A control system for a cooling fan that can ensure cooling capability of the cooling fan is provided. The control system includes an engine, a work implement driven by the engine, a cooling fan configured such that the number of rotations thereof is controllable independently of the number of rotations of the engine, and a controller that controls the cooling fan. The controller controls the cooling fan to make a difference in frequency between the cooling fan and the engine larger than the difference at a time point when the controller obtains the frequency of the cooling fan, by changing the frequency of the cooling fan when the number of rotations of the engine is larger than a threshold value and the frequency of the cooling fan is within a prescribed range from a frequency of the engine while the work implement is in a standstill.

A cooling system for an air-cooled engine includes a plurality of electric fans, a plurality of ducts, each duct configured to receive one of the plurality of electric fans, a housing, the housing configured to be coupled to the engine and to include at least one opening, each opening is configured to be coupled to receive one of the plurality of ducts to direct air from the electric fans to a plurality of target locations, a sensor, the sensor is configured to acquire sensor data regarding the operation of the engine, and a processing circuit, the processing circuit is configured to receive the sensor data from the sensor and to control operation of the plurality of electric fans in accordance with the sensor data.

A piston oil squirter is selectively opened when an oil temperature is below a threshold oil temperature to transfer heat from the combustion chamber and heat the oil more rapidly when the engine is cold.

Various embodiments of systems and methods related to controlling oil injection for piston cooling in an engine are disclosed. In one embodiment, a method includes during an engine cold start event, enabling oil injection onto a piston of an engine, disabling oil injection after the engine cold start event, and re-enabling oil injection after the engine cold start event based on a first operating parameter.

A coolant control system of a vehicle includes an adjusting module that: (i) receives an engine output coolant temperature measured at a coolant output of an internal combustion engine; (ii) adjusts the engine output coolant temperature based on a reference temperature to produce a first adjusted coolant temperature; (iii) receives an engine input coolant temperature measured at a coolant input of the internal combustion engine; and (iv) adjusts the engine input coolant temperature based on the reference temperature to produce a second adjusted coolant temperature. The coolant control system also includes a difference module that determines a difference between the first and second adjusted coolant temperatures. The coolant control system also includes a pump control module that controls a coolant output of a coolant pump based on the difference between the first and second adjusted coolant temperatures.

A heat exchanger includes a plurality of plates that is stacked together to constitute first flow passages, second flow passage, third flow passage, fourth flow passage and fifth flow passage. An engine coolant flows through the first flow passages. An engine oil flows through the second flow passages and fourth flow passages. A transmission oil flows through the third flow passages and fifth flow passages. Triple-flow-passage arrangement layers in each of which each first, second, and third flow passages are disposed, and dual-flow-passage arrangement layers in each of which each fourth and fifth flow passages are disposed are alternately arranged such that flow passages of each same type are not overlaid with one another in a stacking direction of the plates.

A battery heating system for a hybrid aircraft powertrain includes a combustion engine, a battery pack, a combustion engine coolant circuit, and a battery pack coolant circuit. The battery heating system further includes a heat exchanger configured to exchange heat between the combustion engine coolant circuit and the battery pack coolant circuit. The battery heating system further includes at least one throttling device operatively connected to one of the combustion engine coolant circuit or the battery pack coolant circuit. The battery heating system further includes a controller configured to transmit a signal to the at least one throttling device to adjust a flow of coolant through the heat exchanger of at least one of the combustion engine coolant circuit or the battery pack coolant circuit.

A cooling system for an internal combustion engine is equipped with an air conditioner having a heat exchanger, a first passage connected to the heat exchanger and supplies cooling water of the engine to the heat exchanger, a second passage connected to a cooling apparatus for oil which fills a speed change mechanism connected to the engine or for oil which fills the engine and which supplies the cooling water to the cooling apparatus, a flow control valve configured to control the flow rate of the cooling water to the first passage and the second passage, and a controller configured to control the engine and the flow control valve. When the temperature of the oil is higher than the temperature of the cooling water, the controller performs a first control which controls the flow control valve to a position in which the first passage and the second passage are open.

A method and control arrangement for controlling operation of a fan in a cooling system of a vehicle, wherein operation of the fan is controlled based on a temperature of a coolant in the coolant system meeting a set-temperature of the coolant. The method comprises monitoring an engine oil temperature of an engine of the vehicle during a plurality of driving cycles with the vehicle; and adjusting the set-temperature of the coolant based on a measure indicative of a plurality of maximum temperatures of the engine oil during the plurality of driving cycles.

Snow groomer with a propulsion system in which an endothermic engine is accommodated in an engine compartment adjacent to the cabin and provided with a liquid cooling system provided with a radiator coupled to a fan configured to suck an air flow into the engine compartment. An electronic control unit controls the on/off cycle of the fan based on a signal T.sub.Water that is a function of the measured temperature of the cooling liquid in the radiator and a reference signal T.sub.Water_ref representing a target temperature. The control unit processes a further control signal Tc relating to the amount of the heat flow from the engine to the cabin and compares the control signal Tc with a reference signal Tcref to control the start-up of the fan to generate the intake of air at room temperature into the engine compartment and the expulsion of hot air from the engine compartment.