To suppress cooling performance from being degraded by bubbles in a coolant in a cooling system for an electric drive vehicle, the cooling system includes: a first coolant circuit through which the coolant for cooling an electric motor and electrical equipment circulates; a first pump that is connected to the first coolant circuit and feeds the coolant; and a first degas tank that is connected to the first coolant circuit and separates the bubbles from the coolant. The first coolant circuit connects the electric motor, the electrical equipment, the first pump, and the first degas tank in series. The first pump and the electric motor are connected in a manner to be sequentially aligned in the first coolant circuit. The coolant flows from the first pump to the electric motor.

To suppress cooling performance from being degraded by bubbles in a coolant in a cooling system for an electric drive vehicle, the cooling system includes: a first coolant circuit through which the coolant for cooling an electric motor and electrical equipment circulates; a first pump that is connected to the first coolant circuit and feeds the coolant; and a first degas tank that is connected to the first coolant circuit and separates the bubbles from the coolant. The first coolant circuit connects the electric motor, the electrical equipment, the first pump, and the first degas tank in series. The first pump and the electric motor are connected in a manner to be sequentially aligned in the first coolant circuit. The coolant flows from the first pump to the electric motor.

A pipe connection portion of a damper case has an opening opened toward the rear side. In an end surface around the opening in the pipe connection portion, a recess is formed in an inner diameter portion. The recess is recessed to the front side as compared to another portion of the end surface. In an end surface of a pipe member, a groove portion is formed in an outer diameter portion. The groove portion is recessed to the rear side as compared to another portion of the end surface. A first seal member and a second seal member are interposed between the end surface of the damper case and the end surface of the pipe member, and the damper case and the pipe member are sealed by the seal members in a liquid-tight manner.

A pipe connection portion of a damper case has an opening opened toward the rear side. In an end surface around the opening in the pipe connection portion, a recess is formed in an inner diameter portion. The recess is recessed to the front side as compared to another portion of the end surface. In an end surface of a pipe member, a groove portion is formed in an outer diameter portion. The groove portion is recessed to the rear side as compared to another portion of the end surface. A first seal member and a second seal member are interposed between the end surface of the damper case and the end surface of the pipe member, and the damper case and the pipe member are sealed by the seal members in a liquid-tight manner.

A vehicle radiator air intake screen maintenance system comprising a radiator fan, a fan motor; and a processor operable to control the rotational speed and direction of the radiator fan to: periodically implement a drop cycle whereby a radiator cooling air flow generated by the fan rotating in a forward direction is slowed such debris collected on a radiator air intake screen of the vehicle is caused to fall off due to gravitational force; and periodically implement a full reverse cycle where a rotational direction of the fan is reversed and an expulsion air flow is generated whereby debris collected on vehicle radiator and the air intake screen will be blown off, whereafter reverse rotation of the fan is stopped and the fan is returned to the full forward operating speed and direction.

A method, system, and apparatus are provided for optimizing control of the rotational speed of a fan in a vehicle so as to reduce the aerodynamic drag of a vehicle in a given operating parameter, and accordingly, to improve fuel efficiency of operation of the vehicle. Certain exemplary embodiments include determining an optimized speed of rotation of a cooling fan of the vehicle for reducing overall fuel demand in given operating conditions, and controlling rotation speed of the fan at the optimized speed in order to minimize fueling demand of a prime mover of the vehicle.

The invention concerns a device (12) for controlling an air flow (F) circulating in a first heat exchanger (4) for a motor vehicle comprising at least two screens (14), the control device (12) being configured to go from a closed configuration in which the screens (14) obstruct the passage of the air flow (F) completely to an open configuration in which the screens (14) are positioned in such a manner as to allow the air flow (F) to pass with a maximum flow rate, and any intermediate configuration. According to the invention, the two screens (14) are adapted to be moved away from one another when the control device (12) goes from the closed configuration to the open configuration and to be moved toward one another when the control device (12) goes from the open configuration to the closed configuration.

A flap position sensing device of an active air flap system, and a method of manufacturing the same are described. The flap position sensing device includes a rotating body, a sensor casing, a first hall sensor and a second hall sensor, and a first permanent magnet and a second permanent magnet. The rotating body is formed of a resin material, and rotates the flap by receiving torque while the rotating body is coaxially fixed to a rotation shaft of the flap. The sensor casing is formed of a resin material, and is fixed to the housing to rotatably support the rotating body. The first hall sensor and the second hall sensor are integrally formed with the sensor casing by injection molding, and are disposed corresponding to an open position and a closed position, respectively, of the flap.

A utility vehicle includes a plurality of ground-engaging members, a frame supported by the ground-engaging members, and a plurality of body panels supported by the frame. The utility vehicle also includes a radiator supported on a rear portion of the frame. Additionally, the utility vehicle includes an air intake assembly partially supported by an upper portion of the frame.

A forestry machine includes a ground propulsion apparatus, a chassis supported by the ground propulsion apparatus, a cab, an engine and a work implement. The chassis includes a front chassis portion and a rear chassis portion. The front chassis portion includes an upper portion and a lower portion. The rear chassis portion has a wood basket supported thereon. The cab is rotatably supported on the front chassis portion by a rotatable connection about a cab rotation axis to be selectively rotated 360 degrees. The engine is integrated into the front chassis portion. At least a part of the engine is disposed below an upper most surface of the upper portion. The work implement is movably attached to the cab. The work implement includes a boom movably attached to the cab, an arm movably attached to the boom, and a work tool attached to the arm.