1. CLASS® Compressible Liquid Adaptive Suspension System
The Next Generation Suspension
LIQUIDSPRING
CLASS®
Compressible
Liquid
Adaptive
Suspension
System
June 1, 2018

2. What is CLASS® ?
A patented suspension system utilizing a compressible fluid as the spring medium.
Replaces conventional vehicle springs and shock absorbers with a strut that performs the spring/damping function and utilizes an electronic control system. 2

3. CLASS® Benefits
Provides significant improvement in ride quality, handling, stability, and safety versus existing/traditional suspensions.
Additionally, it maintains a constant ride height, by adjusting for load changes. 3

4. How CLASS® Achieves Benefits
The system automatically and instantaneously varies spring stiffness and/or damping seamlessly to optimize the suspension performance for driving and road conditions without driver intervention. 4

5. Stability Control 5

6. Vibration Dose Value 6

7. How CLASS® Changes Spring Stiffness
Low Stiffness:
Rate valve allows compressible fluid to move between the strut and volume.
High Stiffness:
Rate valve prevents compressible fluid from moving between the strut and volume. 7

8. M2-106 CLASS® Suspension Suspension
5-Link suspension with lateral track bar.
Heavy duty control arm and strut bushings.
Integral mount for height sensors.
Does not require modification of exhaust system. 8

9. CLASS® Strut
Strut
Hydraulic connection to secondary fluid volume via a short hydraulic line.
Integral rebound stop.
Pre-filled with compressible fluid. 9

10. CLASS® Secondary Volume
2nd Fluid Volume
Attached to frame as unitized assembly.
Projection distance from outside of frame less than rear spring shackle.
Pre-filled with compressible fluid. 10

11. CLASS® Power Module Power Module - Control System
Contains pump, motor, manifolds, filters, valves, low pressure reservoir and ECU.
Centrally mounted on inside of vehicle frame, pre-filled with compressible fluid.
One hydraulic line going to each suspension corner for leveling vehicle.
Automotive grade wire harness with sealed connectors. 11

12. CLASS® Electronic Control
Electronic Control Unit
ECU continuously processes vehicle data (speed, steering, height, and brake) 1,000 times per second, which controls spring rates and ride height. 12

13. CLASS® Driver Interface
User-friendly driver interface provides means to change system ride modes and heights; and presents system diagnostic information. 13

14. CLASS® Simulation Tools
Kinematic Analysis
SuspensionSim
CosmosMotion
SolidWorks 14

15. CLASS® Simulation Tools
AMESim Hydraulic and vehicle simulation (corner only) 15

16. CLASS® FEA Validation
Component FEA
Axle Clamp Group
Hanger 16

17. CLASS® Spring/Damping Validation
Component cycle testing on seals, spring, damping, and power module 17

18. CLASS® Tuning Validation
System Tuning
Data acquisition hardware and software used to evaluate changes in vehicle behavior.
Effect of changes to spring and damping can be objectively evaluated.
Responsiveness and accuracy of leveling can be tuned. 18

19. CLASS® Suspension Validation
On Vehicle Durability
Structural durability test at proving grounds per standardized Altoona bus test requirements for 5 year/150K mileage.
Provided durability and reliability information on wearable components and environmental performance. 19

20. Markets
CLASS® for Ambulance / Rescue 20

21. Markets
CLASS® for Limo / Shuttle Bus 21

22. Markets
CLASS® for RV Motorhome 22

23. Markets
Underground Mining and Off-Highway 23

24. Markets
Specialty Vehicles 24

25. Hydraulic Schematic 25

26. Electrical Schematic 26

27. Service Intervals 27

28. Parts Breackdown 28

29. Troubleshooting Guide29

30. Manufacturing
Fabrication
Machining 30

31. Manufacturing
Powder Coating
Assembly 31

32. CLASS® Service & Support
Operator Manuals with Parts Lists, Troubleshooting, Maintenance Schedules.
Service Parts and Support through LiquidSpring LLC.
Field Service Technicians to conduct maintenance/service and installation training.
Website: 32