sjaak active suspension

Tenneco’s Electronic Damping and Advanced Suspension portfolio

Sjaak Schel, R&D Technical Team Leader

Vehicle Dynamics Expo June, 2012

2006 2007 2008 2009 2010 2011 2012

Audi A6/A6 Allroad

2004 2005

AudiQ3BMW 3 Serie

AMG CLSVW Tiguan R

Audi Q3

BMW X3Volvo S60/V60

Mercedes:SLKCLS

Volvo XC60VW:

Passat/cc/Variant/R36Golf

TiguanEos

Scirocco

Volvo S80Ford Galaxy/S-Max

Volvo V70/XC70Ford Mondeo

Mercedes C-Class

Mercedes:E-Coupe,E-Cabrio,E-Class

AMG E-ClassVW Golf Gti/R20

Launched in production

Kinetic H2/CESsportscar

perf

orm

ance

System cost

Dual modedamping

Adaptive dampingDRiV

Semi-activedamping

Kinetic H2/CESanti-roll system

Acocar activesuspension

Portfolio

Tenneco Suspension Technologies

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System content

v

F

Performance

• Highest technology development• Active forces• Classic coil springs to carry the static

load of the vehicle• No torsion bars

Acocar active suspension

-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1-6000

-4000

-2000

0

2000

4000

6000Active damper characteristic

damper velocity [m/s]

dam

per

forc

e [N

]

Ipv = 0.3A

Ibv = 1.6A

Ibv = 0.3A

Ipv = 1.6A

PUMP1-8 l/min

ELECTRICALMOTOR 12V

CES REBOUND VALVE

CES COMPR. VALVE

REB. BLOW-OFF VALVE

COMPR. BLOW-OFF VALVE

LOCALACCUMULATOR

PRESSURE TUBE

PISTON ROD

FLEXIBLEHIGH PRES. LINE

FLEXIBLELOW PRES. LINE

NON-RETURNVALVE

• Each corner equiped with controlled hydraulic pump

• Semi-active valves to control rebound and compression damping forces

• Different operating modes, from semi-active to full-active


-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1-6000

-4000

-2000

0

2000

4000

6000Active damper characteristic


dam

per

forc

e [N

]

Ipv = 0.3A

Ibv = 1.6A

Ibv = 0.3A

Ipv = 1.6A

Pump flow 8 l/min

-1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1-6000

-4000

-2000

0

2000

4000

6000Semi-active damper characteristic


dam

per

forc

e [N

]

Ibv = 0.3A

Ibv = 1.6A

Ipv = 1.6A

Ipv = 0.3A

Pump flow 0 l/min


Weight & packageOverall weight comparable to std vehicle

No anti-roll barsLightweight

CostValue for money

Target platforms:High end limousines and GT-cars

PerformanceHighest level suspension performance

System operates also in active quadrantsSuperior comfort combined with excellent handling

Energy consumptionLow energy consumptionDynamic control of pump flow


Kinetic H2/CES anti-roll system

• 4 corner actuators connected with hydraulic lines => passive anti-roll system

• Semi-active valves to control damping• Switch on dashboard to select driver

preference• Ability to adjust roll stiffness depending on

system pressure• Classic coil springs to carry the static load

of the vehicle• No torsion bars

v

F

Comfort valves = Closed


roll

Comfort valves = Closed


articulation

Weight & package:Adaptive damping and roll stiffness

without weight increaseNo anti-roll bars

Lightweight

CostCheaper than active roll control

& semi active dampingTarget platforms

Sport carsSUV’s

Luxurary limousines

PerformanceBest compromise between

handling, comfort and tyre gripAnti-roll & semi-active damping combined into 1

Superior articulation & traction

Energy consumptionLow energy consumption

Passive anti-roll system


Semi-active damping

• Continuously variable damping• Switch on dashboard to select driver

preference• External valve technology (3-tube)• Internal valve technology (double tube &

mono tube)

v

F

New hybrid ces valve

Pilot stage in orificecontrolled mode

Pilot stage in pressurecontrolled mode

Semi-active damping

•improved tuneability•Improved comfort

Weight & packageExcellent for light weight (int valve)

Monotube possible (int valve)

CostGood performance to cost ratio

Target platformsAll vehicles, starting from C segment

PerformanceBest compromise between

handling & comfortSwitch to select driver preference

Fully automatic system

Energy consumptionLow energy consumptionLow current during normal driving

Semi-active damping

DRiV corner

With integrated electronics

Local communication network (LIN,

PWM…)

Accelerometer (IMU) in CGExisting ECU

Preferred DRiV system layout

• 4 valves incorporated in the rodguide• Integrated electronics to control the

corner valves• Primary targeted to body control• Wheel control through passive

hydraulic damping

Adaptive damping DRiV

-1000

-750

-500

-250

0

250

500

750

1000

1250

1500

-1,500 -1,000 -0,500 0,000 0,500 1,000 1,500

Damper Velocity [m/sec]

Dam

per

Forc

e [N

]

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

Base GTI

Weight & packageAlmost “conventional” packaging

Suitable for integrated chassis control

CostLower system cost vs semi-actice

Target platformsSmall & midsize vehicles

PerformanceAffordable adjustable damping

Switch on dashboard to select driver preferenceFully automatic system

Improved comfort & handling16 damping stages


Latching valve technology

Adaptive damping DRiV

Compression

0

10

20

30

40

50

60

70

80

90

100

0.000 0.100 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900 1.000

Vel [m/s]

Forc

e [d

aN]

Rebound

0

20

40

60

80

100

120

140

160

180

200

0.000 0.100 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900 1.000

Vel [m/s]

Forc

e [d

aN]

• 2 damping modes: soft & firm• Driver can select between 2 damping

settings• No ECU required• Internal valve technology (double

tube & mono tube)

Dual mode damping

Weight & packageExcellent for light weight (int valve)

Monotube possible (int valve)No ECU

CostLowest cost electronic damping

Target platformsEconomic vehicles

Performance1 step up vs passive damping

Driver can select 2 damping characteristics2 vehicles in 1


Low hold current

Dual mode damping

sjaak active suspension

Documents

active roll control

activeacocar active

roll stiffness

variable damping switch

tennecos electronic

torsion barsv f comfort

static load

apump flow