Control circuit for waste heat recovery systems

US11448099B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Herwig KOPPAUER · Linz, AT
• Andreas Kugi · Wien, AT
• Wolfgang Kemmetmueller · Wien, AT
• Christian Fleck · Gerlingen, DE
• Matthias Bitzer · Stuttgart, DE
• Adrian Trachte · Stuttgart, DE
• Carolina Passenberg · Rutesheim, DE
• Derya Lindenmeier · Rutesheim, DE
• Thomas Specker · Shanghai, CN

Key dates

• Filing date: Feb 26, 2019
• Grant date: Sep 20, 2022
• Expiry date: Jul 18, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a control circuit (27) for a waste heat recovery system (2) for a heat engine (36). The waste heat recovery system (2) comprises at least one evaporator (21) for converting waste heat from the exhaust gas (31, 31a) generated by the heat engine (36) into a working medium (23), at least one expansion machine (24) which can be driven by the working medium (23), at least one condenser (25) for condensing the working medium (23a) expanded in the expansion machine (24) into the liquid state (23b), and at least one conveying device (26) for increasing the pressure of the condensed working medium (23b) and conveying same into the evaporator (21). The control circuit (27) influences at least one control variable which controls the energy transmission from the exhaust gas (31, 31a) to the working medium (23b) and/or the energy transmission from the working medium (23c) to the expansion machine (24). The control circuit (27) is designed to regulate the specific enthalpy hW and/or the temperature TW of the working medium (23c) entering the expansion machine (24) to a target value hW,S, TW,S, wherein the target value hW,S, TW,S depends on the pressure pW of the working …