Competitiveness of C7SAT
Compact 7 Speed Automatic Transmission
Transmission effects
▶ Efficiency(km/kWh) increases by 50%
compared to the same output performances
Battery usage: “60kWh40kWh”
▶ Significant cost-cut
• 50% efficiency improvement1/2 smaller battery
(from 60kWh to 40kWh)
• No overheatNo need of cooling systems
• No high frequency noiseNo cost for preventing noise
compared to the same output performances
Battery usage: “60kWh40kWh”
▶ Significant cost-cut
• 50% efficiency improvement1/2 smaller battery
(from 60kWh to 40kWh)
• No overheatNo need of cooling systems
• No high frequency noiseNo cost for preventing noise
Auto Transmission in EV
▶ EV industry has made continuous efforts to reduce production cost by increasing driving efficiency such as increasing energy density,
decreasing weight of vehicle and increasing motor/inverter efficiency. Nowadays, auto transmission emerges as the most powerful solution
for increasing driving range for EV.
▶ Porsche adopted two speed auto transmission for new Taycan. Ford and KYMCO (Chinese Taipei, EV2W) introduced 6-speed manual
transmission for their vehicles.
• Compact sized auto transmission to satisfy preconditions for EV has not been developed so far in EV industry.
▶ Multi-speed transmission to provide higher efficiency will be the key for EV competitiveness. C7SAT will be game changer of EV.
※ EU decided stiffer penalties for ICE vehicles from 2021. New ICE production is not permitted soonest.
decreasing weight of vehicle and increasing motor/inverter efficiency. Nowadays, auto transmission emerges as the most powerful solution
for increasing driving range for EV.
▶ Porsche adopted two speed auto transmission for new Taycan. Ford and KYMCO (Chinese Taipei, EV2W) introduced 6-speed manual
transmission for their vehicles.
• Compact sized auto transmission to satisfy preconditions for EV has not been developed so far in EV industry.
▶ Multi-speed transmission to provide higher efficiency will be the key for EV competitiveness. C7SAT will be game changer of EV.
※ EU decided stiffer penalties for ICE vehicles from 2021. New ICE production is not permitted soonest.
In-house PCU Development
▶ PCU(Powertrain Control Unit)
MCU(Motor Control Unit) + TCU(Transmission Control Unit)
▶ Sophisticated and state-of-the-art TCU is developed by in-house technology to make “Zero Shift Time-lag”.
Independent and core powertrain (PCU+Motor+Transmission) system is constructed.
MCU(Motor Control Unit) + TCU(Transmission Control Unit)
▶ Sophisticated and state-of-the-art TCU is developed by in-house technology to make “Zero Shift Time-lag”.
Independent and core powertrain (PCU+Motor+Transmission) system is constructed.
Competitive Edge of C7SAT
Performance effect▶ Efficiency (km/kWh) improved by 50% comparing to same spec
▶ Production cost is radically cut.
Mass production▶ Total parts are reduced 1/10 than conventional transmission, which is easy to be assembled.
• Compact design and less parts to delete hydraulic (or other substitutes), clutches (torque converter), satellite gears, ring gear and
hydraulics-controlled parts. multi-plate clutched, brake, valve bod, etc.
Mounting▶ Mounted on chassis without current EV platform change
• Total size combined motor and transmission is smaller and lighter than conventional transmission including reducer.
▶ C7SAT is to be mounted on ICE.
• Efficiency will increase by over 10%. Production costs and weight will decrease by over 70%.
• Gear is automatically transferred to neutral when vehicle speed is under constant speed (about 5km/h) at brake “ON” mode.
At brake “OFF” mode, it is automatically transferred to first gear.
• It could be applied to heavy-duty EV2W as well as EV4W
Exclusive compact sized auto transmission for heavy-duty EV2W
COST▶ With Bygen’s innovation, it radically cut production costs as well as efficiency improvement.
▶ Unique and exclusive solution to apparently cut EV Cost.