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Hydraulic Hybrid Team. Team: Kevin Alexander- Market and Test skid Phillip Bacon- Accumulators Tyler Degen- Accumulators Brandon Diegel- Pump/Motor Nick Hemenway- Markets and Business Luke Jackson- Valves and Control Systems Christian L’Orange- Computer Modeling and Analysis - PowerPoint PPT Presentation
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Hydraulic Hybrid Team
Team:Kevin Alexander- Market and Test skidPhillip Bacon- AccumulatorsTyler Degen- AccumulatorsBrandon Diegel- Pump/MotorNick Hemenway- Markets and BusinessLuke Jackson- Valves and Control SystemsChristian L’Orange- Computer Modeling and AnalysisGrant Mattive- Pump/MotorDean Simpson- Computer Modeling and Analysis
Advisors:Dr. Allan Kirkpatrick, CSUDr. Guy Babbitt, Czero Solutions, Inc.Chris Turner, Czero Solutions, Inc.
Presentation Outline
• Hydraulic Hybrid Overview
• Project Problem Statement
• Objectives and Constraints
• Market Opportunities
• Components and Research
Courtesy of Linde Pumps
Courtesy of viaggiaresempre.it
Hydraulic Hybrid Overview
• Utilizes regenerative braking
• Reduces fuel consumption and emissions
• High energy and power density
• Optimal for frequent stop and go driving of large vehicles
• Configurations Investigated: Series and Parallel
• Current development based in US and Europe
Energy Comparisons
Courtesy of Parker.com
Courtesy of HHV system panel
Series Hybrid
Pump
Low Pressure
High Pressure5000 psi Pump/Motor
Parallel Hybrid
Pump/MotorLow Pressure
High Pressure5000 psi Driveshaft
Problem Statement
• Increase vehicle fuel economy through regenerative braking
• Be adaptable to multiple vehicles with only component resizing
• Reduce vehicle emissions
• Reduce vehicle maintenance costs Courtesy of ourworldtravels.com
Design a hydraulic hybrid vehicle that will:
Objectives and Constraints
Courtesy of ITDP
Objectives and Constraints
Constraints• New components cannot add more than 10% of original vehicle mass to the vehicle
• Payback period: less than 2 years through fuel savings and reduced maintenance cost
• Major components sourced from commercial manufacturers
• Must have an expected life span of at least 10 years
Market Decisions• Population Density
• Refinement expectations of the vehicle
• Heavy reliance on bus system
• Find size ranges most widely used in many countries
• Most common chassis layout
• Short bus routes or stop and go drive cycles
Target Vehicle and Countries
• Focus on India, China, and Singapore
• Design will be based around 7000kg GVW
Typical of Class 4 vehicle
• Initial design will focus on front engine layout
• Simplistic control system to minimize cost
Major Components
• Functions as both a pump and a motor (P/M)
• Regenerative mode: P/M pumps fluid
• Acceleration: P/M is driven by fluid
• Many types of pumps and motors, but only a few that fit our application
• Needs to be low speed, high torque, and variable displacement
Pump/Motor Gear Screw Axial
PistonRadial Piston
Vane
Variable Displacemen
t
- - + + +
High Pressure (5000 psi)
- - + + -
Displacement size
- - + - +
Pump and motor
operation
- - + - -
Applicable to HHV
No No Yes No No
Major Components• Axial Piston Pump – Odd number of pistons situated parallel to each other rotating around a common shaft
• Variable Displacement – Displacement can be adjusted to increase or decrease the amount of fluid pumped per revolution
• Torque=Pressure*Displacement
Bent Axis Piston Pump
Swash Plate Pump
Major Components
Bent Axis Variable Displacement Pump Example
0 deg 22 deg 45 deg
www.epa.gov/otaq/technology
Major Components Accumulators
• An energy storage device
• Two main types: Gas charged and spring loaded
• During braking, hydraulic fluid compresses an inert gas or spring to store energy
• Stored energy is then released back to the system when needed
• Main types of gas accumulators are bladder, diaphragm, and piston
Bladder Type Accumulatorwww.Liquid-dynamics.com/animations
Major ComponentsAccumulators
Piston Type www.Liquid-dynamics.com/animations
Diaphragm Typewww.Liquid-dynamics.com/animations
Diaphragm Type
Piston Type
Bladder Type
Pressure to ~5000 psi
+ 0 +
Storage Capacity Range
- 0 +
Weight + 0 +
Safety + 0 +
Applicable to HHV No Yes Yes
System ModelingModeling Simulates System Performance
• Pump efficiencies• Operating pressures• Flow rates• Control system analysis• Valve control
Advantages• Changes in component size/operating conditions can quickly be analyzed• Vehicle drive cycle simulation• System control integration
Mototron
System ModelingModeling Software
• Matlab/Simulink R2007a• Matlab/Simhydraulic• Hysan
Summary• Recapture energy lost through braking
• Take advantage of wide and varied potential markets
• Seeking to fill retrofit applications
• Creating a dynamic computer simulation of system
• Designing a test bed model for system performance analysis
• Install and test system in vehicle
Special Thanks To:Dr. Kirkpatrick (Advisor-Colorado State University)
Dr Guy Babbitt (Advisor-Czero Solutions)Chris Turner (Advisor-Czero Solutions)
Staff and Employees of The Engines and Energy Conversion LaboratoryHysan Modeling