Candidate Projects E-CVT (sign IP Agreement) –Use the same idea for fix variable transmission (100 : 1) Omni Wheels Telescoping Pole.

Candidate Projects

• E-CVT (sign IP Agreement)– Use the same idea for fix variable

transmission (100 : 1)

• Omni Wheels

• Telescoping Pole

Continuous Variable Transmission (CVT)

Jerry Tang - Elite

E-CVT Principle

• A is rotating while it is revolving alone circle B

• A rotation speed is R/r -1 or (R-r)/r

• How can we make A revolve along circle B? This is E-CVT

A

B

C

XX

R

r

Example No Slippage

A

B

C

D

A

B

C

D

B’

C’

D’

A’

B’

C’D’

A’

B’

C’

D’

A’B’

C’D’

A’

B’

C’

D’

A’

B’ C’

D’A’

B’

C’

D’

A’ B’

C’D’

A’

R = 2” Theta = Pi/4r = 1”Gear Ratio = R/r -1 = 2/1 -1 = 1:1

B’

C’

D’

A’

Gear Ratio

R r R/r-1 1/GR4 1 3 0.3333333 1 2 0.52 1 1 1

1.5 1 0.5 21.25 1 0.25 41.1 1 0.1 10

1.01 1 0.01 1001.001 1 0.001 1000

1.0001 1 1E-04 10000

E-CVT Prototypes

1) Vertical Piston 2) Horizontal Piston

5) Driven Gear4) Floating Gear 6) Sliding Cam

3) Fixed Cam

E-CVT Current Prototypes

1) Vertical Piston 2) Horizontal Piston

4) Driven Gear3) Floating Gear

E-CVT Output Shaft

1) U-Joint 2) Slotted X-Y Joint

6) Outer Gear Output4) Flexible Shaft

3) Pinned X-Y Joint

5) Inner Gear Output

X-Y Joint

The 2nd Generation of the E-CVT Prototype ProjectBased on the resource, time, availability, and course guidelines, work with students to define and achieve the project objectives according to the following:1. Understand CVT and E-CVT.2. Determine/Analyze the constraints of the E-CVT. For instance:

a. Is input and output reversible?b. O/I ratio range.c. Output torque range.d. How can the O/I ratio be a function of the input torque (auto shifting)?

3. Determine the efficiency of the E-CVT.4. Determine the E-CVT component dependencies in term of O/I ratio, O/I torque, etc.5. Model, simulate, design, and produce the prototype if applicable.This list can be grown and shrunk as necessary.

Backup

Vertical Pistons

Drawing of Floating Gear

Drawing of Driven Gears

Horizontal Piston

Example No SlippageR = 2” Theta = Pi/4r = 1”Gear Ratio = R/r -1 = 2/1 -1 = 1:1

A

B

C

D

A

B

C

D

B’

C’

D’

A’

B’

C’D’

A’

B’

C’

D’

A’B’

C’D’

A’

B’

C’

D’

A’

B’ C’

D’A’

B’

C’

D’

A’ B’

C’D’

A’

Gear Ratio

R r R/r-1 1/GR4 1 3 0.3333333 1 2 0.52 1 1 1

1.5 1 0.5 21.25 1 0.25 41.1 1 0.1 10

1.01 1 0.01 1001.001 1 0.001 1000

1.0001 1 1E-04 10000