Vehicle Stability Control System and Method

a technology for stability control and motor vehicles, applied in vehicle position/course/altitude control, braking system, instruments, etc., can solve problems such as less reliable or capable, and inaccurate estimation

Inactive Publication Date: 2009-07-23
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]The present invention may address one or more of the above-mentioned issues. Ot

Problems solved by technology

Bosch's ESPlus® product can determine hill hold conditions when a vehicle is stopped, but may be less dependable or capable when the vehicle is moving or driving, particularly on a curved and hilly road, because hill grade is indirectly estimated thro

Method used

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  • Vehicle Stability Control System and Method
  • Vehicle Stability Control System and Method
  • Vehicle Stability Control System and Method

Examples

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Embodiment Construction

[0018]Reference will now be made to various embodiments, examples of which are illustrated in the accompanying drawings. However, these various exemplary embodiments are not intended to limit the disclosure. To the contrary, the disclosure is intended to cover alternatives, modifications, and equivalents.

[0019]Addition of a pitch rate sensor to an RSC sensor cluster can allow reliable and direct computation of a vehicle pitch angle. Vehicle pitch angle can be translated to determine road grade experienced by a driven vehicle, leading to a reliable and dependable differentiation between inclined / declined driving surfaces and level driving surfaces.

[0020]The present teachings contemplate enhancing vehicle stability control to achieve hill hold control, hill speed maintenance functions, and loss-of-control accident mitigation on a low μ surface using a 5-sensor cluster that can interact with a vehicle brake controller. Road grade information is determined and utilized to command brake ...

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PUM

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Abstract

A vehicle stability control system comprises a 5-sensor cluster and a stability controller configured to communicate with the 5-sensor cluster and receive signals corresponding to a lateral acceleration, a longitudinal acceleration, a yaw rate, a roll rate, and a pitch rate from the 5-sensor cluster. The stability controller can also be configured to determine a braking amount or a throttle amount to maintain vehicle stability. The system also comprises a brake controller configured to communicate with the stability controller and receive a braking request from the stability controller, and a throttle controller configured to communicate with the stability controller and receive a throttle request from the stability controller. The system may also comprise a braking or throttling command computed based on various scenarios detected by measured and calculated signals.

Description

FIELD [0001]The present invention relates generally to a motor vehicle stability control system that provides functions such as, for example, hill hold control, hill descent control, and other stability features such as maintaining a driver's desired velocity on inclines and declines, and reducing a vehicle's kinematic energy when the vehicle loses control.INTRODUCTION[0002]Many vehicle stability controls now include electronic stability control (ESC) and roll stability control (RSC) functions. The former is intended to control a vehicle's yaw motion and certain sideslip motion to keep the vehicle on the road, whereas the latter is intended to control the vehicle's roll motion to prevent vehicle divergence.[0003]ESC systems have recently been enhanced to include a hill hold control feature that prevents a vehicle from unintentionally rolling backward on hill starts. To do this, brake pressure can be automatically maintained or an auxiliary clutch can be engaged to prevent the vehicl...

Claims

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Application Information

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IPC IPC(8): B60W30/02B60W30/14B60W10/04B60W10/18B60W30/18
CPCB60K31/00B60T8/1755B60T2201/04B60T2201/06B60T2230/02B60W10/06B60W10/184B60W30/18118B60W2510/0225B60W2510/0604B60W2510/1005B60W2510/186B60W2520/10B60W2520/105B60W2520/125B60W2520/14B60W2520/28B60W2540/12B60W2550/142B60W2710/0677B60T7/12B60T8/17551B60W2552/15B60T7/122B60T8/17552
Inventor LU, JIANBOJOHNSON, LEONARD K.MEYERS, JOSEPH CARR
Owner FORD GLOBAL TECH LLC
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