Systems and methods are provided for determining a temperature of a thermal system that includes fluid conduits. A sensor monitors a current state of the temperature. A controller receives a signal from the sensor that is representative of the current state; determines a flow in the fluid conduits; determines a noise covariance of the thermal system; processes a thermal model of the thermal system; predicts a next-step state of the parameter at a time after the current state; and corrects the next-step state based, at least in-part, on the noise covariance resulting in a corrected next-step state.

Methods and systems are provided for controlling operation of an engine of a vehicle to supply power to a power box that in turn supplies power to loads external to the vehicle. In one example, a method comprises, responsive to a request by an operator to operate an engine to power one or more loads external to the vehicle, monitoring an engine temperature and issuing an alert requesting the operator to take mitigating action to reduce the engine temperature when the engine temperature reaches a threshold temperature, and controlling a cooling fan as a function of whether or not the mitigating action is taken. In this way, fuel economy may be improved and power supply to power external loads may be optimized.

Methods and systems are provided for a coolant jacket insert. In one example, a system may include a coolant jacket arranged in a block comprising an insert with a first internal passage configured to direct coolant from an inlet manifold of the coolant jacket directly to a portion of the coolant jacket arranged in a cylinder head.

Methods and systems are provided for a coolant jacket insert. In one example, a system may include a coolant jacket arranged in a block comprising an insert with a first internal passage configured to direct coolant from an inlet manifold of the coolant jacket directly to a portion of the coolant jacket arranged in a cylinder head.

Systems and methods are provided for determining a temperature of a thermal system that includes fluid conduits. A sensor monitors a current state of the temperature. A controller receives a signal from the sensor that is representative of the current state; determines a flow in the fluid conduits; determines a noise covariance of the thermal system; processes a thermal model of the thermal system; predicts a next-step state of the parameter at a time after the current state; and corrects the next-step state based, at least in-part, on the noise covariance resulting in a corrected next-step state.

A vehicle thermal management system includes a radiator receiving a liquid coolant in a coolant supply line and discharging the coolant into a coolant pump supply line. A coolant pump receives the coolant from the coolant pump supply line and discharges the coolant into multiple engine components. A transmission oil heat exchanger defining a first transmission oil heat exchanger receives the coolant after being discharged from the multiple engine components. An air-to-coolant sub-cooling heat exchanger defines a second transmission oil heat exchanger. The sub-cooling heat exchanger receives a portion of the coolant bypassing the multiple engine components.

A vehicle propulsion system includes an engine having a coolant inlet and a coolant outlet, a coolant pump having an outlet in communication with the engine coolant inlet, a pressure sensor in fluid communication with the engine coolant outlet and that generates a pressure signal indicative of a pressure in the engine coolant outlet, and a controller in communication with the pressure sensor and the coolant pump. The controller is programmed to control a flow of coolant through the engine from the coolant pump based upon the pressure signal.

A control method and a control device are provided for an internal combustion engine structured to vary a mechanical compression ratio by varying a range of slide of a piston with respect to a cylinder bore, and structured to control a flow of cooling water in a water jacket formed around the cylinder bore, wherein variation of the mechanical compression ratio causes the piston to slide on a corroded portion formed in the cylinder bore. A control process includes: acquiring a temperature correlating with a cylinder bore wall temperature; and stopping the flow of cooling water in the water jacket, in response to a condition that the acquired temperature is lower than a preset temperature point.

A coolant pump for a vehicle includes an impeller mounted at one side of a shaft and configured to pump a coolant, a pulley mounted at the other side of the shaft and configured to receive torque, a pump housing including an inlet into which the coolant inflows and an outlet of which the coolant flows out, a slider disposed to be movable in a longitudinal direction of the shaft so as to selectively block or open the outlet and a driver configured to move the slider, where a passage which supplies the coolant to at least one heat exchange element is formed on the pump housing.

A control method for a cooling system includes determining, by the controller, whether the output signal of the ambient temperature sensor satisfies a predetermined an ambient low temperature driving condition, determining, by the controller, whether the output signal of the first coolant temperature sensor satisfies a predetermined first low temperature driving condition when the output signal of the ambient temperature sensor satisfies the predetermined the ambient low temperature driving condition and controlling, by the controller, the operation of the coolant control valve unit to open the first coolant passage and the third coolant passage and to close the second coolant passage when the output signal of the first coolant temperature sensor satisfies the predetermined first low temperature driving condition.