Volvo Trucks Patente

This brake circuit (100) for a road vehicle (10) comprises rear wheels (18), which are associated to parking brake actuators (102) controlled by a parking relay valve (104), and front wheels (16), which are each associated front brake actuators (112) controlled by a regulation device (114). The brake circuit includes a standstill control unit (120), which comprises a first input port (122A), configured to receive a first control signal (S122) representative of a state, active or inactive, of the parking relay valve (104), at least one additional input port (123) configured to receive an additional control signal (S123) representative of a state of the vehicle, including whether the engine (19) is running, and a first output port (122B), which is connected to the regulation device. The standstill control unit is configured to generate a control signal (S115) for controlling the regulation device, so that, in turn, the regulation device delivers a positive pressure to the front brake actuators, depending on whether the parking relay valve is in the inactive state, and whether the engine is running.

The disclosed technology concerns a method to shut down an internal combustion engine further to a shutdown signal, said internal combustion engine comprising at least one exhaust valve configured to evacuate exhaust gas from the combustion and a compression brake device configured to open said exhaust valve when activated, and an oil circuit fluidically connected to the exhaust valve to provide oil at a predefined oil pressure, said method comprising the steps of, after receiving (100) the shutdown signal by the control unit: - if the oil pressure (Poil) is greater than or equal to a pressure threshold (Pth), activating the compression brake device (110) during the compression stroke, - if the oil pressure is lower than the pressure threshold, increasing (120) the oil pressure to the pressure threshold and activating the compression brake device during the compression stroke once the oil pressure has reached the pressure threshold.

A combined induction-type electrical machine and braking arrangement (19) for use in a heavy vehicle (3), comprising a stator (23) coupled to a body (7) of the vehicle (3), the stator comprising stator windings; a rotor (25) coupled to at least one wheel (9) of the vehicle (3), the rotor comprising rotor conductors (31a-c; 41a-c); a current sensing arrangement (30) configured to sense induced current in at least one rotor conductor; a configuration switching arrangement (33) coupled to the current sensing arrangement (30) and the rotor conductors, and configured to switch from a first configuration, where the induced current experiences a first total resistance, to a second configuration, where it experiences a higher second total resistance, in response to a predefined first signal (49) from the current sensing arrangement (30); and a controller (29) configured to control the stator current to cause the induced current to result in the first signal.

A system (10), comprising: a busbar (12) comprising an opening (22); an electrical connector header (14) comprising a mounting hole (26) with an internal thread (28) oriented in a first thread direction; a fastening bolt (16) comprising an external thread (30) oriented in a second thread direction opposite the first thread direction; and a tubular adapter (18) comprising an external thread (42) configured to mate with the internal thread of said mounting hole when the tubular adapter is screwed in said mounting hole, an internal thread (46) adapted to mate with the external thread of the fastening bolt when the fastening bolt is screwed into the tubular adapter by turning the fastening bolt in a turning direction (48), and at least one internal structure (50) located at a predefined longitudinal position (44) in the tubular adapter and configured to impede rotation of the fastening bolt in relation to the tubular adapter, such that the tubular adapter rotates and moves in a longitudinal direction (56) away from the electrical connector header and establishes a physical contact between a contact surface (38) of the tubular adapter and the busbar when the fastening bolt is turned in said turning direction and rotation of the fastening bolt in relation to the tubular adapter is impeded by said at least one internal structure.

The disclosed technology concerns a method for providing a liquid solution from a liquid solution tank at a target pressure to an injector fluidically connected to a pump via a supply line, the pump being fluidically connected to the liquid solution tank, comprising the steps of:- Running (110) the pump at a first predefined speed;- After a first duration, measuring (120) the pressure of the liquid solution in the supply line;- If the measured pressure is lower than a threshold pressure lower than the target pressure, running (140) the pump at a second predefined speed lower than the first predefined speed;- If the measured pressure is greater than or equal to the threshold pressure, measuring (150) the pressure of the liquid solution in the supply line after a second duration;- If the measured pressure after the second duration is lower than the target pressure, stop (170) running the pump.

An electrical connector for electrically connecting a first and a second conductor element, the connector comprising a bolt having a threaded outer portion arranged for insertion through an opening in the first conductor element; an adapter having an elongated body extending along an axial direction between a first and a second end portion and arranged for insertion into a cylindrical opening of the second conductor element, the cylindrical opening forming an inner contacting surface. The adaptor comprises, an engagement portion having a through hole with an internal thread for engaging with the threaded portion of the bolt, and an expandable portion having a cylindrical outer contacting surface and arranged to expand outward radially as the bolt is rotated relative to the adaptor so the cylindrical outer contacting surface is pressed against the inner contacting surface for electrical connection and to secure the relative position in the axial direction.

The disclosed technology concerns an EGR circuit (10) of an internal combustion engine (11) comprising an inlet (12) and exhaust (13) manifold for collecting exhaust gas, said EGR circuit being configured to evolve between a flowing configuration, in which exhaust gas is allowed to flow through it, and a closed configuration, in which the exhaust gas flow through it is prevented, and comprising:- An EGR mixer (20) fluidically connected to the inlet manifold, and configured to mix exhaust gas and air,- An EGR cooler (30),- An exhaust pipe (31) fluidically connecting the exhaust manifold (13) to the EGR cooler,- An intermediate pipe (32) fluidically connecting the EGR cooler to the EGR mixer,- A first EGR valve (33) mounted in the exhaust pipe, to adjust and/or prevent the exhaust gas flow.

An engine system (10) and an exhaust aftertreatment system (20) arranged in an exhaust flow path (26) of a hydrogen combustion engine (15), comprising: a selective catalytic reduction device (40) configured to reduce nitrogen oxides; a hydrogen and ammonia slip catalyst device (50) arranged downstream of the SCR device (40) in the exhaust flow path (26), the HASC device (50) comprising an oxidation catalyst coating (52) and a metal-zeolite coating (53), a loading of the metal-zeolite coating (53) decreasing along a direction of flow (D); and a particulate filter (60) arranged downstream of the HASC device. In response to determining that the temperature of the HASC device is below a threshold, the engine system (10) is operated with a relatively high percentage of water in the engine out exhaust gases, whereby water is adsorbed on the metal-zeolite coating and a quick temperature rise is achieved.

A structural element (7) for an energy storage system battery housing (6) configured to house battery cell stack(s) (4), the structural element (7) having a longitudinal extension along a longitudinal direction (L), a width extension along a width direction (W) and a height extension along a height direction (H). The structural element comprises a venting channel (71) with an extension in the longitudinal direction, which venting channel forms a space configured for transport of cell ejecta from the battery cell stack(s); and at least a first supplemental channel (72) in the longitudinal direction, which supplemental channel(s) forms a space configured for containment of PCM. The supplemental channel(s) is separated from the venting channel with at least a first shared wall (73) configured to at least partly rupture when exposed to a temperature above a temperature threshold and/or a flow of matter at a velocity above a velocity threshold.

The invention relates to a butterfly EGR valve (20) for the regulation of the flow rate of a fluid flowing in a fluid passage (31) comprising a valve body (202) pivotable about a rotation axis (X), the valve body (202) having a first valve plate (203) and a second flexible valve plate (204) pivotally connected thereto, and urging means (205) keeping the second flexible valve plate (204) disposed at an angular distance from the first valve plate (203), the angle (α) between the plane defined by the second valve plate (204) and the plane defined by the first valve plate (203) being less than or equal to 180°, the valve body (202) being able to move at least in the successive positions: - a fully opened position, in which the fluid flows through the fluid passage (31) without being interrupted, - a partially closed position, in which the fluid flows through the fluid passage (31) through a reduced aperture defined by the first valve plate (203), - a fully closed position, in which the fluid cannot flow through the fluid passage (31).

A fuel injection system (45), for an internal combustion engine, the fuel injection system comprising a first fuel injector (50), connected to a high-pressure fuel source (53), a second fuel injector (55), connected to a low-pressure fuel source (57), an intake pre-chamber (60), receiving fuel injected by the fuel injectors, an intake nozzle (65), receiving fuel from the intake pre-chamber and injecting said fuel in a combustion chamber (20), a spark plug (70) positioned inside the pre-chamber and configured for igniting the fuel injected by the fuel injectors, and a controller, connected to the fuel injectors, for controlling a fuel injection by the first fuel injector into the intake pre-chamber and a fuel injection by the second fuel injector into the intake pre-chamber, as a function of a requested torque for the internal combustion engine and as a function of an availability of fuel at the fuel sources.

The present disclosure relates to a computer system (100) of a heavy-duty vehicle (1), comprising processing circuitry (10) configured to, during driving of the heavy-duty vehicle (1): read at least a roll rate value (p) and a yaw rate value (r) from an Inertial Measurement Unit, IMU, (20) mounted on a chassis of the heavy-duty vehicle (1); determine a roll sensitivity value (C<roll>) as C roll = p u r ˙ <img class="EMIRef" id="a2b41017-e097-4076-be06-d9de34a3773f-ia01" /> , wherein u is a longitudinal velocity value of the heavy-duty vehicle (1); and output the roll sensitivity value (C<roll>).

Method for generating, storing and processing quality indicating data for a product. The method comprises collecting operating quality indicating values from at least one component comprised in the product; generating a quality indicating data for each of the operating quality indicating values by normalizing each of the operating quality indicating values to an integer, wherein the quality indicating data indicating how close an operating quality indicating value is to a required quality threshold or how much the operating quality indicating value is above the required quality threshold; and storing the quality indicating data together with other operational data of the component collected for a session representing how the product is operating during a period.

An electrically excited synchronous machine (20) is provided, comprising: a stator (220) having a plurality of stator windings (222), a rotor (230) having a plurality of rotor windings (236), and a transformer (240) comprising a stationary primary winding (242) and a secondary winding (244) arranged on the rotor (230). The secondary winding (244) is configured to generate a field current (i_F) when excited by a control current (i_C) in the stationary primary winding (242). The electrically excited synchronous machine (20) further comprises: a sensor (250) in connection with the rotor windings (236) and configured to obtain sensor data (252) relating to the field current (i_F) applied to the rotor windings (236), and an optical data connection (260) configured to transmit field current data (254), said field current data (254) being based on the obtained sensor data (252).

A fluid control device (10) including a first connection element (20) extending axially between a first opening (26) and a second opening (28) along an axis (A-A), the first connection element defining a cavity (30) extending between the first opening and the second opening; an insert (50) configured to be received within the cavity (30) of the first connection element (20), the insert extending axially between an inlet (56) and an outlet (58) and defining a channel (62) extending between the inlet and the outlet, the insert being configured to be transitioned axially between a first position and a second position; and a second connection element (80) configured to connect with the first connection element (20) and to transition the insert (50) from the first position of the insert toward the second position of the insert when the second connection element is connected with the first connection element.

The present disclosure relates to a computer system (1000) for handling contactors in a vehicle system (200). The vehicle system (200) comprises a battery (201) electrically connected to a TVS (202) separated by a battery contactor (205a, 205b) and a HV load (203) electrically connected to the TVS (202) separated by a load contactor (208a, 208b). The computer system (1000) comprises processing circuitry (1002) configured to:- determine that charging has stopped,- determine to change the battery contactor (205a, 205b) from closed to open state,- determine that voltage at the TVS (202) is close to or equal to zero,- determine to change the load contactor (208a, 208b) from open to closed state,- determine that a result of an insulation monitoring indicates that a risk for insulation error is below a risk threshold,- determine to change the battery contactor (205a, 205b) from open to closed state.

The disclosure relates to a steering system (1) comprising two chambers (20, 22), a fluid circuit (12) in fluid communication with the chambers, a piston (24) separating the chambers, a guide element (30), a first transmission element (4) configured to transmit a rotational force to a rotary valve (10) able to take:a first/second, position, in which the fluid circuit is in communication with one chamber,a third position, in which the fluid circuit is isolated from the chambers,the piston sliding along the guide element in a direction depending on the position of the rotary valve, and configured to cooperate with a second transmission element (6), the steering system comprising a torsion device (36) configured to move the rotary valve and comprising :a torsion bar (38) fixed to the rotary valve and the guide element,a coupling mechanism (42) configured to limit a torsion of the torsion bar.

A method, comprising: receiving (S51), for each point in time of a series of consecutive points in time, a set of indications including an indication of an articulation angle (θ), an indication of a yaw rate (ω_z,tractor) of the tractor (3), and an indication of a longitudinal speed (v_x) of the tractor (3); estimating (S52), for each point in time of the series of consecutive points in time, an instantaneous turning radius (R_ir) of the trailer (5) based on the indication of the articulation angle (θ), the indication of the yaw rate (ω_z,tractor) of the tractor (3), and the indication of the longitudinal speed (v_x) of the tractor (3); curve-fitting (S53) a time series of estimated instantaneous turning radii (R_ir) of the trailer (5) to an arc (33) of a circle having a radius (R); and determining (S54) an indication of an instantaneous path curvature of the trailer (5) based on the radius (R) of the circle.

A control system and a method for controlling a hydrogen-fueled vehicle comprising a fuel storage container for storing hydrogen fuel to be supplied to a power system and a cooling system for cooling at least the fuel storage container. The method comprises obtaining an indication indicating that the fuel storage container is to be refilled with hydrogen fuel at a refueling station at a future time point, determine a predicted state of the container at the future time point, determine a target state of the container for refilling the fuel storage container with the hydrogen fuel, and, responsive to determining that the container will not reach the target state when the vehicle is operated under at least one current and/or predicted operating condition, instruct at least portions of the vehicle to operate at at least one modified operating condition such that the fuel storage container assumes the target state at or in advance of the future time point.

A computer system (31) comprising processing circuitry (33) configured to: receive an indication (35) of a predicted duration of a sailing period during which a vehicle (1) can carry out a mission without driving at least a first wheel (13a-b) and a second wheel (17a-b) of the vehicle (3) using a prime mover (7) of the vehicle (3); and provide, in response to the predicted duration of the sailing period being longer than a predefined threshold duration, a command (37) to disconnect, during at least a portion of the sailing period, the first wheel (13a-b) and the second wheel (17a-b) from each other, allowing the first wheel (13a-b) and the second wheel (17a-b) to rotate independently of each other.

A coolant inlet port (100) for an electrical energy storage pack enclosure (102), the coolant inlet port comprises: an opening (113) for receiving a coolant pipe (104), and a breather unit (108) arranged in the opening, the breather unit comprises a membrane (110) configured to be arranged at least partly around the coolant pipe in the opening, the membrane is gas permeable and liquid impermeable, and a cover structure (112, 212) arranged to at least partly cover the membrane and part of the coolant pipe at the opening to create a temporary gas trap around the membrane and the cooling pipe.

A combined induction-type electrical machine and braking arrangement (19) for use in a heavy vehicle (3) comprises a stator (23) configured to be coupled to a body (7) of the vehicle (3), the stator comprising stator windings; a rotor (25) configured to be coupled to at least one wheel (9) of the vehicle (3), the rotor (25) comprising rotor conductors (31a-c; 41a-c; 43a-c); a configuration switching arrangement (33) coupled to the rotor conductors (31a-c; 41a-c; 43a-c) of the rotor (25) and controllable to switch between a first configuration, in which induced current flowing through the rotor conductors (31a-c; 41a-c; 43a-c) experiences a first total resistance, and a second configuration, in which the induced current experiences a second total resistance, higher than the first total resistance; and a controller (29) configured to control the configuration switching arrangement (33) from the first configuration to the second configuration in response to a braking command.

A door actuating system (100) for operating a door (205) of a heavy vehicle (200), comprising a primary actuator (10) having a first end (11) coupled to a door of the vehicle and a second opposite end (12) coupled to a vehicle structure (210), wherein the primary actuator is configured to move between an extended state (P<ext>) and an compressed state (P<comp>) with a powered operation, and a secondary failsafe actuator (20) configured to move between an extended state (S<ext>) and a compressed state (S<comp>) with a manual operation, wherein the primary actuator and the secondary failsafe actuator are arranged in series between the door of the vehicle and the vehicle structure. Also, a method and a vehicle with such actuating system is disclosed.

An energy storage system (100) comprising: a housing (102) configured to accommodate at least one battery module (104); a mounting plate (106) including at least one battery disconnect unit (108a-b) configured to be connected to the at least one battery module; and a sliding mechanism (110a-b) configured to allow the mounting plate to slide into and out of the housing through a mounting opening (112) arranged to receive the mounting plate.

The present disclosure relates to a computer system (400) and a method for controlling a transmission (20) of a vehicle, wherein the transmission (20) comprises an output shaft (25) and a set of input shafts (21, 22) comprising at least a first input shaft (21), the transmission being adapted to assume a plurality of transmission configurations, each transmission configuration resulting in a predetermined gear ratio between each input shaft (21, 22) in the set of input shafts and the output shaft (25), and wherein the vehicle comprises a regenerative braking system (30) adapted to convert at least a portion of the vehicle's kinetic energy into electric energy to be fed to an energy storage system (34) of the vehicle during a braking event. The method comprises:- obtaining braking information indicating a required vehicle braking torque for a braking event;- in response to determining that the braking torque deliverable from the regenerative braking system (30) with a currently assumed transmission configuration equals or exceeds the required vehicle braking torque, determining that the currently assumed transmission configuration should be maintained during the braking event and preferably issuing information to the transmission (20) to maintain the currently assumed transmission configuration.

A computer system (19) comprising processing circuitry (21) configured to: receive an indication (23) that, for a vehicle (1) having, in order from front to rear, a first axle (3) with a first set (11) of wheels, a liftable second axle (5) with a second set (13) of wheels, a third drive axle (7) with a third set (15) of wheels, and a liftable fourth axle (9) with a fourth set (17) of wheels, the load (L) carried by the vehicle (1) is lower than a predefined first load (La) defining an unladen state; receive an indication (25) that braking capability using the first set (11) of wheels is reduced; acquire a stored predefined axle lift configuration (26) for maximum deceleration in the unladen state with reduced braking capability; and provide an axle lift command (27) encoding the predefined configuration in response to the received indications.

A fluid nozzle device (10) for directing fluid towards an underside of a piston (8) of an internal combustion engine (2), the fluid nozzle device comprising a nozzle tube (11) having an inlet (12) for receiving a fluid, a primary outlet (13) for directing fluid towards the piston, and a secondary outlet (14) for directing fluid towards the piston, wherein the fluid nozzle device comprises a fluid flow control device (20) configured to control the flow of fluid through the secondary outlet in response to a fluid pressure at the inlet.

Automatically generating on-demand wiring element optimized meshes for augmented reality (AR) devices is disclosed herein. In one example, a computer system comprises processing circuitry configured to obtain a structured file corresponding to a wiring element of a non-virtual device, wherein the structured file comprises wiring element metadata that comprises a first connector terminal descriptor, a second connector terminal descriptor, and a segment descriptor; the segment descriptor corresponds to a plurality of point descriptors; each point descriptor of the plurality of point descriptors comprises a location coordinate; and the structured file omits mesh geometry data for the wiring element. The processing circuitry further generates a three-dimensional (3D) mesh for the wiring element based on the structured file, receive visual imagery data of the non-virtual device, and display a rendering of the 3D mesh overlaid on the visual imagery data of the non-virtual device.

A battery housing (100) with integrated venting channels for distributing gas released during thermal runaway, the battery housing comprising: a first side venting channel (102) located on a first side (104) of the battery housing and configured to receive exhaust gas from a battery cell (106) in the event of thermal runaway; a busbar holder (108) connected to the battery housing, the busbar holder comprising a busbar venting channel (202, 302) integrated within the busbar holder; a first fluid connection (204) connecting the first side venting channel to a first opening (206, 306) of the busbar venting channel; a second fluid connection (208) connecting a second side venting channel (114) to a second opening (210, 310) of the busbar venting channel, allowing a gas flow from the first side venting channel, through the busbar holder venting channel and to the second side venting channel.

A battery housing (100) for an energy storage system in a vehicle (600), the battery housing comprising: a top structure (102) integrally formed with a load bearing platform (104) configured to support external mechanical loads, the top structure including venting channels (106) arranged within the top structure and in fluid communication with an internal volume of the battery housing, the venting channels being configured to guide exhaust gases generated during a thermal runaway event within the battery housing.

Provided is a computer system (100) for facilitating disengagement of a locking differential and/or transfer case (330a, 330b, 330c) of a vehicle or piece of heavy machinery. The computer system includes processing circuitry 110 configured to receive an indication (120) about a desire to disengage the locking differential and/or transfer case and, in response to receiving the indication, initiate a disengagement of the locking differential and/or transfer case and, to facilitate the disengagement, control a brake system (340) of the vehicle or piece of heavy machinery to reduce a torque difference on opposite sides of the locking differential and/or transfer case. A corresponding vehicle, method, computer program, computer program product and computer-readable storage medium are also provided.

A computer system (100; 400) for providing vehicle route recommendations, the system (100; 400) comprising processing circuitry (102; 402) configured to: receive a destination input request (10) indicating a desired destination (8) for the vehicle (1); determine route suggestions (20) from a current location (6) to the desired destination (8); employ a machine learning model (30) to perform an assessment for each route suggestion (20), each assessment comprising a separation of data into a plurality of transformation process modules (31, 33, 35); and provide route recommendations (40) based on outputs from the machine learning model (30), each route recommendation (40) comprising a cruise controller setting (42) and its expected influence on travelling time of the vehicle (1) in relation to its fuel consumption from the current location (6) to the desired destination (8).

A computer system (140, 160, 310, 500) for reducing rotational speed of at least one wheel (110) of a vehicle (100), the computer system (140, 160, 310, 500) comprising processing circuitry (150, 170, 315, 502) configured to: determine a first value of rotational kinetic energy (E₁) of one or more powertrain components (110, 120, 210, 220, 230, 240, 250, 260, 320) of the vehicle (100), when the at least one wheel (110) is rotating at a current rotational speed (ω₁); acquire a second value of rotational kinetic energy (E₂) of the one or more powertrain components (110, 120, 210, 220, 230, 240, 250, 260, 320), when the at least one wheel (110) is rotating at a rotational speed (ω₂) where the wheel (110) has a desired amount of slip; determine an energy difference (ΔE) between the first value of rotational kinetic energy (E₁) and the second value of rotational kinetic energy (E₂); determine a first retardation torque pulse corresponding to the determined energy difference (ΔE); and cause the determined first retardation torque pulse to be applied to at least one of the one or more powertrain components to reduce the rotational speed of the at least one wheel (110).

A system (300) comprising: a coupling (200) configured to connect to a first unit (120) of a vehicle combination (100) at a first end (240) and to a second unit (140) of the vehicle combination (100) at a second end (250), the coupling (200) comprising: a first strut (210) and a second strut (220) extending between the first and second ends (240, 250) of the coupling (200) and disposed at an angle (α) to each other, and a respective actuator (210c, 220c) provided on each of the first and second struts (210, 220), each actuator (210c, 220c) configured to adjust the length of the respective strut (210, 220); and processing circuitry (155, 175, 275, 602) configured to determine a control input for adjusting the length of at least one of the first and the second struts (210, 220) using the respective actuator (210c, 220c) to adjust a force (F) acting on the coupling (200).

A method of controlling operation of a semitrailer (10) coupled to a tractor (12) via a fifth wheel coupling (16a-b), the method comprising: obtaining (S 1) a relation between a coupling force (Fcx) in a yaw plane and a vertical coupling force (Fcz) in the semitrailer's part (16a) of the fifth wheel coupling; receiving (S2), from at least one axle load sensor (24a-c) included in the semitrailer (10), at least one axle load (Fz21, Fz22, Fz23) of the semitrailer; determining (S3), by processing circuitry (30), a propulsion force (Fx21) to propel the semitrailer with using at least one electrical machine (20) arranged to drive at least one axle (18a) of the semitrailer, wherein the propulsion force is determined based on the obtained relation and the received at least one axle load; determining (S4), by the processing circuitry, a torque based on the determined propulsion force; and providing control parameters (32) based on the determined torque to the at least one electrical machine.

Heat exchanger (30) arranged in a fuel cell system (20), comprising: an intake exhaust gas portion (32) connected to a fuel cell stack (27) of the fuel cell system (20) and adapted to receive exhaust gases generated by the fuel cell stack (27); an intake heated compressed air portion (38) connected to a compressor (23) of the fuel cell system (20) and adapted to receive heated compressed air generated by the compressor (23); and a control device (31) configured to: control a heat exchange between the received exhaust gases and the received heated compressed air based on respective temperatures, and cause recirculation of the exhaust gases to the fuel cell stack (27) based on the heat exchange control.

A method of controlling operation of a trailer (10) coupled to a towing vehicle (12), the method comprising: receiving (S1), from a wheel speed sensor (26) included in the trailer, a wheel speed (ws21) of the trailer; receiving (S2), from at least one axle load sensor (24a-c) included in the trailer, at least one axle load (Fz21, Fz22, Fz23) of the trailer; estimating (S3), by processing circuitry (30), an acceleration of the trailer based on the received wheel speed; calculating (S4), by the processing circuit, a mass based on the received at least one axle load; determining (S5), by the processing circuitry, a propulsion force (Fx21) to propel the trailer with using at least one electrical machine (20) arranged to drive at least one axle (18a) of the trailer, wherein the propulsion force is determined based on the estimated acceleration and the calculated mass; determining (S6), by the processing circuitry, a torque based on the determined propulsion force; and providing (S7) control parameters (32) based on the determined torque to the at least one electrical machine.

A computer system (270, 280, 400) and computer-implemented method (300) are disclosed for manoeuvring a dolly vehicle (200) comprising a pivoted front wheel (210), a left rear wheel (230), and a right rear wheel (240). The computer-implemented method (300) comprises: acquiring (302), by processing circuitry (275, 285, 402) of a computer system (270, 280, 400), a desired steering angle for the pivoted front wheel (210); determining (304), by the processing circuitry (275, 285, 402), a steering moment (Mst) to provide the desired steering angle at the pivoted front wheel (210); and determining (306), by the processing circuitry (275, 285, 402), a drive torque (Tel2, Tel3) for one or more of the left rear wheel (230) and the right rear wheel (240) to provide the determined steering moment (Mst). This provides improved manoeuvrability of the dolly vehicle.

An exhaust fluid drain reducer (110) for an exhaust system (100) arranged downstream a fuel cell system (20), wherein the exhaust fluid drain reducer (110) comprises: an exhaust fluid inlet (112) arranged in fluid communication with main exhaust piping (102) of the exhaust system (100), the main exhaust piping (102) fluidly connecting a fuel cell stack (27) of the fuel cell system (20) and a fluid exhaust chimney (130); an exhaust fluid outlet (114) arranged in fluid communication with a fluid discharge location; and an exhaust fluid conduit (116) fluidly connecting the exhaust fluid inlet (112) and the exhaust fluid outlet (114), wherein the exhaust fluid conduit (116) is constructed with an inner diameter smaller than that of the main exhaust piping (102).

The invention concerns an electric drive axle (12), comprising: - an electric machine (22) with a rotor shaft (28), and - a transmission (26) comprising : a. a primary reduction gearset (30) connected to the rotor shaft (28) and comprising a driving gear (34), and b. a planetary gear transmission (32) comprising : i. an outer planetary gearset (36) comprising an outer ring gear, an outer planet carrier and an outer sun gear, and ii. an inner planetary gearset (38) comprising an inner ring gear and an inner sun gear. The outer ring gear is connected to the driven gear (34) and defines the input of the planetary gear transmission (32). The inner planetary gearset (38) comprises an inner planet carrier defining the output of the planetary gear transmission (32).