| 摘要 |
Method for operating a hybrid drive, in particular a parallel hybrid drive, of a vehicle. The parallel hybrid drive includes an internal combustion engine and at least one electric drive, at least one energy storage device, and a vehicle transmission. During deceleration phases in which a torque required on the transmission input side is present, the internal combustion engine is operated either in drag mode or at a minimum drive torque. |
| 主权项 |
1. A method for operating a parallel hybrid drive of a vehicle including an internal combustion engine, at least one electric drive, at least one energy storage device, and a vehicle transmission, the method comprising:
during a deceleration phase in which a torque required on an input side of the transmission is less than zero, obtaining a value of the torque required; and based on the obtained value of the torque required, calculating energy costs respectively associated with a first mode combination and a second mode combination, wherein in each mode combination, operating modes are selected for the internal combustion engine and for the at least one electric drive; comparing the energy cost of the first mode combination to the energy cost of the second mode combination; and based on the comparison, selecting either the first mode combination or the second mode combination; wherein in the first mode combination, the internal combustion engine is selected to be operated in a drag mode, and wherein in the second mode combination, the internal combustion engine is selected to be operated in a minimum drive torque mode; wherein in the first mode combination, the at least one electric drive is selected to be operated in an engine mode in which the at least one electric drive provides a positive torque, wherein in the second mode combination, the at least one electric drive is selected to be operated in a generator mode in which the at least one electric drive charges the at least one energy storage device, and wherein the comparison is based on C1=EEM,1·CBatt,wherein:
C1: cost of drawing energy from the energy storage device; EEM,1: energy drawn from the electric machine in engine mode; CBatt: energy cost; and of energy fed to the at least one energy storage device based onC2=CVB-EEM,2·CVBEVB,internal,andwherein:
C2: cost of fed energy; EEM,2: energy fed to the energy storage device when the electric machine is operated in generator mode; CVB: drive energy of the internal combustion engine; and EVB,internal: internal energy of the internal combustion engine.
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