An ECU executes processing including a step of counting up a duration Ntime when a Ready-On state is brought, and a shift position is an N position, a step of counting up a duration Not_Ntime when the duration Ntime is equal to or greater than a threshold value A, the duration Ntime is greater than a threshold value C, and the shift position is other than the N position, a step of resetting the duration Ntime and the duration Not_Ntime to initial values in a case where the duration Not_Ntime is greater than a threshold value D, and a step of executing warning processing when the duration Ntime is greater than the threshold value A.

The invention relates to a drive arrangement for a vehicle and a method for gear shifting in a vehicle. The drive arrangement (5) comprises at least a first drive axle (10, 20, 30) operatively connected to a first gear box (11) and a first propulsion unit (12). The drive arrangement (5) further comprises a second gear box (21) and a second propulsion unit (22) operatively connected to the first drive axle (10) or to an optional second drive axle (20, 30). The drive arrangement (5) further comprises at least one electronic control unit (ECU) adapted to govern gear transmission of the first and the second gear boxes (11, 21). The electronic control unit (ECU) is configured to automatically select between shifting gear on the first and the second gear boxes (11, 21) simultaneously, or sequentially. The drive arrangement and the method provides for a very versatile drive arrangement and gear synchronization providing comfort for the driver and the passengers as well as improved vehicle dynamics.

A method for controlling gear shifting, including: acquiring a current gear-shifting parameter of the vehicle (101); according to the current gear-shifting parameter and a preset target rotational speed, determining a gear-shifting inputted rotational speed (102); and when a rotational speed of the vehicle reaches the gear-shifting inputted rotational speed, controlling a shifting fork to start up a gear-shifting operation (103). The method for controlling gear shifting presets the target rotational speed of the gears, and, according to the current gear-shifting parameter of the vehicle that is acquired in real time and the preset target rotational speed, inversely calculates the gear-shifting inputted rotational speed, whereby the gear-shifting inputted rotational speed is an accurate gear-shifting inputted rotational speed that matches with the current condition of the vehicle. When the rotational speed of the vehicle reaches the gear-shifting inputted rotational speed, the shifting fork is controlled to start up a gear-shifting operation, which can realize the accurate gear shifting of the vehicle, which greatly improves the stability of the vehicle when a dual-clutch automatic transmission is performing gear shifting.

A shift by wire-based transmission system and a method for controlling the same, may include a transmission lever, a main controller that determines a target gear stage and a current control delay time of an actuator based on a manipulation signal received from the transmission lever and controls driving of the actuator based on the determined target gear stage and the current control delay time to determine a gear stage position in a response to the driving of the actuator, and a transmission control unit that controls a hydraulic pressure based on the gear stage position determined by the main controller.

A shift control device for a vehicle, includes: a minimum vehicle speed calculator that, when it is determined that a vehicle on traveling needs to decelerate before the vehicle arrives at a forward predetermined point, calculates a minimum vehicle speed using the periphery information; a shift position determination unit that determines a target shift position; and a downshift controller that, when the minimum vehicle speed is calculated, commences a downshift from a current shift position to the target shift position. Further, the downshift controller implements first control of performing multiple downshifts from the current shift position to the target shift position such that shift timing is provided at regular intervals, or second control of performing multiple downshifts such that rotational speeds of the engine after the respective downshifts become equal to each other.

A shift by wire-based transmission system and a method for controlling the same, may include a transmission lever, a main controller that determines a target gear stage and a current control delay time of an actuator based on a manipulation signal received from the transmission lever and controls driving of the actuator based on the determined target gear stage and the current control delay time to determine a gear stage position in a response to the driving of the actuator, and a transmission control unit that controls a hydraulic pressure based on the gear stage position determined by the main controller.

A computer is programmed to determine an occupancy status of a vehicle based on received sensor data; and adjust a parameter of a powertrain of the vehicle in response to data indicating a critical condition of the powertrain based on the occupancy status. The parameter may be one of engine speed, cylinder deactivation, transmission-shift time, and shift schedule.

A shift control device for a vehicle, includes: a minimum vehicle speed calculator that, when it is determined that a vehicle on traveling needs to decelerate before the vehicle arrives at a forward predetermined point, calculates a minimum vehicle speed using the periphery information; a shift position determination unit that determines a target shift position; and a downshift controller that, when the minimum vehicle speed is calculated, commences a downshift from a current shift position to the target shift position. Further, the downshift controller implements first control of performing multiple downshifts from the current shift position to the target shift position such that shift timing is provided at regular intervals, or second control of performing multiple downshifts such that rotational speeds of the engine after the respective downshifts become equal to each other.

Disclosed is a method of controlling a shifting time and a transmission controlled by the method. A method of controlling a shifting time of an automatic transmission mounted on a vehicle to control the driving of the transmission by incorporating the state of an engine includes an entry condition determination step of determining whether the engine of the vehicle being driven is a full throttle driving state and a shifting point correction logic entry condition is satisfied, an engine speed calculation step of calculating an expected maximum engine speed during gear shifting, and a shifting time delay step of delaying a shifting time during a specific time if an expected maximum engine speed value calculated in the engine speed calculation step is less than a preset value. Accordingly, a shifting pattern into which maximum acceleration performance set through maximum performance of an engine has been incorporated can be implemented.

This vehicle control device 10 is provided with: a current gear stage selection unit 13 which selects a current gear stage, which is the gear stage of the vehicle in the present travel state; a travel segment determination unit 15 which determines the next travel segment forwards in the direction of travel of the vehicle V; and a shift control unit 17 which, in the case that the current gear stage selection unit 13 has newly selected a target gear stage lower than the current gear stage during travel of the vehicle V in the current gear stage in the current travel segment, if the next travel segment can be traveled in the current gear stage and the amount the vehicle V will lose speed after traveling the current travel segment is less than or equal to a prescribed threshold value, controls shifting of the gear stage such that downshifting from the current gear stage to the target gear stage is suppressed and the current gear stage is maintained. Even in a state in which downshifting is suppressed, if the state of the vehicle the satisfies a prescribed condition, then the shift control unit 17 controls shifting of the gear stage so as to downshift to the target gear stage without suppression of downshifting.