Abstract: A cooling system for cooling of a fuel cell assembly, includes a cooling loop for recirculation of a cooling medium, a cooling medium flow line comprising a first cooling medium buffer tank, a first heat exchanger for cooling of the cooling medium, and a second cooling medium buffer tank. The first cooling medium buffer tank is arranged upstream the first heat exchanger so as to allow collection, storing and discharge of cooling medium before it reaches the first heat exchanger. The second cooling medium buffer tank is arranged downstream of the first heat exchanger so as to allow collection, storing and discharge of cooling medium that has passed through and been cooled in the first heat exchanger.

Abstract: A computer-implemented method estimates a state of health of a humidifier of a fuel cell system for a vehicle. The method includes in response to determining that a predefined condition for vehicle onboard measurements is fulfilled: performing step response measurements, comprising measuring parameters related to dynamic response of water mass transport and heat transport of the humidifier when step increases of the fuel cell system are performed, wherein a step increase is indicative of an instantaneous power increase of the fuel cell system, and fitting the measured parameters in a humidifier aging model and therefrom estimating the state of health of the humidifier.

Abstract: A computer-implemented method determines a degradation state of a turbo and/or a humidifier of a fuel cell system for a vehicle. The fuel cell system includes a fuel cell stack, the turbo and the humidifier. The method includes obtaining a fuel cell system efficiency value which corresponds to a measured efficiency decrease of the fuel cell system during use with respect to a first reference efficiency, obtaining a fuel cell stack efficiency value which corresponds to a measured efficiency decrease of the fuel cell stack during use with respect to a second reference efficiency, and determining the degradation state of the turbo and/or the humidifier based on a difference between the fuel cell system efficiency value and the fuel cell stack efficiency value.

Abstract: A gasket arrangement comprises a sealing part for sealing between two heat transfer plates, which each comprises a number >1 of port holes. An attachment part is arranged to attach the gasket arrangement to one of the heat transfer plates. The sealing part comprises an annular outer sealing portion arranged to extend along at least a part of a respective outer edge of the heat transfer plates and enclose the portholes, and an annular inner sealing portion enclosed by the outer sealing portion and arranged to enclose at least one of the port holes. The attachment part is enclosed by the outer sealing portion, is arranged on an outside of the inner sealing portion and comprises a fastening attachment portion arranged to be fastened to a first side of the one of the heat transfer plates by an adhesive mechanism.

Abstract: A computer implemented method for controlling energy or power utilization of a battery pack in a rechargeable energy storage system is described. The battery pack is configured to be operated within an operating window defined by its state-of-charge, SOC, according to normal predetermined SOC limits, and extended predetermined SOC limits. The method includes determining a battery pack condition level; comparing the battery pack condition level with a first threshold; providing predicted energy or power utilization of the battery pack; comparing the predicted energy or power utilization with a second threshold. In response of determining that the predicted energy or power utilization is above the second threshold, and that the battery pack condition level is below the first threshold, operating the battery pack within the operating window defined by the extended predetermined SOC limits.

Abstract: A method for determining aging of a fuel cell system for a vehicle, comprising identifying a future interval in terms of time or distance during which the fuel cell system is expected to operate at stationary operating conditions, obtaining measurement values pertaining to at least one fuel cell parameter indicative of degradation of the fuel cell system during the identified interval, and determining an aging state of the fuel cell system using the measurement values.

Abstract: An internal combustion engine system, including an internal combustion engine (ICE), an exhaust aftertreatment system (EATS) located downstream of said ICE. An exhaust gas recirculation (EGR) pump arranged in an exhaust gas recirculation duct extending between the ICE and EATS, wherein the ICE system has a normal operation mode for transporting, by means of the EGR pump, at least a portion of said exhaust gas to upstream of the ICE. The ICE system further includes a heating device arranged upstream of at least one exhaust aftertreatment devices of said EATS and the ICE system has a pre-heat operation mode for transporting, by means of the EGR pump, exhaust gas and/or air through said heating device and then to said at least one of said exhaust aftertreatment devices.

Abstract: A cooling system in a fuel cell electric vehicle comprising a first chamber configured to contain relatively hot fluid and a second chamber configured to contain relatively cold fluid. The ratio of cooling power/fan power of a positive displacement device at a heat exchanger is monitored and thermal energy transfer between coolant and the chambers is controlled based on the ratio. When the ratio is above a pre-defined value or value range, thermal energy from the first chamber is provided to the coolant in the coolant circuit and passed into the heat exchanger, after which part of the thermal energy of cooled coolant leaving the heat exchanger is provided to and stored in the second chamber. The stored cold thermal energy is released from the second chamber when the ratio is below the pre-defined value or value range. The invention also relates to a method of controlling a cooling system.

Abstract: A heat transfer plate comprises a first end portion, a second end portion and a center portion arranged in succession along a longitudinal center axis of the plate. The center portion comprises a heat transfer area provided with a heat transfer pattern comprising support ridges and support valleys longitudinally extending parallel to the longitudinal center axis of the plate. The support ridges and support valleys are alternately arranged along a number of separated imaginary longitudinal straight lines extending parallel to the longitudinal center axis of the plate and along a number of separated imaginary transverse straight lines extending perpendicular to the longitudinal center axis of the plate. The heat transfer pattern further comprises turbulence ridges and turbulence valleys. At least a plurality of the turbulence ridges and turbulence valleys along at least a center portion of their longitudinal extension extend inclined relative to the transverse imaginary straight lines.

Abstract: A method is disclosed for cleaning a component of an exhaust aftertreatment system located downstream of a combustion engine in an exhaust flow path delimited by an outer wall. The exhaust aftertreatment system includes a first device releasably mounted in the outer wall upstream of the component and a second device releasably mounted in the outer wall downstream of the component, each of the devices being a sensor or an injector. The method includes sealing the exhaust flow path upstream of the first device and downstream of the second device, removing at least the first and second devices, thereby providing at least two openings in the outer wall, so that a cleaning flow path is provided, and introducing cleaning fluid into at least one of the openings, so that the cleaning fluid flows across the component via the cleaning flow path.

Abstract: An internal combustion engine system, including an internal combustion engine (ICE), an exhaust aftertreatment system (EATS) located downstream of said ICE. An exhaust gas recirculation (EGR) pump arranged in an exhaust gas recirculation duct extending between the ICE and EATS, wherein the ICE system has a normal operation mode for transporting, by means of the EGR pump, at least a portion of said exhaust gas to upstream of the ICE. The ICE system further includes a heating device arranged upstream of at least one exhaust aftertreatment devices of said EATS and the ICE system has a pre-heat operation mode for transporting, by means of the EGR pump, exhaust gas and/or air through said heating device and then to said at least one of said exhaust aftertreatment devices.

Abstract: The invention relates to a method for controlling the temperature of an NOx controlling component in an exhaust after treatment system of an internal combustion engine. The NOx controlling component has inner surface portions defining an interior component space through which exhaust gases are arranged to flow in order to be NOx controlled, and has outer surface portions facing away from the interior component space. The method comprises the step of: controlling the temperature of at least a portion of the NOx controlling component by a heat transfer medium arranged outside of the outer surface portions. The invention also relates to an exhaust after treatment system and a vehicle with such a system.

Abstract: A method is disclosed for cleaning a component of an exhaust aftertreatment system located downstream of a combustion engine in an exhaust flow path delimited by an outer wall. The exhaust aftertreatment system includes a first device releasably mounted in the outer wall upstream of the component and a second device releasably mounted in the outer wall downstream of the component, each of the devices being a sensor or an injector. The method includes sealing the exhaust flow path upstream of the first device and downstream of the second device, removing at least the first and second devices, thereby providing at least two openings in the outer wall, so that a cleaning flow path is provided, and introducing cleaning fluid into at least one of the openings, so that the cleaning fluid flows across the component via the cleaning flow path.

Abstract: A heat transfer plate comprises at least one first port hole area and opposing front and back sides, first and second planes defining the extension of the plate. Each first port hole area comprises a first port hole defined by an annular first inner edge of the plate, with the first inner edge consisting of first and second sections. Each first port hole area further comprises an annular first inner port portion extending along the first and second sections. The first inner port portion comprises, as seen from the front side of the plate, a number ?1 of first support projections along the second section of the first inner edge, each first support projections comprising a first top portion extending in the first plane. The plate extends, within the first inner port portion and outside first support projections, at a distance ?0 from the first and second planes.

Abstract: A heat transfer plate comprises a first end portion, a second end portion and a center portion arranged in succession along a longitudinal center axis of the plate. The center portion comprises a heat transfer area provided with a heat transfer pattern comprising support ridges and support valleys longitudinally extending parallel to the longitudinal center axis of the plate. The support ridges and support valleys are alternately arranged along a number of separated imaginary longitudinal straight lines extending parallel to the longitudinal center axis of the plate and along a number of separated imaginary transverse straight lines extending perpendicular to the longitudinal center axis of the plate. The heat transfer pattern further comprises turbulence ridges and turbulence valleys. At least a plurality of the turbulence ridges and turbulence valleys along at least a center portion of their longitudinal extension extend inclined relative to the transverse imaginary straight lines.

Abstract: A heat transfer plate comprises at least one first port hole area and opposing front and back sides, first and second planes defining the extension of the plate. Each first port hole area comprises a first port hole defined by an annular first inner edge of the plate, with the first inner edge consisting of first and second sections. Each first port hole area further comprises an annular first inner port portion extending along the first and second sections. The first inner port portion comprises, as seen from the front side of the plate, a number ?1 of first support projections along the second section of the first inner edge, each first support projections comprising a first top portion extending in the first plane. The plate extends, within the first inner port portion and outside first support projections, at a distance ?0 from the first and second planes.

Abstract: The invention relates to a method for controlling the temperature of an NOx controlling component in an exhaust after treatment system of an internal combustion engine. The NOx controlling component has inner surface portions defining an interior component space through which exhaust gases are arranged to flow in order to be NOx controlled, and has outer surface portions facing away from the interior component space. The method comprises the step of: controlling the temperature of at least a portion of the NOx controlling component by a heat transfer medium arranged outside of the outer surface portions. The invention also relates to an exhaust after treatment system and a vehicle with such a system.

Abstract: The invention provides an exhaust gas treatment system (8) arranged to receive exhaust gases from an internal combustion engine (6), the system comprising an exhaust conduit (10) and a selective catalytic reduction (SCR) catalyst (12) provided in the exhaust conduit (10), characterized in that the system comprises a nitrogen dioxide reducing unit (701) provided in the exhaust conduit (10) upstream of the SCR catalyst (12), wherein the nitrogen dioxide reducing unit (701) is adapted to reduce, at a low temperature, nitrogen dioxide (NO2) in exhaust gases received by the nitrogen dioxide reducing unit (701).

Abstract: A heat transfer plate and a plate heat exchanger are provided. The heat transfer plate includes an edge portion extending along an edge of the heat transfer plate and being corrugated so as to include alternately arranged ridges and valleys as seen from a first side of the heat transfer plate. The ridges and valleys extend perpendicularly to the edge of the heat transfer plate, a first one of the ridges having a top portion extending in a top portion plane, and a first one of the valleys, which is adjacent to the first ridge, having a bottom portion extending in a bottom portion plane. The top portion of the first ridge and the bottom portion of the first valley are connected by a main flank and end, just like the main flank, at an end distance from the edge of the heat transfer plate.

Abstract: A system is provided for determining a parameter indicative of an amount of a reducing agent in a selective catalytic reduction (SCR) module of a vehicle, the system including: the SCR module having at least one passage for transporting a stream of gas and an SCR catalyst for converting NOx emissions, and having an extension in an axial direction, at least one first antenna unit configured to transmit and receive a microwave signal. Moreover, the first antenna unit is arranged outside the SCR module and configured to transmit microwave signals towards the SCR catalyst and to receive a microwave signal reflected within the SCR module.