Aspects of the present invention relate to a vehicle control system, a vehicle, a method and a program configured to, in response to a signal indicative that at least the front of the vehicle is no longer substantially submerged in water, to operate a vehicle cooling fan in a reverse direction, optionally for a predetermined time period. The system may include sensors that determine the water level about the vehicle and automatically operate a vehicle cooling fan in a reverse direction based on said determined water level.

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 cooling unit for an agricultural vehicle has a grid for allowing air to enter the unit while limiting debris and a heat exchanger for transferring heat from a coolant to air passing across the heat exchanger. The cooling unit further has a duct with motor driven fan, and a controller to monitor fan current and operate the fan in alternating directions. The controller generates a heat exchanger blockage warning when desirable fan current thresholds are not achieved.

An agricultural vehicle including a fluid cooling system for cooling a component onboard the agricultural vehicle. The fluid cooling system including a housing with an air screen, and a cooling unit arranged within the housing, the cooling unit having a cooling fan with a rotational speed, and an aspiration system. The aspiration system being configured to clean debris from the air screen, and includes a wand, a suck-off fan and a controller. The wand and the air screen are arranged to move such that the wand, over a period of time, covers a substantial portion of the air screen. The suck-off fan suck air from the wand and has a rotational speed. The controller is in communication with the suck-off fan and the cooling fan, and is configured to coordinate an increase in the speed of the suck-off fan when the speed of the cooling fan decreases.

A fan assembly may include an input shaft, first and second belts, first and second pulleys engaged by the first belt, third and fourth pulleys engaged by the second belt, output shaft rotationally coupled to a fan, and a clutch assembly. The second pulley may be rotationally coupled to the first pulley via the first belt so as to rotate in the same direction as the first pulley. The fourth pulley may be rotationally coupled to the third pulley via the second belt so as to rotate in the opposite direction of the third pulley. The clutch assembly may be configured to selectively rotationally couple the output shaft to the input shaft via the first pulley, first belt, and second pulley. The clutch assembly may also be configured to selectively rotationally couple the output shaft to the input shaft via the third pulley, second belt, and fourth pulley.

A work vehicle includes a cooling fan that selectively and/or periodically runs in reverse in order to discharge accumulated dirt or debris from one or more coolers. The reverse activation of the fan is prevented from initiating when the operator of the running vehicle is outside the operator cab in the vicinity of the coolers. In an exemplary embodiment, activation of a parking brake interrupts or prevents reverse activation of the fan, though a fuel door sensor may also be used. A minimum engine speed may be specified to ensure adequate power for maximum fan power during the reverse operation.

An air-cooled internal combustion engine including a crankshaft, a cylinder, a blower assembly including a blower housing and a fan, and a static cover. The static cover includes a main body that is aligned with the crankshaft, an arm that extends from the main body and is aligned with the cylinder, and a plurality of air intake openings. A first subset of the air intake openings is formed through the main body and a second subset of the air intake openings is formed through the arm, and the static cover is configured to prevent user access to a moving component of the engine. The fan is configured to move air into the blower housing through the air intake openings.

A fan control system includes a fan, a dust barrier near the fan, a fan actuator to rotate the fan in a normal direction and a reverse direction, a fan controller configured or programmed to control a manner in which the fan actuator is driven, a clogging degree calculator configured or programmed to calculate a clogging degree of the dust barrier based on drive behavior of the fan, and a reverse rotation instructor configured or programmed to instruct the fan controller based on the clogging degree to rotate the fan in the reverse direction.

A work vehicle of the present invention includes an engine, a cooling core, a fan, a hydraulic drive unit, and an idle reduction execution unit. The cooling core is mounted in the work vehicle. The fan is configured to blow air to the cooling core and to be capable of making regular and reverse rotations. The hydraulic drive unit is configured to drive the fan by driving the engine. The idle reduction execution unit is configured to stop the engine based on a state of rotation of the fan caused by the hydraulic drive unit and based on an idle state. The idle reduction execution unit stops the engine on a condition that the fan makes regular rotation and the idle state has continued for a predetermined time, and does not stop the engine on a condition that the fan makes reverse rotation.

A method for operating a cooling fan of a vehicle including detecting at least one of a battery charge of a battery of the vehicle and a state of engagement of an air conditioning system of the vehicle and rotating the cooling fan in a direction to expel air from an engine compartment of the vehicle based on at least one of a detected battery charge of the battery or a detected state of engagement of the air conditioning system.