A thermostat device (8) for a cooling system in a vehicle. The device (8) includes a thermostat housing (15) enclosing a movably arranged valve body (16, 20, 34, 44). The valve body is configured to distribute coolant from a thermostat chamber (15a) to a radiator bypass line (9) and/or a radiator (11) in dependence on the position of the valve body. The device (8) has a first thermal expansion element (31) providing a first stroke of a valve body (16, 20, 34, 44) in response to the temperature of the coolant in a the pilot chamber (14a), and a second thermal expansion element (32) providing a second stroke of the valve body (16, 20, 34, 44) in response to the temperature of the coolant in the thermostat chamber (15a) such that the valve body (16, 20, 34, 44) is moved to a position defined by the strokes from the thermal expansion elements (31, 32). The pilot chamber (14a) has an outlet passage (14b) for directing coolant from the pilot chamber (14a) to the thermostat chamber (15a).

A combined cooling and water braking system for a vehicle comprises a first water recirculation loop having a first heat exchanger configured to cool water flowing in the first water recirculation loop, the first water recirculation loop comprising a water conduit for transporting heat away from a propulsion device configured to generate a propulsion power for the vehicle. A second water recirculation loop having a second heat exchanger is configured to cool water flowing in the second water recirculation loop. A retarder is configured to be coupled to a pair of wheels of the vehicle. The second water recirculation loop may be selectively used for cooling the propulsion device and for providing water to the retarder for water braking. There is also provided a method for cooling a propulsion device of a vehicle and water braking a pair of wheels of a vehicle.

A passive diverter fitting for a cooling system of an engine includes a base defining an interior cavity, an inlet opening extending through the base that is in fluid communication with the interior cavity, an outlet opening that is in fluid communication with the interior cavity, and a bypass opening that is in fluid communication with the interior cavity. The base is configured to be removably disposed in a cavity of an engine block. The inlet opening is positioned to receive coolant when the passive diverter fitting is disposed in the cavity of the engine block. The outlet opening is in fluid communication with the area exterior to the engine block when the passive diverter fitting is disposed in the cavity of the engine block. The bypass opening is in fluid communication with an interior coolant passage of the engine block when the passive diverter fitting is disposed in the cavity of the engine block.

A method for filling a hydraulic system with a hydraulic fluid includes sealing the hydraulic system in a pressure-tight manner and recording a pressure in the sealed hydraulic system, filling or removing a predefined volume of the hydraulic fluid from the sealed hydraulic system, recording a pressure in the sealed hydraulic system after the filling or removing, calculating a volume of a total residual air in the hydraulic system depending on the pressures before and after the filling or removal of the predefined volume, calculating a final correction volume depending on the volume and a design-specified air feed of the hydraulic system, and refilling or removing the calculated final correction volume to achieve a final correct filling quantity for the hydraulic system.

A vehicle thermal management system is disclosed comprising a first and a second coolant circuit each comprising a coolant pump. The first coolant circuit comprises a coolant duct configured to conduct coolant flow through a portion of the first coolant circuit, and an expansion tank connected to the coolant duct. The system further comprises a first connecting conduit connecting the second coolant circuit to the coolant duct, and valve controllable between a first state in which the valve hinders flow of fluid through the first connecting conduit, and a second state in which the valve allows flow of fluid through the first connecting conduit. The present disclosure further relates to a vehicle comprising a vehicle thermal management system.

A hydraulic cylinder retarder includes a hydraulic cylinder mechanism, a hydraulic oil conveying mechanism and a hydraulic oil valve mechanism. A piston component of the hydraulic cylinder mechanism is connected to a transmission device. Resistance to the piston movement of the hydraulic cylinder mechanism is generated by the hydraulic oil conveying mechanism and the hydraulic oil valve mechanism, so as to reduce the operation speed of the transmission device.

The invention relates to the cooling system of an internal combustion engine (10) which comprises a combustion engine (12) having at least two cylinder banks (14, 16) and a number of exhaust gas exchangers (18, 20) identical to the number of cylinder banks, as well as a retarder connection, wherein the cooling system can be flown through by a fluid serving as coolant in a preferred flow direction and comprises a cooling system trunk section (30) and a number of cooling system branch sections identical to the number of the cylinder banks (14, 16) of the combustion engine (12), said cooling system branch sections comprising each a cylinder bank branch section (22, 24), an exhaust gas exchanger branch section (36, 38) and a combining branch section (44, 46). The invention further relates to an internal combustion engine (10) corresponding thereto.

A coolant diverter system and method of controlling coolant flow are provided. The coolant diverter system includes a coolant diverter body having a coolant inlet opening, a driveline retarder outlet opening and a bypass outlet opening. The coolant diverter system also includes a valve positioned in the coolant diverter body. The valve is configured in a first valve orientation to fluidly couple the coolant inlet opening to the driveline retarder outlet opening in isolation from the bypass outlet opening. The valve is configured in a second valve orientation to fluidly couple the coolant inlet opening to the driveline retarder outlet opening and the bypass outlet opening. The coolant diverter system also includes a valve controller configured to place the valve in the first valve orientation in response to activation of a driveline retarder coupled to the driveline retarder outlet opening for braking.

A thermal management system is disclosed configured to regulate the temperature of a number of vehicle components. The system comprises one expansion tank and two or more coolant circuits each configured to regulate the temperature of a vehicle component of the number of vehicle components. Each coolant circuit of the two or more coolant circuits comprises a heat exchanger configured to regulate the temperature of coolant in the coolant circuit, a coolant pump comprising a pump inlet, and a static line fluidly connecting the pump inlet to the expansion tank. The present disclosure further relates to a vehicle comprising a thermal management system.

The present invention relates to a method for controlling a vehicle in association with a descent, the vehicle having a powertrain comprising: a drive unit configured to provide propulsion power; an auxiliary brake device; and a first cooling circuit comprising a first coolant; wherein the drive unit and the auxiliary brake device are arranged to be selectively connected or disconnected with/from the first cooling circuit, wherein the drive unit has a first maximum temperature and the auxiliary brake device has a second maximum temperature higher than the first maximum temperature, the method comprising: controlling the drive unit to reduce the provided propulsion power when the vehicle is approaching an upcoming descent, which fulfils predetermined criteria; disconnecting the drive unit from the first cooling circuit; connecting the auxiliary brake device with the first cooling circuit; and controlling the auxiliary brake device to brake to vehicle down the descent.