摘要:
A lock-up clutch control method controls a torque converter comprising an input shaft through which a rotating force from an engine is input, an output shaft which outputs a driving force to the side of driving wheels and a lock-up clutch which operates in response to a hydraulic pressure. A control element controls an engaging pressure of the lock-up clutch by way of the hydraulic pressure. The engaging force of the clutch is controlled in accordance with calculated results of a target following up section for calculating a controlled variable so that a slip follows up a target slip and a control system stabilizing section for calculating the controlled variable so that the disturbance applied to the control system is compensated. Thereby, a stable control may be realized without receiving any effect of the disturbance. The disturbance may be estimated and learned for more accurate control.
摘要:
A vehicle automatic transmission control controls fluid pressure changes applied to a frictional engagement element which is being changed from an engaged state to a disengaged state at a stage before input shaft rotational speed starts to increase from the beginning of a down-shift control. The control instruction value is set to gradually decrease the applied fluid pressure and to increase the ratio of such decrease with elapsed time. Specifically, a solenoid is used to control the fluid pressure applied to a clutch. The duty-cycle instruction for the solenoid is determined based on a quadratic function expressed as: duty cycle value=initial value-at.sup.2.
摘要:
A controller of an automatic transmission having a lockup clutch and a control method of the automatic transmission, in which engine rotational speed is prevented from changing even though turbine rotational speed changes at gear shift and slip control can be carried out without making a driver feel uncomfortable are provided. When a speed change command is detected and it is determined that an inertia phase has not yet started, target engine rotational speed during a replenish period is calculated and the target engine rotational speed control is carried out to have the target engine rotational speed. When it is determined that the control is in the inertia phase, another target engine rotational speed during the inertia phase is calculated. Then, target engine rotational speed control in which the engine rotational speed at the start of the inertia phase is maintained as the target engine rotational speed is carried out.
摘要:
A controller of an automatic transmission having a lockup clutch and a control method of the automatic transmission, in which engine rotational speed is prevented from changing even though turbine rotational speed changes at gear shift and slip control can be carried out without making a driver feel uncomfortable are provided. When a speed change command is detected and it is determined that an inertia phase has not yet started, target engine rotational speed during a replenish period is calculated and the target engine rotational speed control is carried out to have the target engine rotational speed. When it is determined that the control is in the inertia phase, another target engine rotational speed during the inertia phase is calculated. Then, target engine rotational speed control in which the engine rotational speed at the start of the inertia phase is maintained as the target engine rotational speed is carried out.
摘要:
An automotive automatic transmission has an input shaft receiving a rotational force from an engine, an output shaft for outputting a rotational force to a vehicle driving wheel, a frictional engagement device having an adjustable engagement condition, and a transmission device for transmitting a rotational force from the input shaft to the output shaft at a gear speed ratio depending on the engagement condition of the frictional engagement device. A control apparatus for the automotive automatic transmission includes an engagement condition adjusting device for adjusting the engagement condition of the frictional engagement device by feeding a hydraulic pressure thereto in response to an instructed control amount. The control apparatus also includes a control amount calculating device for calculating the control amount such that a time-domain variation in the control amount is along a curve which corresponds to a monotonic increase and whose variation rate gradually increases, or such that a time-domain variation in the control amount is along a curve which corresponds to a monotonic decrease and whose variation rate gradually decreases.
摘要:
The semiconductor chip 1 has a semiconductor substrate 10. In the present embodiment, the semiconductor substrate 10, which is an SOI substrate, is constituted by comprising a support substrate 12, an insulating layer 14 formed on the support substrate 12 with a layered structure, and a silicon layer 16 formed on the insulating layer 14 with the layered structure. The semiconductor substrate 10 has a circuit forming region A1 provided in the silicon layer 16. An insulating region 18 is provided on the semiconductor substrate 10. The insulating region 18 is provided so as to surround the entire side face of the circuit forming region A1.
摘要:
Tire-uniformity components may generate a lateral force on a vehicle body, when the vehicle is in a turning movement. The lateral force may cause vibrations on the vehicle body. The controller controls a motor of an electric power steering system to modulate an assist torque acting on steerable wheels in accordance with the tire-uniformity components. The assist torque is modulated in the same direction as the lateral force. As a result, it is possible to reduce vibrations on the vehicle body, since the modulated assist torque avoids conflict with the lateral force and release the lateral force.
摘要:
A vehicle stability control system uses a physical quantity corresponding to a driver accelerator input to control engine power produced by an engine and to controllably drive an engine load device for regulating the engine power to produce a desired drive force. The vehicle stability control system includes a vibration detector and a corrector. The vibration detector determines a vibration that occurs during running of the vehicle to disturb the stability of the vehicle. The corrector drives the engine load device to suppress the vibration in response to the vibration determined by the vibration detector.
摘要:
A control system for vehicle power train components has an engine ECU, an AT ECU and a manager ECU. The manager ECU outputs command signals such as a target engine torque and a target AT range for the engine ECU and the AT ECU. The manager ECU retrieves data for completing a map for determining availability of the target engine torque from the engine ECU. The manager ECU checks the availability of a computed value of the target engine torque, and if it is necessary, the manager ECU replaces the target engine torque with an available value. The engine ECU executes an engine control process on the basis of the target engine torque of which availability has thus been ensured by the manager ECU. It is therefore possible to operate the vehicle power train components in a more appropriate manner.
摘要:
The invention is a semiconductor device having a metal-semiconductor contact structure. The device includes a metal region having such a high conductivity as to serve as a contact plug. The device also includes a first semiconductor region having a first band gap and being so doped with one conductive type dopant as to exhibit a high conductivity. The device also includes a semiconductor film having a second band gap wider than the first band gap. The semiconductor film is in contact at its opposite surfaces with a part of the metal region and a part of the first semiconductor region respectively. The semiconductor film is doped with the one conductive type dopant so heavily as to suppress electrical current flow between the part of the metal region and the part of the first semiconductor region through the semiconductor film. The semiconductor film comprises amorphous silicon or poly-crystalline silicon. Alternatively, the second semiconductor film comprises non-doped amorphous silicon or non-doped poly-crystalline silicon.