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 motor vehicle may include an internal combustion engine, a radiator, a heat exchanger, a coolant pump, and a valve device arranged separately therefrom, which is controlled at an intake side by pressure. The valve device may include at least one first coolant inlet, at least one second coolant inlet, and a coolant outlet connected to an inlet of the coolant pump. The valve device may be configured to, based on a selected operating point of the coolant pump and a pressure in a coolant, at least one of open and close at least one of the at least one first coolant inlet and the at least one second coolant inlet. The at least one first coolant inlet and a coolant outlet of the coolant pump may be connected to the internal combustion engine, and the at least one second coolant inlet may be connected to the radiator.

The present invention relates to an engine coolant cooling system for a vehicle, and provides an engine coolant cooling system for a vehicle, which can increase the heat-dissipation performance of a radiator if necessary without increasing the size of the radiator, securing the cooling performance of the coolant.

An electric fluid pump for a motor vehicle includes a housing composite, a pump unit, a drive motor, a rotor shaft, and a motor controller which controls the drive motor. The housing composite defines a pump space, which includes a pump rotor space wherein a pump rotor of the pump unit is arranged, and a motor space wherein the drive motor is arranged, which together comprise a common end wall. The drive motor includes a motor stator, a motor coil arrangement, and a motor rotor. The rotor shaft co-rotatably connected to the motor rotor, and is arranged through the common end wall to rotate jointly with the pump rotor. The common end wall is a mounting wall part on which at least the motor controller is arranged. The motor coil arrangement is arranged on the motor stator and is provided on a side which is opposite to the motor controller.

When a prescribed execution condition is satisfied at the time of transition from HV traveling (that is, traveling performed by an engine and a motor with generation of traveling driving force by the engine) to EV traveling (that is, traveling performed by the motor without generation of traveling driving force by the engine), a controller of a hybrid vehicle performs motoring (or a self-sustaining operation) of an engine and thereafter stops the engine.

Provided is an internal combustion engine, comprising at least one cooling device for cooling at least one operational liquid of the internal combustion engine during and/or after operation of the internal combustion engine. The at least one cooling device has at least one heat exchanger and lines for transporting the at least one operational liquid to and from the at least one heat exchanger. The heat exchanger exchanges heat with a cooling medium, which cooling medium has during the operation of the internal combustion engine a lower temperature than the at least one operational liquid of the internal combustion engine. Heat is exchanged by the heat exchanger between the at least one operational liquid and the cooling medium, which cooling medium has before and/or during a starting operation of the internal combustion engine a higher temperature than the at least one operational liquid of the internal combustion engine.

An auxiliary machine-driving device is provided for a vehicle. The auxiliary machine-driving device has a first roller, a second roller, a third roller, a fourth roller and a fifth roller. The first roller rotates integrally with a rotary shaft of an engine. The second roller rotates integrally with a rotary shaft of a motor/generator. The third roller rotates integrally with a rotary shaft of an auxiliary machine. The fourth roller is provided between the first roller and the second roller. The fifth roller that always contacts the second roller and the third roller. The actuator switches the fourth roller between a contact state with the first and second rollers and a separation state from the first and second rollers.

A method for controlling a water pump for a vehicle includes: determining whether an engine is on; measuring a coolant temperature of the engine and an RPM of the engine when the engine is determined to be operated; determining whether the measured coolant temperature is equal to or greater than a predetermined coolant temperature; determining an RPM of a water pump, which adjusts a coolant flow rate, from the measured coolant temperature and the measured RPM of the engine, when the measured coolant temperature is determined to be equal to or greater than the predetermined coolant temperature; and controlling the water pump such that the water pump is operated according to the determined RPM of the water pump.

A vehicle control device for a vehicle including an engine that is a power source of the vehicle, and a heating unit that heats a coolant of the engine includes a water temperature determination part that determines whether or not a temperature of the coolant is lower than a predetermined value, and a heating control part that performs an operation limitation to stop an output of the heating unit or to limit the output of the heating unit to a predetermined upper limit value or lower, when the water temperature determination part determines that the temperature of the coolant is lower than the predetermined value.

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.