Ventilation system for a vehicle and off-road vehicle including same

A ventilation system for a vehicle comprising:

• an air duct that includes an inlet facing a first direction and an outlet facing a second direction that is different from the first direction, the air duct is configured to receive air along the first direction and redirect air flowing through the air duct to exit the air duct in the second direction such that air, from outside the vehicle, enters the vehicle;
• and
• an attachment member connected to the air duct at a position between the inlet and outlet, the attachment member is configured to selectively attach the air duct to and detach the air duct from the vehicle, wherein
• the air duct includes,
• a first air duct member that includes the inlet, a first outer wall, and a first opening,
• a second air duct member that includes the outlet, a second outer wall, and a second opening,
• a hinge assembly that connects the first air duct member to the second air duct member such that the first duct member pivots between a first position and a second position, the first opening and the second opening are in fluid communication with each other when the first duct member is in the first position, and the fluid communication between first opening and the second opening is terminated when the first duct member is in the second position, in the first position, the first outer wall and the second outer wall are coplanar and in the second position the first outer wall and the second outer wall face toward each other, and
• the hinge assembly includes,
• a hinge pin connected to each of the first air duct member and the second air duct member, and
• a spring connected to each of the first and second air duct members such that the spring biases the first air duct member toward the first position.

An off-road vehicle comprising:

• a frame assembly;
• a plurality of wheels rotatably supported on the frame assembly;
• a roll overprotection system that includes a plurality of cage members and is mounted to the frame assembly, and the roll overprotection system defines a passenger space and a windshield frame, the plurality of cage members includes a first cage member having a predetermined dimension;
• a windshield connected to the windshield frame;
• and
• an air duct that selectively attaches and detaches from one of the cage members, the air duct includes an inlet outside of the windshield, an outlet that faces toward the passenger space, and a wall that extends from the inlet to the outlet;
• and
• an attachment member connected to the wall of the air duct, the attachment member includes,
• a base connected to the wall of the air duct,
• an attachment wall that extends away from the base and terminates at a free end, the free end is spaced away from the wall of the air duct to form a gap between the wall and the free end that has a predetermined distance that is smaller than a predetermined dimension of the one of the cage members, and
• the attachment wall has a curved inner surface with a predetermined diameter, and the predetermined diameter is greater than the predetermined distance,
• the attachment wall includes a curved outer surface having a predetermined first curvature and the curved inner surface having a predetermined second curvature that is different from the predetermined first curvature,
• each of the curved inner surface and the curved outer surface is a cylindrical surface, and
• the curved inner surface has a first center of curvature and the curved outer surface has a second center of curvature that is different from the first center of curvature.