A cooling device for a vehicle is provided, which includes an engine having an exhaust gas recirculation (EGR) system, a supercharger, and an intercooler configured to cool intake gas containing EGR gas. The device includes a coolant channel through which coolant for cooling a motor drive flows, the coolant channel having a first channel through which a first coolant for cooling a high-voltage component of the motor drive flows and a second channel through which a second coolant for cooling the intercooler flows, the second channel being branched from the first channel. The device includes a valve provided to the second channel of the coolant channel and configured to adjust a flow rate of the second coolant.

The invention relates to a method for operating an internal combustion engine system (2), wherein the internal combustion engine system (2) is provided with an air intake duct (3), an exhaust gas duct (4) and an exhaust gas recirculation (EGR) system (5), wherein the EGR system (5) comprises an EGR conduit (6) that fluidly connects the exhaust duct (4) and the intake duct (3), and wherein a gas feeding device (7) configured to feed exhaust gas from the exhaust duct (4) to the intake duct (3) is arranged in the EGR conduit (6). The method is characterized in that it comprises the step of: detecting an indication of accumulated deposits of soot, hydrocarbons or other contaminants in the gas feeding device (7) by determining whether a rotational friction of a rotary member (71, 72) of the gas feeding device (7) exceeds a threshold value. The invention also relates to an internal combustion engine system (2) configured for being operated by such a method and to a vehicle (1) provided with such an engine system (2). The invention further relates to means for controlling the above method.

The invention relates to a method for operating an internal combustion engine system (2), wherein the internal combustion engine system (2) is provided with an air intake duct (3), an exhaust gas duct (4) and an exhaust gas recirculation (EGR) system (5), wherein the EGR system (5) comprises an EGR conduit (6) that fluidly connects the exhaust duct (4) and the intake duct (3), and wherein a gas feeding device (7) configured to feed exhaust gas from the exhaust duct (4) to the intake duct (3) is arranged in the EGR conduit (6). The method is characterized in that it comprises the step of: detecting an indication of accumulated deposits of soot, hydrocarbons or other contaminants in the gas feeding device (7) by determining whether a rotational friction of a rotary member (71, 72) of the gas feeding device (7) exceeds a threshold value. The invention also relates to an internal combustion engine system (2) configured for being operated by such a method and to a vehicle (1) provided with such an engine system (2). The invention further relates to means for controlling the above method.

The invention relates to a method for controlling an internal combustion engine system (2), wherein the internal combustion engine system (2) is provided with an air intake duct (3), an exhaust gas duct (4) and an exhaust gas recirculation (EGR) system (5), wherein the EGR system (5) comprises an EGR conduit (6) that fluidly connects the exhaust duct (4) and the intake duct (3), and wherein a gas feeding device (7) is arranged in the EGR conduit (6), said gas feeding device (7) being configured to feed exhaust gas from the exhaust duct (4) to the intake duct (3) during operation of the engine system (2). The method is characterized in that it comprises the step of: detecting a risk of freezing of condensed water in the EGR conduit (6), and, in case such a risk is detected and in case the gas feeding device (7) is not in operation, operating the gas feeding device (7). The invention also relates to an internal combustion engine system (2) configured for being operated by such a method and to a vehicle (1) provided with such an engine system (2). The invention further relates to means for controlling the above method.

The invention relates to a method for controlling an internal combustion engine system (2), wherein the internal combustion engine system (2) is provided with an air intake duct (3), an exhaust gas duct (4) and an exhaust gas recirculation (EGR) system (5), wherein the EGR system (5) comprises an EGR conduit (6) that fluidly connects the exhaust duct (4) and the intake duct (3), and wherein a gas feeding device (7) is arranged in the EGR conduit (6), said gas feeding device (7) being configured to feed exhaust gas from the exhaust duct (4) to the intake duct (3) during operation of the engine system (2). The method is characterized in that it comprises the step of: detecting a risk of freezing of condensed water in the EGR conduit (6), and, in case such a risk is detected and in case the gas feeding device (7) is not in operation, operating the gas feeding device (7). The invention also relates to an internal combustion engine system (2) configured for being operated by such a method and to a vehicle (1) provided with such an engine system (2). The invention further relates to means for controlling the above method.

Turbocharged engine water vapor ingestion control techniques determine a dew point of a charge air cooler (CAC) in an induction system of the engine based on measured humidity and temperature of a mixture of (i) air drawn into the induction system and (ii) exhaust gas produced by the engine that is cooled and recirculated by a low pressure cooled exhaust gas recirculation (LPCEGR) system of the engine back into the induction system. When the mixture temperature is less than the CAC dew point, a condensate accumulation in the CAC is determined. When the CAC condensate accumulation does not satisfy a set of one or more thresholds, the mixture temperature is increased. When the CAC condensate accumulation satisfies the set of one or more thresholds, an amount of the exhaust gas that is cooled and recirculated by the LPCEGR system is decreased until the mixture temperature meets the CAC dew point.

Methods and systems are provided for a cooling arrangement of an engine. In one example, a method comprises flowing coolant from a high temperature coolant circuit or a low temperature coolant circuit to a fresh air heat exchanger in response to a condensate likelihood.

Methods and systems are provided for a cooling arrangement of an engine. In one example, a method comprises flowing coolant from a high temperature coolant circuit or a low temperature coolant circuit to a fresh air heat exchanger in response to a condensate likelihood.

A control apparatus of an internal combustion engine controls a heat exchange cooling water flow rate which is a flow rate of cooling water supplied to an exhaust heat recovery cooler apparatus, to a larger flow rate when the control apparatus executes an EGR control, and the exhaust heat recovery cooler apparatus performs an exhaust heat recovery function, than when the control apparatus executes the EGR control, and the exhaust heat recovery cooler apparatus does not perform the exhaust heat recovery function.

A control apparatus of an internal combustion engine controls a heat exchange cooling water flow rate which is a flow rate of cooling water supplied to an exhaust heat recovery cooler apparatus, to a larger flow rate when the control apparatus executes an EGR control, and the exhaust heat recovery cooler apparatus performs an exhaust heat recovery function, than when the control apparatus executes the EGR control, and the exhaust heat recovery cooler apparatus does not perform the exhaust heat recovery function.