Method and control arrangement for controlling a speed of a vehicle in a downhill road section followed by an uphill road section

A vehicle comprising:

• an electrical machine system being configured to apply a brake power for braking the vehicle to maintain a first vehicle speed in a downhill road section, and to apply a propelling power for propelling the vehicle;
• and
• a control arrangement for controlling a speed of a vehicle in the downhill road section followed by an uphill road section, the control arrangement being configured to:
• determine whether a temperature of the electrical machine system will exceed a temperature limit in the uphill road section, if maintaining the first vehicle speed in the downhill road section;
• and
• reduce the first vehicle speed to a second vehicle speed in the downhill road section such that, in comparison to when the first vehicle speed would have been maintained, the temperature of the electrical machine system is decreased when the vehicle reaches the uphill road section, resulting from a travelling time in the downhill road section being increased.

A computer program product comprising computer program code stored on a non-transitory computer-readable medium, said computer program code configured for controlling a speed of a vehicle in a downhill road section followed by an uphill road section, the vehicle comprising an electrical machine system being configured to apply a brake power for braking the vehicle to maintain a first vehicle speed in the downhill road section, and to apply a propelling power for propelling the vehicle in the uphill road section, said computer program code comprising computer instructions to cause at least one computing processor to perform the following operations:

• determining whether a temperature of the electrical machine system will exceed a temperature limit in the uphill road section, if maintaining the first vehicle speed in the downhill road section;
• and
• when it is determined that the temperature will exceed the temperature limit in the uphill road section:
• reducing the first vehicle speed to a second vehicle speed in the downhill road section such that, in comparison to when the first vehicle speed would have been maintained, the temperature of the electrical machine system is decreased when the vehicle reaches the uphill road section, resulting from a travelling time in the downhill road section being increased.