摘要:
The present invention provides a VCM driver realizing low power consumption and high accuracy and a PWM amplifier compensating a dead time distortion. A phase compensator, a ΔS modulator receiving an output signal of the phase compensator and converting the output signal to a control code of predetermined bits, a PWM modulator receiving the control code to produce a PWM signal, and an output circuit receiving the PWM signal to drive a voice coil constitute a forward path. A sense amplifier sensing a current of the voice coil, an ADC receiving an output signal of the sense amplifier, a low-pass filter receiving an output signal of the ADC, and a decimation filter receiving an output signal of the low-pass filter constitute a feedback path. An output signal of the decimation filter is fed back to the input side of the phase compensator to form a major feedback loop having a first-order characteristic loop gain. An output signal of the decimation filter is fed back to the output side of the phase compensator to form a minor feedback loop having a loop gain which is flat until a target band frequency when viewed from the output side of the phase compensator.
摘要:
To provide a small-sized and lightweight gearshift operating device that is capable of performing a gearshift operation in a short time at low power consumption, a guide slit having a plurality of slits 41 parallel with the shift fork shafts and a plurality of slant slits 42 concentrated to a neutral point 43 from them is employed to guide a follower 33. The follower 33 is operated along the guide slit, thus the number of times of starting and stopping operations of the motor for the shift operation is reduced, and the load of the actuator for the selection operation is reduced.
摘要:
The object of the invention is to provide a less expensive active transmission control system for an automobile, capable of disconnecting an engine, without increasing the number of dog clutches.In an active shift transmission, a second intermediate shaft is provided between a transmission input shaft connected with an engine and a transmission output shaft, and the transmission ratio is determined by the product of gear ratios of two sets of transmission gears. Further, a differential gear box is connected between both intermediate shafts and a motor is connected to the third shat of this differential gear box, so that the engine torque is borne by the motor on a temporary basis, whereby active transmission is performed. When the transmission gear of the input shaft is released, the engine rotation loss at the time of regenerative braking can be eliminated by disconnecting the engine.
摘要:
A clutch structure of a mechanical automatic transmission capable of suppressing the occurrence of vibration by preventing the pressing force of a clutch from being interfered with a thrust force generated by helical gears, wherein a pressing device pressing a disk in a direction opposite to the axial thrust force generated by the engagement of the first gear with the second gear is formed of a disk pressing device and a counterforce imparting pressing device pressing a clutch hub in a direction opposite to the thrust force.
摘要:
In a shift system wherein the transfer of power is performed using a motor, the smaller the gear ratio difference is, the smaller can be made the motor output. However, the number of gears must be increased in order to reduce the gear ratio. As the number of gears increases, the problem of gear noise becomes more serious. It is necessary to prevent both an increase in the number of gears and an increase of the motor output. In a vehicular drive system according to the present invention, a shifting power unit is not merely provided between a first intermediate shaft and a second intermediate shaft of a shift system which has the two intermediate shafts, but one side of a shifting power unit is connected to a vehicle driving power unit, while an opposite side thereof is connected to a power transfer switching clutch so as to be connected to the first or the second intermediate shaft through a reduction mechanism, whereby the output of the shifting power unit is decreased while minimizing an increase in the number of gears.
摘要:
In a control unit for an automobile power transmission apparatus which includes a gear-type transmission and several of the motors are controlled so as to suppress thrust or push-up on the torque of the output shaft of the transmission due to inertia torque or to suppress draw or pull-in on the output shaft.
摘要:
(Subject) To provide an automotive shift change control system and automatic transmission system capable of giving to passengers a comfortable feeling of shift changing or of driving. [Means of Solution]A transmission 100 connects a vehicle-driving engine 1, an electrical rotary machine 5, and axles via a differential gearbox 31, transmits the power of the vehicle-driving engine 1 to the axles via the electrical rotary machine 5 during a shift change, and conducts the shift change. The automotive shift change control unit 200 that controls the change gear ratio of the transmission 100 includes a driving force controller 210 to control the driving force of the electrical rotary machine 5, a shift-changing speed controller 220 to send a driving force command from the electrical rotary machine 5 to the driving force controller 210, and a target shift-changing speed changeover device 230 to output the target shift-changing speed that becomes a target value of the shift-changing speed controlled by the shift-changing speed controller 220.
摘要:
[Subject]To avoid wheel slip with high response and keep down worsening of exhaust irrespective of the engine performance. [Means of Solving the Problems]To be equipped with gear type transmission comprising the first torque transfer path between the input and output shafts formed by mesh type clutches 19, 20 and 21 and second torque transfer path between the input and output shafts formed by transfer torque variable systems 203 and 204, and actuators 27 and 205 for selecting the torque transfer path, wherein, when wheel slips while the automobile is driving using the first torque transfer path, the actuators 27 and 205 are so controlled that at least part of the torque being transferred via the first torque transfer path is transferred via the second torque transfer path.
摘要:
The deterioration of comfort 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 determining a state of the released claw clutch. 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.
摘要:
A control unit and a control method of an automatic transmission can accurately estimate an output shaft torque in a torque converter with little error. The control unit of the automatic transmission estimates an output shaft torque in a torque converter with using a characteristic of the torque converter and controls the automatic transmission by using the estimated torque converter output shaft torque. At lest one of a pump capacity characteristic and a torque ration characteristic of the torque converter is corrected in the control unit by using an oil temperature of the automatic transmission and at least one of parameters expressing an operating state, thereby estimating the torque converter output shaft torque.