Bygen has developed a revolutionary 4-speed automatic transmission for electric vehicles (EVs) that enhances performance by extending driving range, reducing costs, and improving overall efficiency compared to traditional systems. This compact and lightweight design minimizes torque loss and allows for smooth gear shifting without extra power, making it applicable across a wide range of EVs including e-bikes and motorcycles. The technology is backed by multiple patents and aims to compete effectively in the growing EV market.

1. JULY, 2018
Using totally different technology paradigms from traditional transmission of ICEs,
BYGEN has made success to invent extraordinary transmission for EV,
Which should accelerate quick market enlargement of all EVs:
DRIVING RAGEN EXTENSION, PRODUCT COST Reduction,
MAX. SPEED & Grade Ability Increase
Driving Range Extended More Than 50%
Technical Information:
High Efficiency Electric Vehicle
Powertrain with 4-speed automatic transmission

2. Contents
Introduction of Transmission01
Transmission Design02
Core Technology03
Why Efficient in Transmission Motor?04
Performance of Prototype EV2W05
Marketing Channels06

3. Intellectual Properties
◎ 9 Local Patents
◎ 2 PCTs (Chinese Taipei, separately)
Introduction of Bygen’s Transmission1
◎ 4-Speed Auto Transmission ⇒ commercialized for the first time in the world
- 1 -
2nd Gear 1.4:1 3rd Gear 2:11st Gear 1:1 4th Gear 3:1Gear Ratio 300%
◎ Successful In-House Road Test (Authorized Certification Scheduled in the end of August, 2018) ⇒ Applicable to all EVs
• Approved efficiency and performance with prototype EV2W with in-wheel motor ⇒ Driving range increased ⇒ Dramatic Cost-Cut
◎ Unique Design Concept Make It Possible
• No complicated hydraulic power system, nor separate clutch system ⇒ Auto Gear-Shift Possible without extra power
• Very simple mechanical design makes it possible to be much lighter, and smaller than ICEs are
◎ Less than 50% gearing difference at each gear-shift ⇒ Minimizing torque interruption and securing stable RPM range
◎ 4-Speed Auto Transmission with 300% gearing ratio ⇒ Keeping both high acceleration torque and extreme top speed requirements
• Grade ability over 30% can EV to move smoothly at hill climbing.
◎ Automatic transmission inevitable ⇒ Maximum torque at zero RPM requires automatic gear shifting to keep durability and safety.
◎ All electric vehicles including personal mobility, e-bicycle, e-motorcycle, passenger car, truck, bus, heavy vehicles,
◎ Wind Power Generation
• Could be replaced for existing wind power gearbox
• Efficiency Maximized by auto gear shifting along with wind power, that is, low gear for strong wind and high gear for weal wind
• Wind blade durability increased because of low usage of brake system
Overall
Development Completed
Ideal Transmission for EVs
Technology Applications
Light Weight, Small Dimension, Non-hydraulic

4. ◎ Due to the compact-size and ultra light transmission, in-wheel type powertrain drives two wheels independently.
• With same motor, Bygen’s can deliver three times performance at higher level of efficiency ⇒ Dramatic cost benefits
• Why two-wheel-driven?
- Higher performance (top speed, grade ability, Safety & smooth cruising , Preventing unintentional sliding, Emergence cruising with one
In-wheel Type General Type
Customized
Production with
any type & design
Transmission Design2
Transmission
&
Motor
Battery
Prototype Motorcycle-Z Type of Transmission-Motor
INPUT
OUTPUT
OUTPUT
INPUT
- 2 -
In-Wheel Type

5. ◎ Inner small clutch between input shaft and gear
• Hidden clutch to absorb torque interruption & shift shock provides smooth and fast gear shift. ( Core Source Technology II )
◎ In-put axis to deliver motor rotation includes synchronizer with several pawls at each gearing stage.
• Rotating synchronizer with high speed is controlled by Cam-Principle
• Automatic gear shift without any external power (non-hydraulic, no-extra-motor) ( Core Source Technology I )
Core Technology3
◎ Without any extra axis, motor and transmission is packed in one case ⇒ Detachable ⇒ Customized in any type
• It could be possible due to compact-sized and light transmission. Total weight of transmission of prototype is less than 8 kg.
• Motor, transmission, decelerator, and clutch are connected with one rotating axis in a series.
- 3 -
Hidden Clutch Inside
OneBoxingwithMotor&Transmission
ShiftShockAbsorbingMechanism
Without any revolution gear, same rotating
speed of synchronizer with each gear enables
shift shock minimized.
1st Absorbing
Elasticity of unique clutch absorbs residual
shift shock.
2nd Absorbing
Providing Smoothing Gear Shift
Automatic Gear-Shift w/o Extra Power

6. Better-Performance Factors of BYGEN Transmission Motor
◎ Lower torque motor can be used due to gear shift, which results in cost benefits
• General type could produce two times performance, and in-wheel type could do three times performance than without-transmission
◎ Despite a much wider operating RPM range than ICEs, the efficiency of electric motors still varies at different speeds.
• Automatic multi-speed transmission adds the EV powertrain to optimize efficiency at all speeds.
• Current should be minimized at rated RPM ⇒ Lower battery capacity could be adopted  cost benefits
• Preventing overheat of motor at rated RPM ⇒ Lessening energy loss from overheat ⇒ No need of extra water cooling devices
◎ Overall weight with lower battery size, lower torque motor, and lighter powertrain should be lighter ⇒ Increasing performance
• Bygen’s prototype motorcycle shows total weight reduction over 30% compare to same performing products.
4
- 4 -
Minimized Size
Driving with Rated RPM
Weight Reduction
In-Wheel type
Battery

7. 2-wheel-driven electric motorcycle with 4-speed automatic transmission
Max. Output Transmission Gear Ratio Battery Weight Length Width Height Tire
1kW
(0.5kW × 2)
4-speed auto
Gear ratio 300%
1st Gear 1:1 2nd Gear 1.4:1
3rd Gear 2:1 4th Gear 3:1
Li-Ion 1.95kWh
(36V × 54.4Ah)
60kg 1700 700 950 Φ530
Max. Speed
Grade Speed (km/h) Driving Range
20% 30% 40% CITY Motorway (50km/h) Motorway (70km/h)
70km/h 46km/h 32km/h 23km/h 102km 117km 86km
CITY Motorway (50km/h) Motorway (70km/h) Remark
52.3 60 44 Efficiency = Range / Battery capacity (1.95kWh)
▶ Comparing to any vehicle with same performance (max. speed 70 km/h, grade ability 30%)
- 11 -
Improving efficiency
Over 50%
Dramatic production
cost
Price competitiveness
To ICE 125cc
Performance of Prototype Motorcycle
▣ Certification Test Data of Prototype
5
1. Prototype Model Z
2. Specification
3. Performance
4. Battery Efficiency (km/kWh)

8. ▶ New Technology, New Partners
Marketing Channels6
- 7 -
Sharing Technology & Partnership
Powertrain Supply
◎ With sizable local and regional market size, one market-one partnership to share technology and future
◎ Supply powertrain and transmission module
To-Be Products
▶ To be introduced to market with Bygen’s own technologies
Type Remarks
E-motorcycle
2-wheel-drive
EV2W
• Adopting transmissions on both wheels  increasing vehicle performance and riding stability, preventing
slip on rainy, snowy, and sandy road condition, and making it possible one-wheel-riding at emergency
• Rider-friendly design enables to adjust seat height to leg length  rider’s safety
Tilting EV3W
• Unique tilting technology
• Three wheels are tilted like differential gear at cornering for safety. Vertically fixed at line driving and stop.
• Adjustable seat height
Covered-tiltingEV3W
• Covered for rainy days and winter seasons
• Width of 1m or lower, Length of 2m or less, Height of 1.8m or less, capacity of 2 passengers
E-bicycle
(Chainless)
2-wheel-drive
• Front wheel is run by transmission hub and pedals, while rear wheel is run by motor with transmission.
• PAS (Pedal Assist System) adopted
• Pedals located on front wheel provides comfortable riding with wide saddle, and safety riding for low
location of saddle (both feet can touch the ground at stop).
Tilting EV3W
• One transmission hub at front wheel, two transmission motor at rear wheels
• PAS adopted
• For the elders and beginners

9. YouTube : ☞ https://www.youtube.com/watch?v=fR2Is4Bd3vE
E-mail : tech@bygen.co.kr, inkeeoh@gmail.com
Telephone : 82-31-529-1478, 82-10-8782-0105
Fax : 82-1-528-1479
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