Heat recovery system for an internal combustion engine
First Claim
1. A heat recovery system for an internal combustion engine, comprising:
- a heat exchanger, through which a fluid heat-transfer medium flows, for transferring heat from an exhaust system to the heat-transfer medium,a heat engine, through which the heat-transfer medium flows, for converting the heat transferred to the heat-transfer medium into mechanical output work,a cyclically closed line system for connecting the heat exchanger to the heat engine,a positive displacement pump for conveying the heat-transfer medium through the line system in a predefined flow direction via mechanical drive work,a drive, which is hermetically sealed off from the heat-transfer medium, for feeding the drive work to the positive displacement pump, andan output, which is hermetically sealed off from the heat-transfer medium, for discharging the output work from the heat engine;
wherein the heat engine includes an input operatively connected to the output for transmitting the output work to the output, and wherein the heat engine has a fluid-tight wall separating the input from the output, the wall hermetically sealing off the output from the heat-transfer medium.
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Accused Products
Abstract
A heat recovery system for an internal combustion engine may include a heat exchanger, through which a fluid heat-transfer medium flows, for transferring heat from an exhaust gas system to the heat-transfer medium. A heat engine, through which the heat-transfer medium flows, may be included for converting the heat transferred to the heat-transfer medium into mechanical output work. A cyclically closed line system may be included for connecting the heat exchanger to the heat engine. The system may include a positive displacement pump for conveying the heat-transfer medium through the line system in a predefined flow direction via mechanical drive work. The system may include a drive, which is hermetically sealed off from the heat-transfer medium, for feeding the drive work to the positive displacement pump, and an output, which is hermetically sealed off from the heat-transfer medium, for discharging the output work from the heat engine.
8 Citations
18 Claims
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1. A heat recovery system for an internal combustion engine, comprising:
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a heat exchanger, through which a fluid heat-transfer medium flows, for transferring heat from an exhaust system to the heat-transfer medium, a heat engine, through which the heat-transfer medium flows, for converting the heat transferred to the heat-transfer medium into mechanical output work, a cyclically closed line system for connecting the heat exchanger to the heat engine, a positive displacement pump for conveying the heat-transfer medium through the line system in a predefined flow direction via mechanical drive work, a drive, which is hermetically sealed off from the heat-transfer medium, for feeding the drive work to the positive displacement pump, and an output, which is hermetically sealed off from the heat-transfer medium, for discharging the output work from the heat engine; wherein the heat engine includes an input operatively connected to the output for transmitting the output work to the output, and wherein the heat engine has a fluid-tight wall separating the input from the output, the wall hermetically sealing off the output from the heat-transfer medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)
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14. An internal combustion engine, comprising:
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a combustion chamber for burning a fuel, an exhaust system, which is fluid-connected to the combustion chamber, for discharging a combustion waste gas from the combustion chamber, and a heat recovery system thermally connected to the exhaust system, the heat recovery system including; a heat exchanger for transferring heat from the exhaust system to a fluid heat-transfer medium; a heat engine for converting the heat transferred to the heat-transfer medium into mechanical output work, the heat engine including an input, an output and a fluid-tight wall separating the input from the output, wherein the input is operatively connected to the output without penetrating the wall via a contactless magnetic coupling and the output is hermetically sealed from the heat-transfer medium; a closed line system for connecting the heat exchanger to the heat engine; and a positive displacement pump for conveying the heat-transfer medium through the line system in a predefined flow direction via mechanical drive work, the pump including a drive hermetically sealed from the heat-transfer medium for generating the drive work; wherein the drive includes a bellows fillable with a hydraulic liquid, and a lifting piston movably mounted in the hydraulic liquid, wherein movement of the lifting piston hydromechanically expands the bellows via the hydraulic liquid. - View Dependent Claims (16, 17, 18)
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Specification