METHOD FOR CONTROLLING A HEAT RECOVERY DEVICE IN AN INTERNAL COMBUSTION ENGINE

摘要

The invention relates to a method for controlling a heat recovery device (1) in an internal combustion engine (10), in particular of a motor vehicle, wherein the heat recovery device (1) comprises a circuit for a working medium, comprising an evaporator (2, 3) that is arranged in an exhaust gas flow path of the internal combustion engine (10), an expansion machine (4), a condenser (5), a compensating reservoir (6), and a feed pump (7), wherein the working temperature of the working medium is controlled by varying the mass flow of the working fluid depending on at least one operating parameter, wherein a target value (m'MAsoll, m'MAGRsoll) of the working medium mass flow of an exhaust gas flow path of an exhaust gas tract and/or of an exhaust gas recirculation line is calculated on the basis of a base target value (m'MbAsoll, m'MbAGRsoll) for the working medium mass flow, wherein the base target value (m'MbAsoll, m'MbAGRsoll) for the working medium mass flow is at least a function of the exhaust gas temperature (TA1, TAGR1), preferably upstream of the evaporator (2, 3), and of the exhaust gas mass flow (m'A, m 'AGR ) in the exhaust gas flow path. In order to implement controlled heat recovery, at least one corrective value is added to the base target value (m'MbAsoll, m'MbAGRsoll) of the working medium mass flow.