:
- an internal combustion engine;
- and
- an exhaust system comprising:
- at least one catalytic converter unit with at least one catalytic converter device through which internal combustion engine exhaust gas flows;
- a heat exchanger volume;
- and
- a fuel-operated heater with an operative connection between a heater exhaust of the fuel-operated heater and the heat exchanger volume, whereby heater exhaust gas leaving the heater flows through the heat exchanger volume, the at least one catalytic converter unit comprising an internal combustion engine exhaust gas flow space through which internal combustion engine exhaust gas flows, the at least one catalytic converter device being arranged in the internal combustion engine exhaust gas flow space, the heat exchanger volume comprising a heater exhaust gas flow space enclosing the internal combustion engine exhaust gas flow space at least in a length area of the internal combustion engine exhaust gas flow space containing the at least one catalytic converter device.
4 more elements
Dependencies are inferred from the claim text.