Method for controlling a hybrid vehicle driveline
First Claim
1. A method to control a hybrid powertrain, comprising a combustion engine;
- a gearbox with an input shaft and an output shaft, which combustion engine is connected to the input shaft;
a first planetary gear, which is connected to the input shaft;
a second planetary gear, connected to the first planetary gear;
a first electrical machine, connected to the first planetary gear;
a second electrical machine (16), 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, which gear pairs are connected to the output shaft via a countershaft, said method comprising the steps;
a) engaging gears in the gearbox, corresponding to the at least one gear pair, which is connected with the first planetary gear, and the at least one gear pair, which is connected with the second planetary gear and the output shaft;
b) connecting two rotatable components in the second planetary gear with a coupling device;
f) locking a coupling mechanism, which is arranged between the first planetary gear and the output shaft, by controlling the combustion engine, in such a way that a synchronous rotational speed is achieved between the first planetary gear and the output shaft;
g) activating the first electrical machine, so that the first electrical machine generates a propulsion torque on the output shaft via the coupling mechanism;
h) disconnecting the at least one gear pair, which is connected with the second planetary gear and the output shaft, from the countershaft which gear pair was connected in step a), by controlling the second electrical machine and the combustion engine, connected with the first planetary gear, in such a way that a zero torque state is achieved between the at least one gear pair, which is connected on the countershaft and which is connected with the second planetary gear and the output shaft, and the countershaft;
i) connecting the at least one gear pair, which is connected with the second planetary gear and the output shaft which gear pair was not connected in step a), to the countershaft, by controlling the combustion engine in such a way that a synchronous rotation speed is achieved between the at least one gear pair, which is connected with the second planetary gear and the output shaft, and which gear pair was not connected in step a), and the countershaft; and
j) controlling the second electrical machine and the combustion engine, connected with the first planetary gear, in order to generate a propulsion torque on the output shaft.
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Accused Products
Abstract
A method is provided to control a hybrid powertrain, comprising a combustion engine; a gearbox with input and output shafts, which combustion engine is connected to the input shaft; a first planetary gear connected to the input shaft; a second planetary gear connected to the first planetary gear; first and second electrical machines respectfully connected to the first and second planetary gears; first gear pair connected with the first planetary gear and output shaft; and second gear pair connected with the second planetary gear and output shaft. The method comprises: a) engaging gears in the first and second gear pairs; and b) connecting two rotatable components in the second planetary gear with a second coupling device.
94 Citations
8 Claims
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1. A method to control a hybrid powertrain, comprising a combustion engine;
- a gearbox with an input shaft and an output shaft, which combustion engine is connected to the input shaft;
a first planetary gear, which is connected to the input shaft;
a second planetary gear, connected to the first planetary gear;
a first electrical machine, connected to the first planetary gear;
a second electrical machine (16), 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, which gear pairs are connected to the output shaft via a countershaft, said method comprising the steps;a) engaging gears in the gearbox, corresponding to the at least one gear pair, which is connected with the first planetary gear, and the at least one gear pair, which is connected with the second planetary gear and the output shaft; b) connecting two rotatable components in the second planetary gear with a coupling device; f) locking a coupling mechanism, which is arranged between the first planetary gear and the output shaft, by controlling the combustion engine, in such a way that a synchronous rotational speed is achieved between the first planetary gear and the output shaft; g) activating the first electrical machine, so that the first electrical machine generates a propulsion torque on the output shaft via the coupling mechanism; h) disconnecting the at least one gear pair, which is connected with the second planetary gear and the output shaft, from the countershaft which gear pair was connected in step a), by controlling the second electrical machine and the combustion engine, connected with the first planetary gear, in such a way that a zero torque state is achieved between the at least one gear pair, which is connected on the countershaft and which is connected with the second planetary gear and the output shaft, and the countershaft; i) connecting the at least one gear pair, which is connected with the second planetary gear and the output shaft which gear pair was not connected in step a), to the countershaft, by controlling the combustion engine in such a way that a synchronous rotation speed is achieved between the at least one gear pair, which is connected with the second planetary gear and the output shaft, and which gear pair was not connected in step a), and the countershaft; and j) controlling the second electrical machine and the combustion engine, connected with the first planetary gear, in order to generate a propulsion torque on the output shaft. - View Dependent Claims (2, 3, 4, 5, 6)
- a gearbox with an input shaft and an output shaft, which combustion engine is connected to the input 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, which combustion engine is connected to the input shaft; a first planetary gear, which is connected to the input shaft; a second planetary gear, connected to the first planetary gear; 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, which gear pairs are connected to the output shaft via a countershaft; and an electronic control device configured for; a) engaging gears in the gearbox, corresponding to the at least one gear pair, which is connected with the first planetary gear, and the at least one gear pair, which is connected with the second planetary gear and the output shaft; b) connecting two rotatable components in the second planetary gear with a coupling device; f) locking a coupling mechanism, which is arranged between the first planetary gear and the output shaft, by controlling the combustion engine, in such a way that a synchronous rotational speed is achieved between the first planetary gear and the output shaft; g) activating the first electrical machine, so that the first electrical machine generates a propulsion torque on the output shaft via the coupling mechanism; h) disconnecting the at least one gear pair, which is connected with the second planetary gear and the output shaft, from the countershaft which gear pair was connected in step a), by controlling the second electrical machine and the combustion engine, connected with the first planetary gear, in such a way that a zero torque state is achieved between the at least one gear pair, which is connected on the countershaft and which is connected with the second planetary gear and the output shaft, and the countershaft; i) connecting the at least one gear pair, which is connected with the second planetary near and the output shaft which gear pair was not connected in step a), to the countershaft, by controlling the combustion engine in such a way that a synchronous rotation speed is achieved between the at least one gear pair, which is connected with the second planetary gear and the output shaft, and which gear pair was not connected in step a), and the countershaft; and j) controlling the second electrical machine and the combustion engine, connected with the first planetary gear, in order to generate a propulsion torque on the output shaft.
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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 control a hybrid powertrain, comprising a combustion engine;
- a gearbox with an input shaft and an output shaft, which combustion engine is connected to the input shaft;
a first planetary gear, which is connected to the input shaft;
a second planetary gear, connected to the first planetary gear;
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, which gear pairs are connected to the output shaft via a countershaft,said computer program code comprising computer instructions to cause one or more computer processors to perform the operations of; a) engaging gears in the gearbox, corresponding to the at least one gear pair, which is connected with the first planetary gear, and the at least one gear pair, which is connected with the second planetary gear and the output shaft; b) connecting two rotatable components in the second planetary gear with a coupling device; f) locking a coupling mechanism, which is arranged between the first planetary gear and the output shaft, by controlling the combustion engine, in such a way that a synchronous rotational speed is achieved between the first planetary gear and the output shaft; g) activating the first electrical machine, so that the first electrical machine generates a propulsion torque on the output shaft via the coupling mechanism; h) disconnecting the at least one gear pair, which is connected with the second planetary gear and the output shaft, from the countershaft which gear pair was connected in step a), by controlling the second electrical machine and the combustion engine, connected with the first planetary gear, in such a way that a zero torque state is achieved between the at least one gear pair, which is connected on the countershaft and which is connected with the second planetary gear and the output shaft, and the countershaft; i) connecting the at least one gear pair, which is connected with the second planetary near and the output shaft which gear pair was not connected in step a), to the countershaft, by controlling the combustion engine in such a way that a synchronous rotation speed is achieved between the at least one gear pair, which is connected with the second planetary gear and the output shaft, and which gear pair was not connected in step a), and the countershaft; and j) controlling the second electrical machine and the combustion engine, connected with the first planetary gear, in order to generate a propulsion torque on the output shaft.
- a gearbox with an input shaft and an output shaft, which combustion engine is connected to the input shaft;
Specification