Vehicle stabilization for a hybrid vehicle in the event of brake slip of the drive wheels or increased risk thereof
First Claim
1. A method for vehicle stabilization of a hybrid vehicle when a braking torque of an internal combustion engine is present, the hybrid vehicle having said internal combustion engine and an electric motor as drive motors, and having a clutch, between the internal combustion engine and the electric motor, by which torque of the internal combustion engine is decoupleable from drive wheels of the hybrid vehicle, the method comprising the acts of:
- recognizing a vehicle condition indicative of brake slip of the drive wheels or an increased risk of the brake slip of the drive wheels of the hybrid vehicle; and
in response to the vehicle condition being recognized, releasing the clutch between the internal combustion engine and the electric motor and increasing a negative torque of the electric motor in a direction of positive torque values, whereinthe torque of the electric motor is negative;
i) before the clutch between the internal combustion engine and the electric motor is released, and ii) before the torque of the electric motor is increased.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and system are provided for vehicle stabilization of a hybrid vehicle in an event of brake slip of the drive wheels or an increased risk thereof. The method presupposes that the hybrid vehicle includes, between the internal combustion engine and the electric motor, a clutch by which the torque of the internal combustion engine can be decoupled from the drive wheels. With the clutch engaged, the resulting torque on the electric motor is produced by the torque of the internal combustion engine and the torque of the electric motor. The presence of a specific vehicle condition indicative of brake slip of the drive wheels or a risk thereof is recognized. If such a vehicle condition is recognized, the clutch between the internal combustion engine and the electric motor is released and the torque of the electric motor is increased.
34 Citations
10 Claims
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1. A method for vehicle stabilization of a hybrid vehicle when a braking torque of an internal combustion engine is present, the hybrid vehicle having said internal combustion engine and an electric motor as drive motors, and having a clutch, between the internal combustion engine and the electric motor, by which torque of the internal combustion engine is decoupleable from drive wheels of the hybrid vehicle, the method comprising the acts of:
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recognizing a vehicle condition indicative of brake slip of the drive wheels or an increased risk of the brake slip of the drive wheels of the hybrid vehicle; and in response to the vehicle condition being recognized, releasing the clutch between the internal combustion engine and the electric motor and increasing a negative torque of the electric motor in a direction of positive torque values, wherein the torque of the electric motor is negative;
i) before the clutch between the internal combustion engine and the electric motor is released, and ii) before the torque of the electric motor is increased. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of stabilizing a hybrid vehicle, the method comprising the acts of:
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generating a torque for drive wheels via an internal combustion engine and an electric motor of the hybrid vehicle, the internal combustion engine and the electric motor being connected in series such that a resulting torque at the electric motor results from a torque of the internal combustion engine and a torque of the electric motor; detecting brake slip of the drive wheels of the vehicle or a risk of brake slip; and upon detecting the brake slip or the risk of brake slip, releasing a clutch arranged between the internal combustion engine and the electric motor and increasing a negative torque of the electric motor in a direction of positive torque values, wherein the torque of the electric motor is negative;
i) before the clutch between the internal combustion engine and the electric motor is released, and ii) before the torque of the electric motor is increased.
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9. A system for vehicle stabilization of a hybrid vehicle, comprising:
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an internal combustion engine of the hybrid vehicle; an electric motor of the hybrid vehicle, the electric motor and the internal combustion engine being drive motors for the hybrid vehicle; a clutch arranged between the internal combustion engine and the electric motor by which torque of the internal combustion engine is decoupleable from drive wheels of the hybrid vehicle, wherein with the clutch engaged the torque on the electric motor results from the torque of the internal combustion engine and the torque of the electric motor; and a control unit operatively configured to detect a vehicle condition indicative of brake slip of the drive wheels or a risk of brake slip and, in response to detecting the vehicle condition, the control unit is operatively configured to release the clutch between the internal combustion engine and the electric motor and to increase a negative torque of the electric motor in a direction of positive torque values, wherein the torque of the electric motor is negative;
i) before the clutch between the internal combustion engine and the electric motor is released, and ii) before the torque of the electric motor is increased. - View Dependent Claims (10)
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Specification