A liquid-cooled heat dissipation device is disclosed, comprising a main body, a centrifugal pump, an inlet pipe, an outlet pipe, a centrifugal fan and a motor. The main body comprises a shaft hole, liquid flow channels and airflow channels. The centrifugal pump guides a cooling liquid through the inlet pipe, main body and outlet pipe. The centrifugal fan guides air into the main body axially from the shaft hole. After passing through the centrifugal fan, the air forms centrifugal airflows and leaves the body radially through the airflow channels. With an extended flow path of the cooling liquid and the radial flow of the centrifugal airflow provided by the present invention, the temperature of the cooling liquid may be quickly reduced and the cooling effect may be improved. Thus, the structure is compact, small, light-weight, easy-to-assemble.

A lubricating system of an engine equipped with an idle reduction system includes an oil cooler, a remotely operable valve configured to open and close a bypass passage that bypasses the oil cooler, and an electronic control unit. The electronic control unit is configured to perform the steps of: controlling the valve so that a temperature of lubricating oil approaches a target temperature; and lowering the target temperature when an average torque of the engine is less than a predetermined threshold.

A rotary heat exchanger includes a hub configured to be rotatably driven by a shaft, a fan including a plurality of fan blades integrally coupled to the hub and extending radially outwardly therefrom, and a heat exchanger including a plurality of heat exchanger sections. The heat exchanger includes a plurality of cooling fins for receiving air from the fan. Each of the plurality of heat exchanger sections is located between two of the plurality of fan blades. The hub, the fan, and the heat exchanger are integrally formed as a single body by a three-dimensional printing process.

A fan control system for a variable pitch fan of a work vehicle includes a first sensor that measures a parameter of a cooling system and a blade pitch module that adjust a pitch of a plurality of blades of the variable pitch fan to generate airflow in a first direction. A reversing module selectively commands a fan reversal that includes instructing the blade pitch module to temporarily adjust the pitch of the plurality of blades to generate airflow in a second direction. A first timer module, in response to the reversing module commanding the fan reversal, resets and increments a first timer and compares the first timer to a first threshold. A first reversal prevention module, in response to the first timer being less than the first threshold, prevents the reversing module from commanding a fan reversal by indicating that a first type of fan reversal is not permitted.

A control device for an unmanned vehicle includes a temperature data acquisition unit acquiring temperature data of hydraulic oil supplied to a first hydraulic actuator actuating a steering device of the unmanned vehicle, and a command output unit outputting a change command for changing a travel parameter of the unmanned vehicle based on the temperature data.

A lubricating system of an engine equipped with an idle reduction system includes an oil cooler, a remotely operable valve configured to open and close a bypass passage that bypasses the oil cooler, and an electronic control unit. The electronic control unit is configured to perform the steps of: controlling the valve so that a temperature of lubricating oil approaches a target temperature; and lowering the target temperature when an average torque of the engine is less than a predetermined threshold.

A method for controlling a cooling system for a vehicle is provided. The system includes an engine, an EGR cooler, an oil cooler, a heater, a radiator, and a controller. The engine, the EGR cooler, the oil cooler, the heater, and the radiator are respectively connected through a coolant line and coolant circulates through the engine, the EGR cooler, the oil cooler, the heater, and the radiator by operation of a water pump. The controller receives the coolant from the engine and operates a control valve connected with the oil cooler, the heater, and the radiator. The method includes sensing driving conditions and operating the control valve when a warm mode is required to rapidly warm up the engine based on the sensed driving conditions. The control valve is operated based on modes that are controlled depending on a coolant temperature, and among modes, one is iteratively performed.

A method for controlling a cooling system for a vehicle is provided. The system includes an engine, an EGR cooler, an oil cooler, a heater, a radiator, and a controller. The engine, the EGR cooler, the oil cooler, the heater, and the radiator are respectively connected through a coolant line and coolant circulates through the engine, the EGR cooler, the oil cooler, the heater, and the radiator by operation of a water pump. The controller receives the coolant from the engine and operates a control valve connected with the oil cooler, the heater, and the radiator. The method includes sensing driving conditions and operating the control valve when a warm mode is required to rapidly warm up the engine based on the sensed driving conditions. The control valve is operated based on modes that are controlled depending on a coolant temperature, and among modes, one is iteratively performed.

A system for removing a volume of liquid including a pressure-sealed-pump-vessel, at least one liquid-aperture, a liquid-level-control-valve, a liquid-discharge, a sump-pump, a pressure-sealed-suction-vessel, and one or more vessel-connections. The one or more vessel-connections configured to fluidly couple the pressure-sealed-pump-vessel and the pressure-sealed-suction-vessel, in the preferred embodiment. The sump-pump is located within the pressure-sealed-pump-vessel and includes a pump-inlet and a pump-outlet. The pump-inlet fluidly coupled to the liquid-aperture, and the pump-outlet is fluidly coupled to the liquid-discharge. The sump-pump configured to pump the volume of liquid from the pressure-sealed-pump-vessel and from the system via the liquid-discharge to remove the volume of water from a roof surface or other similar horizontal or substantially horizontal surface.

A system for removing a volume of liquid including a pressure-sealed-pump-vessel, at least one liquid-aperture, a liquid-level-control-valve, a liquid-discharge, a sump-pump, a pressure-sealed-suction-vessel, and one or more vessel-connections. The one or more vessel-connections configured to fluidly couple the pressure-sealed-pump-vessel and the pressure-sealed-suction-vessel, in the preferred embodiment. The sump-pump is located within the pressure-sealed-pump-vessel and includes a pump-inlet and a pump-outlet. The pump-inlet fluidly coupled to the liquid-aperture, and the pump-outlet is fluidly coupled to the liquid-discharge. The sump-pump configured to pump the volume of liquid from the pressure-sealed-pump-vessel and from the system via the liquid-discharge to remove the volume of water from a roof surface or other similar horizontal or substantially horizontal surface.