A transmission arrangement for a hybrid vehicle, in which a connection for an internal combustion engine, a connection for an electric machine, and a transmission part are arranged in a manner able to be coupled to each other. The transmission part comprises a simple Ravigneaux planetary gear set with two planetary gears (PG1, PG2) and a single ring gear. The ring gear is coupled to a spur and bevel gear transmission (KT), which forms a power takeoff of the transmission arrangement. The transmission part furthermore comprises two brakes (B1, B2) and two clutches (K1, K2) as force-locking shifting elements.

In an engine speed display control device of a vehicle including an engine speed display to display a determined display value of the engine speed, the engine speed display control device determines the display value of the engine speed, and includes a variation restricting display control portion configured to implement a variation restricting display control when a garage-parking shifting operation of the transmission shifting member is performed while the vehicle is held stationary in a non-operated position of the accelerator pedal. The variation restricting display control portion determines the display value of the engine speed in the variation restricting display control such that an amount of variation of the display value is smaller than in a normal display control in which the display value is determined according to the actual value.

A drive device is equipped with a countershaft, an engine, a first MG, a second MG, and a Ravigneaux-type planetary gear unit that includes a ring gear, a pinion, a carrier, a first sun gear, and a second sun gear. The pinion includes a first tooth portion that meshes with the ring gear and the first sun gear, and a second tooth portion that is provided at a position offset from the first tooth portion in an axial direction of the pinion and that meshes with the second sun gear. The drive device is further equipped with a first clutch that changes over a state of connection between the first sun gear and the engine, a second clutch that changes over a state of connection between the carrier and the engine, and a first brake that changes over a state of fixation of the second sun gear to a case.

A transmission for a vehicle capable is provided to improve fuel efficiency through multiple gear shift stages and enhance power performance of an engine. By combining first and second planetary gear sets, a compound planetary gear set, and multiple frictional elements selectively connecting rotary components of the three planetary gear sets via a corresponding shaft, the transmission provides eleven forward gear stages and three reverse gear stages. In particular, a first rotary element of the first planetary gear is fixedly connected to a transmission case, a second rotary element of the first planetary gear is fixedly connected to a second rotary element of the second planetary gear, and a third rotary element of the first planetary gear device is selectively connected to a first rotary element of the compound planetary gear set and a fourth rotary element of the compound planetary gear set.

A motor vehicle transmission comprising a drive shaft, an output shaft, a planetary gear set system, and four shift elements. The first planet gear meshes with the first sun gear, first ring gear, and with one of the second planet gears. The second planet gear meshes with the second sun gear and second ring gear. The first sun gear has a smaller diameter than the second sun gear. The first ring gear has a larger diameter than the second ring gear, and is connected to the output shaft. The second ring gear is rotationally fixable by closing the first shift element. The drive shaft is connectable to the second sun gear by closing the third shift element. The drive shaft is connectable to the planet carrier by closing the fourth shift element. The first sun gear is rotationally fixable by closing the second shift element.

Desired is a control device for a vehicle drive apparatus capable of determining an engagement failure in an engagement device when shifting a transmission device to a neutral state and making the rotational speed of a driving force source reduced. In order to shift a transmission device from a state in which an object shift speed is established and the vehicle is traveling to a neutral state in which no shift speed is established in the transmission device (#02), when an object engagement device is disengaged while maintaining engagement of a non-object engagement device and the rotational speed of a driving force source (#04, #06) is made to be reduced, an engagement failure in the object engagement device (#02, #07) is determined based on a change in the rotational speed of an input member.

A transmission (G) for a motor vehicle includes an in-order-of-rotation-speed fourth shaft (W4) permanently connected to a transmission output (GW2-A), an in-order-of-rotation-speed first shaft (W1) either fixable by engaging a first shift element (B1) or connectable in a rotationally fixed manner with a transmission input (GW1-A) by actuating a second shift element (K1), an in-order-of-rotation-speed second shaft (W2) connectable in a rotationally fixed manner with the transmission input (GW1-A) by actuating a third shift element (K2), an in-order-of-rotation-speed third shaft (W3) is connectable in a rotationally fixed manner with the transmission input (GW1-A) by actuating a fourth shift element (K3), and an in-order-of-rotation-speed fifth shaft (W5) fixable by engaging a fifth shift element (B2).

Disclosed is an automatic transmission for a hybrid vehicle, the automatic transmission including an input shaft driven by the combustion engine, an output gearwheel, ring gear or pinion, a stationary element such as a casing for example, an electric machine of which the stator is secured to the stationary element, first, second, third, fourth and fifth selective torque transmitting members that can be selectively engaged or activated in order to establish different transmission ratios, a single double planetary gearset of the Ravigneaux type (TPR) the constituent functional elements of which are arranged as two sets of planetary gears connected by the aforementioned members to the input shaft and to the stationary element, the rotor of the electric machine being mounted on a functional element that injects the movement of the gearset.

Disclosed is a vehicle transmission with multiple gear stages, the transmission being capable of improving fuel economy and the performance of a vehicle. The vehicle transmission includes four planetary gear sets and six friction members. A shifting operation is performed such that rotary elements of the planetary gear sets are selectively connected and disconnected by the friction members so that the speed and direction of rotation of each gear are changed. Through this shifting operation, a vehicle can drive with one of ten or more forward speed gear ratios and one or more reverse speed gear ratios.

A planetary gear train of an automatic transmission may include: an input shaft receiving torque of an engine; an output shaft transmitting torque to an output gear; a first planetary gear set including first, second, and third rotation elements; a compound planetary gear set including fourth, fifth, sixth, and seventh rotation elements; a fourth planetary gear set including eighth, ninth, and tenth rotation elements; a first shaft fixedly connected to the ninth rotation element and the input shaft; a second shaft fixedly connected to the second and sixth rotation elements and fixedly connected to the output shaft; a third shaft fixedly connected to the first and tenth rotation elements; a fourth shaft fixedly connected to the fourth rotation element; a fifth shaft fixedly connected to the fifth rotation element; a sixth shaft fixedly connected to the seventh rotation element; and a plurality of shafts selectively connected to a transmission housing.