In one general aspect, the present disclosure is related to a sensor device for detecting selector lever positions of a selector lever for a motor vehicle. The sensor device may include at least four sensors and a code carrier, where the code carrier is arranged such that it is faced by the at least four sensors. The code carrier may be movable with respect to the at least four sensors. The code carrier may be attached to the selector lever. The code carrier may include several coding areas each with an encoding. The code carrier can thus be referred to as coding carrier. The encoding of the individual coding areas can be read by using the sensors.

An automatic transmission capable of properly judging faults of a switching mechanism is provided. A control part ECU of the automatic transmission TM has an actual change gear ratio calculating part 10 and a fault judging part 11. Under a condition that the control part ECU has recognized that the first brake device B1 is switched to a reverse rotation preventing state, if the actual change gear ratio is kept to be an actual change gear ratio prior to a reduction of a rotational speed of a drive source ENG when the rotational speed of the drive source ENG is reduced, then the fault judging part 11 judges that a first brake B1 has a fault.

A vehicle power transmission device comprises: a continuously variable transmission configured to include a primary pulley, a secondary pulley, and a transmission belt wound between the primary pulley and the secondary pulley; a belt running clutch of hydraulic type for transmitting power to the continuously variable transmission; and a hydraulic control circuit controlling the continuously variable transmission and the belt running clutch, the hydraulic control circuit comprising a fail-safe valve switching a communication destination of an oil supply passage for supplying a hydraulic fluid to the belt running clutch to one of a first oil passage supplied with a control hydraulic pressure and a second oil passage supplied with a hydraulic pressure higher than the control hydraulic pressure, the fail-safe valve connecting the oil supply passage with the second oil passage when the fail-safe valve is switched to a failure position. The second oil passage is provided with an orifice.

The present invention is a control device for an automatic transmission, the control device being adapted to control the automatic transmission including a torque converter and a stepped transmission mechanism provided on a power transmission route from the torque converter to drive wheels, wherein while a non-driving range of the automatic transmission is selected, determination on interlock in the stepped transmission mechanism is executed on the basis of deceleration of an output shaft of the stepped transmission mechanism and a change in the torque converter.

Systems and methods for diagnosing operation of a transmission warm-up valve are presented. In one example, the transmission warm-up valve is commanded to an open position and an estimated transmission fluid temperature is compared to an actual transmission fluid temperature to determine whether or not the transmission warm-up valve is operating as commanded.

A transmission system for a vehicle comprises a first partial transmission with a first controllable clutch and a second partial transmission with a second controllable clutch each forming a respective transmission path between an input and a common output (to), the first and the second controllable clutches having first and second actuators, respectively, to control an operational state of said controllable clutches. A controller is provided to control the first and the second actuators, the controller being configured to selectively assume one of a plurality of control modes. These include amongst others a safety control mode which is selected upon detecting that a value of an acceleration of the vehicle is lower than a negative threshold value.

In one general aspect, the present disclosure is related to a sensor device for detecting selector lever positions of a selector lever for a motor vehicle. The sensor device may include at least four sensors and a code carrier, where the code carrier is arranged such that it is faced by the at least four sensors. The code carrier may be movable with respect to the at least four sensors. The code carrier may be attached to the selector lever. The code carrier may include several coding areas each with an encoding. The code carrier can thus be referred to as coding carrier. The encoding of the individual coding areas can be read by using the sensors.

An inspection device for inspecting a vehicle in which drive force generated by a motor is transmitted to a drive wheel via a plurality of gears is provided. The inspection device includes a generation unit configured to cause the motor to generate torque in two rotation directions different from each other, in a state in which the vehicle is stopped, and an estimation unit configured to estimate worn states of the plurality of gears, based on a rotation amount of the motor in accordance with the torque in the state in which the vehicle is stopped.

A torque converter management system includes a torque converter having a clutch and a torus. The torque converter management system includes memory hardware that stores instructions, that, when executed on data processing hardware of the system, cause the system to perform operations for protecting the torque converter. The operations include receiving torque converter temperature associated with the torque converter. The operations further include obtaining a torque converter protection schedule including one or more torque converter protective action initiation threshold temperatures each having an associated torque converter protective action and determining whether the torque converter temperature(s) exceeds a first one of the torque converter protective action initiation threshold temperatures. When the first torque converter temperature exceeds the first one of the torque converter protective action initiation threshold temperatures, the system initiates a first torque converter protective action associated with the exceeded first torque converter protective action initiation threshold temperature.

A torque converter management system includes a torque converter having a clutch and a torus. The torque converter management system includes memory hardware that stores instructions, that, when executed on data processing hardware of the system, cause the system to perform operations for protecting the torque converter. The operations include receiving torque converter temperature associated with the torque converter. The operations further include obtaining a torque converter protection schedule including one or more torque converter protective action initiation threshold temperatures each having an associated torque converter protective action and determining whether the torque converter temperature(s) exceeds a first one of the torque converter protective action initiation threshold temperatures. When the first torque converter temperature exceeds the first one of the torque converter protective action initiation threshold temperatures, the system initiates a first torque converter protective action associated with the exceeded first torque converter protective action initiation threshold temperature.