A fan control system for a variable pitch fan of a work vehicle includes 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 fan control system for a variable pitch fan of a work vehicle includes 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.

Apparatus for actuating and controlling the rotation, about their longitudinal axis (Y-Y), of blades (20) of cooling fans (10) for operating machines and/or vehicles, in particular agricultural tractors and off-road vehicles, said fan being mounted on a hub (11) which can be rotationally driven about its axis (X-X) by associated driving means (3,3a) suitable for connection to the heat engine (1) and mounted on a fixed support (5) by means of a bearing (3b) the apparatus comprising a ring (71) provided with a radial seat (71a) inside which a radial pin (72), eccentrically engaged in a base (73) integral with the shank (20a) of the blade (20), is inserted; an electric motor (30) which is coaxial with the axis (X-X) of the hub (11) and the shaft (31) of which is coaxially connected to a reduction gear (40), the kinematic output element (143) of which is coaxially connected by means of a screw (51a)/female thread (76a) coupling to a slider (76) displaceable in both directions along the axis (X-X) and kinematically connected to the ring (71) with an eccentric pin (72) driving the base (73) of the shank of the blade, an electromagnetic clutch (80; 180; 280) being arranged between the pulley (3) and the hub (11) of the fan.

Apparatus for actuating and controlling the rotation, about their longitudinal axis (Y-Y), of blades (20) of cooling fans (10) for operating machines and/or vehicles, in particular agricultural tractors and off-road vehicles, said fan being mounted on a hub (11) which can be rotationally driven about its axis (X-X) by associated driving means (3,3a) suitable for connection to the heat engine (1) and mounted on a fixed support (5) by means of a bearing (3b) the apparatus comprising a ring (71) provided with a radial seat (71a) inside which a radial pin (72), eccentrically engaged in a base (73) integral with the shank (20a) of the blade (20), is inserted; an electric motor (30) which is coaxial with the axis (X-X) of the hub (11) and the shaft (31) of which is coaxially connected to a reduction gear (40), the kinematic output element (143) of which is coaxially connected by means of a screw (51a)/female thread (76a) coupling to a slider (76) displaceable in both directions along the axis (X-X) and kinematically connected to the ring (71) with an eccentric pin (72) driving the base (73) of the shank of the blade, an electromagnetic clutch (80; 180; 280) being arranged between the pulley (3) and the hub (11) of the fan.

A control device for a vehicle includes a grille shutter ECU that is connected to a LIN communication line and controls driving of a grille shutter, and an engine ECU that is connected to the LIN communication line so as to be able to establish communication with the grille shutter ECU. In the case of detecting an abnormality in the communication, if a predetermine threshold time or more has elapsed since a start of the vehicle, and if cumulative time that a detection result of a vehicle speed sensor is equal to or more than a predetermined vehicle speed threshold value, is equal to or more than a cumulative threshold value, and a number of starts of the vehicle is equal to or more than a predetermined trip number, the engine ECU determines that the detected abnormality is a failure in the LIN communication.

A control device for a vehicle includes a grille shutter ECU that is connected to a LIN communication line and controls driving of a grille shutter, and an engine ECU that is connected to the LIN communication line so as to be able to establish communication with the grille shutter ECU. In the case of detecting an abnormality in the communication, if a predetermine threshold time or more has elapsed since a start of the vehicle, and if cumulative time that a detection result of a vehicle speed sensor is equal to or more than a predetermined vehicle speed threshold value, is equal to or more than a cumulative threshold value, and a number of starts of the vehicle is equal to or more than a predetermined trip number, the engine ECU determines that the detected abnormality is a failure in the LIN communication.

Embodiments relate to integrated circuits, systems and methods for combined sensing and heating functions in structures suitable for use in deicing, heating and other applications. In an embodiment, an integrated circuit is coupled to a heating element and configured to control operation of the heating element to provide heat as well as to utilize the heating element as at least part of a sensing structure to sense the presence of ice, water or air on or near the heating element. In embodiments, the heating element comprises a conductive polymer structure, and the presence of ice, water or air is sensed based on a capacitance, impedance or other spectroscopy of the structure sensed and analyzed by integrated circuitry coupled to the structure.

A working machine includes a fan to generate first and second airflows in different directions. The fan includes a central shaft, rotary blades each extending in a radial direction of the central shaft, and an angle change mechanism to change an angle of each rotary blade relative to the central shaft by turning the rotary blade about an axis in the radial direction. The angle change mechanism includes a movable body that is movable in an axial direction of the central shaft, and a conversion mechanism to convert movement of the movable body into turning movement of the rotary blades. The conversion mechanism includes inserts each inserted in the corresponding rotary blade in the corresponding radial direction, fastenings to fix the corresponding rotary blade and the corresponding insert together, and a turning mechanism to turn each insert about the corresponding axis as the movable body moves.

A working machine includes a fan to generate first and second airflows in different directions. The fan includes a central shaft, rotary blades each extending in a radial direction of the central shaft, and an angle change mechanism to change an angle of each rotary blade relative to the central shaft by turning the rotary blade about an axis in the radial direction. The angle change mechanism includes a movable body that is movable in an axial direction of the central shaft, and a conversion mechanism to convert movement of the movable body into turning movement of the rotary blades. The conversion mechanism includes inserts each inserted in the corresponding rotary blade in the corresponding radial direction, fastenings to fix the corresponding rotary blade and the corresponding insert together, and a turning mechanism to turn each insert about the corresponding axis as the movable body moves.