Controller for operating a road-coupled hybrid vehicle

A non-transitory computer-readable medium storing a program for a control device, including at least one electronic control unit, for operating a road-coupled hybrid vehicle including a first drive unit associated with a primary axle and a second drive unit associated with a secondary axle, wherein the first drive unit of the primary axle has at least one internal combustion engine and an automated transmission and the second drive unit of the secondary axle has at least one electric drive motor, wherein the program causes the at least one electronic control unit to:

• receive a specified sum target creep torque as an input variable and a command to switch from single-axle mode to two-axle mode with a specified all-wheel drive factor,
• subsequently set a specified torque at least for the at least one internal combustion engine of the primary axle and to record a clutch torque of the automated transmission, and
• when a difference of the clutch torque and the sum target creep torque is detected, compensate the difference by a specified torque for the at least one electric drive motor of the secondary axle,
• wherein the command to switch from single-axle mode to two-axle mode with the specified all-wheel drive factor is generated when slip occurs while the road-coupled hybrid vehicle is at a standstill.

A road-coupled hybrid vehicle comprising:

• a control device, including at least one electronic control unit;
• a first drive unit associated with a primary axle;
• and
• a second drive unit associated with a secondary axle;
• wherein the first drive unit of the primary axle has at least one internal combustion engine and an automated transmission and the second drive unit of the secondary axle has at least one electric drive motor;
• and
• wherein the at least one electronic control unit is configured to:
• receive a specified sum target creep torque as an input variable and a command to switch from single-axle mode to two-axle mode with a specified all-wheel drive factor,
• subsequently set a specified torque at least for the at least one internal combustion engine of the primary axle and to record a clutch torque of the automated transmission, and
• when a difference of the clutch torque and the sum target creep torque is detected, compensate the difference by a specified torque for the at least one electric drive motor of the secondary axle;
• and
• wherein the command to switch from single-axle mode to two-axle mode with the specified all-wheel drive factor is generated when slip occurs while the road-coupled hybrid vehicle is at a standstill.