A vehicle cooling system includes a first fan assembly, a second fan assembly, and a control unit. The first fan assembly generates a main cooling flow acting upon a first cooler arrangement. The second fan assembly generates a secondary cooling flow adjacent to the main cooling flow and acting upon a second cooler arrangement. The secondary cooling flow is branched off from the main cooling flow via the second fan assembly. The main and secondary cooling flows pass through a filter element located upstream of the first and second fan assemblies and the first and second cooler arrangements. The control unit is configured to determine an actual value of a rotational speed variable of the second fan assembly, compare the actual value with a desired value specified for a cleaned state of the filter element, and generate a trigger signal to initiate a reversing operation of the first fan assembly.

A method for cleaning an air duct, in particular an air duct of a rail vehicle. The need to cool at least one load connected to the air duct is determined, the need to clean the air duct is determined, and a cleaning process of the air duct is initiated if there is no or a low need to cool the at least one load connected to the air duct and if there is a need to clean the air duct. There is also described an air intake system.

The technology disclosed herein relates to a grounds maintenance vehicle. The grounds maintenance vehicle has an engine and an engine shroud defining a cooling volume around the engine. The shroud defines a shroud intake. An engine oil conduit extends from the engine and a heat exchanger is coupled to the engine oil conduit.

A method of operating a fan for an air-cooled internal combustion engine includes starting the air-cooled internal combustion engine, operating the fan in a first operating mode in which the fan rotates in a first direction, and operating the fan in a second operating mode in which the fan rotates in a second direction.

A method of operating a fan for an air-cooled internal combustion engine includes starting the air-cooled internal combustion engine, operating the fan in a first operating mode in which the fan rotates in a first direction, and operating the fan in a second operating mode in which the fan rotates in a second direction.

Systems and methods for water management in a vehicle using a fluid management assembly are disclosed. The fluid management assembly includes a housing in fluid communication at one end with a vent in the hood of the vehicle and at a second end with a radiator of the vehicle. Air flow from the radiator is directed to the vent, and water and other liquids entering the vent are diverted away from the radiator via a drainage spout extending from a bottom side of the fluid duct assembly.

Systems and methods for water management in a vehicle using a fluid management assembly are disclosed. The fluid management assembly includes a housing in fluid communication at one end with a vent in the hood of the vehicle and at a second end with a radiator of the vehicle. Air flow from the radiator is directed to the vent, and water and other liquids entering the vent are diverted away from the radiator via a drainage spout extending from a bottom side of the fluid duct assembly.

Certain exemplary embodiments can provide a system comprising a pressurized air source, a pressure regulator, an air flow control solenoid valve, a wastegate assembly, a reservoir assembly, a filter, a coolant flow control solenoid valve, a mixer assembly, and an outlet assembly. The pressure regulator is constructed to control a pressure of air from the air source. The wastegate assembly is constructed to control air pressure in the reservoir assembly. The filter is constructed to remove impurities from a coolant stream.

Certain exemplary embodiments can provide a system comprising a pressurized air source, a pressure regulator, an air flow control solenoid valve, a wastegate assembly, a reservoir assembly, a filter, a coolant flow control solenoid valve, a mixer assembly, and an outlet assembly. The pressure regulator is constructed to control a pressure of air from the air source. The wastegate assembly is constructed to control air pressure in the reservoir assembly. The filter is constructed to remove impurities from a coolant stream.

A construction machine is capable of reducing a decrease in work efficiency due to maintenance for capturing dust. The construction machine includes: an engine; a heat exchanger; a cooling fan that sucks air into an engine chamber to pass the air through the heat exchanger; an intake chamber independent of the engine chamber; an intake tube connected to the intake chamber; and a dust receiving part. The intake tube has a curved part, which has an outside inner wall surface allowing dust in the air to contact it. The dust receiving part is located downstream of the outside inner wall surface to be capable of receiving dust.