Patent application number | Description | Published |
20090205734 | OIL PASSAGE FORMING MEMBER FITTED WITH HYDRAULIC PRESSURE SENSOR - Detecting a hydraulic pressure condition at a supplied part while reducing the cost of an oil passage forming member provided with an oil passage for conducting oil to the supplied part. In a right cover which is provided with a bent oil passage for conducting oil to a hydraulic type running clutch and which is fitted with the hydraulic pressure sensor, the oil passage is composed of a first hole and a second hole intersecting the first hole so as to constitute a bent passage part. The second hole, which is one of the first hole and the second hole, has an aperture end part with the aperture end part being closed with the hydraulic pressure sensor. The bent passage part is a bent passage part, located at a position nearest to a hydraulic pressure chamber of the running clutch, of the oil passage. | 08-20-2009 |
20090205902 | SOUND INSULATION STRUCTURE WITH RESONATOR - To enhance the noise reducing effect of a sound insulation structure which includes a cover member for covering a power unit from the outside so as to reduce the radiant sound generated from the power unit, and a resonator. A sound insulation structure includes an armor cover for covering a left case half and a left cover constituting a side part cover of the power unit from the left side so as to reduce the radiant sound generated from the side part cover and enhance an appearance quality of the power unit, and the resonator capable of resonating at a specified frequency of the radiant sound. The resonator is disposed in a space formed between the side part cover and the armor cover in the state of being out of contact with the armor cover, and is attached to the side part cover in contact with the latter. | 08-20-2009 |
20090205919 | VEHICLE PROVIDED WITH TORQUE DAMPER - A torque shock or vibrations caused by the rotary inertia of a hydrostatic continuously variable transmission is reduced to improve ride quality of a vehicle when excessive torque occurs in a torque transmission path between a crankshaft and a drive wheel. A motorcycle includes a hydrostatic continuously variable transmission rotatably driven by torque of a crankshaft of an internal combustion engine. A rear wheel is rotatably driven by torque from the transmission. A torque damper absorbs excessive torque occurring in a torque transmission path from the crankshaft to the rear wheel. The torque dampers include an input side torque damper disposed in an input side torque transmission path between the crank shaft and the transmission and an output side torque damper disposed in an output side torque transmission path between the transmission and the rear wheel. | 08-20-2009 |
20090205920 | VEHICLE PROVIDED WITH TORQUE DAMPER - A torque damper for a power unit includes a rotating shaft on which the torque damper is mounted to reduce the axial size and weight. A torque damper for absorbing excessive torque occurring in a torque transmission path between an output shaft of a running clutch and an intermediate shaft includes an input cam member adapted to receive torque of the output shaft and an output cam member. A driven gear adapted to apply torque of the output shaft to the input cam member is provided on the input cam member rotatably supported by the intermediate shaft. In the torque damper, a torque-absorbing portion for absorbing excessive torque includes an input cam portion of the input cam member and an output cam portion of the output cam member and is disposed between a pair of bearings. One bearing is disposed between the input cam portion and the driven gear. | 08-20-2009 |
20100242872 | FUEL FEEDING DEVICE OF A V-SHAPED ENGINE FOR MOTORCYCLE - A motorcycle mounted with a V-shaped engine in which a front bank and a rear bank are disposed like a V-shape and a fuel pump for fuel injection is mounted. The fuel pump is driven by a camshaft of a cylinder head, and mounted on the upside of the cylinder head. The fuel pump is fitted is the cylinder head of the front bank at the back of a head pipe. A fuel chamber is provided between the fuel pump an the injectors, the fuel chamber is disposed lengthways in the vertical direction in the V-bank space K, and a lower end part is disposed facing the sides of the injectors, and connection to the injectors by fuel pipes extending from the lower end part substantially horizontally. With this configuration, the fuel pump does not obstruct other components in the motorcycle, and is protected without a special cover. | 09-30-2010 |
20100242875 | VALVE GEAR FOR INTERNAL COMBUSTION ENGINES - A valve gear for an internal combustion engine having a sub-rocker arm return spring that is shortened in a longitudinal length of a cylinder. The valve gear for the internal combustion engine is provided with a camshaft, an intake cam turning integrally with the camshaft, a valve cam for opening and closing an engine valve, a link mechanism for transmitting a valve driving force to the valve cam, a holder for supporting a sub-rocker arm support and a driving mechanism for varying a fulcrum position of the link mechanism. A valve operating characteristic can be varied with an oscillating position of the sub-rocker arm support. A sub-rocker arm is provided with a roller, an eccentrically disposed step and a link section. The step is provided with a spring socket, and a return spring is arranged intervening between the spring socket and the holder. | 09-30-2010 |
20100242882 | VALVE MOTION FOR AN INTERNAL COMBUSTION ENGINE - A valve motion for an internal combustion engine which suppresses the height of the internal combustion engine low. In a valve motion for an internal combustion engine, a driving mechanism includes a ball screw disposed over an intake side camshaft and an exhaust side camshaft and having threaded portions provided thereon which are threaded in different directions from each other on the intake side and the exhaust side. Sliders are individually provided on the intake side and exhaust side and movable on the ball screw with connecting link members provided between the sliders and a holder member. | 09-30-2010 |
20100242903 | INLET PASSAGE STRUCTURE OF V-TYPE INTERNAL COMBUSTION ENGINE - In the inlet passage structure of the V-type internal combustion engine, front and rear banks have inlet ports with a nearly identical inlet passage length, and an inlet chamber is connected to a top end openings of the inlet ports. A throttle body and the inlet chamber are offset on a side leading to a cylinder on a side away from the throttle body. The inside of the inlet chamber is formed with a nearly straight inlet passage from the throttle body to the top end opening of the inlet port leading to the cylinder bore on the side away from the throttle body, and a curved inlet passage to the top end opening of the inlet port leading to the cylinder on a close side. | 09-30-2010 |
20110023803 | VALVE TRAIN OF INTERNAL COMBUSTION ENGINE - A valve train of an internal combustion engine having a swing of a link mechanism that is stabilized to stabilize the operating characteristics of an engine valve. A camshaft is provided together with a valve operating cam pivotally supported by the camshaft so as to operatively open and close an engine valve. A link mechanism allows a drive cam rotated integrally with the camshaft to swing the valve operating cam, and a drive mechanism swings the link mechanism, wherein opening and closing of the engine valve are started in a buffer section of the valve operating cam, and opening/closing timing of the engine valve is controlled by the drive mechanism swinging the valve operating cam via the link mechanism, without the provision of a buffer transition section and a buffer constant-speed section encountered at the time of transiting from a base circle to a cam lobe of the drive cam. | 02-03-2011 |
20110155083 | ADJUSTABLE VALVE TRAIN FOR AN INTERNAL COMBUSTION ENGINE, AND ENGINE AND MOTORCYCLE INCORPORATING SAME - A valve train for an internal combustion engine includes a camshaft, a valve-operating cam for operating an engine valve, and a link mechanism for swinging the valve-operating cam. The valve train also includes a holder member operable to turn around the camshaft, and a drive mechanism operable to turn the holder member for varying positions of the link mechanism. The drive mechanism includes a ball screw provided perpendicularly to the camshaft, a slider threadably engaged with the ball screw, an arm member swingably attached to the slider, and a connecting bolt having one end secured to an arm-connecting portion of the arm member, and the other end secured to the holder member. In such movable valve train for an internal combustion engine, the holder member and the drive mechanism are connected to each other with a small and lightweight configuration, requiring a minimal number of parts. | 06-30-2011 |
20110156728 | ROTATION ANGLE SENSING ASSEMBLY INCLUDING ATTACHING STRUCTURE, VARIABLE VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINE USING THE ATTACHING STRUCTURE, AND VEHICLE INCORPORATING THE SAME - In a rotation angle sensor attaching structure for detecting rotation of a rotational angle detection object shaft through a reduction gear, an outer race of a bearing is force fitted in and secured to a central portion of the reduction gear, and an inner race of the bearing is secured to a supporting wall by a supporting bolt. A sensor-connecting element of a rotation angle sensor, which extends across a head portion of the supporting bolt, is secured integrally to an outer side face of the reduction gear. Such arrangement achieves a minimal size of the rotation angle sensor attaching structure. | 06-30-2011 |