Products

World-first Non-hydraulic multi-speed auto transmission for ev

Bygen Transmission‘s info & technology

Produt Story

Compact 6-speed Auto Transmission

* Can-be-installed in wheel or any place of axles

Non-hydraulics Auto Transmission

World-first Non-hydraulic multi-speed auto transmission for ev
90% smaller and lighter than conventional automatic hydraulic
transmissions (original technology)

The base of In-Wheel

Integrated Motor and Transmission

Implemented the parallel one-axle design which contains the motor, transmission, reduction gear, and shock absorber in a single row.

Integrated and less complex

In-Wheel Type

Highly efficient In-Wheel type Minimizing loss of energy delivery to wheels

In-Wheel 5-speed
Auto Transmission
Inrunner Type
4-wheel

In-Wheel 5-speed
Auto Transmission
Outrunner Type
2-wheel

Axles type

Can-be-installed any place of axles

• Connected to Trailing Arm

Simplified chassis, Less total weight

Innovative Gear Shifting

Gear shifting is performed along with the rapidly rotating synchronizer which is built in the input shaft. There is no separate planet gear.

Built-in Shock Absorber

In-Wheel 4-speed Auto Transmission : gear ratio of 300% (Transmission Performance Test on EV2W)

1st gear	2nd gear	3rd gear	4th gear
1:1	1.4:1	2:1	3:1

5-speed Auto Transmission : gear ratio of 400%

Gear		1st gear	2nd gear	3rd gear	4th gear	5th gear
Ratio	In-Wheel	1.00:1	1.46:1	2.07:1	2.87:1	4.00:1
Ratio	Axle	0.50:1	0.70:1	1.00:1	1.43:1	2.00:1

※refer to Torque-RPM Graph with Gears

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BYGEN CO.LTD CEO:Kim Bog Sung

3F, 15 Chogwangsandandong-ro 6beon-gil, Hanam-si, Gyeonggi-do, South Korea E-mail:bygen@bygen.net Tel +82 1577-6020 Fax +82 2-427-1479