Patent application number | Description | Published |
20080236321 | TRANSMISSION FOR VEHICLE - In a transmission for a vehicle including a shift drum rotatably supported by an engine case for selectively establishing multiple gear trains of respective speed steps in accordance with the rotational position of the shift drum, a shift-position changing-driving member is interlocked with and connected to an end portion of the shift drum so as to drive the shift drum to rotate. A shift-position sensor detects which of the multiple gear trains is established. The maintainability of the shift-position sensor is achieved by a transmitting mechanism that transmits the amount of rotational movement of a shift drum. The shift-position sensor is interlocked with and connected to an end portion of the shift drum. A shift-position sensor is disposed at and fixed to the outside of an engine case so as to detect the acting amount that is transmitted by the transmitting mechanism. | 10-02-2008 |
20090057090 | HYDRAULIC MECHANISM FOR VEHICLE - A clutch hydraulic mechanism wherein the positional relationship between two cylinders is not varied, and a compact structure can be achieved. A see-saw member for transmitting motive power is provided between a second release cylinder and a first master cylinder and the first master cylinder and the second release cylinder are formed in the same cylinder block. This eliminates the need for adjusting the positions of the first master cylinder and the second release cylinder. In addition, it is possible to dispose the first master cylinder and the second release cylinder close to each other. | 03-05-2009 |
20090057092 | CLUTCH HYDRAULIC SYSTEM FOR VEHICLE AND HYDRAULIC SYSTEM - A clutch hydraulic system for a vehicle wherein it is possible to independently operate two systems, to increase the degree of freedom in designing, and to achieve a reduction in cost. A seesaw member for transmitting motive power is provided between a second release cylinder and a first master cylinder, the first master cylinder and a second hydraulic oil pipe communicate with each other through a large diameter hole and a small diameter hole provided as communicating passages through which oil flows. A reservoir tank is provided for reserving the oil for controlling the amounts of the oil in the hydraulic oil passage on the side of the first master cylinder and the amount of the oil in the hydraulic oil passage on the side of the second release cylinder is connected to a second master cylinder. | 03-05-2009 |
20090084208 | TRANSMISSION FOR VEHICLES - A shift position changing drive member for a transmission includes an arm member capable of turning around the axis of a shift spindle for drivingly turning a shift drum in response to the turning of the shift spindle wherein the shift drum is prevented from coming into a neutral position even if the shifting speed is stopped in midstream. A lost motion spring includes gripping portions gripping a pressing portion from both sides of a coil portion surrounding the shift spindle. An arm member of shift position changing drive member is provided with a pressure-receiving member which is gripped by both gripping portions in such a manner that when the turning member is turned, if, in response to the turning direction, the pressing portion abuts against one of the gripping portions for turning, the other of the gripping portions abuts against the pressure-receiving member. | 04-02-2009 |
20090088298 | CLUTCH CONTROL SYSTEM FOR SADDLE RIDING TYPE VEHICLE - A grip force of a driving wheel is maintained by identifying an actual condition of a motorcycle and controlling a clutch in a timely manner. A clutch control system includes a clutch, an actuator unit causing the clutch to engage or disengage, a rear wheel speed sensor, a front wheel speed sensor, a clutch lever sensor and a controller controlling a control motor based on a rear wheel speed and a front wheel speed. When the rear wheel speed is lower than the front wheel speed and an absolute value of a difference between the rear wheel speed and the front wheel speed is greater than a threshold value, the control motor is driven so as to reduce a transmission force of the clutch. When an operational amount of the clutch lever is greater than a threshold value, processing to reduce the transmission force of the clutch is suspended. | 04-02-2009 |
20090266671 | CLUTCH OPERATION MECHANISM - A clutch operation mechanism wherein when a clutch is disengaged and engaged by manual operation or by operation of an actuator the one operation does not affect the other operation. The clutch operation mechanism includes a lever side lost mechanism which is disposed between a clutch lever and a turn-operating force transmitting member for interrupting, from the clutch lever side, an operated-force applied from the turn-operating force transmitting member by driving the electric motor when the clutch lever is not operated. A motor side lost mechanism is disposed between the electric motor and the turn-operating force transmitting member and interrupts, from the side of the electric motor, the operated-force applied from the turn-operating force transmitting member by operating the clutch lever when the electric motor is not operated. | 10-29-2009 |
20100029441 | CLUTCH CONTROL DEVICE - A clutch control device providing an engagement feeling which conforms to a state of a vehicle without requiring a correction of an engagement position even when a clutch is worn. A clutch control device includes a vehicle state detection part for detecting a state of a vehicle, an actuator control part for controlling the actuator, a target torque decision part for deciding a target friction torque value Tt to be generated by the clutch in response to a time which elapses from a point in time that the engagement of the clutch starts as well as in response to a state of the vehicle, and a target oil pressure decision part for deciding a target oil pressure value Pt corresponding to the target friction torque value Tt. The actuator control part controls the actuator so as to set an oil pressure value to the target oil pressure value Pt. | 02-04-2010 |
20100050805 | TRANSMISSION OF VEHICLE - A transmission for a vehicle for performing a shift manipulation at a desired time while ensuring a favorable operation feeling. A lost motion member is arranged in a shift drive force transmitting mechanism arranged between a shift spindle and a shift drum, and a rotary position of the shift drum is resiliently held by a shift stopper mechanism in a state where one of a plurality of sear trains is established or in a neutral state. A state which allows a changeover operation of an established state of a plurality of gear trains due to an action of a shift drive force which is temporarily accumulated by a lost motion means and a state which interrupts the changeover operation can be changed over by a shift restricting mechanism which is provided as a part separate from a shift stopper mechanism. | 03-04-2010 |
20100185371 | SHIFT CONTROL DEVICE AND VEHICLE - A shift control device includes a clutch for performing a connection/disconnection of power transmitted to a drive wheel from an engine based on an operation input to a shift operator, an actuator for performing a drive control of the clutch, and a controller for controlling the driving of the actuator. The controller includes an operation quantity detector for detecting an operation quantity of a shift operator, a shift starter performing a control toward the disengagement of the clutch by driving the actuator at a stage in which an operation quantity detected by the operation quantity detector exceeds a first threshold value, and a shift starter for performing a disengagement control of the clutch by driving the actuator at a stage wherein an operation quantity detected by the operation quantity detector exceeds a second threshold value which is larger than the first threshold value. | 07-22-2010 |
20100234178 | ELECTRONIC CLUTCH CONTROL APPARATUS FOR VEHICLE - An electronic clutch control apparatus is provided for a vehicle having a clutch assembly and a clutch lever operatively associated with the clutch assembly. The electronic clutch control apparatus includes an actuator for driving a clutch assembly, an operation amount sensor for sensing an operation amount of a clutch lever, an electronic control unit for controlling the operation of the actuator based on the detected operation amount received from the operation amount sensor, and a feedback unit for applying an operation reaction force to the clutch lever. The feedback unit includes a plurality of springs having different spring constants. The feedback unit is configured such that when the clutch lever is operated in an operation amount increasing direction thereof, the operational reactive elastic forces of the plural springs are sequentially applied to the clutch lever. | 09-16-2010 |
20100242655 | GEAR SHIFT DEVICE - A gear shift device is provided which changes speed by transmitting rotation of a shift spindle by gear shift operation input to rotation of a shift drum through an intermittent feed mechanism and a lost motion mechanism. An upstream rotation holding mechanism is provided to hold in a required rotational position an upstream rotating member of the lost motion mechanism which is rotated by gear shift operation input through the intermittent feed mechanism. When a required level of gear shift operation is done, the gear shift device changes speed adequately, without continuing gear shift operation, and thus improves operability. | 09-30-2010 |