Scania CV AB

A method (100) of identifying malfunctioning of a compression release arrangement (7) of an internal combustion engine (1) is disclosed, wherein the engine (1) comprises a plurality of cylinders (c1-c4), the compression release arrangement (7), and an inlet manifold (14) arranged to supply air or an air/fuel mixture to each of the plurality of cylinders (c1-c4). The method (100) comprises, when the compression release arrangement (7) is in an activated state, obtaining (110) data representative of pressure peaks (pp) in the inlet manifold (14) and the crank angle/angles (CA) of the crankshaft (16) of the engine (1) at which the pressure peaks (pp) occur, and identifying (120) a number of cylinders (c1) of the plurality of cylinders (c1-c4) associated with a malfunctioning of the compression release arrangement (7) based on the obtained data. The present disclosure further relates to a computer program, a computer-readable medium (200), a control arrangement (21), an internal combustion engine (1), and a vehicle (2).

A method (100) of controlling operation of an internal combustion engine (1) is disclosed, wherein the engine (1) comprises a number of cylinders (3), an inlet manifold (14), at least one inlet valve (18) arranged in each cylinder (3), and an inlet valve phase shifting arrangement (32). The method (100) comprises obtaining (110) a gas pressure estimate representative of the pressure in the inlet manifold (14), obtaining (120) a cylinder pressure estimate, and in response to a set of conditions being met, phase shifting (130) the timing control of the at least one inlet valve (18), by controlling the inlet valve phase shifting arrangement (32), to reduce the magnitude of the difference between the cylinder pressure estimate and the gas pressure estimate at an opening event (61) of the at least one inlet valve (18). The present disclosure further relates to a computer program, a computer-readable medium (200), a control arrangement (21), an internal combustion engine (1), and a vehicle (2).

A method for a combustion engine (200) of a vehicle is presented. The combustion engine comprises: - a first group (225a) of two or more cylinders (220a-d) connected to a first exhaust gas manifold (240a) comprising a first pressure sensor (241a); and - a second group (225b) of two or more cylinders connected to a second exhaust gas manifold (240b) comprising a second pressure sensor (241b). The method performed during normal operation of the combustion engine comprises: - inducing at least one fuel cutoff for at least one (220a) of the four or more cylinders (220a-h); - measuring at least one first and at least one second misfire pressure responses by utilization of the first and second pressure sensors, respectively; - determining at least one misfire template for the combustion engine individual based on the at least one first and the at least one second misfire pressure responses.

A system (1) designed to assist individual vehicles (20, 21, 22, 23), and/or fleet management systems (30), in predicting future energy consumption of an individual vehicle (20, 21, 22, 23) is described. The system (1) is configured to collect data from a plurality of vehicles (20, 21, 22, 23), said data comprising geographic position, date and time of stops (S, S1, S2, S3, S4, S5), and vehicle load change (ΔVL) at the respective stops (S, S1, S2, S3, S4, S5). The system (1) is further configured to process the collected data. Moreover, the system (1) is configured to, based on the processed data, predict change in vehicle load (ΔVL) for an individual vehicle (20, 21, 22, 23) at one or more predefined upcoming stops (S, S1, S2, S3, S4, S5) of said individual vehicle (20, 21, 22, 23). The system (1) is also configured to communicate the predicted change in vehicle load at the one or more predefined upcoming stops (S, S1, S2, S3, S4, S5) to the individual vehicle (20, 21, 22, 23) and/or a fleet management system (30) associated with said individual vehicle. The disclosure further relates to a method, performed by the system (1), for assisting an individual vehicle (20, 21, 22, 23) or fleet management system (30) associated with the individual vehicle.

A control arrangement (100) and a method for controlling a vehicle (1) in conjunction with usage of a power take-off (11, 12) of the vehicle (1). The vehicle (1) comprises a powertrain (2) configured to power the power take-off (11, 12), and an energy storage device (10) configured to power the powertrain (2). The method comprises determining (S102) a first state of charge threshold for the energy storage device (10) based on map data, said first state of charge threshold corresponding to a minimum state of charge sufficient for the vehicle (1) to reach a e.g., a predefined charging station or a nearest charging station. Optionally, the method further comprises determining (S103) a second state of charge threshold based on the first state of charge threshold. The method may further comprise activating (S105) a limitation of allowable power supply to the power take-off (11, 12) when a state of charge of the energy storage device (10) reaches the optional second state of charge threshold, and/or interrupting (S107) power supply to the power take-off (11, 12) when the state of charge of the energy storage device (10) reaches the first state of charge threshold.

A vehicle system (10) is disclosed comprising a first memory section (m1) storing tamper-proof data, a second memory section (m2) storing updateable data, a control system (20) configured to perform various functions of a host vehicle (2) based on the updateable data stored in the second memory section (m2) when the control system (20) is operating in a default mode, an input unit (5) incorporated into the host vehicle (2), and a control arrangement (21). The control arrangement (21) is configured to set the control system (20) in a secure mode in response to a manual manipulation of the input unit (5), wherein the secure mode constitutes a mode in which the control system (20) is blocked from using the updateable data stored in the second memory section (m2). The present disclosure further relates to a method (100) of setting a control system (20) of a vehicle (2) in a secure mode, a computer program, a computer-readable medium (200), a control arrangement (21), and a vehicle (2).

A coolant system (1) for a vehicle (2) is disclosed. The coolant system (1) comprises a coolant circuit (c2) configured to regulate the temperature of an arrangement (11) of the vehicle (2), a deaeration conduit (3), and a valve element (5) controllable between a closed state, in which the valve element (5) blocks the transfer of fluid through the deaeration conduit (3), and an open state, in which the valve element (5) allows the transfer of fluid through the deaeration conduit (3). The deaeration conduit (3) comprises a first end (3') connected to the coolant circuit (c2) at a local height maximum of the coolant circuit (c2) with respect to the vertical direction (vd') of the coolant system (1), and a second end (3") arranged below the first end (3') with respect to a vertical direction (vd') of the coolant system (1). The present disclosure further relates to a vehicle (2) comprising a coolant system (1).

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Zusammenfassung wird geladen …