Method for controlling and regulating a power train of a hybrid vehicle and power train of a hybrid vehicle
First Claim
1. A method of controlling and regulating a power train (1) of a hybrid vehicle having one internal combustion engine (2), an electric machine (3), a shifting element (11) with a continuously variable transmitting capacity which is disposed in a power flow of the power train (1) between the electric machine (3) and an output (5) of the power train (1), and a clutch device (7) located between the electric machine (3) and the internal combustion engine (2) which facilitates operative connection of the internal combustion engine (2) with the electric machine (3) so that the hybrid vehicle can optionally be driven by at least one of the electric machine (3) and the internal combustion engine (2), the method comprising the steps of:
- establishing the operative connection by actuation of the clutch device (7), during a starting operation of the internal combustion engine (2), between the electric machine (3) and the internal combustion engine (2) to start the internal combustion engine (2) by operation of the electric machine (3),adjusting a transmitting capacity of the shifting element (11), during the starting operation of the internal combustion engine (2), so that a torque, independent of the starting operation of the internal combustion engine (2), is transmitted to an output of the power train (1), andduring a traction operation of the power train (1), when the clutch device (7) has a transmitting capacity at which essentially no torque can be conveyed via the clutch device (7),increasing an input torque of the electric machine (3), during the starting operation of the internal combustion engine (2), and adjusting the transmitting capacity of the shifting element (11) so that a torque independent of an increase of the input torque of the electric machine (3) is transmitted to the output of the power train (1).
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Accused Products
Abstract
A method for controlling and regulating a power train of a hybrid vehicle and a power train of a hybrid vehicle having one internal combustion engine, one electric machine, one shifting element and one output in a power flow of the power train and designed with continuously variable transmitting capacity and one clutch device and the internal combustion engine. The electric machine can be operatively interconnected via the clutch device, the hybrid vehicle being optionally driveable via the electric machine and/or via the internal combustion engine and the internal combustion engine can be started via the electric machine. In the operation of the power train, the transmitting capacity of the shifting element during the starting operation of the internal combustion engine is adjusted so that on the output of the power train, a torque abuts which is independent of the starting operation of the internal combustion engine.
66 Citations
17 Claims
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1. A method of controlling and regulating a power train (1) of a hybrid vehicle having one internal combustion engine (2), an electric machine (3), a shifting element (11) with a continuously variable transmitting capacity which is disposed in a power flow of the power train (1) between the electric machine (3) and an output (5) of the power train (1), and a clutch device (7) located between the electric machine (3) and the internal combustion engine (2) which facilitates operative connection of the internal combustion engine (2) with the electric machine (3) so that the hybrid vehicle can optionally be driven by at least one of the electric machine (3) and the internal combustion engine (2), the method comprising the steps of:
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establishing the operative connection by actuation of the clutch device (7), during a starting operation of the internal combustion engine (2), between the electric machine (3) and the internal combustion engine (2) to start the internal combustion engine (2) by operation of the electric machine (3), adjusting a transmitting capacity of the shifting element (11), during the starting operation of the internal combustion engine (2), so that a torque, independent of the starting operation of the internal combustion engine (2), is transmitted to an output of the power train (1), and during a traction operation of the power train (1), when the clutch device (7) has a transmitting capacity at which essentially no torque can be conveyed via the clutch device (7), increasing an input torque of the electric machine (3), during the starting operation of the internal combustion engine (2), and adjusting the transmitting capacity of the shifting element (11) so that a torque independent of an increase of the input torque of the electric machine (3) is transmitted to the output of the power train (1). - View Dependent Claims (2)
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3. A method of controlling and regulating a power train (1) of a hybrid vehicle having one internal combustion engine (2), an electric machine (3), a shifting element (11) with a continuously variable transmitting capacity which is disposed in a power flow of the power train (1) between the electric machine (3) and an output (5) of the power train (1), and a clutch device (7) located between the electric machine (3) and the internal combustion engine (2) which facilitates operative connection of the internal combustion engine (2) with the electric machine (3) so that the hybrid vehicle can optionally be driven by at least one of the electric machine (3) and the internal combustion engine (2), the method comprising the steps of:
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establishing the operative connection by actuation of the clutch device (7), during a starting operation of the internal combustion engine (7), between the electric machine (3) and the internal combustion engine (2) to start the internal combustion engine (7) by operation of the electric machine (3), adjusting a transmitting capacity of the shifting element (11), during the starting operation of the internal combustion engine (7), so that a torque, independent of the starting operation of the internal combustion engine (2), is transmitted to an output of the power train (1), and increasing an input torque of the electric machine (3) to a rotational speed value (n_KSG_max) equivalent to a rotatory energy of the electric machine (3) required to start the internal combustion engine (2). - View Dependent Claims (4, 5, 9, 10, 11)
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6. A method of controlling and regulating a power train (1) of a hybrid vehicle having one internal combustion engine (2), an electric machine (3), a shifting element (11) with a continuously variable transmitting capacity which is disposed in a power flow of the power train (1) between the electric machine (3) and an output (5) of the power train (1), and a clutch device (7) located between the electric machine (3) and the internal combustion engine (2) which facilitates operative connection of the internal combustion engine (2) with the electric machine (3) so that the hybrid vehicle can optionally be driven by at least one of the electric machine (3) and the internal combustion engine (2), the method comprising the steps of:
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establishing the operative connection by actuation of the clutch device (7), during a starting operation of the internal combustion engine (2), between the electric machine (3) and the internal combustion engine (2) to start the internal combustion engine (2) by operation of the electric machine (3), adjusting a transmitting capacity of the shifting element (11), during the starting operation of the internal combustion engine (2), so that a torque, independent of the starting operation of the internal combustion engine (2), is transmitted to an output of the power train (1), and during a starting operation occurring during a coasting operation of the drive train (1), adjusting the transmitting capacity of the shifting element (1), during the starting operation of the internal combustion engine (2), so that a reduction of an input torque of the electric machine (3) occurring during the starting operation of the internal combustion engine (2) in an area of the shifting element (11) is compensated by a slip operation of the shifting element (11). - View Dependent Claims (7, 8)
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12. A power train (1) of a hybrid vehicle, comprising:
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an internal combustion engine (2), an electric machine (3), a transmission (4) having a shifting element (11) having a continuously variable transmitting capacity and disposed in a power flow of the power train (1) between the electric machine (3) and an output (5), and a clutch device (7) situated between the electric machine (3) and the internal combustion engine (2) by which the electric machine (3) and the internal combustion engine (2) can be brought to operative connection, and a device (6) located between the internal combustion engine (2) and the electric machine (3) for dampening rotational irregularities and is at least partly integrated in a housing of the transmission (4), whereby the hybrid vehicle is selectably driven by at least one of the electric machine (3) and the internal combustion engine (2) and whereby the internal combustion engine (2) can be started by means of the electric machine (3) by creating a connection between the electrical machine (3) and the internal combustion engine (2) via the clutch device (7), and by one of during a starting operation of the internal combustion engine (2), adjusting the transmitting capacity of the shifting element (11) during the internal combustion engine (2) starting operation so that a torque independent of the starting operation of the internal combustion engine (2) is transmitted to an output of the power train (1), and during a coasting operation of the drive train (1), adjusting the transmitting capacity of the shifting element (1) so that a reduction of an input torque of the electric machine (3) occurring during the starting operation of the internal combustion engine (2) in an area of the shifting element (11) is compensated by a slip operation of the shifting element (11). - View Dependent Claims (13, 14, 15, 16, 17)
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Specification