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John DesJardins and Josh Anttonen
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Concept
Design and manufacture a working
transmission
Must be able to reach speeds up to
40mph
Manufacture in a $500 budget
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Timeline
Modify design for new clutch (3 weeks)
Finalize parts list and order parts (1-2
weeks)
Build sub-assembly and test fit
components ( 4-6 weeks)
Product testing (1-2 weeks)
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Design
Upgrade existing
primary clutch on
the motor
Parameters of clutch
are from 0-3100 rpm
Need space for new
components
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Design
Comet Torque
Converter
Continuously
variable gearing
from motor to
jackshaft
Sprocket and chain
from jackshaft to
driveshaft
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Torque Converter
Uses movable pulleys to change output
RPM
Unlimited gear ratios within clutch
parameters
Acts as both a clutch and a transmission
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Torque Converter
Pulleys move as
RPM on engine
increases/decreases
Low gear primary
pulley is small,
secondary is large
High gear primary is
large, secondary is
small
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Budget
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Reductions
Engine RPM is approximately 3100
Reduction from torque converter is 2.4:1
for low gear
High gear ratio is 1:1
Reduction from chain and sprocket is
3:1
Reductions meet our needs for overall
speed as well as torque
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7/8” to 1” coupling
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Special Thanks
Cale Polkinghorne
Mike Rudisil
Robert Marlor
Carl Peterson and Yvonne LeMire
Classmates
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Questions?