Assistance system for a motor vehicle comprising a chassis component

Abstract

The invention relates to an assistance system for motor vehicles 10, which, in the event of a tire pressure loss, activates at least one active chassis device in order to transfer the vehicle 10 into a safe driving state. The yaw moment 105 generated by a damaged tire 104 is compensated by the active chassis device, with a check for faultless function being carried out before activation. If an active chassis device is not sufficiently capable of restoring a safe driving state, additional ones can be activated. An active chassis device can in particular be an active roll stabilization system 18, 20 on the front and / or rear axle, a braking system 28 with wheel brakes 30, a drive device for accelerating at least one vehicle wheel, or a steering system on the front and / or rear axle.

Claims

[1] Assistance system for a motor vehicle (10), comprising at least one active chassis device and a device for detecting a loss of tyre pressure, characterized by that the assistance system is designed to control the at least one active chassis device in the event of a tire pressure loss in order to transfer the motor vehicle (10) into a safe driving state. [2] Assistance system for a motor vehicle (10) according to claim 1, characterized by that the transition to the safe driving condition is based on a measure to generate a counter-yaw moment in order to compensate for a yaw moment 105 generated by the tire pressure loss. [3] Assistance system for a motor vehicle (10) according to claim 1 or 2, characterized by that before the at least one active chassis device is activated, the at least one active chassis device is checked for fault-free function. [4] Assistance system for a motor vehicle (10) according to one of the preceding claims, characterized by that before the at least one active chassis device is activated, the required counter-yaw moment for transferring to the safe driving state is calculated, wherein a maximum counter-yaw moment that can be applied to the at least one first active chassis device is calculated before the activation. [5] Assistance system for a motor vehicle (10) according to one of the preceding claims, characterized by that in addition to the at least one active landing gear device, further landing gear devices are controlled if the required counter-yaw moment of an active landing gear device is not sufficient to transfer to the safe driving state. [6] Assistance system for a motor vehicle (10) according to one of the preceding claims, characterized by that the vehicle is only brought into a safe driving condition if the tire pressure loss exceeds a threshold value. [7] Assistance system for a motor vehicle (10) according to one of the preceding claims, characterized by that the at least one active chassis device is a steering device, wherein the steering device is designed to change the steering angle of at least one vehicle wheel (16) on at least one of the axles of the vehicle. [8] Assistance system for a motor vehicle (10) according to one of the preceding claims, characterized by that the at least one active chassis device is a roll stabilization system (18, 20). [9] Assistance system for a motor vehicle (10) according to one of the preceding claims, characterized by that the at least one active chassis device is a braking device (28) with at least one wheel brake (30), wherein the braking device (28) controls the at least one wheel brake (30) in such a way that one or more vehicle wheels of the motor vehicle (10) are decelerated. [10] Assistance system for a motor vehicle (10) according to one of the preceding claims, characterized by that the at least active chassis device is a control unit which is designed to control one or more wheel-individual drive devices, wherein one or more vehicle wheels of the motor vehicle (10) are accelerated. [11] Assistance system for a motor vehicle (10) according to one of the preceding claims, characterized by that the safe driving condition is assessed at least on the basis of a rotation, pitch or yaw rate of the motor vehicle (10). [12] Assistance system for a motor vehicle (10) according to one of the preceding claims, characterized by that an optical or acoustic signal can be generated in the event of a tire pressure loss. [13] Assistance system for a motor vehicle (10) according to one of the preceding claims, characterized bythat in the event of a loss of tire pressure, the engine control unit limits the engine power of the motor vehicle (10). [14] Motor vehicle (10) comprising an assistance system according to one of claims 1 to 13.

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