Method and control module for controlling the drive mode of a hybrid drive to prevent jerky movements
First Claim
1. A method for controlling a drive mode of a hybrid drive of a vehicle having an internal combustion engine and at least one electric motor, comprising:
- detecting, by a control unit, a drive-mode-change signal characterizing a planned drive mode change;
determining, by a computation unit, a torque shortfall which would occur due to the planned drive mode change, wherein the determination of the torque shortfall includes detecting a load torque, wherein the load torque corresponds to the load on the hybrid drive due to the movement of the vehicle, taking into account roadway properties;
comparing, by the computation unit, the determined torque shortfall with a predetermined threshold value;
blocking, by the computation unit, the planned drive mode change if the determined torque shortfall is greater than the threshold value; and
automatically performing, by the computation unit, a drive mode change according to the drive mode change signal if the determined torque shortfall is less than the threshold value.
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Abstract
The drive mode of a hybrid drive is controlled by: detecting a drive mode change signal characterizing a planned drive mode change, and determining a torque shortfall, which would occur due to the drive mode change. Furthermore, the method provides for comparing the torque shortfall with a threshold value, and blocking a drive mode change, if the comparison step reveals that the torque shortfall is above the threshold value. Otherwise, the method provides for: automatically performing a drive mode change according to the drive mode change signal, if the comparison step reveals that the torque shortfall is not above the threshold value.
45 Citations
10 Claims
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1. A method for controlling a drive mode of a hybrid drive of a vehicle having an internal combustion engine and at least one electric motor, comprising:
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detecting, by a control unit, a drive-mode-change signal characterizing a planned drive mode change; determining, by a computation unit, a torque shortfall which would occur due to the planned drive mode change, wherein the determination of the torque shortfall includes detecting a load torque, wherein the load torque corresponds to the load on the hybrid drive due to the movement of the vehicle, taking into account roadway properties; comparing, by the computation unit, the determined torque shortfall with a predetermined threshold value; blocking, by the computation unit, the planned drive mode change if the determined torque shortfall is greater than the threshold value; and automatically performing, by the computation unit, a drive mode change according to the drive mode change signal if the determined torque shortfall is less than the threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A control unit for controlling a drive mode of a hybrid drive of a vehicle having an internal combustion engine and at least one electric motor, comprising:
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an input interface configured to input a drive-mode-change signal characterizing a planned drive mode change, a load torque and a reduction torque, wherein the reduction torque includes at least one of a starting torque and a drive torque shortfall; an output interface configured to output a drive mode control signal to control the drive mode of the hybrid drive; and a computation unit connected to the input interface and the output interface, wherein the computation unit is configured to; determine the torque shortfall which would occur due to the planned drive mode change, wherein the determination of the torque shortfall includes detecting the load torque, wherein the load torque corresponds to the load on the hybrid drive due to the movement of the vehicle, taking into account roadway properties; compare the determined torque shortfall with a predetermined threshold value; block the planned drive mode change if the determined torque shortfall is greater than the threshold value; and automatically perform a drive mode change according to the drive-mode-change signal by controlling the output of the drive mode control signal if the determined torque shortfall is less than the threshold value.
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Specification