Method for starting a combustion engine in a hybrid driveline
First Claim
1. A method to start a combustion engine in a hybrid powertrain, comprising a gearbox with an input shaft and an output shaft;
- an output shaft of the combustion engine connected to the input shaft of the gear box;
a first planetary gear connected to the input shaft and having a first planetary wheel carrier connected to the input shaft of the gear box;
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 first gear pair connected with the first planetary gear and the output shaft; and
at least one second gear pair connected with the second planetary gear and the output shaft; and
a second coupling device arranged between a second sun wheel and a second planetary wheel carrier of the second planetary gear, said method comprising;
a) engaging the second sun wheel with the second planetary wheel carrier using the second coupling device; and
b) activating the first electrical machine and the second electrical machine, so that the first and second electrical machines rotate in a direction of the output shaft of the combustion engine and so that the combustion engine starts.
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Accused Products
Abstract
A method is provided to start a combustion engine in a hybrid powertrain, comprising a gearbox with input shaft and output shaft; 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, respectively connected to the first and second planetary gears; 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. The method comprises connecting the rotatable components of the second planetary gear with each other by connecting, via a second coupling device, a second sun wheel arranged in the second planetary gear and a second planetary wheel carrier with each other, and activating the first and second electrical machines to start the combustion engine.
112 Citations
14 Claims
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1. A method to start a combustion engine in a hybrid powertrain, comprising a gearbox with an input shaft and an output shaft;
- an output shaft of the combustion engine connected to the input shaft of the gear box;
a first planetary gear connected to the input shaft and having a first planetary wheel carrier connected to the input shaft of the gear box;
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 first gear pair connected with the first planetary gear and the output shaft; and
at least one second gear pair connected with the second planetary gear and the output shaft; and
a second coupling device arranged between a second sun wheel and a second planetary wheel carrier of the second planetary gear, said method comprising;a) engaging the second sun wheel with the second planetary wheel carrier using the second coupling device; and b) activating the first electrical machine and the second electrical machine, so that the first and second electrical machines rotate in a direction of the output shaft of the combustion engine and so that the combustion engine starts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- an output shaft of the combustion engine connected to the input shaft of the gear box;
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13. A vehicle with a hybrid powertrain, said hybrid powertrain comprising:
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a gearbox with an input shaft and an output shaft, wherein an output shaft of the combustion engine is connected to the input shaft of the gear box; a first planetary gear connected to the input shaft and having a first planetary wheel carrier connected to the input shaft of the gear box; 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 first gear pair connected with the first planetary gear and the output shaft; and at least one second gear pair connected with the second planetary gear and the output shaft; a second coupling device arranged between a second sun wheel and a second planetary wheel carrier of the second planetary gear; and an electronic control device, set up to control the hybrid drive line to start the combustion engine, said electronic control device configured to; a) engage the second sun wheel with the second planetary wheel carrier using the second coupling device; and b) activate the first electrical machine and the second electrical machine, so that the first and second electrical machines rotate in a direction of the output shaft of the combustion engine and so that the combustion engine starts.
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14. A computer program product comprising computer program code stored on a non-transitory computer readable medium readable by a computer to start a combustion engine in a hybrid powertrain, comprising a gearbox with an input shaft and an output shaft;
- an output shaft of the combustion engine is connected to the input shaft of the gear box;
a first planetary gear connected to the input shaft and having a first planetary wheel carrier connected to the input shaft of the gear box;
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 first gear pair connected with the first planetary gear and the output shaft; and
at least one second gear pair connected with the second planetary gear and the output shaft; and
a second coupling device arranged between a second sun wheel and a second planetary wheel carrier of the second planetary gear,said computer program code comprising computer instructions to cause one or more computer processors to perform the operations of; a) engaging the second sun wheel with the second planetary wheel carrier using the second coupling device; and b) activating the first electrical machine and the second electrical machine, so that the first and second electrical machines rotate in a direction of the output shaft of the combustion engine and so that the combustion engine starts.
- an output shaft of the combustion engine is connected to the input shaft of the gear box;
Specification