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Method for estimating over turn risk of vehicle

A car, dangerous technology, applied in the direction of suspension, brakes, etc., which can solve the problems of wheel tipping, locking hazards, etc.

Inactive Publication Date: 2006-09-13
KNORR-BREMSE SYST FUER NUTZFAHRZEUGE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, it is monitored whether the test braking force at the relevant wheel would lead to an intervention of the ABS, that is to say a risk of locking, which would indicate that only a small wheel support force is still present, ie the wheel has lifted from the road and there is a risk of tipping over

Method used

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  • Method for estimating over turn risk of vehicle
  • Method for estimating over turn risk of vehicle
  • Method for estimating over turn risk of vehicle

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0023] The starting point when assessing the risk of a vehicle tipping over is to determine the vehicle's lateral acceleration a quer , which can be realized, for example, by a lateral acceleration sensor installed in the vehicle.

[0024] figure 1 represents a flow chart for assessing the tipping hazard of an unbraked vehicle, where the lateral acceleration a of the vehicle is determined in step 1 quer . "Unbraked" means that no braking request signal is received from the driver. The lateral acceleration a of the car felt in step 2 quer with a predetermined lateral acceleration value a quer max Compare. If the perceived lateral acceleration of the vehicle a guer Less than or equal to the specified vehicle lateral speed value a quer max , which means that there is no danger of dumping. If the car continues to not brake, return to step 1.

[0025] If the perceived lateral acceleration of the vehicle a quer Greater than the specified vehicle lateral acceleration value ...

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PUM

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Abstract

The invention relates to a method for redundantly estimating, i.e. by means of various sub-methods, the risk of lateral overturn of a vehicle. One sub-method involves estimating the risk of overturn according to the actual braking state of the vehicle - braking or strong braking, or not braking or slight braking - by monitoring the rotational speed behaviour of the wheels on the inside of the turn. Another sub-method involves pre-calculating the rolling motion of the vehicle about the longitudinal axis thereof over a short time span of, for example, 0.5 s to 1.5 s on the basis of instantaneous movement parameters and assessing the risk of overturn on the basis of the anticipated rolling motion.

Description

technical field [0001] The invention relates to a method for assessing the risk of a vehicle tipping over. Background technique [0002] Such a method is known from DE-A-19751891. There, the measurement signals from the wheel speed sensors, lateral acceleration sensors, sideslip rate sensors and steering angle sensors are evaluated to determine the risk of tipping over. Depending on the variant, some of these sensors can also be omitted and their information determined from the wheel speed sensors when using a specific controller, such as a brake slip controller. A braking torque and / or a drive torque is briefly generated or changed at a wheel that is at risk of lifting, so that it can be derived from the wheel speed behavior whether there is an imminent risk of tipping over. [0003] DE 19602879 C1 discloses a method for detecting the risk of tipping of a motor vehicle equipped with ABS, in which the lateral acceleration of the motor vehicle is continuously monitored. If...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/00B60T8/32B60T8/58B60T8/1755
CPCB60T8/17554B60G2800/0124B60T8/17551B60T2230/03B60G2800/922B60G2800/215
Inventor 盖尔盖伊·绍博托马什·多哈尼瓦莱·梅尔扎
Owner KNORR-BREMSE SYST FUER NUTZFAHRZEUGE GMBH