A system includes a coolant pump and a first rotary valve. The coolant pump is configured to be mechanically driven by an engine and to send coolant to an inlet of the engine. The first rotary valve is configured to receive coolant from an outlet of the engine and to send coolant to a first radiator and a heater core. The first rotary valve is adjustable to a zero flow position to prevent coolant flow to the first radiator and the heater core and thereby increase a rate at which the engine warms coolant flowing therethrough.

A cooling system is provided to cool fluid used in a device mounted on a vehicle, by exchanging heat with cooler cooling water in a cooler. The system includes a cooling water passage connected to the cooler and having an undercover cooling water passage provided to an undercover, a cooler radiator configured to cool the cooler cooling water by exchanging heat between the cooler cooling water and air flowing into an engine bay from a grille, a flow rate adjuster configured to adjust a flow rate of the cooler cooling water supplied the undercover cooling water passage, and a controller configured to acquire at least a pressure or a temperature of the fluid, and control the flow rate adjuster to increase the flow rate of the cooler cooling water supplied to the undercover cooling water passage based on an increase in the pressure or the temperature of the fluid.

A vehicle includes first and second heat exchangers, a shutter member, first and second detectors, and a control device. The first and second heat exchangers are disposed in an engine room. The first heat exchanger is used for cooling of an engine. The second heat exchanger is used for recovery of exhaust heat of the engine. The shutter member opens and closes a grille opening in a front portion of the engine room. The first detector detects a feed forward system parameter indicating a sign of a load increase the first exchanger or the second heat exchanger. The second detector detects a feedback system parameter indicating that a load in the first exchanger or the second heat exchangers has increased. The control device controls opening and closing of the shutter member and adjusts an opening degree of the shutter member based on the feed forward and feedback system parameters.

A self-propelled earth working machine includes a traveling gear, a machine frame supported by the traveling gear, a power source accommodated on the machine frame for providing power for a travel operation and/or for an earth working operation, a working apparatus accommodated on the machine frame for earth working, and a cooling device for cooling a functional device of the earth working machine. The cooling device includes at least one heat exchanger system for transferring heat from a cooling medium to air, and a ventilator system, which is on the one hand designed and situated to produce a cooling air flow passing the heat exchanger system and which is on the other hand designed and situated to produce in the area of the power source a ventilation air flow flowing away from the power source. The heat exchanger system and a ventilation volume, in which the ventilation air flow flows away from the power source, are situated on the suction side of the ventilator system, the ventilation volume being situated downstream of the heat exchanger system relative to the cooling air flow, so that the ventilation air flow generated by the ventilator system meets the cooling air flow downstream of the heat exchanger system and upstream of the ventilator system.

A cooling system of a hybrid vehicle includes a radiator, an openable and closable first shutter, an openable and closable second shutter, and a control device. The radiator is placed forward of an internal combustion engine and a heat generation device configured to generate heat along with operation of the drive motor, and the radiator communicates with the heat generation device and the internal combustion engine such that a coolant circulates through the internal combustion engine and the heat generation device. The first shutter extends from a front end of an undercover so as to cross between the radiator, and the heat generation device and the internal combustion engine. The second shutter extends between a front end part of the undercover and a lower part of the radiator. The control device controls opening and closing of the first shutter and the second shutter.

An automobile includes a fan configured to send cooling air, a fan driving apparatus, a first electronic control unit, and a second electronic control unit. The first electronic control unit is configured to output a first driving control signal to the fan driving apparatus when an ignition switch is turned off and a predetermined condition is established. The second electronic control unit is configured to determine whether or not the first driving control signal has been output by monitoring the signal line when the ignition switch is turned off. The second electronic control unit is configured to output a second driving control signal to the fan driving apparatus when determination is made that the first driving control signal has not been output to the fan driving apparatus from the first electronic control unit, the ignition switch is turned off, and the predetermined condition is established.

A cooling system includes a fan, a first fluid circuit, and a second fluid circuit. The first fluid circuit includes a first fluid, a first heat exchanger, a first exchanger bypass, and a first thermostat to selectively control flow of the first fluid between the first heat exchanger and the first exchanger bypass. The second fluid circuit is fluidly independent of the first fluid circuit. The second fluid circuit includes a second fluid separate from the first fluid, a second heat exchanger, a second exchanger bypass, and a second thermostat to selectively control flow of the second fluid between the second heat exchanger and the second exchanger bypass. The fan is positioned in proximity to the first heat exchanger and the second heat exchanger to cool the first fluid and the second fluid dependent upon operation of the first thermostat and the second thermostat, respectively.

A mobile pump unit including a mobile trailer having mounted thereon one or more pumps, an internal combustion engine(s) to power the one or more pumps, and a heat exchanger assembly for cooling a fluid for the engine, transmission, hydraulic driven components, or pressure pump. The heat exchanger assembly includes a heat exchanger with an air inlet. The air inlet faces the engine and is for receiving air. In addition to the air inlet, the heat exchanger has a fluid inlet for receiving the fluid; a heat exchange surface for transferring heat from the fluid to the air; an air outlet for discharging the air; and a fluid outlet for delivering the fluid to the engine. The heat exchanger assembly also includes an air circulation device for moving the air through the heat exchanger, and an air intake duct that directs the air into the air inlet of the heat exchanger. The air intake duct is configured to resist heated air produced by the engine from entering the air inlet.

A cooling system includes a fan, a first fluid circuit, and a second fluid circuit. The first fluid circuit includes a first fluid, a first heat exchanger, a first exchanger bypass, and a first thermostat to selectively control flow of the first fluid between the first heat exchanger and the first exchanger bypass. The second fluid circuit is fluidly independent of the first fluid circuit. The second fluid circuit includes a second fluid separate from the first fluid, a second heat exchanger, a second exchanger bypass, and a second thermostat to selectively control flow of the second fluid between the second heat exchanger and the second exchanger bypass. The fan is positioned in proximity to the first heat exchanger and the second heat exchanger to cool the first fluid and the second fluid dependent upon operation of the first thermostat and the second thermostat, respectively

A cooling system of a hybrid vehicle includes a radiator, an openable and closable first shutter, an openable and closable second shutter, and a control device. The radiator is placed forward of an internal combustion engine and a heat generation device configured to generate heat along with operation of the drive motor, and the radiator communicates with the heat generation device and the internal combustion engine such that a coolant circulates through the internal combustion engine and the heat generation device. The first shutter extends from a front end of an undercover so as to cross between the radiator, and the heat generation device and the internal combustion engine. The second shutter extends between a front end part of the undercover and a lower part of the radiator. The control device controls opening and closing of the first shutter and the second shutter.