Patent application number | Description | Published |
20120070317 | OIL PUMP UNIT WITH VARIABLE FLOW RATE - An oil pump unit with a variable flow rate includes: an oil pump having an intake port and a discharge port and accommodating a pump rotor; and an oil path switching valve having oil inlets and oil outlets and opening/closing oil pressure return holes communicating with the discharge port, in which the oil path switching valve and the oil pump are separately disposed, the intake port and the discharge port are open to valve-mounting surfaces formed at the oil pump, and oil inlets and the oil outlet are open to body-mounting surfaces matching with the valve-mounting surfaces of the oil path switching valve. | 03-22-2012 |
20120070318 | OIL PUMP UNIT WITH VARIABLE FLOW RATE - An oil pump unit with a variable flow rate includes lubrication pumps and a control pump that are driven by rotation of a crankshaft of an engine, and changes an oil supply amount from the control pump to each part of the engine, in which the control pump includes a plurality of oil pumps that have different discharge rates. | 03-22-2012 |
20120247254 | SHIFT ACTUATOR LAYOUT STRUCTURE IN VEHICLE - In a vehicle having a generator cover mounted on one side of a crankcase so as to cover an end portion of a crankshaft projecting from the crankcase and a shift spindle located on the rear side of the generator cover as an input member of a shifting mechanism, a shift actuator is located below the longitudinal range of the generator cover in parallel to the crankshaft and on the front side of the axis of the shift spindle. | 10-04-2012 |
20120247904 | INTERNAL COMBUSTION ENGINE AND SUPPLYING OIL PATH STRUCTURE FOR HYDRAULIC CLUTCH IN INTERNAL COMBUSTION ENGINE - An internal combustion engine is provided with a plurality of hydraulic clutches, a plurality of hydraulic controlling valves for individually controlling the oil pressure for the hydraulic clutches, and a plurality of clutch oil pressure sensors for individually detecting the controlling oil pressure of controlling oil supplying paths interconnecting the hydraulic controlling valves and the hydraulic clutches. The oil pressure sensors individually correspond to the hydraulic clutches compactly, thereby to preventing an increase in size. The clutch oil pressure sensors are provided on an engine main body so as to be disposed in the proximity of and in parallel to each other while axial directions thereof are directed in a forward and backward direction of a saddle type vehicle in a state in which the engine main body is mounted on the saddle type vehicle. | 10-04-2012 |
20130037372 | HYDRAULIC CLUTCH CONTROL DEVICE OF VEHICLE POWER UNIT - A hydraulic clutch control device of a vehicle power unit in which the oil pressure control valve is prevented from being exposed above the oil level even when a vehicle body inclines frontward or rearward. A housing chamber housing an actuator is formed in a housing chamber forming body attached to an engine main body and an oil pressure control valve partially facing the housing chamber is supported by the housing chamber forming body. An oil return hole used to return excess hydraulic oil from the housing chamber into the engine main body is provided in the housing chamber forming body to communicate with an upper portion of the housing chamber at an end portion of the housing chamber on a side close to the oil pressure control valve. | 02-14-2013 |
20140083228 | SHIFT DRUM STRUCTURE FOR DRUM-TYPE TRANSMISSION - A shift drum structure for a drum-type transmission in which a shift fork moving on a shift fork shaft in an axial direction while guided by a guide groove in response to a turn of a shift drum, changes speeds by sliding a shifter member on a transmission driving shaft pivotally supporting a transmission gear, the shift drum. The shift drum includes a cylindrical drum main body and drum spindles projecting outward from drum end walls on the respective two sides of the drum main body, and the guide groove formed in an outer peripheral surface of the drum main body in a circumferential direction, wherein in the shift drum, a work groove is formed in the outer peripheral surface of the drum main body from one end surface to an opposite end surface of the drum main body, or to the guide groove near the opposite end surface. | 03-27-2014 |
20140290408 | VIBRATION ISOLATING STRUCTURE FOR POWER UNIT - A vibration isolating structure for a power unit. The power unit includes an internal combustion engine equipped with transmissions. The vibration isolation structure includes torque dampers disposed between transmission gears of the transmission and a power transmission shaft supporting the transmission gears. | 10-02-2014 |
20140290431 | VEHICLE DRIVING FORCE TRANSMISSION STRUCTURE - The vehicle driving force transmission structure of a power unit can include a main transmission having a transmission shaft group and parallel to a crankshaft and provided in a crankcase on the side of the crankshaft. The transmission structure can also include a large rotational body provided at an end of the crankshaft, and an auxiliary transmission provided as a separate body from and connecting to the main transmission. The auxiliary transmission has a transmission shaft group parallel to the transmission shaft group of the main transmission and disposed so as to form a periphery of the large rotational body. The auxiliary transmission includes a transmission driving mechanism disposed below the large rotational body. | 10-02-2014 |
20140291106 | CLUTCH CONTROL DEVICE IN POWER UNIT FOR VEHICLE - A solenoid body is attached to an outer surface side of a clutch cover attached to an engine main body so as to cover a pair of hydraulic clutches. A hydraulic control solenoid valve for controlling pressure of a hydraulic oil from an oil pump, a single switching valve for alternatively selecting hydraulic chambers of the pair of hydraulic clutches to be supplied with the hydraulic oil from the hydraulic control solenoid valve, and a shift solenoid valve for controlling operation of the switching valve are attached to the solenoid body. | 10-02-2014 |
20140291109 | PARKING BRAKE SYSTEM FOR VEHICLE - The vehicle can include a power transmission system for transmitting power of an internal combustion engine to drive wheels through transmissions and a parking brake system for restraining rotation of the drive wheels by engaging with a part of the power transmission system. The parking brake system for the vehicle can also include a parking drive mechanism which operates a restraining member, by turning of an input shaft of a shift drive mechanism for changing the shift position in the transmission, so as to restrain rotation of transmission gear shafts, and thereby establish a parking brake state. In the parking brake system, a shift cable connected to the input shaft is connected to a parking operation lever. | 10-02-2014 |
20140296030 | POWER UNIT FOR VEHICLE - A transmission partly overlapping clutches as viewed from an axial direction of a crankshaft is disposed below an inclined cylinder axis of an engine main body. A speed change actuator is disposed in a position such that the transmission is interposed between the speed change actuator and the crankshaft. An exhaust pipe connected to a lower side wall of a cylinder head is extended so as to pass above the transmission and partly overlap an upper portion of the speed change actuator as viewed from the axial direction of the crankshaft. | 10-02-2014 |
20140296031 | POWER UNIT FOR VEHICLE AND FOUR-WHEELED VEHICLE - A clutch actuator and a speed change actuator are disposed so as to be adjacent to each other on one side of an engine main body along the axis of a crankshaft. The clutch actuator is provided with a manual clutch operating part capable of being manually operated. The speed change actuator is provided with a manual speed change operating part capable of being manually operated. | 10-02-2014 |
20150090062 | DRUM TYPE-VARIABLE SPEED DRIVE - A drum type-variable speed drive wherein a spring bearing member, which is restricted from moving in the axial direction of departing from a shift fork by a locking member fixed to a shift fork shaft, is pivotally supported by the shift fork shaft. A lost motion spring is interposed between the spring bearing member and the shift fork. Movement of the shift fork shaft in the axial direction caused by rotation of a shift drum presses the spring bearing member through the locking member, whereby the spring load of the lost motion spring acts on the shift fork. | 04-02-2015 |
20160076598 | POWERTRAIN STRUCTURE INCLUDING TORQUE DAMPER DISPOSED BETWEEN DRIVE AND DRIVEN SHAFTS - A powertrain structure includes a drive shaft and a driven shaft disposed coaxially, with end surfaces opposed to each other, and a torque damper interposed between the shafts and having half bodies fitted to a shaft end parts of the drive and driven shafts, with the half bodies joined together by engagement of opposed, outer circumferential end surfaces thereof and a damper spring interposed therebetween such that it straddles drive-side and driven-side spring recesses respectively formed in the opposed surfaces of the half bodies. One of two fitting parts provided between the half bodies and the respective shafts has a negligible clearance and the other has an appreciable clearance in the radial direction of the shafts. | 03-17-2016 |
20160076634 | VIBRATION ISOLATION STRUCTURE OF POWER UNIT INCLUDING TORQUE DAMPERS - A vibration isolation structure of a power unit in which an internal combustion engine is provided with transmissions, including plural transmission gears and a power transmission shaft that pivotally supports the plural transmission gears, and torque dampers are provided between a pair of adjacent transmission gears and the power transmission shaft. The vibration isolation structure can suppress torque fluctuation itself accompanying gearshift and driving reaction force to small fluctuation, and reduce the size of the power unit. | 03-17-2016 |
20160082833 | POWER UNIT FOR A VEHICLE, AND VEHICLE INCLUDING SAME - A power unit for a vehicle includes a clutch actuator mounted to a clutch cover covering first and second hydraulic clutches provided between a crankshaft and first and second main shafts of a transmission. A first actuator body is mounted to the clutch cover at such a position that at least part of the first actuator body overlaps with the first and second hydraulic clutches when viewed from the direction along the axis of the first and second main shafts. A first set of valves, out of a plurality of valves constituting part of the clutch actuator, are disposed in the first actuator body, with their axes of operation set along a plane intersecting the axis of the first and second main shafts. A second set of valves are disposed in a second actuator body mounted to the clutch cover so as to overlap with the first actuator body. | 03-24-2016 |
20160082834 | POWER UNIT FOR A VEHICLE, AND VEHICLE INCLUDING SAME - A power unit includes a transmission adapted to transmit rotational power from a crankshaft to a drive axle, with speed change. The transmission has an input shaft rotatably supported on a crankcase. A hydraulic clutch, configured to be selectively engaged and disengaged, is disposed coaxially with the input shaft. A clutch cover covering the hydraulic clutch is connected to the crankcase. A clutch actuator, which controls switching between engagement and disengagement of the hydraulic clutch, and an actuator cover, which covers the clutch actuator in a liquid-tight manner, are mounted to an outer surface of the clutch cover. An oil temperature sensor is mounted to the actuator cover, and is provided for detecting a temperature of oil in an oil chamber, formed between the clutch cover and the actuator cover. | 03-24-2016 |
20160091077 | POWER UNIT - A power unit having a casing for rotatably supporting a driving force output power shaft and for protecting an oil seal provided between the casing and the driving force output power shaft. A first casing for rotatably supporting input power shafts and a second casing disposed at a position offset in an axial direction from the input power shafts and having an output power shaft supporting portion on which a driving force output power shaft provided in the transmission. The first and second casings are disposed adjacent each other such that the output power shaft supporting portion projects to a side farther than the first casing. A breather chamber is formed between first and second case members which cooperate with each other to configure the second casing disposed above a projection of one end portion of the driving force output power shaft from the output power shaft supporting portion. | 03-31-2016 |
Patent application number | Description | Published |
20080268992 | POWER UNIT FOR MOTORCYCLE - A motorcycle including a power transmission device including a continuously variable transmission having a belt wound around a drive pulley and around a driven pulley and a hydraulically-operated clutch provided on at least one of a drive pulley shaft and a driven pulley shaft and an internal combustion engine wherein a supply of working oil to the clutch and of lubricating oil to a continuously variable transmission is enabled while avoiding a complication of an oil passage configuration and an increase in the diameter of the pulley shaft. A clutch control oil passage directs working oil to a clutch and a lubricating oil passage directs lubricating oil to a continuously variable transmission are provided in the particular pulley shaft on which the clutch is provided, so as to be coaxial with each other and be axially isolated from each other. | 10-30-2008 |
20100147643 | TWIN CLUTCH DEVICE - A twin clutch device wherein a second clutch is arranged coaxially and radially inside of a first clutch outer which forms an annular plate portion. One clutch inners of both clutches is arranged between a clutch member which constitutes a portion of the outer of the first and second clutches and an annular plate portion. Lifter pins have axes arranged parallel to a rotary axis of first and second clutches and axially movably penetrate both clutch inners to bring one ends thereof into contact with pressure plates. First and second drive control members are capable of applying control forces to disconnect the first and second clutches against spring forces of first and second clutch springs. A second clutch outer is rotated together with the first clutch outer and is arranged coaxially with the first clutch. A pair of clutch outers are connected in a relatively non-rotatable manner with each other. | 06-17-2010 |
20110239805 | TRANSMISSION SYSTEM FOR VEHICLE - In a transmission system for vehicles in which shift position changing drive means is coaxially connected to a shift drum selectively establishing a plurality of gear trains for respective gear steps capable of selective establishment in response to a turned position and a shift position sensor detects which one of the gear trains is being established, the number of component parts is reduced and assembly performance is enhanced while allowing for automatic gear shifting by use of a shift actuator. | 10-06-2011 |
20120067320 | INTERNAL COMBUSTION ENGINE WITH VARIABLE FLOW RATE OIL PUMP APPARATUS, AND MOTORCYCLE INCORPORATING SAME - An internal combustion engine includes a crankshaft, a variable flow rate oil pump apparatus including oil pumps having a drive shaft thereof operatively connected with the crankshaft, and a rod-shaped oil passage switching valve operatively connected with the oil pumps. The oil passage switching valve and the drive shaft of the oil pumps are arranged such that axial directions thereof are parallel to an axial direction of the crankshaft. Also, the oil pumps and the oil passage switching valve are disposed so as to overlap each other in the axial direction of the crankshaft. With such configuration of the engine, the effect on various components around the pump can be reduced, while downsizing the oil pump and the engine. | 03-22-2012 |