公开(公告)号：US10647320B2

公开(公告)日：2020-05-12

申请号：US15755185

申请日：2015-08-28

Applicant: VOLVO TRUCK CORPORATION

Inventor： Tobias Carlsson ,  Anders Eriksson ,  Lars Karlsson ,  Henrik Andersson

IPC: B60W30/14 ,  B60W10/18 ,  B60W30/19 ,  B60T7/12 ,  B60W30/188 ,  B60W10/11 ,  B60W30/18

Abstract: A device and a method for controlling vehicle speed in a vehicle equipped with cruise control while traveling downhill. The method involves driving a vehicle downhill with the cruise control set to a brake speed; detecting a current vehicle speed; applying the auxiliary brake to maintain the brake speed; detecting a request for a downshift from a current gear to a lower gear; and determining if a downshift is permissible at the current speed. If a downshift is not permissible, then a control unit automatically applies the service brakes to retard the vehicle speed; retarding the vehicle from a current speed to a lower speed at which a downshift to a lower gear is permissible; and performing a downshift to a lower gear when the second vehicle speed is reached. The cruise control is set to a second brake speed lower than the first brake speed.

公开(公告)号：US10576950B2

公开(公告)日：2020-03-03

申请号：US15755197

申请日：2015-08-28

Applicant: VOLVO TRUCK CORPORATION

Inventor： Tobias Carlsson ,  Anders Eriksson ,  Lars Karlsson ,  Henrik Andersson

IPC: B60T8/32 ,  G05D1/00 ,  G06F7/00 ,  G06F17/00 ,  B60T8/17 ,  B60T8/171 ,  B60T8/172 ,  B60T8/24 ,  B60K31/00 ,  B60K31/04

Abstract: A device and a method for controlling vehicle speed in a vehicle equipped with brake cruise control when the vehicle is travelling downhill are provided. The method involves driving a vehicle downhill with the brake set speed set to a first brake set speed; detecting a current vehicle speed; automatically applying a brake torque using at least an auxiliary brake to maintain the first brake set speed; and detecting a manual application of a vehicle service brake, in order to decrease vehicle speed. If a control unit detects that the driver is applying the service brake, then the control unit is automatically arranged to set the brake set speed to a second brake set speed that is lower than the first brake set speed; and to apply a brake torque using at least the auxiliary brake if a detected current vehicle speed exceeds the second brake set speed.