Under the same battery capacity, conventional all-electric vehicles with the same model which
can drive 400 kilometers could drive 450 kilometers through braking energy recovery, control
system transmission and upgrading etc. This is already a relatively high technology index.

If our invention technology is applied to conventional all-electric vehicles, the all-electric vehicles
can efficiently save energy in running process under the batteries’ capacity unchanged. The
all-electric vehicles with the same model which drive 400 kilometers will drive 600~800

The present invention ‘Electric Energy Recovery Transmission with Dual-power Source’ is very
different from conventional planetary transmission in operation principles and structure. For
example, traditional transmission has a power input shaft and a power output shaft.

Because the present invention has two power input shafts, it needs two motors to act on the
transmission at the same time. Then the transmission designed by the present invention has
two below operating phenomenon.
(1) The output shaft is zero speed, when both motors are at a set rotation speed (for
example, 1000r/min).
(2) The rotating speed of one of two motors is at a set constant speed(1000r/min). The other
one is an inverter motor which could adjust speed by variable frequency within a set
rotational speed range (for example, 100r/min~5000r/min). The output shaft of the
transmission could speed up or slow down (decelerate) continuously, can also transit to
zero speed smoothly, which realizes smooth conversion of clockwise and
counterclockwise rotating of the output shaft.

When the present invention achieves the above two operating rules, the internal transmission
parts for the transmission have the following performances.

When the power of both motors continuously acts on inside the gearbox and the output shaft
rotates in positive direction or reverse direction and the speed is zero, all gears and power
shafts in the gearbox are still running at high speed. Moreover, the rotational direction always
keeps unchanging.

All gears in the gearbox are always engaged and all moving parts never disengage. There is no
clutch, separation mechanism, sliding mechanism and braking device inside the gearbox.

Until now, our invention is the only transmission in the world that achieves zero output shaft
speed, while having continuous input power.

Because the present invention ‘Electric Energy Recovery Transmission with Dual-power Source’
has the above two transmission features, so there are three below obvious functions.

[a] When both motors are at the set speed, the output shaft is zero speed although motors and
the gears in the gearbox rotate at high speed. [b] Theoretically speaking, there is no torque
generated on the output shaft. But in the practical testing, there is still a relatively small torque.
[c] In practical application, the transmission and motors will not stop working even if the end of
output shaft for the transmission gearbox by the present invention counters strong resistance.
When all-electric vehicles stand from rest to start, there is no load to start the motors.

Our testing data about a 20KW transmission engineering prototype shows that the maximum
output torque is about 1000N.M at low rotating speed area of clockwise and counterclockwise
for the output shaft. For 30KW permanent magnet synchronous motor which is utilized for
conventional all-electric vehicles, the maximum torque is only 180N.M at the low speed.
Therefore, the transmission gearbox designed by the present invention has strong torque, which
can cause new all-electric vehicles to have unlimited developmental space.

The working status for both motors is as below, while the transmission designed by our
invention technology is outputting work. If a motor inputs power, the other motor will generate
electricity as a generator. Through testing a 20KW transmission engineering prototype by a
testing organization, the testing data shows that the generating power of the other motor is
about 2.89KW at high speed and the maximum generating power is about 15.63KW at low
speed when a motor inputs power with a rated power of 20KW. The generated electricity could
be input into the power system for reusing through the electric energy recovery device. As for
the power system, the electric quantity supplied by batteries to the transmission becomes
supplementary electricity under working conditions, its output electric quantity will be greatly
reduced. As a result, the present invention can greatly save the electric quantity output from
batteries, thereby greatly extending driving mileage for all-electric vehicles.

The present invention has been applied for international patents in USA, Japan, Europe, South
Korea, China and some countries. The international application date is August 24th in 2018, We
already got Chinese patent, other patents are pending.

Since the invention has been applied, we have made four engineering prototypes. We tested the
latest 30KW transmission engineering prototype at Shanghai Electrical Apparatus Research
Institute on October 12th through 13th in 2021. The testing data shows that the prototype has
greater torque and the function to save electricity greatly comparing with motors which are used
for conventional all-electric vehicles. This is an Epoch-making technology revolution in the field
of electric vehicles.

Because the patents in some countries are pending, so the technology contents and index are
confidential at present. If anyone or manufactures want to know more, we could provide some
parts of technology information and test images, videos for the invention after signing up NDA. If
you are interested in it; we could share testing data and analysis report after signing up
invention protection agreement.

Thank you for your consideration. We look forward to your response.

Please contact us when you feel free.
Name: Jiying(Jean) Zhao
Phone#: +1 262-237-3469
Email: jean@kenoshaengineering.com
Don Tjader: +1 262-496-7784
Email: don@kenoshaengineering.com