Abstract:
A shifting control system has two gear shift stage groups, two clutches, a clutch release detection section, a pre-shift controller, a clutch oil level detection section and a pre-shift inhibiting section. The clutches are alternately engaged to selectively transmit power from an engine to a wheel. The clutch release detection section detects a release-side clutch which corresponds to the clutch that is in a released state. The pre-shift controller operates a meshing mechanism of the gear shift stage group corresponding to the release-side clutch, so as to undergo pre-shifting when the other clutch is engaged as an engage-side clutch. The clutch oil level detection section determines whether an oil level in the release-side clutch is equal to or greater than a preset oil level. The pre-shift inhibiting section inhibits pre-shifting while the oil level in the release-side clutch is equal to or greater than a preset oil level.
Abstract:
A speed control method for an automatic transmission includes a first synchronizing process, in which a first clutch portion is operated to be in an engaging state in order to synchronize a first input shaft to a power source, a second synchronizing process, in which the first input shaft is synchronized to the output shaft by operating a gear train connected the first input shaft so as to be in an engaging state, after the first clutch portion is operated so as to be in the disengaging state and a torque transmission path switchover process for switching a torque transmitting path from a second input shaft to the first input shaft by operating the first clutch portion so as to be in an engaging state while the second clutch portion is operated so as to be in an disengaging state.
Abstract:
An electrical device storage unit includes a separation wall having a convex portion and a concave portion; a control unit having a printed circuit board whose front surface and back surface are mounted with an electronic component; an adhesive for joining the convex portion and the printed circuit board; and an electrical device that is electrically connected with the control unit by a conductor and arranged opposite the control unit with the separation wall disposed therebetween, wherein the conductor is provided passing through the separation wall and the printed circuit board, and an end of the conductor is soldered to the printed circuit board.
Abstract:
A transmission device mounted between a supercharger compressor and a pulley designed to drive it from the vehicle motor. Two successive modules each capable of a direct engagement ratio through a free wheel, or of an overdrive ratio by locking the planet gear by means of a clutch are clamped by a spring or released by the action of centrifugal counter-weights. The action is at least compensated by the axial thrust of the teeth Fp produced by the planet gear when it is loaded. The invention independently regulates the rotational speed of the apparatus notwithstanding the speed variations of the pulley.
Abstract:
A shift transmission control device of a vehicle includes a transmission, a clutch, a shift transmission controller, and a shift inhibition state detector. The shift transmission controller is configured to control the transmission and the clutch. The shift inhibition state detector is configured to detect based on a running state of the vehicle that a predetermined shift inhibition condition is satisfied. The transmission is capable of providing a preliminary change gear ratio while the predetermined change gear ratio at which the rotational drive force is transmitted to the drive wheel is maintained. The shift transmission controller is configured to control the transmission to inhibit a change of the predetermined change gear ratio at which the rotational drive force is transmitted to the drive wheel and to provide the preliminary change gear ratio in response to the running state of the vehicle when the shift inhibition condition is satisfied.
Abstract:
A dual clutch transmission includes odd-numbered forward traveling speed drive trains to be activated by engaging a first clutch, even-numbered forward traveling speed drive trains to be activated by engaging a second clutch, and a plurality of backward traveling speed drive trains including at least one backward traveling train to be activated by engaging either the first or second clutch. While a reverse mode is set and when a reverser operation means is shifted between a forward traveling position and a backward traveling position, the first and second clutches are alternately engaged/disengaged for a forward/backward traveling speed shift between a backward traveling speed set by at least one backward traveling speed drive train and a forward traveling speed set by any one forward traveling speed drive train activated by engaging the first or second clutch which is different from the first or second clutch adapted to be engaged for activating the at least one backward traveling speed drive train.
Abstract:
In a motor vehicle, in particular a utility vehicle, having a shifting claw transmission and an electric motor connected to a countershaft of the transmission to facilitate central synchronization for gear speed changes, a transmission controller is connected to the electric motor for sensing the electric motor speed and, together therewith the rotational speed of the countershaft based on the induction values present in at the electric motor and sensed by the transmission controller for use in adjusting the energization of the electric motor.
Abstract:
In a hybrid vehicle according to the invention, upon satisfaction of a predetermined condition with regard to a gearshift position or a drive mode, a virtual gearshift position according to a driving condition is set to a tentative target gearshift position SPtmp (steps S471 and S472). An object gearshift position SP* is set based on the tentative target gearshift position SPtmp and a boundary value Srt to have a gentle change with a variation of smaller than 1 (step S473). A torque demand Tr* and a target rotation speed Ne* of an engine corresponding to the object gearshift position SP* are then set based on tentative torque demands Tra and Trb and tentative rotation speeds Nea and Neb in correlation to virtual gearshift positions immediately below and immediately above the object gearshift position SP* (steps S474 to S476)
Abstract:
A shift control device is provided for reducing a shock generated at a clutch engagement moment in a gearshift operation in a straddle type vehicle having a shift control device that makes the clutch operation and the gearshift operation using the power of an actuator. The actuator is controlled based upon a rotational position and a speed of a shift shaft. When the rotational position of the shift shaft is located between a first position and a second position, the shift shaft is rotated at a speed slower than a rotational speed at which the shift shaft is rotated before reaching the first position to engage a gearshift clutch at a low speed. The first position and the second position are set in such a manner that the gearshift clutch is in a halfway engaged state when the shift shaft is located at a rotational position between the first position and the second position.
Abstract:
At the time of a change of a gearshift position SP from a neutral (N) position to a drive (D) position (step S220), when a vehicle speed V is not lower than a preset reference speed Vref1 (step S230: yes), the control procedure of the invention connects a power shaft with a driveshaft and attains an actual gear change of a transmission to a first speed (step S240). The reference speed Vref1 may be set to a slightly higher vehicle speed than an upper limit of a specific vehicle speed range having a potential for over rotation of a first motor by the gear change of the transmission to the first speed. When the vehicle speed V is lower than the preset reference speed Vref1 (step S230: no), on the other hand, the control procedure prohibits the connection of the power shaft with the driveshaft and the actual gear change of the transmission to the first speed. This arrangement desirably prevents the over rotation of the first motor caused by the gear change of the transmission to the first speed in the state that the vehicle speed V is lower than the preset reference speed Vref1.