An automotive vehicle includes an internal combustion engine that outputs exhaust gas from a cylinder, and an active thermal management system. The active thermal management system flows coolant around the cylinder thereby varying an exhaust temperature of the exhaust gas. An electronic engine controller controls the internal combustion engine and the active thermal management system. The engine controller generates a control signal to selectively operate the active thermal management system in a normal mode, a thermal increase mode, and a thermal decrease mode. The normal mode flows the coolant at a first coolant temperature. The thermal increase mode flows the coolant at a second coolant temperature greater than the first coolant temperature thereby increasing the exhaust temperature of the exhaust gas. The thermal decrease mode flows the coolant at a third coolant temperature less than the first coolant temperature thereby decreasing the exhaust temperature of the exhaust gas.

A system and method for controlling engine coolant including generating one of a plurality of zone flow requests for engine coolant, generating a first search zone, determining a plurality of key points for the first search zone, determining a unique combination of commands for each key point of the plurality of key points in the first search zone, determining a flowrate associated with each command for each key point of the plurality of key points, calculating a total cost for each key point using an absolute normalized error for each flowrate of each command for each key point, determining a first winning key point associated with a lowest total cost, and controlling a plurality of actuators based on the commands associated with the first winning key point.

A cooling system for an electrically driven motor vehicle, including a central computing unit, a cooling circuit including at least a pump for circulation of a coolant fluid, a solenoid valve, and a radiator. The cooling circuit is configured for cooling a battery charger and an electrical motor connected to an electronic control device. The central computing unit is configured to manage activation of each pump, including potential faults of each of the pumps.

An active thermal management system for a vehicle and a method of operating the system are provided. The active thermal management system may include, but is not limited to, an exhaust gas temperature sensor, an engine metal temperature sensor, an engine coolant output temperature sensor, an engine oil temperature sensor, a cooling system, and a controller, the controller configured to determine when the vehicle is in a tow/haul mode, operate the cooling system when at least one of the temperature of the exhaust gas, the engine metal, the coolant output from the engine and the temperature of the engine oil is greater than a predetermined temperature, and operate the cooling system to bypass a radiator when all of the temperature of the exhaust gas, the engine metal, the temperature of the coolant, and the temperature of the engine oil is lower than a predetermined low temperature.

A cooling apparatus of an engine of the invention has a circulation passage for supplying cooling water to head and block passages through a heat exchanger. The apparatus circulates the cooling water through the circulation passage when a second condition is satisfied and then, a first condition is satisfied. The first condition includes a water supply condition that a supply of the cooling water to the exchanger is requested. The second condition includes the water supply condition and a condition that a cooling water temperature is lower than an engine completely-warmed water temperature.

A thermostat for controlling flow of a coolant fluid through an aperture, the thermostat including a temperature sensitive valve for controlling the opening and closing of the aperture, the temperature sensitive valve including: a valve body having a heat sensitive material and a displaceable pin; a flange configured to seal off the aperture when the temperature sensitive valve is closed; a support member and a flexible member located between the flange and the support member; the thermostat further including a valve seat and a control piston configured to control the position of the valve seat within the thermostat.

A cooling control device includes a coolant pump being driven at an internal combustion engine to supply a coolant of the internal combustion engine, a heat exchanger being provided at each of plural flow paths that are formed in parallel to one another, a flow amount control valve controlling the coolant being supplied to the plural flow paths, and a control portion controlling the flow amount control valve. The control portion performs a control in a first supply mode in which the coolant is supplied to a first flow path, and a second supply mode in which the coolant is supplied to a second flow path during a supply of the coolant to the first flow path. The control portion operates a switching control shifting to the second supply mode temporarily in a state of being in the first supply mode, and returning to the first supply mode.

A cooling device includes a first cooling medium circuit for circulating a cooling medium that passes through a main body of an engine to a first heat exchanger, a second cooling medium circuit for circulating a cooling medium that passes through the main body to a second heat exchanger, a control valve that is commonly used in the first and second cooling medium circuits, and a control device. The control valve includes a rotatable rotor, and is configured such that a rotation range of the rotor includes a water stop section in which the circuits are both closed. The control device restricts output power of the engine in a period in which the rotation angle is in the water stop section, when the rotor rotates via the water stop section at an operating time of the control valve.

In a vehicle cooling system, a quantity of warm coolant stored within a thermally insulated tank is used to heat engine lubricating oil in an engine warm-up phase following a cold start. A conduit feeding coolant leaving the engine is connected to an inlet of the tank via a reduced cross-section or a labyrinth pathway. The conduit is connected to an inlet of an electronically controlled distribution valve having three outlets connected to the oil cooler, a passenger compartment heater, and a radiator. In an initial part of the warm-up phase, the valve is closed, and the entire flow of coolant leaving the engine flows into the tank, moving the quantity of warm coolant previously stored in the tank to the oil cooler, where it contributes to more rapid heating of the lubricating oil. When the engine is switched-off, the tank is again filled with warm coolant from the engine.

A device and method for cooling an air cooled motorcycle engine. A fan and a cover acting as a duct directs engine heat forward away from a rider when the motorcycle engine is hot and the motorcycle is stopped. When the motorcycle is in motion the fan is switched off and the passing air takes a reversed path and flows rearward over the engine fins cooling the engine.