| 摘要 |
Embodiments of the present invention provide a motor vehicle having: a prime mover; first and second groups of one or more wheels; and a driveline to connect the prime mover to the first and second groups of one or more wheels such that the first group of one or more wheels and not the second group may be driven by the prime mover when the driveline is in a first mode of operation and both the first and second group of one or more wheels may be driven by the prime mover when the driveline is in a second mode of operation, the driveline including an auxiliary portion comprising a first releasable torque transmitting means, a prop shaft and a second releasable torque transmitting means, the first releasable torque transmitting means being operable to connect a first end of the prop shaft to the prime mover, the second releasable torque transmitting means being operable to connect a second end of the prop shaft to the second group of one or more wheels, the vehicle further comprising control means operable to control the first and second torque transmitting means to switch the driveline between the first and second modes of operation such that in the first mode the prop shaft is disconnected from both the prime mover and said second group of one or more wheels by means of the first and second releasable torque transmitting means, in the first mode the control means being operable automatically to connect the prop shaft to only one selected from amongst the prime mover and the second group of one or more wheels by means of the first or second releasable torque transmitting means responsive to a value of a temperature parameter determined by the control means, the temperature parameter corresponding to a temperature of a component of the vehicle. |
