Abstract: The deterioration of comfortableness is prevented by suppressing the shifting of a timing for releasing a claw clutch due to a change in the characteristic of a friction clutch or the like at the time of torque transmission switching from the claw clutch to the friction clutch during speed changing. A start timing for releasing the claw clutch is learned by learning control means including learning determination provided to determine a state of the released claw clutch, and learning operation means provided to learn are leasing start. Even when a characteristic change occurs because of a change with time, such as the response delay of an assist clutch or the like, each optimal releasing control timing is learned by the claw clutch learning control means.

Abstract: At the time of the change-speed, by correcting the torque reducing portion of an output shaft during the change-speed, the revolution number of an input shaft is controlled on the basis of the corrected torque reduction correcting value. Also, the torque of said input shaft is adjusted at the end of the change-speed on the basis of said torque correcting value.

Abstract: In a control device for an automatic transmission which comprises a torque transmission means provided between an input shaft 5 and an output shaft 6 of a gear type transmission, wherein the torque transmission means in at least one change gear stage is constituted by a friction clutch 19, the torque transmission means in the other change gear stages are constituted by claw type clutches 25, 26 and when performing a change gear from one change gear stage to another change gear stage, the friction clutch 19 is controlled, a torque capacity detecting means 38 which detects or computes, torque capacity of the friction clutch 19 when performing a change gear to a predetermined change gear stage and a clutch release timing determining means 39 which determines a timing when releasing the claw type clutch into a neutral state based on the value detected or computed by the torque capacity detecting means 38, are further provided.

Abstract: To provide an engine power-train control apparatus and method for securing both operability and safety by controlling an actual acceleration/deceleration to a target acceleration/deceleration requested by a driver under an undangerous traveling condition and changing the target acceleration/deceleration so as to take precedence of safety traveling if the driver encounters a dangerous traveling condition. To achieve the above mentioned: the control is performed in which acceleration/deceleration and speed of a motor vehicle are detected; a target acceleration/deceleration is operated; a road condition such as a road gradient or presence or absence of a forward motor vehicle is detected to decide whether the road condition is dangerous; and the target acceleration is changed if the condition is decided to be dangerous.

Abstract: An automatic transmission has a first axis (input axis) 102 for inputting the power, a second axis (output axis or couner axis) 103 for outputting the driving force source, at least one or more first gear group which consists of drive gears 111, 112 fixed on the first axis, and a driven gear 122 provided so as to engage or run idle with respect to the second axis with being engaged with the drive gear, and at least one or more second gear group which consists of driven gears 123, 124, 125 fixed on the second axis, and a drive gear 114, 115 provided so as to engage or run idle with respect to the first axis with being engaged with the driven gear. The automatic transmission further comprises a torque transferring mechanism 140 for transfering the torque between said driven gear which can run idle with respect to the second axis and the driven gear fixed to the second axis.

Abstract: In a control unit of an automotive vehicle, it is possible to securely prevent a tie-up due to a miss-recognition of a disengage timing of a disengage side friction device, securely prevent an early disengage due to an erroneous recognition of the disengage timing and realize a control of accurately and reliably shifting the clutch.

Abstract: An automatic transmission controller and method therefor, comprising: a plurality of torque transmission means provided between an input shaft and an output shaft of a gear-drive transmission, so that at least one gear ratio of the torque transmission means is formed by a friction clutch while the other gear ratios of the torque transmission means are formed by dog clutches, and the friction clutch is controlled when gearshifting is carried out from one gear ratio to another gear ratio; wherein gearshifting time is controlled to be shorter when a depress stroke of an accelerator pedal increases after a gearshifting start request, than that when the depress stroke of the accelerator pedal is fixed.

Abstract: A method for controlling a vehicle having a first clutch mounted between an engine and a gear drive transmission, and dog clutch type torque transmission means disposed between an input shaft and an output shaft of the gear drive transmission, and wherein the first clutch is controlled at starting the vehicle or at gear shifting, comprising the steps of controlling a transmission torque of the first clutch based on a difference between the engine speed/revolution speed of the input shaft at starting the vehicle so as to control a quantity of increase in a transmission torque of the first clutch in accordance with the value of the difference; and controlling the engine torque based on the transmission torque of the first clutch so as to increase the engine torque according to an increase in the transmission torque of the first clutch.

Abstract: A control apparatus and method of a vehicle is provided for correcting a lowered value of the output shaft torque in the gear shifting and suppressing a input shaft speed on the basis of the lowered torque correction. The input shaft torque is adjusted at the termination of the gear shifting on the basis of the lowered torque correction.

Abstract: With a specific shift pattern, a chronological aging of a clutch used in a friction engagement is judged and an obtained judgement result is reflected to other shifts to which the clutch contributes. A control apparatus for an automatic transmission and a control method for an automatic transmission are provided so that even when the clutch used in the friction engagement is presented with chronological aging, in all shift operations, a good shift characteristic can be obtained.

Abstract: A control apparatus and a control method for an automatic transmission, minimizes torque fluctuations which, if left unchecked, give vehicle passengers a disagreeable feeling upon a gear shift. The control apparatus and method suppresses, such torque fluctuations during a shift of the transmission to improve robustness and provide good shift characteristics. An inertia phase is recognized in which the engine speed starts to drop during the shift. At the beginning of the inertia phase, hydraulic pressures supplied to frictional engaging devices in the transmission are kept constant to suppress the torque fluctuations.

Abstract: The object of the present invention is to modify the shock originated from engaging and disengaging of a clutch during acceleration, when using a mesh type transmission provided with a clutch for engaging and disengaging the shift gear and the output shaft.

Abstract: A control apparatus of an automatic transmission capable of achieving a smooth change of output shaft torque to torque which can be generated by a friction clutch, thus enabling a smooth gear change even if the output shaft torque is high at the gear change. If the output shaft torque exceeds limit transmission output shaft torque obtained by multiplying a torque capacity of the friction clutch by a gear ratio provided for the friction clutch when a gear change command is issued in the automatic transmission, engine torque is controlled so as to make the output shaft torque decreased to the limit transmission output shaft torque, and then the engine torque control is switched when the output shaft torque decreased to the limit transmission output shaft torque to start the gear change operation.

Abstract: A mesh type automatic transmission is equipped with a plurality of shift gears arranged to rotate freely to an output shaft for providing driving force to the wheels. Cogged clutches 12, 15 engage with the output shaft. Counter shift gears corresponding to each speed are fixed to a counter shaft rotated by the rotation of an input shaft and mesh with the shift gears for performing automatic shifting by controlling engagement of one of the cogged clutches with the voluntary shift gears determined from the accelerator command value and the vehicle speed. An assist mechanism transmits rotational force of the input shaft to the output shaft via the assist shaft which rotates from the rotation of the counter shaft when no cogged clutch of the plurality of cogged clutches is engaged with any of the plurality of shift gears occurring during switching when an engaged cogged clutch of the plurality of cogged clutches is disengaged and one of the cogged clutch of the plurality of cogged clutches is to be engaged.

Abstract: An apparatus and a method for controlling an automotive vehicle are disclosed, in which a control amount for securing safety of the vehicle and the control amount for achieving a state intended for by the driver of the vehicle are switched in such a manner as to reduce the shock due to the change in the torque generated from the power train, thereby accomplishing both safety and maneuverability at the same time. A first target value is set for controlling at least selected one of the driving torque, the driving force and the acceleration/deceleration rate. A second target value is calculated in accordance with the drive mode intended for by the driver or the driving environment ahead of the vehicle. In the case where a deviation exceeding a predetermined value develops between the first target value and the second target value, the fluctuations of at least one of the driving torque, the driving force and the acceleration/deceleration rate are suppressed.

Abstract: To provide an engine power-train control apparatus and method for securing both operability and safety by controlling an actual acceleration/deceleration to a target acceleration/deceleration requested by a driver under an undangerous traveling condition and changing the target acceleration/deceleration so as to take precedence of safety traveling if the driver encounters a dangerous traveling condition.

Abstract: Control apparatus having improved characteristics at an early stage of changing the gear position which make it possible to clearly discriminate the change in the transmission input shaft revolution speed caused by a rise in the engine torque by depressing the accelerator pedal from changes attending on the disengagement of the disengaging side clutch. For the above purpose, the control apparatus adopts a configuration capable of correcting the oil pressure acting on the friction coupling device by an arrangement that the transmission output shaft revolution ratio, obtained from the transmission output shaft revolution speed and the transmission input shaft revolution speed, follows up the target value of the revolution ratio after a speed change signal is issued.

Abstract: In an engine system, an ignition timing is changed in accordance with operation parameters of an engine. The engine system includes an exhaust gas clarifying equipment with a catalyst to clarify the specified components in the exhaust gas, catalyst temperature detecting unit for estimating or detecting the temperature of the catalyst, torque fluctuation detecting unit for detecting the state of fluctuation of an output torque of the engine, and ignition timing calculating unit for calculating the final ignition timing on the basis of the detected results of the torque fluctuation detecting unit and the catalyst temperature detecting unit.

Abstract: A control apparatus of automatic transmission controls by oil pressure at least one clutch of an automatic transmission connected to an engine output to be engaged or disengaged to make gear shifting. In this control apparatus, the output torque of the engine is calculated on the basis of a parameter representative of a load of the engine and the engine speed. In addition, a transfer torque necessary for the clutch is calculated by use of at least the calculated engine output torque and the engine speed. Then, a command value of oil pressure acted on the clutch is determined by the calculated transfer torque.

Abstract: The vehicle power train control method and apparatus according to the invention secures both operability and safety by controlling an actual acceleration/deceleration to a target acceleration/deceleration requested by a driver under safe traveling condition, and changing the target acceleration/deceleration so as to take precedence for safe traveling if the driver encounters a dangerous traveling condition. According to the invention, acceleration/deceleration and speed of a motor vehicle are detected; a target acceleration/deceleration is determined; and a road condition such as a road gradient or presence or absence of a forward motor vehicle is detected to decide whether the road condition is dangerous. The target acceleration is changed if the condition is decided to be dangerous.