Dynamometer Redesign and
Build for Future RIT Automotive
Laboratory
Project 05105
Sponsored by: Mechanical Engineering Dept,
Dave Hathaway and Mark Steinke
What is a dynamometer?
A dynamometer is an instrument used to
measure the performance of an engine
Presentation Structure
Work Breakdown Structure (WBS)
Mission Statement
Overview of Design Process
Overview of Last Year’s Design
Mechanical Aspect
Electrical Aspect
Budget
Schedule
Conclusions
Team Members - WBS
Team Leader
Scheduling
Overall Project
Budget
Erin Canfield - ME
Jason Keuer - ME
Simulation
Graham Pennington - ME
Mechanical Aspects
Housing Design
Chief Engineer
Torque Measuring
John McDonald - ME
Sensors/Signals
Muferihat Abduljelil - EE
DAQ
Cedric McClary - EE
Electrical Aspects
Mission Statement
The mission of this design project team is
to design a dynamometer that can be
replicated in-house to produce between 4
and 6 units for use in the future RIT
Automotive Laboratory
Design Process
Recognize and Quantify the Need
Design Objectives and Criteria
Concept Development
Feasibility Assessment
Analysis of Problem & Synthesis of Design
Overview of Project 04006
Successes:


Impeller and housing
design
Sensor selection
Failures:


Seals allowed leakage
No functioning DAQ
system
Improvements:



DAQ system
Housing design
Torque measuring
Torque Measurement Devices
Torque Arm
Reactor Torque
Sensor
Torque Arm
Utilized in previous
design
Torque
Arm
Picture courtesy of LandandSea.com
Used on current Land
& Sea model (shown)
Reactor Torque Sensor
(RTS)
Incorporated in the
redesign
Utilizes 4 bonded
strain gauges
Compact design
Easy installation
Picture courtesy of transducertechniques.com
Dyno Housing Comparison
New RTS required redesign of outer housing
Previous
Redesign
Torque Arm
CUP
RTS
Design Setup
Exploded View
Assembled View
Simulation
Simulation Results
Simulated with 60 psi pressure
Max. stress from simulation = 4285 psi.
Yield strength of 6061 Al. = 39,900 psi.
Maximum deflection of .00111 inches
Housing meets criteria for our design
Data Acquisition System (DAQ)
Components of DAQ
Transducers and Sensors
Signals
Signal Conditioning
Driver and Application Software
Transducers/Sensors
Devices that are used to convert physical
phenomenon into electrical signal.
Signals
Signal Conditioning
Signal Conditioning is a method that
maximizes the accuracy of a given data
output by converting it to a readable
range.
There are two types of signal
conditioning:
Modular*
Integrated
Driver Software

Software that creates communication
between hardware devices that are used to
collect/read data with the software that is
used to analyze the data
Application Software
A software that adds analysis and
presentation capabilities to the data
collected

Example:
LabVIEW
Master Parts List
Projected Budget as of 2/15/05
Part
Quantity
Source
Mfg Part #
Reactor Torque Sensor
1
Interface
5330
Aluminum
1
Steel
Cost (ea.)
Total Cost
1560.00
1560.00
Metal Supermarkets
111.43
111.43
1
Metal Supermarkets
10.00
10.00
Hall Effect Sensor
1
Honeywell
276-1646
30.00
30.00
Signal Conditioning Network FP
1
National Instruments
FP1000
355.00
355.00
Thermocouple Module
1
National Instruments
TC-120
315.00
315.00
Other Modules
2
National Instruments
AI-110
315.00
630.00
Module Base
1
National Instruments
TB-1
171.00
171.00
Isolated Terminal Base
1
National Instruments
TB-3
157.00
157.00
Power Supply for the Modules
1
National Instruments
PS-1
45.00
45.00
Module Rail
1
National Instruments
DIN
7.20
7.20
Mass Airflow Meter Cable
1
TSI Incorporated
1303775
19.00
19.00
Total
3370.63