In a cooling apparatus including a high-temperature-side radiator in a high-temperature-side cooling circuit supplying a high-temperature coolant to a cylinder head, a low-temperature-side radiator in a low-temperature-side cooling circuit supplying a low-temperature coolant to an intercooler, and an electronic control unit, the high-temperature-side cooling circuit includes a first coolant passage where the high-temperature coolant flows around an exhaust port, a second coolant passage where the high-temperature coolant flows through the cylinder head without flowing around the exhaust port, and a flow rate adjustment valve adjusting a flow rate of the high-temperature coolant flowing through the first coolant passage. The electronic control unit executes a response improvement process for controlling the flow rate adjustment valve to reduce the flow rate of the high-temperature coolant flowing through the first coolant passage, and for controlling the low-temperature-side pump to increase a flow rate of the low-temperature coolant circulating through the low-temperature-side cooling circuit.

A method for thermal management of a motor vehicle engine includes one or more of the following: determining a current lube oil temperature; determining a lube oil temperature for optimal friction; turning on piston cooling jets based on the current lube oil temperature and the lube oil temperature for optimal friction; and turning off the piston cooling jets.

A system includes an engine defining a water jacket fluidly coupled to a heat exchanger. An exhaust manifold defines an exhaust manifold cooling passage. A pump is fluidly coupled to the water jacket, and to each of the heat exchanger and the exhaust manifold cooling passage. An engine cooling circuit includes the water jacket, the heat exchanger, and the pump. An exhaust cooling circuit is selectively fluidly coupled to the engine cooling circuit. The exhaust cooling circuit includes the water jacket, the exhaust manifold cooling passage, and the pump. A control valve includes an inlet fluidly coupled to a first portion of the water jacket. A first outlet is fluidly coupled to a second portion of the water jacket. A second outlet is fluidly coupled to the exhaust cooling circuit. The control valve is structured to selectively control flow of coolant fluid through the second outlet.

A system includes an engine defining a water jacket fluidly coupled to a heat exchanger. An exhaust manifold defines an exhaust manifold cooling passage. A pump is fluidly coupled to the water jacket, and to each of the heat exchanger and the exhaust manifold cooling passage. An engine cooling circuit includes the water jacket, the heat exchanger, and the pump. An exhaust cooling circuit is selectively fluidly coupled to the engine cooling circuit. The exhaust cooling circuit includes the water jacket, the exhaust manifold cooling passage, and the pump. A control valve includes an inlet fluidly coupled to a first portion of the water jacket. A first outlet is fluidly coupled to a second portion of the water jacket. A second outlet is fluidly coupled to the exhaust cooling circuit. The control valve is structured to selectively control flow of coolant fluid through the second outlet.

A system for controlling a fan in a vehicle having a heat exchanger may include defining first and second geographic areas and determining a geographic location of the vehicle. A processor may be programmed to send a signal to operate the fan in a first rotational direction to move air through the heat exchanger in a first direction, and to send a signal to the fan to operate it in a second rotational direction opposite the first rotational direction to move air through the heat exchanger in a second direction opposite the first direction when a plurality of conditions are met.

A cooling-water control valve, which controls a flow rate of cooling water for an engine, includes a housing and a valve member. The housing has multiple outlet ports. The valve member is movably provided in the housing, so that it is rotatable around an axis line of the valve member. The valve member has multiple opened portions. Each of the opened portions is formed at a position, which is different from one another in an axial direction of the valve member. Each of the opened portions is operatively communicated to one of the outlet ports. The valve member changes a communication ratio between the opened portion and the outlet port depending on a rotational position of the valve member. The cooling-water control valve is provided at a position between the engine and an electric power converting device.

An intake-air temperature controlling device for an engine is provided, which includes an engine body, an intake passage, an air intake part, an intake air temperature adjuster configured to adjust air temperature taken in through the air intake part to the passage, and a controller. An operating range in which the CI combustion is performed has a lean operating range in which A/F of mixture gas formed inside the cylinder, or G/F that is a relationship between the total weight G of gas inside the cylinder and a weight F of fuel fed to the cylinder is relatively low, and a rich operating range in which the A/F or G/F is relatively high. When the engine is in the lean operating range, the controller outputs a control signal to the intake air temperature adjuster so that the air temperature is increased, as compared in the rich operating range.

A battery thermal management system for a vehicle having a drivetrain. The thermal management system includes: a high-voltage propulsion battery, a waste-heat source of the vehicle drivetrain, and a battery heating circuit configured for circulating a battery coolant. The battery heating circuit includes a pipe being routed in the vicinity of, and spaced-apart from, the waste-heat source and configured for conveying the battery coolant for enabling the battery coolant within the pipe to heat-up by heat-radiation emitted from the waste-heat source and/or heat-convection through air from the waste-heat source to the battery coolant, and the battery heating circuit is configured for conveying the heated battery coolant to the battery for enabling heating of the battery by the battery coolant.

A cooling water control valve controls a flow amount of a cooling medium of an engine, and includes a housing and a valve body. The housing includes output ports. The valve body is enabled to rotate about a central axis in the housing and includes openings. The openings are located at different positions in an axial direction and configured to communicate to the output ports, respectively. The valve body changes a communication degree between the opening and the output port according to a rotational position. The cooling water control valve is placed such that an axial direction of the valve body is substantially orthogonal to an axial direction of a crankshaft of the engine.

A cooling-water control valve as a valve device includes a housing and a valve member. The housing has an inlet port and multiple outlet ports, each of which connects an inner space of the housing to an outside. The valve member is rotatably provided in the inner space of the housing and connects the inlet port to the multiple outlet ports or disconnects the inlet port from the outlet ports depending on a rotational position of the valve member. The inlet port is communicated to the inner space of the housing independently of the rotational position of the valve member. At least a part of one outlet port overlaps with one or more than one of the other outlet ports, when viewed them in an axial direction of the valve member.