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

Bygen Transmission‘s info & technology
Produt Story
In-Wheel Transmission(5-speed Auto)
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
Various Output Designs
In-Wheel 5-speed
Auto Transmission
Inrunner Type
4-wheel
In-Wheel 5-speed
Auto Transmission
Outrunner Type
2-wheel
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
In-Wheel 5-speed Auto Transmission (under development) : gear ratio of 352%
Difference in gear ratio by level of speed is less than 40%
Maintaining rated RPM range at any speed & Preventing torque interruption
1st gear 2nd gear 3rd gear 4th gear 5th gear
1.25:1 1.70:1 2.375:1 3.316:1 4.40:1