Abstract:
An automatic clutch control device comprises a clutch interposed between a prime move and an input shaft of a transmission; a target clutch torque calculation section; a gear change control section; an accelerator pressing-down speed detecting section; a judging section for judging whether or not the accelerator pressing-down speed exceeds at least one predetermined pressing-down speed threshold value; a prime mover rotational speed increasing control section operated when the accelerator pressing-down speed exceeds the threshold value, for disconnecting the input shaft and the prime mover and then for controlling the prime mover rotational speed to increase and come to be equal to the input shaft rotational speed which has been increased by a lower speed gear stage having been established; and a target clutch torque change calculation section for calculating a change amount that changes the target clutch torque in dependence on the magnitude of the accelerator pressing-down speed.
Abstract:
An apparatus comprises a changeover mechanism which is able to change a connection state of an electric motor output shaft to any one of “an IN-Connection State” in which a power transmission path is provided between a transmission input shaft and the electric motor output shaft, “an OUT-Connection State” in which a power transmission path is provided between the transmission output shaft and the electric motor output shaft, and “a neutral state” in which no transmission path therebetween is provided. When a kick-down-condition is satisfied, a changeover operation for changing an electric motor connection state to the OUT-Connection State is firstly performed. Thereafter, a gear position shifting operation for increasing a transmission reduction ratio is performed. After the kick-down-condition satisfied, an E/G side output torque Te and a M/G side output torque Tm is adjusted in such a manner that a sum Ts of Te and Tm continues to increase.
Abstract:
An on-demand-type drive state control apparatus for a vehicle is provided. In the case where acceleration slippage occurs at drive wheels (rear wheels) of a vehicle when a drive system is in a two-wheel drive state, the drive system is switched from the two-wheel drive state to a four-wheel drive state. That is, the maximum transmittable torque of a multi-disc clutch mechanism increases from “0” to a predetermined value. In the four-wheel drive state, the maximum transmittable torque decreases stepwise from the present value by a predetermined value every time the vehicle travels over a predetermined distance in a state in which none of the wheels cause acceleration slippages. That is the clutch drive current supplied to the multi-disc clutch mechanism decreases gradually (stepwise or in a plurality of steps), and the drive torque distributed to the front wheels (rear wheels) decreases (increases) gradually.
Abstract:
A transmission includes a controller that has a rapid-deceleration judge and a rapid-deceleration processor. The rapid-deceleration judge judges whether a vehicle is decelerating rapidly or not. The rapid-deceleration processor includes a torque-fluctuation inhibitor, and an after-rapid-deceleration change-speed stage anticipator. The torque-fluctuation inhibitor shuts off power transmission from a power source, or holds power transmission by way of a current change-speed stage or lower, when the vehicle is decelerating rapidly. The after-rapid-deceleration change-speed stage anticipator anticipates a subsequent change-speed stage being adapted for restarting or reaccelerating the vehicle that has come out of rapid deceleration.
Abstract:
An apparatus comprises a changeover mechanism which is able to change a connection state of an electric motor output shaft to any one of states including, “an IN-Connection State” in which a power transmission path is provided between a transmission input shaft and the electric motor output shaft, “an OUT-Connection State” in which a power transmission path is provided between the transmission output shaft and the electric motor output shaft, and “a neutral state” in which no transmission path therebetween is provided. The changeover is carried out based on a combination of a vehicle speed V and a required driving torque T. When the vehicle starts to drive, “the IN-Connection State” is selected. After the start of the vehicle and while the vehicle speed V is increasing, the changeovers to “the OUT-Connection State”, “the IN-Connection State”, and “the neutral state” are sequentially carried out.
Abstract:
A shift actuating control system for a synchromesh-type automatic transmission includes a shift actuator having a driving portion activated depending on a shift operation, a shift fork shaft moving a sleeve of a synchromesh mechanism in an axial direction when engaged with the shift fork, and a driving force transmitting member disposed between the driving portion and the shift fork shaft to transmit the driving force generated by the driving portion to the shift fork shaft. The shift actuating control system for the synchromesh-type automatic transmission further includes a detector which detects the deflection of the driving force transmitting member when the driving portion is activated, and a controller which controls the driving portion depending on the deflection detected by the first detector.
Abstract:
A gear shifting control device for varying a gear ratio of a synchromesh transmission which controls an actuator to agree with an actual value of sleeve load in an axial direction with a required value with higher accuracy at a synchronizer of the transmission. A continuously varying driving signal with time is supplied to the actuator when necessary to change the actual value of the sleeve load to the required value different from the current value. A reaching time of the driving signal reaching the value corresponding to the required value to the actuator is determined based on an initial speed which is a speed of the sleeve at start of supplying the driving signal and a vibration cycle when the sleeve load is vibrated in response to the supply of a step signal to the actuator.
Abstract:
A gear shifting control device for synchromesh transmission judges whether a gear clash is generated during gear shifting based on gear shifting progress information. If gear clashes occur more frequently than a reference value during a particular shifting mode, then the control device may thereafter skip that shifting mode, if certain conditions are met. The vehicle operator is warned of this event.
Abstract:
The selecting actuator 16 is an operating member being capable of shifting a selecting lever by way of a neutral position. The shifting actuator 15 is an operating member being capable of shifting a shifting fork by way of the selecting lever 30. A flow controlling means 12 drives the selecting actuator 16 by a controlling hydraulic flow introduced from the hydraulic pressure source. Hydraulic pressure generating means 10,12 supply a hydraulic fluid discharged from the hydraulic pressure source into hydraulic chambers 15A,15B respectively, thereby carrying out a double action of the shifting actuator 15. A high hydraulic pressure is not supplied to the hydraulic chambers 15A,15B.
Abstract:
An apparatus, applied to a vehicle having an internal combustion engine and an electric motor as power sources, comprises a changeover mechanism which is able to change a connection state of an electric motor output shaft to any one of “an IN-Connection State” in which a power transmission path is provided between a transmission input shaft and the electric motor output shaft, “an OUT-Connection State” in which a power transmission path is provided between the transmission output shaft and the electric motor output shaft, and “a neutral state” in which no transmission path therebetween is provided. When a changeover condition is satisfied, a period is provided in which a sum Ts of an internal-combustion-engine-side-output-torque Te and an electric-motor-side-output-torque Tm coincides with a required driving torque Tr, and an electric motor torque continues to be zero.