A generator set is disclosed. The generator set may include a liquid-cooled engine and an alternating current (AC) generator coupled to the liquid-cooled engine. The generator set may include an AC fan associated with the liquid-cooled engine and connected to the AC generator via a relay and an engine control module (ECM) associated with the liquid-cooled engine and connected to the AC fan via the relay. The generator set may include an engine temperature sensor associated with the liquid-cooled engine and connected to the ECM via a first circuit and an engine air temperature sensor associated with the liquid-cooled engine and connected to the ECM via a second circuit.

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 thermostat for an engine cooling system is arranged between an engine and a radiator. The thermostat may include: a housing having a coolant inlet through which inflow coolant flows in from the engine and a radiator side outlet; a main valve provided in the housing and coupled to one side of a wax to open and close the radiator side outlet by a change in volume of the wax; and a heating unit coupled to the other side of the wax to supply heat to the wax.

An example system includes an engine and an exhaust passage fluidly coupled to the engine. A waste heat recovery system includes a boiler operatively coupled to the exhaust passage, and a condenser fluidly coupled to the boiler. An integrated cooling system includes an engine cooling circuit, a waste heat recovery cooling circuit, a waste heat recovery bypass valve, and a controller. The waste heat recovery bypass valve is operatively coupled to the exhaust passage upstream of the boiler, and is selectively controllable so as to direct at least a portion of the exhaust gas through an exhaust bypass passage so as to bypass the boiler. The controller is in operative communication with the waste heat recovery bypass valve. The controller is structured to determine a cooling demand of the engine, and to control a valve position of the waste heat recovery bypass valve based on the cooling demand.

Methods and systems are provided for a control device for adjusting coolant flow. In one example, the control device may be shaped to receive charge air, engine coolant, and charge-air cooler coolant to adjust a flow of charge-air cooler coolant to a radiator.

The present application refers to an internal combustion engine comprising a turbocharger, an intercooler and a cooling circuit for cooling of the intercooler, the cooling circuit comprising adjusting means for adjusting a temperature of a cooling liquid of the cooling circuit flowing through the intercooler, the internal combustion engine comprising a controller for controlling the adjusting means of the cooling circuit, the controller comprising a function for determining a dew point temperature of the charge air, characterized in that the controller is configured to control the temperature of the cooling liquid and/or of the intercooler relative to the dew point temperature.

Methods and systems are provided for monitoring a status of a heater core isolation valve (HCIV) housing in an engine coolant circuit including a first coolant loop and a second coolant loop. In one example, a method may include indicating degradation of the HCIV based on a difference between a first coolant loop temperature and a second coolant loop temperature upon activation of coolant system pumps and deactivation of a positive temperature coefficient (PTC) heater housed in the cabin heating loop.

A water jacket of an engine is capable of implementing cooling water flows as both a cross flow and a parallel flow. The water jacket includes a head water jacket formed in a cylinder head of an engine; a block water jacket formed in a cylinder block of the engine; and a variable partition wall which is configured to induce a cross flow of cooling water in a space between positions of cylinders in the head water jacket, where the variable partition wall has a shape configured to be varied according to an engine operating condition, and the variable partition wall allows the cooling water to flow in a selected one of the cross flow and a parallel flow according to the shape which is varied in head water jacket.

An engine and cabin thermal management system for use with a vehicle having an engine, a cabin heating system configured to thermally heat a cabin of the vehicle, a coolant system operably coupled to the engine and to the cabin heating system to thermally manage a temperature of the engine and a temperature of the cabin. The coolant system having one or more coolant thermal storage units fluidly coupled with a radiator and heater core of the coolant system forming a coolant loop. The system further having a control system configured to monitor and maintain at least a predetermined coolant temperature at the cabin heating system even during a coolant temperature decrease at the engine stops.

A method can include: acquiring, via one or more sensors disposed in a vehicle, one or more engine operation parameters relating to operation of an internal combustion engine disposed along a coolant flow path in the vehicle; calculating at least one target coolant temperature according to the one or more engine operation parameters; and controlling a valve actuator to regulate flow of a coolant through the coolant flow path via an electric coolant valve operatively coupled to the valve actuator such that a temperature of the coolant changes in accordance with the at least one target coolant temperature.