Abstract: A charge pipe passage includes: a first engine-side pipe passage part which extends vertically; a second engine-side pipe passage part which is connected to a lower end of the first engine-side pipe passage part on one side in the vehicle widthwise direction and extends from one side to the other side in the vehicle widthwise direction above the engine body; and a third engine-side pipe passage part which is communicably connected to the second engine-side pipe passage part on the other side in the vehicle widthwise direction and is connected to the engine body, and at least a part of the charge pipe passage between a frame-side support part and an engine-side support part is formed of an elastic tube.

Abstract: There is provided a vaporized fuel control device for a straddle type vehicle that can prevent a situation that liquid fuel in a fuel tank flows into an engine and a situation that oil in the engine flows into the fuel tank while adapting the vaporized fuel control device to the layout of the straddle vehicle. A vaporized fuel passage 110 is disposed so as to have an uppermost portion X at some position thereof between the fuel tank 35 and the engine E, and the uppermost portion X is disposed at a higher position than the fuel upper limit level of the fuel tank 35, the oil upper limit level in the engine E and a footrest portion 44.

Abstract: A charge pipe passage includes a first tank-side pipe passage part which is connected to an upper surface of a fuel tank, and a second tank-side pipe passage part which is connected with the first tank-side pipe passage part and extends toward the other side of the fuel tank from one side of the fuel tank in the vehicle widthwise direction on an end portion thereof on a fuel tank side, and the first and second tank-side pipe passage parts, are fixed to the upper surface of the fuel tank.

Abstract: There is provided an evaporated fuel control device for a saddle-type vehicle in which an air supply passage is laid out without being disposed at a higher position than a fuel tank. The fuel tank 12 is disposed at a higher position than the engine 20, an evaporated fuel passage 110 is routed as a descending passage from the fuel tank 12 to the engine 20, and an air supply passage 120 is jointed to a halfway position of the evaporated fuel passage 110 which is located at a fuel tank 12 side with respect to a first check valve 117 and positionally lower than the uppermost portion of the fuel tank 12.

Abstract: A charge pipe passage includes a second pipe passage part which is connected to a fuel tank by way of a first pipe passage part and extends toward the other side from one side in the vehicle widthwise direction, and a third pipe passage part which is communicably connected with the second pipe passage part on the other side in the vehicle widthwise direction and has a highest part arranged at a highest position of the charge pipe passage at an intermediate position thereof. A first check valve is interposed on the third pipe passage part downstream of the highest part, an atmospheric air introducing pipe passage is connected to the third pipe passage part upstream of the first check valve, and a second check valve is interposed on the atmospheric air introducing pipe passage at a position higher than the highest part.

Abstract: A saddle-type vehicle is provided with: a seat on which a driver sits; a fuel tank positioned in front of the seat; an engine positioned below the fuel tank and having a crankcase and a cylinder projecting upward from a front of the crankcase; and a fuel vapor passage that is connected to the fuel tank and emits evaporated fuel in the fuel tank to an outside of the fuel tank. At least a part of the fuel vapor passage passes behind the cylinder. The fuel vapor passage is connected to the crankcase mat a portion in a rear side of the cylinder and opens toward oil in the engine.

Abstract: A saddle-type vehicle is provided with: a seat on which a driver sits; a fuel tank positioned in front of the seat; an engine positioned below the fuel tank and having a crankcase and a cylinder projecting upward from a front of the crankcase; and a fuel vapor passage that is connected to the fuel tank and emits evaporated fuel in the fuel tank to an outside of the fuel tank. At least a part of the fuel vapor passage passes behind the cylinder. The fuel vapor passage is connected to the crankcase at a portion in a rear side of the cylinder and opens toward oil in the engine.

Abstract: There is provided a vaporized fuel control device for a straddle type vehicle that can prevent a situation that liquid fuel in a fuel tank flows into an engine and a situation that oil in the engine flows into the fuel tank while adapting the vaporized fuel control device to the layout of the straddle vehicle. A vaporized fuel passage 110 is disposed so as to have an uppermost portion X at some position thereof between the fuel tank 35 and the engine E, and the uppermost portion X is disposed at a higher position than the fuel upper limit level of the fuel tank 35, the oil upper limit level in the engine E and a footrest portion 44.

Abstract: There is provided an evaporated fuel control device for a saddle-type vehicle in which an air supply passage is laid out without being disposed at a higher position than a fuel tank. The fuel tank 12 is disposed at a higher position than the engine 20, an evaporated fuel passage 110 is routed as a descending passage from the fuel tank 12 to the engine 20, and an air supply passage 120 is jointed to a halfway position of the evaporated fuel passage 110 which is located at a fuel tank 12 side with respect to a first check valve 117 and positionally lower than the uppermost portion of the fuel tank 12.

Abstract: A charge pipe passage includes: a first engine-side pipe passage part which extends vertically; a second engine-side pipe passage part which is connected to a lower end of the first engine-side pipe passage part on one side in the vehicle widthwise direction and extends from one side to the other side in the vehicle widthwise direction above the engine body; and a third engine-side pipe passage part which is communicably connected to the second engine-side pipe passage part on the other side in the vehicle widthwise direction and is connected to the engine body, and at least a part of the charge pipe passage between a frame-side support part and an engine-side support part is formed of an elastic tube.

Abstract: A charge pipe passage includes a second pipe passage part which is connected to a fuel tank by way of a first pipe passage part and extends toward the other side from one side in the vehicle widthwise direction, and a third pipe passage part which is communicably connected with the second pipe passage part on the other side in the vehicle widthwise direction and has a highest part arranged at a highest position of the charge pipe passage at an intermediate position thereof. A first check valve is interposed on the third pipe passage part downstream of the highest part, an atmospheric air introducing pipe passage is connected to the third pipe passage part upstream of the first check valve, and a second check valve is interposed on the atmospheric air introducing pipe passage at a position higher than the highest part.

Abstract: A charge pipe passage includes a first tank-side pipe passage part which is connected to an upper surface of a fuel tank, and a second tank-side pipe passage part which is connected with the first tank-side pipe passage part and extends toward the other side of the fuel tank from one side of the fuel tank in the vehicle widthwise direction on an end portion thereof on a fuel tank side, and the first and second tank-side pipe passage parts, are fixed to the upper surface of the fuel tank.

Abstract: In a motorcycle, the vehicle body frame includes main frames which are inclined rearwardly and downwardly directly towards a rear portion of a vehicle body from a head pipe with the engine being arranged close to an inclined portion of the vehicle body frame and the fuel injection device is overlapped to the main frames. In a fuel injection type engine including a cylinder head, a throttle body has an intake passage leading to an intake port and a fuel injection valve which injects fuel towards the intake port, the throttle body can be arranged close to a cylinder head and, at the same time, the fuel injection valve can be cooled effectively. A connecting sleeve portion projects further outwardly relative to a joint portion of a cylinder head and a head cover and forms an inlet portion of an intake port that is integrally formed with the cylinder head.

Abstract: A fuel injection control apparatus is capable of supplying a proper amount of fuel by improving response when the throttle position is abruptly changed. The fuel injection control apparatus includes an electronic control unit for determining a fuel injection time period for a fuel injection system, based on the engine speed and the throttle position. The electronic control unit is operable to determine a base fuel injection time period based on engine speed and throttle position to start fuel injection, and adjusts the initial fuel injection time period thereafter, based on changes in the engine speed and the throttle position.

Abstract: A fuel injection control apparatus is capable of supplying a proper amount of fuel by improving response when the throttle position is abruptly changed. The fuel injection control apparatus includes an electronic control unit for determining a fuel injection time period for a fuel injection system, based on the engine speed and the throttle position. The electronic control unit is operable to determine a base fuel injection time period based on engine speed and throttle position to start fuel injection, and adjusts the initial fuel injection time period thereafter, based on changes in the engine speed and the throttle position.

Abstract: In a motorcycle, the vehicle body frame includes main frames which are inclined rearwardly and downwardly directly towards a rear portion of a vehicle body from a head pipe with the engine being arranged close to an inclined portion of the vehicle body frame and the fuel injection device is overlapped to the main frames. In a fuel injection type engine including a cylinder head, a, throttle body has an intake passage leading to an intake port and a fuel injection valve which injects fuel towards the intake port, the throttle body can be arranged close to a cylinder head and, at the same time, the fuel injection valve can be cooled effectively. A connecting sleeve portion projects further outwardly relative to a joint portion of a cylinder head and a head cover and forms an inlet portion of an intake port that is integrally formed with the cylinder head.