摘要:
A method for operating a vehicle having a dual-clutch transmission (DCT). The DCT includes first and second clutches; a first shaft operatively connected to the first clutch, the first clutch being selectively actuated to couple the first shaft to a clutch input member; a second shaft operatively connected to the second clutch, the second clutch being selectively actuated to couple the second shaft to the clutch input member; first and second driving members mounted to the first and second shafts respectively; and an output shaft operatively connecting the first and second driving members to a ground-engaging member of the vehicle. The method includes determining if the vehicle is substantially stationary; and in response to being substantially stationary, actuating the first and second clutches to cause simultaneous driving engagement of both the first and second shafts with the output shaft to thereby lock the output shaft.
摘要:
A control device for an automatic transmission arranged between an engine and a drive wheel, the automatic transmission including a torque converter having a lock-up clutch, and a transmission mechanism. The control device includes a shift control unit configured to perform shift control of the transmission mechanism. The shift control unit includes a forced downshift control processing unit configured to implement forced downshift when an accelerator foot release operation is performed during auto-upshift in a power-on state with the lock-up clutch engaged. The forced downshift control processing unit is configured to start the forced downshift before an engine rotation speed that has decreased due to the auto-upshift reaches a lock-up release rotation speed.
摘要:
A control unit (11) that outputs a shift signal to a transmission (4) when the control unit recognizes that the bucket (1) is in a loading position, such that the transmission (4) shifts not to the next-higher gear ratio, but to a further, even higher, gear ratio.
摘要:
A slip control method and arrangement for a driveline including a continuously variable transmission is described herein. The driveline includes a clutch that is so controlled as to slip when a torque higher than the usable torque attempts to pass through. Accordingly, the clutch prevents the prime mover from stalling.
摘要:
A theoretical torque transmitted through a belt is calculated, and a first guaranteed torque is calculated by adding a marginal torque to the theoretical torque. In step S101, the theoretical torque is multiplied by a safety factor, calculating a second guaranteed torque. The second guaranteed torque is set to a value greater than a lower limit value. A smaller one of the first guaranteed torque and the second guaranteed torque is stored in a buffer, and a pressing force calculation reference torque is set through the buffer.
摘要:
In an engine with an automatic transmission having a lock-up mechanism, engine ignition timing is retarded more for a predetermined period immediately after a lock-up than the engine ignition timing normally set based upon an engine operating condition when a lock-up control is performed. Thereby, a knocking occurrence immediately after the lock-up is properly prevented.
摘要:
Non-synchronized, manually shiftable transmissions of modern vehicle types are actuated by means of an automated transmission control, and the driver can optionally select any gear by means of an actuator which is electrically connected to the transmission control device. In general terms, the method of this invention includes the operator generating a signal indicating a desire to shift the transmission. The transmission then automatically begins implementing the shift. If the currently engaged gear is not disengaged within a preselected time period, because the system cannot achieve a break torque condition, for example, the system signals the driver to manually operate the clutch. A visual and audible signal preferably are provided to the driver. Once the driver manually operates the clutch, the system is able to complete the desired shift.
摘要:
A process for the control of non-synchronized, manually shiftable vehicle transmissions which are actuated in vehicles of new construction by means of an automated transmission control system whereby the driver is able to select a desired gear by means of an operating unit which is connected electrically to the transmission control system. When the vehicle is stopped and the clutch is disengaged practice of the invention prevents a situation in which the engagement of a gear is prevented by a tooth-on-tooth position of the transmission claws. The disclosed process makes it possible to engage the selected gear in all operating states of the vehicle in a simple and reliable manner. In this regard, a desired gear is first selected, and the clutch is then disengaged. When a suitable speed of the transmission input is then reached, a gear to be engaged is automatically engaged. Thereby, the engagement of a gear when the vehicle is stopped is systematized and facilitated for the driver. Furthermore the driver need not disengage and then again engage the clutch repeatedly in order to avoid a tooth-on-tooth position. The process is used preferably in utility vehicles.
摘要:
A control method/system for controlling engagement of reverse ratios in automated vehicular transmission systems (10) having a controller (38) issuing command output signals to non-manually controlled actuators (30, 34) is provided. The controller includes logic rules for (i) sensing predetermined reverse ratio enabling conditions, including remaining in neutral for at least a predetermined period of time (N.sub.T >REF.sub.2) prior to selecting reverse, and (ii) issuing commands to cause a reverse ratio to be engaged only upon sensing such conditions, to minimize accidental engagement of reverse ratios without requiring mechanical interlocks.
摘要:
A control system and method for a vehicular semi-automatic mechanical transmission system (10) is provided for continuously informing the operator of available ratios and for permitting selection of a desired shift (GR.sub.T(2)), which will be immediately implemented, regardless of the previous selection or ongoing shift implementation, of engagement of a previously selected target ratio (GR.sub.T(2)). During a shift transient to engage a selected target ratio (GR.sub.T(1)), the display will show the maximum available upshifts and downshifts from the target ratio, and shift requests will be interpreted as requests for upshifts and downshifts from the initial target ratio (GR.sub.T(1)) into a new target ratio (GR.sub.T(1)).