Coasting operation for a vehicle with a hybrid drive
AssigneeVitesco Technologies GmbH
InventorsStefan Lauer, Srinivasa Sunil Reddy, Simon Baensch, Magdalena Vieracker
Life of this patent
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Abstract
Various embodiments include a method for operating a hybrid drive train for a motor vehicle having an output shaft from an internal combustion engine releasably connected to a shaft of an electric traction machine via a first clutch, wherein the shaft of the electric traction machine is releasably connected to a transmission input shaft via a second clutch. The method may comprise: determining a state parameter for the motor vehicle; and opening either the first clutch or the second clutch for a changeover to coasting operation of the hybrid drive train based on a function of one or more state parameters.
Claims9
A method for operating a hybrid drive train for a motor vehicle having an output shaft from an internal combustion engine releasably connected to a shaft of an electric traction machine via a first clutch, wherein the shaft of the electric traction machine is releasably connected to a transmission input shaft via a second clutch, the method comprising:
- determining a state parameter for the motor vehicle;
- and
- opening only one of either the first clutch or the second clutch for a changeover to coasting operation of the hybrid drive train based on a function of one or more state parameters;
- wherein the state parameter is selected from a group consisting of:
- a vehicle mass, a traffic condition related to the geographical position of the vehicle, a weather condition, a coefficient of friction between the roadway and the vehicle, a preference of a driver, and a defect in one of the first and second clutches.
A control device in a motor vehicle with a hybrid drive train having an output shaft of an internal combustion engine releasably connected to a shaft of an electric traction machine via a first clutch, wherein the shaft of the electric traction machine is releasably connected to at least one transmission input shaft via a second clutch, the control device comprising:
- a memory storing a set of instructions;
- and
- a processor in communication with memory;
- wherein the set of instructions, when loaded and executed by the processor, cause the processor to:
- determine a state parameter for the motor vehicle;
- and
- open only one of either the first clutch or the second clutch for a changeover to coasting operation of the hybrid drive train based on a function of one or more state parameters;
- wherein the state parameter is selected from a group consisting of:
- a vehicle mass, a traffic condition related to the geographical position of the vehicle, a weather condition, a coefficient of friction between a roadway and the vehicle, a preference of a driver, and a defect in one of the first and second clutches.
A motor vehicle comprising:
- an internal combustion engine;
- an electric traction machine;
- a first clutch releasably connecting an output shaft of the internal combustion engine to a shaft of the electric traction machine;
- and
- a second clutch releasably connecting the shaft of the electric traction machine to a transmission input shaft;
- and
- a control device comprising:
- a memory storing a set of instructions, and a processor in communication with memory;
- wherein the set of instructions, when loaded and executed by the processor, cause the processor to:
- determine a state parameter for the motor vehicle;
- and
- open only one of either the first clutch or the second clutch for a changeover to coasting operation of the hybrid drive train based on a function of one or more state parameters;
- wherein the state parameter is selected from a group consisting of:
- a vehicle mass, a traffic condition related to geographical position of the vehicle, a weather condition, a coefficient of friction between a roadway and the vehicle, a preference of a driver, and a defect in one of the first and second clutches.
Dependencies are inferred from the claim text.