[Solved] Dynamometer ... FAIL !

Hello,

I have taking contact with my local tuning guy (petrol engine override ECU program) because it has a dynamometer.
I don't find graphic about the power and torque in this Soul EV.

But, my little guy have 2 problems with the Soul EV :

- parking brake don't work when it push the accelerator = the car moving from left to right on the reels.
- no steal part to block the car (with 2000kg strap) during the test (it can not use the towing eye).
- it can make some sort of clamp to attach the cradle but ... it's take time (and money).


So ... can someone have torque and power graphics from Kia designed for this Soul EV ?
Only for the fun.

The AVT does Dynamometer Testing.

The results for the Kia Soul EV are here Vehicle Specifications and Testing Results

Details of the test are here - Downloadable Dynamometer Database

OK, it's great.

In the same time, i have calling an other dynamometer owner (that it test massively the luxe sport car) and he is OK to test the Soul EV (it have the strap to block the Soul EV on synchronous reels and the OBD link on the dynamometer to retrieve the speed of motor during the test).

:idea: stay tuned ...

OK, test on dynamometer (4wd, synchronous reels) is planned for the next week. :mrgreen:

Ok, solved ... but not completly.
The dynamometer can not handle the torque of the electric chain traction system.



The dynamometer is restrict by the builder to provide brake on reels that it reproduce the resistance of road.

Problem : when it have a 500Ch engine, he must use a high gear ratio to start the brake simulation at an high RPM on the wheel.

Problem : on Electric car, the torque is maximal at 0 RPM. The dynamometer guy can handle the brake strategy manually ... but it's less accurate.

We loose the START measure of the Torque at 0 km/h.

The dynamometer guy can not retrieve the RPM with is OBD2 tool (to newer bus).

So, it uses the Torque Pro with the RPM indicator to "lock" his measure on the dynamometer :

- Start the car (dyn. is OFF = free wheel)
- Arrival on the traget RPM
- Push the thottle at FULL and START the dynamometer brake strategy.
- Try 3 times with differents settings of the dynamometer brake strategy.



Hint : this is the standard method to use a dynamometer with electric brake park ... that it's disengaged when you push the throttle.



The front low frame is attach with the same anchorage.
Professionnal ... no problem with the test.

And the result ...
http://www.automobile-propre.com/forums/kia-soul-ev/alors-ca-tire-combien-le-soul-ev-en-puissance-t6133.html



Reminder : Dynamometer can not handle the torque at 0 tr/min from a Electric Car ... the mecanical fuse on the dynamometer disengage the reels from the brake.

So, the Dynamometer guy have tested the car 3 times to adjust the brake strategy (to not trigger the mecanical fuse of the Dynamomer).

Reminder : The rear wheels are locked during the test, car power strategy may be not the same ... (you know the car maker ).

Look this synchronous dynamometer from the Kia factory : https://youtu.be/6AtU-sNdPrI?t=2m45s

For those of us using imperial units, that is a peak of 103.5 horsepower and 183 lb-ft of torque -- measured at the wheels. For comparison, the 2.0L gasoline-powered Soul has a peak of 123 horsepower and 113 lb-ft of torque at the wheels. In the petrol car, power builds from about 50 hp at 2,800 rpm to that 123 hp peak way up at 6,500 rpm. You can see from the chart above that power deliver is much different in the Soul EV: the power quickly ramps up to about 100 hp and then continues at that level as the car accelerates to max velocity.

Yep ... i have retrieved a measure from a thermal car to compare.

-
In Korea the government has mandated the operational efficiency of electric cars in winter should be maintained at 70 % of the normal driving distance. New cars will not get the government subsidy if they fail this test. The Soul EV and the I oniq Electric already meet this requirement because of the heat pump. see http://www.etnews.com/20170830000226

Interesting to see the testing for this.



and a YouTube video

https://www.youtube.com/watch?v=KErZh29x7D4

----------------------

The tested ranges at -7C as compared to 23C were -

Kia Soul EV 84 %,
I onic Electric 81%
GM B olt 69.5%
N issan L eaf 65%
SM3 62%
BMW i 3 58.6%

see - http://blog.naver.com/dr_ecsta/220796187688