Abstract: A utility vehicle comprises a vehicle body frame to which the engine is mounted; a seat frame fastened to the vehicle body frame and including a seat bottom support member; and a seat bottom detachably fastened to the seat bottom support member; wherein a portion of an upper wall surface of an engine room in which the engine is disposed is defined by at least a portion of a lower surface of the seat bottom.

Abstract: A utility vehicle includes a seat mounted to a vehicle body frame to seat a passenger thereon; a side member positioned outward in a vehicle width direction relative to the seat and forming a part of the vehicle body frame; an access opening defined by the side member, the seat being accessible by the passenger through the access opening; a door rotatably mounted to the side member to open and close a part of the access opening; and a protective cover provided between the door and the side member and coupled to the door and to the side member; the protective cover being rotatable with respect to the side member along with the door and closing at least a part of a portion of the access opening, which portion is above the door, in a state where the door is closed.

Abstract: A utility vehicle comprises a vehicle body frame including a main frame including a floor member and a pair of right and left side members and a sub-frame for reinforcing the main frame, each of the side members includes a side pipe element, a first pillar pipe element, a second pillar pipe element and a third pillar pipe element, the sub-frame includes a first cross member provided between and coupled to second pillar pipe elements, one end portion of the first cross member is detachably coupled to one of the second pillar pipe elements and an opposite end portion of the first cross member is detachably attached to the other second pillar pipe element.

Abstract: A utility vehicle includes a seat mounted to a vehicle body frame to seat a passenger thereon; a side member positioned outward in a vehicle width direction relative to the seat and forming a part of the vehicle body frame; an access opening defined by the side member, the seat being accessible by the passenger through the access opening; a door rotatably mounted to the side member to open and close a part of the access opening; and a protective cover provided between the door and the side member and coupled to the door and to the side member; the protective cover being rotatable with respect to the side member along with the door and closing at least a part of a portion of the access opening, which portion is above the door, in a state where the door is closed.

Abstract: A utility vehicle comprises a vehicle body frame to which the engine is mounted; a seat frame fastened to the vehicle body frame and including a seat bottom support member; and a seat bottom detachably fastened to the seat bottom support member; wherein a portion of an upper wall surface of an engine room in which the engine is disposed is defined by at least a portion of a lower surface of the seat bottom.

Abstract: A utility vehicle includes a vehicle body; a seat provided on the vehicle body; a pair of right and left entrances through which a user to be seated on the seat gets into and out of the vehicle, the entrances being provided at both sides of the vehicle body in a vehicle width direction; and a pair of right and left doors for opening and closing the pair of right and left entrances, respectively; each of the pair of right and left doors including a door body closing at least a portion of a corresponding entrance and a hinge for coupling the door body to the vehicle body such that the door body is rotatable around the hinge; and the door body including a door component which is substantially symmetric in shape in a rightward and leftward direction.

Abstract: A utility vehicle comprises a vehicle body frame; a seat frame including a seat bottom support member and a seat backrest support member, at least the seat bottom support member and the seat backrest support member being formed by square pipes with rectangular cross-sections; a seat bottom fastened to the seat bottom support member; and a seat backrest fastened to the seat backrest support member; wherein the seat bottom support member and the seat backrest support member of the seat frame are integral with each other to have a bent portion; and the seat bottom support member of the seat frame is fastened to the vehicle body frame.

Abstract: A vehicle according to the present invention includes a front seat and a rear seat. The rear seat is changeable between an installed state in which the passenger can be seated and a retracted state in which the passenger is not seated and the rear seat is retracted. The vehicle includes an output control unit controlling the output of an engine, and detection means for detecting the installed state of the rear seat. When the detection means detects the installed state of the rear seat, the output control unit regulates the output of the engine as compared with the output when the detection means does not detect the installed state of the rear seat.

Abstract: According to the present invention, an output control unit of a vehicle having a front riding space and a rear riding space, includes: riding detection means for detecting the riding of the passenger in the rear riding space; wherein when the riding detection means detects the riding of the passenger, the output control unit regulates the output of the engine of the vehicle as compared with the output when the riding detection means does not detect the riding of the passenger.

Abstract: An electric power assist device can be compactly disposed with ease in an electric power steering system for a vehicle. The electric power steering system for a vehicle includes: a steering wheel; a steering column incorporating therein a steering shaft connected to the steering wheel and extending downward to the front; and an electric power assist device for assisting a steering torque of the steering wheel. Here, an input shaft and an output shaft of the electric power assist device are connected to the lower end of the steering shaft and the input shaft of the steering gear device, respectively, via universal joints.

Abstract: An electric power assist device can be compactly disposed with ease in an electric power steering system for a vehicle. The electric power steering system for a vehicle comprises: a steering wheel; a steering column incorporating therein a steering shaft connected to the steering wheel and extending downward to the front; and an electric power assist device for assisting a steering torque of the steering wheel. Here, an input shaft and an output shaft of the electric power assist device are connected to the lower end of the steering shaft and the input shaft of the steering gear device, respectively, via universal joints.

Abstract: A four-wheel-drive vehicle includes: a body frame; a swing unit including a power unit, and a rear axle connected to the power unit so as to be driven by the power unit, the swing unit being supported on the body frame for vertical swing motion; a front reduction gear for transmitting power to front wheels; and a front propeller shaft connecting the power unit to the front reduction gear for power transmission.

Abstract: A four-wheel-drive vehicle includes: a body frame; a swing unit including a power unit, and a rear axle connected to the power unit so as to be driven by the power unit, the swing unit being supported on the body frame for vertical swing motion; a front reduction gear for transmitting power to front wheels; and a front propeller shaft connecting the power unit to the front reduction gear for power transmission.

Abstract: The invention relates to a brake system for reducing the number of brake parts, a brake installing space and a vehicle width, and for facilitating an adjustment operation of equalizing the left and right braking forces. Rotary friction plates for braking a differential case and an axle are supported on the differential case and the axle respectively, while stationary friction plates are arranged axially and alternately with respect to the rotary friction plates and are supported non-rotatably on a gear case to brake the differential case and the axle at once by the operation of a single operating arm. A brake housing is integrally formed in an end wall of the gear case. The end wall, through which the axle passes, has an opening from which the brake members can be removed and inserted to improve assembly efficiency.

Abstract: A belt-type automatic transmission wherein the engine brake can automatically work when a vehicle runs on a downward slope, comprising a pair of sheaves 21 provided on a driving shaft 20, the pair of sheaves 21 having a fixed sheave 22 and a movable sheave 23 which is caused to approach the fixed sheave 22 by the force which is increased with a revolution speed, a pair of sheaves 31 provided on a driven shaft 30, the pair of sheaves 31 having a fixed sheave 32 and a movable sheave 33 which is caused to approach the fixed sheave 32 by elastic force, a V belt 28 mounted around the pairs of sheaves 21 and 31, wherein the maximum opening between the sheaves 21 on the driving shaft 20 is restricted so as not to loosen the V belt 28, a clutch 15 for starting movement provided between an engine 1 and the driving shaft 20, and shift-up prevention means 40 for automatically giving the force for the movable sheave 33 to approach the fixed sheave 32 when revolving torque is transmitted from the driven shaft 30 to the pa

Abstract: An oil pump control lever 3 is spring biased toward the fully open or maximum supply position 3b to implement fail-safe engine operation if the control wire 4 for the lever is cut or loosened. The far end of the wire 4 is connected to a handlebar throttle control lever 8 on the opposite side of its pivot point 10 from the connection of a throttle control wire 7, and the torque applied to the throttle control lever by the throttle control wire exceeds that applied by the oil supply control wire.