Patent application number | Description | Published |
20080207393 | Clutch Controller, Straddle-Type Vehicle, and Method for Controlling Clutch - Appropriate torque is transmitted via a clutch that does not spend too much time on its engaging operation. A clutch controller controls a degree of engagement of the clutch by actuating a clutch actuator based on a difference between actual transmission torque that is transmitted from a drive-side member of a clutch to a driven-side member of the clutch, and target transmission torque that is supposed to be transmitted from the drive-side member to the driven-side member. The clutch controller also determines whether or not a difference in rotational speed between the drive-side member and the driven-side member of the clutch is reduced at an appropriate rate, and depending on the determination result, corrects the target transmission torque. | 08-28-2008 |
20080207397 | Clutch Controller, Method for Controlling Clutch, and Straddle-Type Vehicle - A clutch controller that transmits appropriate torque during engaging operation of a clutch and prevents excessive increase or decrease in engine speed. The clutch controller performs request follow-up control under which a clutch actuator is actuated based on a difference between actual transmission torque that is transmitted from a drive-side member to a driven-side member of a clutch, and request transmission torque that is determined based on a rider's accelerator operation, such that the actual transmission torque approximates the request transmission torque. In an operation range in which engine torque increases as engine speed increases, the clutch controller performs rotational speed induction control, in place of request follow-up control, under which the clutch actuator is actuated such that engine speed increases or decreases to a predetermined engine speed. | 08-28-2008 |
20080207399 | Gear Change Control Device, Straddle-Type Vehicle, and Method of Controlling Gearbox - Riding comfort of a vehicle is improved by reducing deceleration and acceleration exceeding the expectation of a rider due to gear changes. A gear change control device calculates current torque being transmitted from a drive-side member of a clutch to a driven-side member of the clutch, and calculates post-completion torque estimated to be transmitted from the drive-side member to the driven-side member after the completion of engagement of the clutch. The gear change control device then controls the degree of engagement of the clutch according to the difference between the current torque and the post-completion torque, and receives a next gear change command according to the difference between the current torque and the post-completion torque. | 08-28-2008 |
20080208423 | Clutch Controller, Method of Controlling Clutch, and Straddle-Type Vehicle - A clutch controller that improves riding comfort when a clutch is engaged. A target torque obtaining section obtains torque that is supposed to be transmitted from a drive-side member of the clutch to a downstream mechanism in a torque transmission path as target transmission torque, the downstream mechanism including a driven-side member of the clutch. An clutch actuator control section actuates a clutch actuator based on the target transmission torque. The target torque obtaining section estimates torque to be transmitted from the drive-side member to the downstream mechanism after the drive-side member and the driven-side member are completely engaged, and obtains the estimated torque as the target transmission torque. | 08-28-2008 |
20080230345 | Clutch Failure Detection System, Straddle-Type Vehicle, and Method for Detecting Failure - A failure detection system for accurately detecting a failure of a clutch. A clutch actuation mechanism changes the relative positions of drive-side and driven-side members of the clutch. A position detector detects a position of the clutch actuation mechanism as a clutch position. A control unit obtains torque transmitted from the drive-side member to the driven-side member as actual transmission torque. The control unit detects a failure of the clutch based on the actual transmission torque and the clutch position. | 09-25-2008 |
20080254942 | Clutch Controller, Method for Controlling Clutch, and Straddle-Type Vehicle - A clutch controller that transmits appropriate torque during engaging operation of a clutch and prevents excessive increase or decrease in engine speed. The clutch controller performs request follow-up control under which a clutch actuator is actuated based on a difference between actual transmission torque that is transmitted from a drive-side member to a driven-side member of a clutch, and request transmission torque that is determined based on a rider's accelerator operation, such that the actual transmission torque approximates the request transmission torque. If an engine operates in a predetermined operation condition, rotational speed maintaining control is performed under which the clutch actuator is actuated such that the actual transmission torque approximates the engine torque, in place of the request follow-up control. | 10-16-2008 |
20090055060 | Clutch Controller, Method of Controlling Clutch, and Straddle-Type Vehicle - A clutch controller that transmits appropriate torque during engaging operation of a clutch. An actual torque obtaining section obtains torque transmitted from a drive-side member of the clutch to a downstream mechanism in a torque transmission path as actual transmission torque, the downstream mechanism including a driven-side member of the clutch. A target torque obtaining section obtains torque that is supposed to be transmitted from the drive-side member to the downstream mechanism in the torque transmission path as target transmission torque. A clutch actuator control section actuates an actuator by an actuation amount according to a difference between the actual transmission torque and the target transmission torque. | 02-26-2009 |
20090105915 | AUTOMATED TRANSMISSION CONTROLLER AND VEHICLE INCLUDING THE AUTOMATED TRANSMISSION CONTROLLER - Rotational driving force can be transferred to the follower side (clutch plate) of a friction clutch by adjusting the engagement condition of the clutch so that a first gear and a second gear of a dog-clutch-type transmission can rotate relative to each other. At the time of shift change during stop of the vehicle, the clutch can be further connected at a low speed after connection of the clutch until it reaches a reference clutch position. | 04-23-2009 |
20090270224 | GEAR CHANGE CONTROL DEVICE, STRADDLE-TYPE VEHICLE, AND GEAR CHANGE CONTROL METHOD - A gear change control device actuates an actuator in response to an input of a gear change command and sets the clutch in an intermediate state between the engaged and disengaged states before a plurality of gears in the transmission are selectively engaged by dog clutches. In the intermediate state, a driving-side friction member and a driven-side friction member of the clutch are pressed against each other at a pressure lower than in the engaged state. The gear change control device actuates the clutch actuator to restore the friction clutch set in the intermediate state to the engaged state after the plurality of gears are selectively engaged. | 10-29-2009 |
20140046559 | VEHICLE - A vehicle includes a friction clutch located between an engine and a driving wheel; a clutch actuator arranged to disengage and engage the friction clutch; a clutch actuator control section arranged and programmed to control the clutch actuator; a slip detection section arranged to detect a slip of the driving wheel; and an engine control section arranged and programmed to decrease an output of the engine when the slip of the driving wheel is detected by the slip detection section. When the friction clutch is in a half clutch state and the slip of the driving wheel is detected, the clutch actuator control section is arranged and programmed to control the clutch actuator so as to maintain a pushing force of the friction clutch at a fixed or substantially fixed level. | 02-13-2014 |
20140046562 | VEHICLE - A vehicle includes a friction clutch located between an engine and a driving wheel; a clutch actuator arranged to disengage and engage the friction clutch; a clutch actuator control section arranged and programmed to control the clutch actuator; a slip detection section arranged to detect a slip of the driving wheel; and an engine control section arranged and programmed to decrease an output of the engine when the slip of the driving wheel is detected by the slip detection section. When the friction clutch is in a half clutch state and the slip of the driving wheel is detected at the time of starting of the vehicle, the clutch actuator control section controls the clutch actuator so as to change a pushing force of the friction clutch and thus to keep the rotation speed of the engine at a fixed level. | 02-13-2014 |
20140046563 | VEHICLE - A vehicle includes a cruise control section arranged and programmed to perform control to maintain the vehicle speed at a prescribed vehicle speed while a clutch is engaged. A clutch actuator control section performs control to disengage the clutch when the value of a parameter becomes equal to or lower than a first threshold value, in the case where the cruise control section is determined to not be performing the control to maintain the vehicle speed at a prescribed vehicle speed; and performs the control to disengage the clutch when the value of the parameter becomes equal to or lower than a second threshold value, which is lower than the first threshold value, in the case where the cruise control section is determined to be performing the control to maintain the vehicle speed at a prescribed vehicle speed. | 02-13-2014 |