Method, computer program, computer-readable medium, control arrangement and a vehicle for downshifting gears in an uphill slope

A computer program comprising computer program code stored on a non-transitory computer-readable medium, said computer program product used for a method performed by a control arrangement of a vehicle;

• the vehicle comprising:
• a driveline arranged for providing a torque Tq_wheel to at least one drive wheel, the driveline comprising at least one engine, a clutch and at least one automated manual transmission gearbox;
• and at least one brake arranged for braking the vehicle, said computer program code comprising computer instructions to cause one or more control units to perform the following operations:
• simulating, when the vehicle is travelling in an uphill slope using an initial gear Ginit of the at least one automated manual transmission gearbox, at least one speed profile vsim-1, vsim-2, . . . , vsim-n for a downshift to, and a usage of, at least one gear Ginit-1, Ginit-2, . . . , Ginit-n of the at least one automated manual transmission gearbox being lower than the initial gear Ginit in the uphill slope;
• determining that a minimal speed vmin_1, vmin_2 . . . , vmin_n of each one of the at least one simulated speed profile vsim-1, vsim-2, . . . , vsim-n has a value indicating that an actual speed vact of the vehicle will be less than or equal to zero;
• vsim-1≤0;
• vsim-2≤0, . . . , vsim-n≤0;
• in the uphill slope;
• opening the clutch before the actual speed vact of the vehicle is reduced to a value less than zero;
• vact<0;
• activating the at least one brake;
• shifting the at least one automated manual transmission gearbox to a start gear Gstart;
• closing the clutch;
• and
• deactivating the at least one brake.

A control arrangement for a vehicle;

• the vehicle comprising:
• a driveline arranged for providing a torque Tq_wheel to at least one drive wheel, the driveline comprising at least one engine, a clutch and at least one automated manual transmission gearbox;
• and at least one brake arranged for braking the vehicle;
• the control arrangement being configured for:
• simulating, when the vehicle is travelling in an uphill slope using an initial gear Ginit of the at least one automated manual transmission gearbox, at least one speed profile vsim-1, vsim-2, . . . , vsim-n for a downshift to, and a usage of, at least one gear Ginit-1, Ginit-2, . . . , Ginit-n of the at least one automated manual transmission gearbox being lower than the initial gear Ginit in the uphill slope;
• determining that a minimal speed vmin_1, vmin_2, . . . vmin_n of each one of the at least one simulated speed profile vsim-1, vsim-2, . . . , vsim-n has a value indicating that the actual speed vact of the vehicle will be less than or equal to zero;
• vsim-1≤0;
• vsim-2≤0, . . . , vsim-n≤0;
• in the uphill slope;
• opening the clutch before the actual speed vact of the vehicle is reduced to a value less than zero;
• vact<0;
• activating the at least one brake;
• shifting the at least one automated manual transmission gearbox to a start gear Gstart;
• closing the clutch;
• and
• deactivating the at least one brake.

A vehicle comprising a control arrangement for a vehicle;

• the vehicle comprising:
• a driveline arranged for providing a torque Tq_wheel to at least one drive wheel, the driveline comprising at least one engine, a clutch and at least one automated manual transmission gearbox;
• and at least one brake arranged for braking the vehicle;
• the control arrangement being configured for:
• simulating, when the vehicle is travelling in an uphill slope using an initial gear Ginit of the at least one automated manual transmission gearbox, at least one speed profile vsim-1, vsim-2, . . . , vsim-n for a downshift to, and a usage of, at least one gear Ginit-1, Ginit-2, . . . , Ginit-n of the at least one automated manual transmission gearbox being lower than the initial gear Ginit in the uphill slope;
• determining that a minimal speed vmin_1, vmin_2, . . . vmin_n of each one of the at least one simulated speed profile vsim-1, vsim-2, . . . , vsim-n has a value indicating that the actual speed vact of the vehicle will be less than or equal to zero;
• vsim-1≤0;
• vsim-2≤0, . . . , vsim-n≤0;
• in the uphill slope;
• opening the clutch before the actual speed vact of the vehicle is reduced to a value less than zero;
• vact<0;
• activating the at least one brake;
• shifting the at least one automated manual transmission gearbox to a start gear Gstart;
• closing the clutch;
• and
• deactivating the at least one brake.