A method is provided for controlling a drivetrain of a vehicle, wherein the drivetrain comprises a multi-clutch transmission. The gear shift of the multi-clutch transmission is adapted to be performed either by power cut shift or by power shift dependent on predetermined vehicle shift conditions. The method includes detecting at least one of a plurality of indications of slippery road conditions and setting a slip risk factor, wherein the slip risk factor is dependent on the indication of slippery road conditions. If the slip risk factor is above a first predetermined threshold value the method further comprises controlling the multi-clutch transmission such that an upcoming gear shift is performed as a power-shift independently of if upcoming shift was determined to be performed as a power-cut shift or as a power shift.

Transmissions, control systems for transmissions, and methods of operating transmissions are disclosed herein. A transmission includes an input shaft, an output shaft, one or more clutches, and a control system. The input shaft is configured to receive rotational power supplied by a drive unit. The output shaft is coupled to the input shaft and configured to provide rotational power supplied to the input shaft to a load. The one or more clutches are coupled between the input shaft and the output shaft to selectively transmit rotational power between the input shaft and the output shaft in one or more operating modes of the transmission. Each of the one or more clutches is selectively engageable in response to one or more fluid pressures applied thereto. The control system is configured to control operation of the one or more clutches to select the one or more operating modes of the transmission.

A method for controlling the operation of a transmission of a work vehicle based on the detection of unintended vehicle motion may generally include determining an intended driving direction for the work vehicle while the vehicle is positioned on a sloped surface and initiating a shifting procedure within the transmission for engaging an on-coming clutch associated with moving the work vehicle in the intended driving direction, wherein the on-coming clutch is initially engaged at an initial ramp rate. In addition, the method may include monitoring an acceleration of the work vehicle as the on-coming clutch is being engaged, determining a current travel direction for the work vehicle based on the monitored acceleration and, when the current travel direction differs from the intended driving direction, adjusting the initial ramp rate for engaging the on-coming clutch to an increased ramp rate.

Disclosed are a hybrid vehicle and a method of calculating driving load therefor for determining a more effective gear shift reference in consideration of a driving mode. The method of controlling gear shift of a hybrid vehicle includes predicting required power of a forward driving path, determining a representative driving mode based on mode switch power as a reference of switch between a first driving mode using only an electric motor and a second driving mode using at least an engine and the predicted required power, and applying any one of a first gear shift map corresponding to the first driving mode based on the determined representative driving mode or a second gear shift map corresponding to the second driving mode.

A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing includes a single external power access for the shift actuator. A controller interprets controls the shift actuator with actuating and opposing pulses, and interprets a shaft displacement angle, determines if the transmission is in an imminent zero or zero torque region, and performs a transmission operation in response to the transmission in the imminent zero or zero torque region.

An automatic transmission for a vehicle includes: an automatic transmission mechanism including friction engaging elements which change a power transmission path between an input shaft and an output shaft, an engaging oil pressure control unit which controls an engaging oil pressure that engages a first friction engaging element, and a releasing oil pressure control unit which controls a releasing oil pressure that releases a second friction engaging element, so as to achieve upshifting to a predetermined gear shift stage; and a control device including an engaging oil pressure computing unit which calculates and outputs the engaging oil pressure, a releasing oil pressure computing unit which calculates and outputs the releasing oil pressure, a pulled state determination unit which determines whether or not the vehicle is in a pulled state, and a travel load increase calculation unit which calculates an increase in travel load of the vehicle.

A vehicle system and method for remote start operation in the vehicle system are provided. The method includes responsive to receiving a remote start request and while the vehicle is stationary, automatically engaging a wheel-arresting device coupled to a wheel in the vehicle. The method also includes when an electronically actuated clutch is automatically disengaged and subsequent to the automatic engagement of the wheel-arresting device, implementing remote start operation in an engine, where the wheel-arresting device is distinct from a secondary vehicle brake.

An apparatus and a method for controlling a transmission of a vehicle may include a determining device configured to determine whether a curved road is present within a predetermined distance in front of the vehicle, based on information on a front road, a calculating device configured to correct, based on information on a gradient of the curved road, a vehicle speed in starting cornering of the vehicle on the curved road, determine an expected lateral acceleration based on the corrected vehicle speed and information on a curvature of the curved road, and determine a pattern correcting coefficient based on the determined expected lateral acceleration, a pattern correcting device configured to correct a gearshifting pattern of the transmission, which is preset, based on the pattern correcting coefficient, and a control device connected to the determining device, the calculating device and the pattern correcting device and configured to control the transmission based on the corrected gearshifting pattern when the vehicle enters the curved road.

A control device and a transmission system are provided that allow for comfortable traveling with a human-powered vehicle. The control device includes an electronic controller configured to control a transmission to shift a transmission ratio of a human-powered vehicle in accordance with a first shifting condition set based on a first reference value. The electronic controller is configured to shift the transmission ratio of the human-powered vehicle regardless of the first shifting condition upon determining a second shifting condition set based on travel information related to traveling of the human-powered vehicle is satisfied.

Systems and methods are provided for controlling a transmission. An engine stop-start event may be allowed or denied based on one or more characteristics of the vehicle including the transmission.