Method for controlling a hybrid driveline in order to optimize torque from a combustion engine arranged at the driveline
First Claim
1. A method to control a hybrid powertrain to optimize the torque from a combustion engine, arranged in the hybrid powertrain, wherein the hybrid powertrain also comprises;
- a gearbox with an input shaft and an output shaft;
a first planetary gear, connected to the input shaft and a first main shaft;
a second planetary gear, connected to the first planetary gear and a second main shaft;
a first electrical machine, connected to the first planetary gear;
a second electrical machine, connected to the second planetary gear;
at least one gear pair connected with the first planetary gear and the output shaft; and
at least one gear pair connected with the second planetary gear and the output shaft, wherein the combustion engine is connected with a first planetary wheel carrier, arranged in the first planetary gear via the input shaft of the gearbox, and wherein the second main shaft is connected with a planetary wheel carrier, arranged in the second planetary gear, said method comprising the steps;
a) if connected, disconnecting the moveable parts of the first planetary gear from each other and the moveable parts of the second planetary gear from each other;
b) to control the combustion engine to a predetermined engine speed (nice); and
c) to control the first and the second electrical machines in such a way that a desired torque (TDrv) is achieved in the output shaft, while simultaneously a requested total power consumption (PEM) of the first and the second electrical machines is achieved.
1 Assignment
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Accused Products
Abstract
A method is provided to control a hybrid powertrain that comprises: a combustion engine; a gearbox with input and output shafts; a first planetary gear connected to the input shaft and a first main shaft; a second planetary gear, connected to the first planetary gear and a second main shaft; first and second electrical machines, respectively connected to the first and second planetary gears; one gear pair connected with the first planetary gear and output shaft; and one gear pair connected with the second planetary gear and output shaft. The method comprises: disconnecting a first planetary wheel carrier and a first sun wheel or disconnecting a second planetary wheel carrier and a second sun wheel from each other; b) controlling the combustion engine to a predetermined engine speed; and c) controlling the first and second electrical machines so that a desired torque is achieved in the output shaft, while a requested total power consumption of the first and the second electrical machines is achieved.
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Citations
8 Claims
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1. A method to control a hybrid powertrain to optimize the torque from a combustion engine, arranged in the hybrid powertrain, wherein the hybrid powertrain also comprises;
- a gearbox with an input shaft and an output shaft;
a first planetary gear, connected to the input shaft and a first main shaft;
a second planetary gear, connected to the first planetary gear and a second main shaft;
a first electrical machine, connected to the first planetary gear;
a second electrical machine, connected to the second planetary gear;
at least one gear pair connected with the first planetary gear and the output shaft; and
at least one gear pair connected with the second planetary gear and the output shaft, wherein the combustion engine is connected with a first planetary wheel carrier, arranged in the first planetary gear via the input shaft of the gearbox, and wherein the second main shaft is connected with a planetary wheel carrier, arranged in the second planetary gear, said method comprising the steps;a) if connected, disconnecting the moveable parts of the first planetary gear from each other and the moveable parts of the second planetary gear from each other; b) to control the combustion engine to a predetermined engine speed (nice); and c) to control the first and the second electrical machines in such a way that a desired torque (TDrv) is achieved in the output shaft, while simultaneously a requested total power consumption (PEM) of the first and the second electrical machines is achieved. - View Dependent Claims (2, 3, 4, 5, 6)
- a gearbox with an input shaft and an output shaft;
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7. A vehicle with a hybrid powertrain, said hybrid powertrain comprising:
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a combustion engine; a gearbox with an input shaft and an output shaft; a first planetary gear, connected to the input shaft and a first main shaft; a second planetary gear, connected to the first planetary gear and a second main shaft; a first electrical machine, connected to the first planetary gear; a second electrical machine, connected to the second planetary gear; at least one gear pair connected with the first planetary gear and the output shaft; at least one gear pair connected with the second planetary gear and the output shaft, wherein the combustion engine is connected with a first planetary wheel carrier, arranged in the first planetary gear via the input shaft of the gearbox, and wherein the second main shaft is connected with a planetary wheel carrier, arranged in the second planetary gear; and an electronic control device configured for; a) if connected, disconnecting the moveable parts of the first planetary gear from each other and the moveable parts of the second planetary gear from each other; b) to control the combustion engine to a predetermined engine speed (nice); and c) to control the first and the second electrical machines in such a way that a desired torque (TDrv) is achieved in the output shaft, while simultaneously a requested total power consumption (PEM) of the first and the second electrical machines is achieved.
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8. A computer program product comprising computer program code stored on a non-transitory computer readable medium readable by a computer, said computer program product used to optimize the torque from a combustion engine, arranged in the hybrid powertrain, wherein the hybrid powertrain also comprises;
- a gearbox with an input shaft and an output shaft;
a first planetary gear, connected to the input shaft and a first main shaft;
a second planetary gear, connected to the first planetary gear and a second main shaft;
a first electrical machine, connected to the first planetary gear;
a second electrical machine, connected to the second planetary gear;
at least one gear pair connected with the first planetary gear and the output shaft; and
at least one gear pair connected with the second planetary gear and the output shaft, wherein the combustion engine is connected with a first planetary wheel carrier, arranged in the first planetary gear via the input shaft of the gearbox, and wherein the second main shaft is connected with a planetary wheel carrier, arranged in the second planetary gear,said computer program code comprising computer instructions to cause one or more computer processors to perform the operations of; a) if connected, disconnecting the moveable parts of the first planetary gear from each other and the moveable parts of the second planetary gear from each other; b) to control the combustion engine to a predetermined engine speed (nice); and c) to control the first and the second electrical machines in such a way that a desired torque (TDrv) is achieved in the output shaft, while simultaneously a requested total power consumption (PEM) of the first and the second electrical machines is achieved.
- a gearbox with an input shaft and an output shaft;
Specification