Method for controlling suspension system

Patent metadata

Field	Value
Publication number	US-2016107499-A1
Application number	US-201414570733-A
Country	US
Kind code	A1
Filing date	Dec 15, 2014
Priority date	Oct 15, 2014
Publication date	Apr 21, 2016
Grant date	—

Abstract

A method for controlling a suspension system includes controlling an electronic controlled suspension device (ECS) and an active roll stabilizer (ARS) of a vehicle based on an input sensor value and a driving operation of the vehicle, the input sensor value is based on a road condition and wherein the driving operation is one of a straight driving, a normal turning, and an urgent turning of the vehicle.

First claim

What is claimed is:

1 . A method for controlling a suspension system, the method comprising controlling an electronic controlled suspension device (ECS) and an active roll stabilizer (ARS) of a vehicle based on an input sensor value and a driving operation of the vehicle,
wherein the input sensor value is based on a road condition and wherein the driving operation is one of a straight driving, a normal turning, and an urgent turning of the vehicle.

2 . The method according to claim 1 , wherein, during the straight driving of the vehicle, when a road input signal is not generated from a road, a control mode of the ECS is a soft damping mode and a control mode of the ARS is a decouple control mode.

3 . The method according to claim 1 , wherein, during the straight driving of the vehicle, when a road input signal is generated from a road, a control mode of the ECS is a sky hook control mode, and a control mode of the ARS is a roll damping control mode.

4 . The method according to claim 1 , wherein, during the normal turning of the vehicle, when a road input signal is not generated from a road, each of a control mode of the ECS and a control mode of the ARS is a roll control mode.

5 . The method according to claim 1 , wherein, during the normal turning of the vehicle, when a road input signal is generated from a road, a control mode of the ECS is a sky hook control mode, and a control mode of the ARS is a roll control mode.

6 . The method according to claim 1 , wherein, during the urgent turning of the vehicle, when a road input signal is not generated from a road, each of a control mode of the ECS and a control mode of the ARS is a turning limit US/OS control mode.

7 . The method according to claim 1 , wherein, during the urgent turning of the vehicle, when a road input signal is generated from a road, a control mode of the ECS is a sky hook control mode, and a control mode of the ARS is a turning limit US/OS control mode.

8 . A method for controlling a suspension system, the method comprising:
determining whether straight driving or turning is being performed; determining a road condition; and setting a control mode of an electronic controlled suspension device (ECS) and a control mode of an active roll stabilizer (ARS).

9 . The method of claim 8 further comprising determining a roll control moment and a yaw control moment.

10 . The method of claim 9 , further comprising,
if it is determined that straight driving is being performed and if a road input signal is detected: extracting a low frequency road; and determining a roll damping force.

11 . The method of claim 9 , wherein the step of determining the road condition comprises:
determining a standardized average vehicle body acceleration; determining a standardized value of a difference between right and left vehicle body accelerations; determining a standardized wheel acceleration; computing the average of the standardized average vehicle body acceleration, the standardized value of the difference between the right and left vehicle body accelerations, and the standardized wheel acceleration; and outputting a road roughness value.

12 . The method of claim 9 , wherein the step of determining a roll control moment and a yaw control moment comprises:
computing a yaw moment amount M zeq using an equation, wherein the equation is

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Assignees

• Hyundai Motor Co Ltd

Inventors

• Cho Jae Sung

Classifications

• B60G17/00

  Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load {(levelling or stabilising systems for tippers B60P1/045)} · CPC title

• B60G17/0161 Primary

  mainly during straight-line motion (B60G17/0164 takes precedence) · CPC title

• B60G17/0162

  mainly during a motion involving steering operation, e.g. cornering, overtaking (B60G17/0164 takes precedence) · CPC title

• B60G2400/10

  Acceleration; Deceleration · CPC title

• B60G17/056

  Regulating distributors or valves {for hydropneumatic systems}(B60G17/044 - B60G17/048, {B60G17/0416} take precedence; {Fluid interconnection systems to control vehicle inclination B60G21/06, B60G21/10}; valves per se F16K) · CPC title