TECHNOLOGY
Powershift changes the equation
Powershift changes the equation
How an additional ratio, combined with powershift, can create greater freedom to optimise an electric powertrain for its vehicle and duty cycle.
How an additional ratio, combined with powershift, can create greater freedom to optimise an electric powertrain for its vehicle and duty cycle.
Exploring performance, efficiency, packaging and shift-character opportunities enabled by multi-ratio EV transmission technology with powershift capability.
Exploring performance, efficiency, packaging and shift-character opportunities enabled by multi-ratio EV transmission technology with powershift capability.
THE ENGINEERING OPPORTUNITY
More freedom to design around the duty cycle
More freedom to design around the duty cycle
Electric powertrain design is application-specific. Vehicle engineers balance performance, efficiency, operating range, thermal requirements, packaging and the way the vehicle is expected to be used. A single-speed architecture can be an effective solution across many of these requirements.
Electric powertrain design is application-specific. Vehicle engineers balance performance, efficiency, operating range, thermal requirements, packaging and the way the vehicle is expected to be used. A single-speed architecture can be an effective solution across many of these requirements.
For some applications, introducing an additional ratio creates another design variable. It can offer opportunities to tailor motor operation and vehicle response across different conditions.
For some applications, introducing an additional ratio creates another design variable. It can offer opportunities to tailor motor operation and vehicle response across different conditions.
THE ENABLING TECHNOLOGY
Powershift
Powershift
We have developed a compact transmission and control architecture designed to change ratio without an interruption in drive. Its powershift capability is intended to maintain drive as torque is handed between paths during a ratio change.
We have developed a compact transmission and control architecture designed to change ratio without an interruption in drive. Its powershift capability is intended to maintain drive as torque is handed between paths during a ratio change.
The principle is straightforward: where another ratio creates value for a vehicle, we aim to make that ratio practical without the loss of drive associated with an interrupted-torque shift.
The principle is straightforward: where another ratio creates value for a vehicle, we aim to make that ratio practical without the loss of drive associated with an interrupted-torque shift.
Test data
Test data
Comparison of a torque-interrupted shift with powershift.
Comparison of a torque-interrupted shift with powershift.
The chart plots torque and speed against time through a ratio change, with a torque-interrupted shift on the left and a powershift on the right.
The chart plots torque and speed against time through a ratio change, with a torque-interrupted shift on the left and a powershift on the right.
One architecture. Four opportunities.
One architecture. Four opportunities.
Powershift
Powershift
Maintain drive
Maintain drive
Designed to change ratio without interruption in drive, helping preserve propulsion through the shift.
Multi-ratio optimisation
Multi-ratio optimisation
Create design freedom
Create design freedom
An additional ratio creates another variable for matching motor operation to duty-cycle and vehicle requirements, potentially supporting performance, efficiency and wider system-level design choices.
Compactness
Compactness
Open application potential
Open application potential
A compact architecture can make powershift easier to package in space-constrained applications; suitability depends on the vehicle architecture.
Shift character
Shift character
Engineer the experience
Engineer the experience
Control and calibration create opportunities to tailor shift behaviour and feel to the intended application.
Engineering in detail
Engineering in detail
Matching motor speed to the moment
Built on proven transmission principles
Keep exploring
Keep exploring
Powershift creates more design options
Powershift creates more design options
E-Motiv provides an enabling transmission and control technology for vehicle applications where multiple ratios create value. Its compact powershift architecture is designed to maintain drive through a ratio change while giving engineers additional freedom to optimise the powertrain and tune shift character.
E-Motiv provides an enabling transmission and control technology for vehicle applications where multiple ratios create value. Its compact powershift architecture is designed to maintain drive through a ratio change while giving engineers additional freedom to optimise the powertrain and tune shift character.
Explore whether powershift technology could provide an advantage for your vehicle and duty cycle.
Explore whether powershift technology could provide an advantage for your vehicle and duty cycle.