Method and system for driving of a vehicle
AssigneeScania CV AB
InventorsRoger Hälleberg, Anders Jensen
Life of this patent
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Abstract
A method for control of a vehicle's gearbox which is connected to a combustion engine and can be set to a number of different transmission ratios. When the vehicle is running in a low transmission ratio and at an engine speed below that at which the torque plateau for the low ratio is reached, in a situation where there is a reduced need for power output to propel the vehicle, determine a speed parameter for the vehicle, switch the gearbox to a higher transmission ratio than the low ratio when the speed parameter fulfills a first criterion.
Claims18
A method for control of a gearbox of a vehicle wherein the gearbox is connected to a combustion engine of the vehicle and the gearbox can be set to a number of different transmission ratios, wherein the method is performed:
- when the vehicle is running in a low transmission ratio and at a speed of the engine below a minimum speed of the engine at which a maximum torque plateau for the low transmission ratio is reached, and when there is or will, within a predetermined time, be a reduced need for power output to propel the vehicle, the method comprising:
- determining a speed parameter for the vehicle;
- and
- switching the gearbox to a higher transmission ratio, which is higher than the low transmission ratio, when the speed parameter fulfills a first criterion.
A non-transitory computer-readable medium containing computer instructions stored therein for causing a computer processor to apply a method for control of a gearbox of a vehicle wherein the gearbox is connected to a combustion engine of the vehicle and the gearbox can be set to a number of different transmission ratios, wherein the method is performed:
- when the vehicle is running in a low transmission ratio and at a speed of the engine below a minimum speed of the engine at which a maximum torque plateau for the low transmission ratio is reached, and when there is or will, within a predetermined time, be a reduced need for power output to propel the vehicle, the method comprising:
- determining a speed parameter for the vehicle;
- and
- switching the gearbox to a higher transmission ratio, which is higher than the low transmission ratio, when the speed parameter fulfills a first criterion.
A system for control of a gearbox of a vehicle wherein the gearbox is connected to a combustion engine and the gearbox can be set to a number of different transmission ratios, the system comprising:
- a speed determining device configured to determine a speed parameter for the vehicle;
- and
- a device configured to switch the gearbox to a transmission ratio which is higher than a low transmission ratio when the speed parameter fulfills a first criterion,
- the system being configured to run the vehicle in the low transmission ratio and at a speed of the engine below a minimum speed of the engine at which a maximum torque plateau for the low transmission ratio is reached when there is or will, within a predetermined time, be a reduced need for power output to propel the vehicle.
A vehicle comprising:
- a gearbox of the vehicle wherein the gearbox is connected to a combustion engine and the gearbox can be set to a number of different transmission ratios;
- a speed determining device configured to determine a speed parameter for the vehicle;
- and
- a device configured to switch the gearbox to a transmission ratio which is higher than a low transmission ratio when the speed parameter fulfills a first criterion, wherein
- the vehicle is configured to run in the low transmission ratio and at a speed of the engine below a minimum speed of the engine at which a maximum torque plateau for the low transmission ratio is reached when there is or will, within a predetermined time, be a reduced need for power output to propel the vehicle.
Dependencies are inferred from the claim text.