ACOCAR active suspension systems
Miguel Dhaens - advanced chassis research
ONE BOLD VISION ONE EXTRAORDINARY FUTURE Agenda
6th Int conference Advanced suspension systems 2014 Wiesbaden
• TENNECO company profile
• Towards automated driving - MegaTrends for mobility - Link to suspension systems
• ACOCAR - New hydraulic layout - Working principle - Achievements to date
• VISION: next steps - Achievements to date - Future Opportunities
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 2 Tenneco Global
• Nearly 25,000 employees • 89 manufacturing facilities • 14 engineering & technical centers • 2012 Revenue $ 7.4 billion • Global Market Leader
Ride Clean Air Performance 67% 33%
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 3 Tenneco Europe
RP Light Vehicles Market Share 2012
Tenneco 22,7%
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 4 Mega trends influences future mobility
Urbanisation/ Climate change Connectivity demographic change
Intermodality to Support people Spend less Utilize Safety extend handle people to go from A to B energy for sustainable mobility for demand for hassle free & at mobility energy source aging generation mobility elevated comfort and social entertainment during travel INTELLIGENT MOBILITY
(NEAR) ZERO URBAN MOBILITY ZERO ACCIDENTS EMISSION through through telematics by stability and more efficient and and Smart Grid predictive ADAS alternative energy Integration systems
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 5 Towards automated driving
In a world where everything is possible, time becomes the bottleneck. Time spending will be optimized, even while driving!
Today
Navi Talking Internet Least Most Phone talk Music Emailing Texting often often Read & + dial Work Eat & drink
Perceived as dangerous Are already done but Regulary done while driving and (mostly) not perceived dangerous Only done during slow traffic or standstill still perceived too dangerous Tomorrow: Automated driving (mid to long term) system takes over in case of delegation by the driver relieving the driver for enjoyment increase
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 6 Towards automated driving
Our expectations of the desired information feedback is depending of time and conditions such as road surface, weather and situation and can be reverted at any time!
Handling / feedback
Comfort
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 7 Tenneco Ride Performance Products
CVSA
Conventional Conventional Strut Module
CVSA Air Spring ACOCAR Active Suspension Dual Mode
Moto / Bike Elastomers Suspension Kinetic Light Weight H2 CES
Cabine Axle damper Demper
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 8 Consumer test - Driving experience
The detailed evaluation shows a better felt performance over all criteria of driving experience for the vehicle with CVSA but especially for suspension comfort over all three segments.
Overall evaluation of driving experience
∆ ∆ ∆ Overall driving experience 25 11 21 Road holding 45 22 29 Safety 17 11 16 Flexibility (dashboard button) 29 35 33 Comfort 41 35 24 Control 23 25 33 Fun to drive 27 19 5 Agility 24 19 14 Suspension comfort 44 60 34 Lean angle in a curve 27 25 29 Acceleration 8 9 22 Braking 12 14 12 Driving stability 23 14 21 Silence of the car 12 15 18
DT8: How do you describe the overall driving experience according to the following criteria? Base: n=51 (CC), n=52 (UMC), n=52 (SUV); Top2 (‘excellent, very good”) answers in %
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 9 Agenda
6th Int conference Advanced suspension systems 2014 Wiesbaden
• TENNECO company profile
• Towards automated driving - MegaTrends for mobility - Link to suspension systems
• ACOCAR - New hydraulic layout - Working principle - Achievements to date
• VISION: next steps - Achievements to date - Future Opportunities
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 10 Monotube ACOCAR
Fully active suspension
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 11 Monotube ACOCAR
Next generation ACOCAR
ULTRA CAPACITOR CONTINUOUS CONTROLLABLE PISTON VALVE PUMP Q
CONTINUOUS CONTROLLABLE CONTINUOUS BASE VALVE CONTROLLABLE VALVES
ELECTRICAL MOTOR
ACCUMULATOR PUMP
ACCUMULATOR ELECTRICAL MOTOR
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 12 Monotube ACOCAR
Working principle: Passive rebound
velocity
Controls force
Pump standby
Soft
Rod velocity vs pump flow ONE BOLD VISION ONE EXTRAORDINARY FUTURE 13 Monotube ACOCAR
Working principle Passive compression
velocity Rod velocity vs pump flow
Soft
Pump standby
Controls force
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 14 Monotube ACOCAR
Working principle Inward force (active & passive)
velocity
Controls force
Soft
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 15 Monotube ACOCAR
Working principle Outward force (active & passive)
velocity
Soft
Controls force
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 16 Monotube ACOCAR
Working principle Low forces (active & passive)
Controls force
Soft
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 17 Monotube ACOCAR
Achievements to date
Improvements: • Increased static forces • Optimized hydraulic layout
• Even lower power consumption • More efficient use of hydraulic power • Low power standby mode with fast response time
• Significant improvements in ride performance • New clean sheet controller developed
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 18 Agenda
6th Int conference Advanced suspension systems 2014 Wiesbaden
• TENNECO company profile
• Towards automated driving - MegaTrends for mobility - Link to suspension systems
• ACOCAR - New hydraulic layout - Working principle - Achievements to date
• VISION: next steps - Achievements to date - Future Opportunities
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 19 VISION: next steps
Road surface scanning
Vision: Scanning the road upfront
• Potential: • Feedforward control for road roughness and pothole detection
Feedforward window Control signals Vision controller Acocar t actuator
Road profile Road Quarter car test setup
• Status: • Completed control strategy
• Ongoing Quarter car & four poster tests with prototype sensor
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 20 Conclusion
6th Int conference Advanced suspension systems 2014 Wiesbaden
• Increased functionality - Balancing feedback versus comfort
• Predictive controllers - Using preemptive systems - Enhanced comfort
• Future opportunities - Integration with ADAS systems
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 21 Tenneco – Technology Driver
For more info, please contact:
www.tenneco.com
ONE BOLD VISION ONE EXTRAORDINARY FUTURE 22