| 摘要 |
A system for a vehicle comprises first (12 see fig 4) and second (11 see fig 4) controllers. Typically these are a low speed progress control system (12) and a powertrain controller (11). In a first state, the first controller (12) is configured to generate a controller powertrain signal in order to cause the powertrain to develop drive torque and cause the vehicle to operate in accordance with a target speed value. The second controller (11) receives a signal indicative of the state of the first controller (12) and receives the controller powertrain signal. The second controller (11) causes the powertrain to deliver an amount of drive torque according to the controller powertrain signal in dependence on the state signal. If the powertrain signal exceeds a threshold torque for more than a specified period, the second controller (11) causes a change of the first controllers state. The invention is usable in a step S113 for disabling low speed progress control. |
