Robert Boschgmbh

Derya Lindenmeier

Andreas Kugi

Adrian Trachte

Gregory Rewers

Matthias Bitzer

Christian Fleck

Herwig Koppauer

Carolina Passenberg

Michael Richter

Thomas Specker

Wolfgang Kemmetmueller

The invention relates to a control circuit () for a waste heat recovery system () for a heat engine (). The waste heat recovery system () comprises at least one evaporator () for converting waste heat from the exhaust gas () generated by the heat engine () into a working medium (), at least one expansion machine () which can be driven by the working medium (), at least one condenser () for condensing the working medium () expanded in the expansion machine () into the liquid state (), and at least one conveying device () for increasing the pressure of the condensed working medium () and conveying same into the evaporator (). The control circuit () influences at least one control variable which controls the energy transmission from the exhaust gas () to the working medium () and/or the energy transmission from the working medium () to the expansion machine (). The control circuit () is designed to regulate the specific enthalpy hand/or the temperature Tof the working medium () entering the expansion machine () to a target value h, T, wherein the target value h, Tdepends on the pressure pof the working medium () entering the expansion machine (). The invention also relates to a waste heat recovery system () for an internal combustion engine of a vehicle () in the form of a heat engine () comprising the control circuit () and to a corresponding computer program.

Control circuit for waste heat recovery systems

The invention relates to a waste-heat utilization assembly () of an internal combustion engine (), comprising a working circuit () that conducts a working fluid. The working circuit () is equipped with a feed pump (), an evaporator (), an expansion machine () and a condenser () in the direction of flow of the working fluid. Additionally, the evaporator () is also arranged in an exhaust tract () of the internal combustion engine (). The exhaust tract () is equipped with an exhaust bypass channel () parallel to the evaporator (), and the exhaust tract () is equipped with an exhaust bypass valve (), by means of which the distribution of the mass flow rate of the exhaust of the internal combustion engine () to the evaporator () and to the exhaust bypass channel () can be controlled. The waste-heat utilization assembly () further comprises a cooling device () which conducts a coolant, and the condenser () is arranged in the cooling device (). Furthermore, at least one temperature sensor () is arranged in the cooling device ().

Waste-heat utilization assembly of an internal combustion engine, and method for operating the waste-heat utilization assembly

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Rutesheim, Germany

Derya Lindenmeier