A control device for a vehicle, the vehicle including: a battery; a first rotary electric machine coupled to an axle; a second rotary electric machine coupled to an internal combustion engine; a first power conversion circuit; a second power conversion circuit; a capacitor connected between the battery and connection portions connecting the first power conversion circuit and the second power conversion circuit in parallel; and a switching unit connected between the battery and the capacitor, the control device executing discharge control when a collision of the vehicle is predicted, and the discharge control includes: opening the switching unit to interrupt the power supply from the battery; stopping rotation of the first rotary electric machine if the first rotary electric machine is rotating; and discharging the electric charge stored in the capacitor.

Disclosed are a method and device for controlling the state switching of a fluid torque converter, a vehicle and a storage medium, the method including: obtaining a target instruction when the torque converter of the vehicle is in a locked state, the target instruction triggering a change in the torque transmission direction of a transmission system of the vehicle; obtaining a state parameter, and determining whether the current vehicle is in a target operating condition according to the state parameter; and if the current vehicle is in the target operating condition, switching the fluid torque converter to an open state, and switching the torque converter back to the locked state after maintaining the open state for a preset period of time.

Disclosed are a method and device for controlling the state switching of a fluid torque converter, a vehicle and a storage medium, the method including: obtaining a target instruction when the torque converter of the vehicle is in a locked state, the target instruction triggering a change in the torque transmission direction of a transmission system of the vehicle; obtaining a state parameter, and determining whether the current vehicle is in a target operating condition according to the state parameter; and if the current vehicle is in the target operating condition, switching the fluid torque converter to an open state, and switching the torque converter back to the locked state after maintaining the open state for a preset period of time.

Methods and systems are provided for a powertrain. In one example, a method for a powertrain includes adjusting a coupling between a synchronization shaft and one or more of an input shaft and an output shaft in response to a clutch drag torque. The adjusting is based on speeds of one or more of the input shaft, the synchronization shaft, and the output shaft.

Methods and systems are provided for a powertrain. In one example, a method for a powertrain includes adjusting a coupling between a synchronization shaft and one or more of an input shaft and an output shaft in response to a clutch drag torque. The adjusting is based on speeds of one or more of the input shaft, the synchronization shaft, and the output shaft.

Disclosed is method for operating a multi-gear vehicle transmission having a plurality of shifting elements (A, B, C, D, E) for engaging gears of the vehicle transmission. In a neutral gear a transmission input (1) and a transmission output (2) of the vehicle transmission are decoupled from one another. In a driving gear the transmission input (1) and the transmission output (2) of the vehicle transmission are coupled with one another by closing the shifting elements (A, B, C, D, E) associated with the driving gear in order to propel the vehicle. When the neutral gear is engaged, a transmission condition is determined, and if a transmission condition with elevated drag losses exists, then in addition to the shifting elements (A, B, C, D, E) of a driving gear, at least one further shifting element (A, B, C, D, E) of the vehicle transmission is closed.

Disclosed is method for operating a multi-gear vehicle transmission having a plurality of shifting elements (A, B, C, D, E) for engaging gears of the vehicle transmission. In a neutral gear a transmission input (1) and a transmission output (2) of the vehicle transmission are decoupled from one another. In a driving gear the transmission input (1) and the transmission output (2) of the vehicle transmission are coupled with one another by closing the shifting elements (A, B, C, D, E) associated with the driving gear in order to propel the vehicle. When the neutral gear is engaged, a transmission condition is determined, and if a transmission condition with elevated drag losses exists, then in addition to the shifting elements (A, B, C, D, E) of a driving gear, at least one further shifting element (A, B, C, D, E) of the vehicle transmission is closed.

A method for controlling an automatic transmission of a vehicle. The method includes determining a torque of an engine of the vehicle; performing at least one transmission operation comprising actuating a clutch of the transmission by increasing or decreasing a pressure of transmission fluid routed to the clutch; during actuating: determining an input speed and output speed of the clutch; determining that the clutch is slipping; while the clutch is slipping, recording the pressure of transmission fluid routed to the clutch; calculating a torque transmitted by the clutch; associating the pressure of the transmission fluid routed to the clutch with the torque transmitted by the clutch to generate a clutch pressure-torque pairing; iteratively recording the clutch pressure-torque pairing for torque values; continuously calculating an adaptive pressure-torque function of the clutch based on clutch pressure-torque pairings; and controlling the transmission based on the adaptive pressure-torque function of the clutch.

A method for controlling an automatic transmission of a vehicle. The method includes determining a torque of an engine of the vehicle; performing at least one transmission operation comprising actuating a clutch of the transmission by increasing or decreasing a pressure of transmission fluid routed to the clutch; during actuating: determining an input speed and output speed of the clutch; determining that the clutch is slipping; while the clutch is slipping, recording the pressure of transmission fluid routed to the clutch; calculating a torque transmitted by the clutch; associating the pressure of the transmission fluid routed to the clutch with the torque transmitted by the clutch to generate a clutch pressure-torque pairing; iteratively recording the clutch pressure-torque pairing for torque values; continuously calculating an adaptive pressure-torque function of the clutch based on clutch pressure-torque pairings; and controlling the transmission based on the adaptive pressure-torque function of the clutch.

Provided is a wheel loader capable of automatically decreasing vehicle speed without making an operator feel discomfort during a loading operation. A wheel loader 1 mounted with a torque converter type traveling drive system comprises a controller 5 configured to control shifting of a transmission 32. When a vehicle body travels forward at vehicle speed corresponding to a second speed stage set greater by one speed stage than the lowest speed stage of the transmission 32 while operating the lift arm 21 upwardly, the controller 5 sets, as a gear ratio of the transmission 32, an intermediate gear ratio between a gear ratio corresponding to the second speed stage and a gear ratio corresponding to a first speed stage, and outputs a signal for selecting a combination of a plurality of gears corresponding to the set gear ratio to each first to fifth solenoid control valves 32A to 32E.