A vehicle makes a notification to prompt a driver to perform a predetermined operation in a case in which a predetermined function of the vehicle is lost, and starts a recovery operation of the function on condition that the predetermined operation is performed.

A dual clutch automatic transmission includes a one-way clutch provided in a driving force transmission path that establishes a certain gear ratio in a first set of gear ratios. A driving transmission direction of the one-way clutch is set such that a rotation inputted from a wheel side to an output member in a predetermined rotational direction is transmitted to the input shaft. The predetermined rotational direction corresponds to a backward movement of a vehicle. On condition that the traveling state of the vehicle reaches a predetermined deceleration state, switching control of setting the gears for the first set to a neutral position can be executed.

A power transmission unit that can prevent unintentional disengagement of a clutch. A first set of teeth formed on an outer circumferential surface of a first rotary member is engaged with a third set of teeth formed on an inner circumferential surface of a second rotary member. A second set of teeth formed on an inner circumferential surface of the first rotary member is meshed with a fourth set of teeth formed on an outer circumferential surface of a third rotary member. A center of engagement between the first set of teeth and the third set of teeth is situated at a point withdrawn from a center of engagement between the second set of teeth and the fourth set of teeth in the direction to disengage the first set of teeth from the third set of teeth.

A manual shift transmission is disclosed which includes a shaft, at least one loose wheel carried by the shaft and a gear shift sleeve, which is moveable along the first shaft between a gear position coupling the first loose wheel to the shaft and a neutral position allowing a rotation of the loose wheel against the shaft. A gear shift follower is configured to move the gear shift sleeve along the shaft and acts on the gear shift sleeve. An actuating rod can be shifted in the direction of the shaft for shifting the gear shift follower. The actuating rod carries a clutch body which is adjustable between an active position engaging in a recess of the gear shift follower and a passive position sunk into the first actuating rod.

The invention relates to a speed-change gearbox for a motor vehicle, provided with shiftable gearwheel sets (gears), which are arranged in a first and in a second sub-gearbox, wherein the sub-gearboxes are provided respectively with at least one input shaft and a common drive shaft and the input shaft that can be alternately activated via a power shiftable clutch. In order to achieve a functionally expanded shifting strategy, it is proposed that at least one gearwheel set can be associated with both sub-gearboxes.

An electro-hydraulic hybrid-power driving system, comprising an engine, a first motor, a second motor, a first planetary gear set, a second planetary gear set, and a hydraulic control shift set that is connected to the engine. The first motor is axially connected to the engine, the second motor is axially connected to the first planetary gear set and the second planetary gear set, and the first planetary gear set is coaxially connected to the second planetary gear set. The hydraulic control shift set includes a first gear and a second gear, a dual wet clutch is disposed between the first gear and the second gear, and the first gear, the second gear, and the dual wet clutch are coaxially connected to the engine. The present invention by disposing a specific electro-hydraulic hybrid-power driving system, different working modes can be implemented according to different requirements.

A transmission includes first and second input shafts connected via a first clutch to a power source, an output shaft, a first shift gear group including shift gears arranged between the first input and output shafts, a first switching mechanism including a synchronizer for selecting one shift gear from the group, a second shift gear group including shift gears arranged between the second input shaft and the output shaft, and a second switching mechanism including a synchronizer for selecting one shift gear from the group. In order to learn a synchronizer balk position, either the first or second shift gear group, where no targeted synchronizer belongs, is set to any shift gear, both the first and second clutches are engaged, the balk position of the synchronizer is detected in a process of the targeted synchronizer being slid, and information specifying the detected position is stored.

A driveline assembly for a recreational vehicle may include an engine and an automated sequential transmission.

A power transmission apparatus for a vehicle may include a first input shaft adapted to selectively receive torque of an engine, a second input shaft disposed without rotational interference with the first input shaft, a third input shaft disposed in a row with the second input shaft and without rotational interference with the first input shaft, a planetary gear set including a first rotation element, a second rotation element directly connected to the third input shaft, and a third rotation element directly connected to the first input shaft, a motor/generator directly connected to the first rotation element, a first speed output unit adapted to convert torque input from the second input shaft or the third input shaft and output the converted torque, and a second speed output unit adapted to convert torque input from the second input shaft or the third input shaft and output the converted torque.

A double clutch transmission (DCT) provides eight forward speeds and one reverse speed while minimizing the number of gear trains used for changing speed and the whole length thereof. In particular, the DCT has a simple structure using four or five gear trains and four synchro devices and is capable of providing eight forward speeds and one reverse speed while reducing the entire weight thereof. In a conventional DCT, when a gear train is added to increase the number of speed stages, the whole length thereof is increased. The provided DCT can minimize the whole length and the weight thereof, thereby reducing the manufacturing cost, the number of parts, and the fuel efficiency.