Abstract: An automatic transmission apparatus of the invention includes a friction clutch connected to the output shaft of an engine, a clutch actuator for driving the friction clutch, a parallel shaft type gear transmission whose input shaft is connected to the friction clutch, a wheel brake device, and a start control means, which operates the friction clutch to a target rack stroke and adjusts rotation of the engine to a target engine rotational speed when an accelerator pedal depression amount is below a first preset value, and operates the wheel brake device until the engine rotational speed reaches its peak value when the accelerator pedal depression amount is between the first preset value and a second preset value smaller than the first preset value. With this start control means, a vehicle can be smoothly started.

Abstract: An automatic transmission apparatus comprising a friction clutch (31) coupled to an output shaft of an engine (30), a clutch actuator (42) for operating the friction clutch, a parallel shaft type gear transmission (32), the input shaft of which is coupled to the friction clutch, a gear position changer (51) for changing the speed ratio of the transmission, and a rack actuator (38) for operating the control rack (35) of a fuel injection pump. A signal from a drive state-detector is used to determine a change in the speed ratio of the transmission (32). The rack actuator (38) gradually moves the control rack to an idling speed position, after which the clutch actuator disengages the friction clutch (31). The gear position changer (51) is operated in accordance with the disengagement of the friction clutch (31), so that the speed ratio of the transmission is changed accordingly.

Abstract: An operating device in which a speed change operation performed by a manual operating member is boosted by electric energy or hydraulic pressure or the like and transmitted to the transmission, wherein if an operator moves the manual operating member to perform the speed-change operation, a high reaction force is applied against the movement of the manual operating member by an interference device until the speed change condition of the transmission has reached the one desired and in turn when the speed-change condition of the transmission reaches the one desired, operation of the interference means is controlled by a control means, resulting in applying a low or no reaction force in respect to the movement of said manual operating member, thereby the operator can be apprised of the completion of the speed-change operation of the transmission through a rapid decrease in resistance to operation of the manual operating member, and upon completion of the speed-change operation, the operator may direct his effort

Abstract: A positioning device capable of positioning a rod with a first piston fixed thereto into one of four positions selectively by means of a second piston disposed within a chamber A formed in a large-diameter cylinder portion and first, third and fourth pistons disposed within chambers B and C formed in a small-diameter cylinder portion. It is convenient to apply this positioning device to a select mechanism of a transmission or the like having four select positions.