Pump assembly for recirculating a cooling fluid of a heat engine, comprising: a pump body, an impeller driven by a driven shaft and inserted in a chamber of the circuit for recirculating the cooling fluid of the heat engine; at least a reversible friction clutch, adapted to transmit the motion from motion generating means, coupled to the motor shaft of the vehicle, to the driven shaft, an electric motor to drive said driven shaft independently of the heat engine; wherein said electric motor and said friction clutch are arranged in an axially external position with respect to the motion generating means of the clutch. Preferably, said electric motor is axially opposed to the friction clutch with respect to the motion generating means, and is axially adjacent to the chamber of the impeller in the axial direction.

A pump group has an impeller, a shaft having an impeller end on which the impeller is mounted and a control end for receiving a rotary control action, and a pump body having an impeller body housing the impeller, a shaft body partially housing and supporting the shaft in free rotation, and a control body integrally connected to the shaft body and having a control cavity through which the control end extends axially. The pump group has a mechanical drive having a rotating member mounted in free rotation on the control body for receiving an external action from an external group, a rotating drum integrally connected to the control end, and a control device configurable in an engagement configuration, in which the rotating member and the rotating drum are engaged to rotate together, and a disengagement configuration, in which the rotating member is separate from the rotating drum rotating individually.

A cooling system of an internal combustion engine includes a plurality of components in the form of heat sources, coolant pumps, actuator devices, and temperature sensors that are fluidically connected to one another via coolant lines, wherein a plurality of cooling circuits, each including at least one of the various components, is formed. In addition, a control device is provided that is in signal-conducting connection with at least one of the temperature sensors, with at least one of the coolant pumps, and with at least one of the actuator devices. The control device stores information concerning the association of the individual components with the various cooling circuits and their specific arrangement relative to one another in the individual cooling circuits, information concerning which of the coolant pumps during operation brings about a coolant flow in the individual cooling circuits, information concerning which actuator device(s) may be used to set a volume flow of the coolant by the individual heat sources, and information concerning a setpoint temperature that is stored for each of the heat sources, The control device also is designed to automatically set a volume flow of coolant through the heat sources that is required for reaching the setpoint temperatures, by appropriate control of the particular coolant pump(s) and actuator device(s).

A parallel hybrid vehicle includes: an engine serving as a drive source for travel of the parallel hybrid vehicle; an electric motor serving as a drive source for travel of the parallel hybrid vehicle; and a water pump that causes a cooling liquid to circulate in a cooling path. The water pump is connected to the engine to receive power from the engine and is connected to the electric motor to receive power from the electric motor.

An engine cooling structure includes a head gasket sitting between a bottom surface of a cylinder head and a top surface of a cylinder block, a connection water passage for coolant that connects an in-head water jacket and an in-block water jacket to each other, and a reed valve that opens and closes in correspondence with a differential pressure of coolant in the in-head water jacket and coolant in the in-block water jacket. The reed valve includes a reed portion arranged integrally with a part of the head gasket corresponding to the connection water passage.

A cooling system for a powertrain includes: a rotating electrical machine unit including a rotating electrical machine; and a power control unit configured to drive the rotating electrical machine. The cooling system includes: a radiator configured to cool a refrigerant; a refrigerant circulation circuit configured to supply the refrigerant flowing out from the radiator to a second cooled portion via a first cooled portion; a bypass flow path bypassing the second cooled portion; a flow control valve configured to adjust the ratio of a second refrigerant flow rate to a first refrigerant flow rate; and a control device configured to control the flow control valve. The control mode of the flow control valve includes a flow rate limiting mode in which the flow control valve is controlled to adjust the ratio such that the second refrigerant flow rate becomes less than the first refrigerant flow rate.

Systems and methods for simultaneously performing engine coolant stagnation and exhaust gas recirculation (EGR) cooler cooling in an engine include providing a coolant circuit configured to flow coolant through both a block of the engine and an EGR cooler of a cooled EGR (CEGR) system of the engine, a main pump on the coolant circuit that is driven by an electric motor or a crankshaft of the engine to pump coolant through a block of the engine, and a secondary pump on the coolant circuit that, when energized, is configured to pump coolant through the coolant circuit, and, during a cold start of the engine, de-energizing the electric motor or disconnecting the main pump from the engine crankshaft to stagnate coolant in the engine block and energizing the secondary pump to flow coolant through the EGR cooler of the CEGR system.

Methods and systems are provided for a cooling arrangement. In one example, the cooling arrangement comprises flowing coolant to only an upper portion of a cylinder head during a cold-start. The cooling arrangement comprises flowing coolant to a cylinder block, a lower portion of the cylinder-head, and the upper portion of the cylinder head outside of the cold-start.

This cooling device for an amphibious vehicle includes: a heat exchanger mounted in the amphibious vehicle; a coolant introduction passage through which cooling air or cooling water can be introduced from the outside to the heat exchanger as a coolant; a cooling air discharge passage through which the cooling air having passed through the heat exchanger can be discharged to a cooling air discharge portion communicating with the outside; and a cooling water discharge passage through which the cooling water having passed through the heat exchanger can be discharged to a cooling water discharge portion communicating with the outside. The cooling air discharge passage and the cooling water discharge passage are formed such that at least the cooling air discharge portion and the cooling water discharge portion are independent of each other.

A pump group for a cooling system of an engine of a vehicle, of the dual type is provided. The pump group includes an impeller mounted on a shaft commandable in rotation by an electric drive and a mechanical drive. The mechanical drive includes a rotating member commandable in rotation by mechanical movement devices in the vehicle, a rotary drum operatively connected to the shaft, a centrifugal clutch device including a central body integrally attached to the rotating member and a plurality of engagement elements movably fixed on the central body suitable to translate in a radial direction with respect to the axis (X-X) to engage the rotary drum.