An object of the present invention is to provide a vehicle parking lock system that realizes a parking lock with a positive user perception, and enables energy and cost reductions without complex control and with a simple configuration. The object is achieved by a selectable clutch configured to be switchable between four operating modes and provided to one of an input shaft, an output shaft, and an intermediate shaft of a transmission. The operating mode of the selectable clutch is controlled based on detection signals of a plurality of sensors to prevent an unintended movement of the vehicle when the vehicle is stationary.

A control apparatus for a vehicle provided with drive wheels, an automatic transmission, and a manual shifting device for shifting the automatic transmission, the control apparatus includes an automatic parking control portion configured to implement an automatic parking control for automatically parking the vehicle in a predetermined parking space, and controls the automatic transmission to be shifted according to a shifting control signal corresponding to an operation of the manual shifting device, the automatic parking control portion comprising a shifting control portion configured to place the automatic transmission in a power-cutoff state in which a vehicle drive force is not transmitted to the drive wheels, when the manual shifting device is operated to a position a running direction in which is different from a running direction of the vehicle when the automatic parking control is implemented.

A controller is provided to, in response to a speed of the vehicle exceeding an allowable speed based on a measured grade while the vehicle is running and in neutral or park, actuating a vehicle holding mechanism to stop the vehicle.

An object of the present invention is to provide a vehicle parking lock system that realizes a parking lock with a positive user perception, and enables energy and cost reductions without complex control and with a simple configuration. The object is achieved by a selectable clutch configured to be switchable between four operating modes and provided to one of an input shaft, an output shaft, and an intermediate shaft of a transmission. The operating mode of the selectable clutch is controlled based on detection signals of a plurality of sensors to prevent an unintended movement of the vehicle when the vehicle is stationary.

A shift controller for a vehicle includes a shift switching unit, a rotation restricting element, and an electronic control unit. The electronic control unit is configured to: acquire a count value corresponding to a degree of rotation of an actuator; set a rotational position of the actuator when the count value does not change by restricting rotation of the actuator using the rotation restricting element as a reference position of the actuator corresponding to the predetermined shift position; and interrupt setting the reference position of the actuator and restart setting the reference position of the actuator when the rotation of the actuator is restricted and a supply voltage to the actuator is equal to or lower than a predetermined first voltage determination value or a variation in the count value while the rotation of the actuator is restricted is equal to or greater than a predetermined value.

A work vehicle has two transaxles carried by a chassis each having wheel end units rotatable to drive ground-engaging members about wheel axes and having electric machines powering transmission configured to effect multiple gear ratios. The electric transaxles are operationally mechanically uncoupled. One or more sensors detect speed, heading, and loading characteristics of the work vehicle. A controller, having memory and processing architecture, is configured to process control to: receive from the one or more sensors input of the speed, heading, and loading characteristics of the work vehicle. The controller determines a shift pair sequence for shifting the first transmission and the second transmission based on the received input of the speed, heading, and loading characteristics of the work vehicle. The shift pair sequence defines a shift time (t.sub.S1) for shifting the first transmission and a shift time (t.sub.S2) for shifting the second transmission in which the shift time t.sub.S1 is the same or different than the shift time t.sub.S2. The controller generates a first shift command to shift the first transmission at the shift time t.sub.S1 while the second electric transaxle drives the work vehicle and generate a second shift command to shift the second transmission at the shift time t.sub.S2 while the first electric transaxle drives the work vehicle.

A method for controlling driving of a vehicle includes diagnosing whether or not a wheel speed sensor has failed when a shift lever is changed to an R-range while a vehicle travels in a lowest forward gear provided on a same shaft as a reverse gear is provided, disengaging the lowest forward gear and then engaging the reverse gear when the wheel speed sensor is diagnosed to be in a normal state, and calculating a vehicle speed using the wheel speed sensor in a simultaneous disengagement range, in which an odd gear and an even gear are simultaneously disengaged, during gear engagement in the disengagement of the lowest forward gear and then engaging the reverse gear.

A continuously variable transmission (CVT) for a vehicle includes an input member, an output member and a variator assembly including a first pulley rotatably coupled to the input member and a second pulley rotatably coupled to the output. The first and second pulleys are rotatably coupled by a flexible continuous rotatable device. A control system is provided including an instruction set executable to determine an initial variator speed ratio of the variator assembly and detect an event causing a change in an operational state of the vehicle. The control system determines a compensation strategy to adjust the variator speed ratio in response to the change in the operational state of the vehicle and generates an adjusted variator speed ratio based upon the compensation strategy. The control system transmits the adjusted variator speed ratio to the variator assembly.

A range determination device is applied to an automatic transmission provided with an input portion, an output portion, and a range switching mechanism which transmits rotation of the input portion to the output portion, and which is operative to switch the range of the automatic transmission between a forward range and a reverse range, in which directions of transmitting rotation from the input portion to the output portion are different from each other. The range determination device includes a rotational state detection unit which detects a rotational state of a predetermined rotary member included in the range switching mechanism, and a determination unit which determines that the forward range or the reverse range is attained on the basis of the rotational state of the rotary member detected by the rotational state detection unit.

A method for controlling driving of a vehicle includes diagnosing whether or not a wheel speed sensor has failed when a shift lever is changed to an R-range while a vehicle travels in a lowest forward gear provided on a same shaft as a reverse gear is provided, disengaging the lowest forward gear and then engaging the reverse gear when the wheel speed sensor is diagnosed to be in a normal state, and calculating a vehicle speed using the wheel speed sensor in a simultaneous disengagement range, in which an odd gear and an even gear are simultaneously disengaged, during gear engagement in the disengagement of the lowest forward gear and then engaging the reverse gear.