Cars with a working KERS style system (like the Nissan 2020 VGT)?

  • Thread starter Thread starter ChromeTheMoon
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Boost button raises boost pressure only. Turbo is a MGU-H.

Testing at SSR-X, arcade mode, time trial reveals that the power unit on the Nissan 2020 is much like FIA WEC and Formula 1 Power Units with a ICU, MGU-K, MGU-H and ES.

1. The boost button raises boost pressure only.
2. The boost button does not pull stored power from the ES.
3. The ES can be charged by the MGU-H.

Whether recovered energy from the MGU-H is diverted to the MGU-K, under boost or not, is unknown.

The accelerator data trace in the telemetry file may show the boost button press, but I'm not sure.

You can test these claims yourself with this method. It may be hard to test with a controller, probably impossible if acceleration is mapped to a button.

Start a arcade time trial at SSR-X, all aids off, manual transmission.

Accelerate hard to about 100 MPH, shifting quickly to 7th gear. Start playing with part throttle acceleration. By modulating the throttle and observing speed and the charge arrow I observed the following states:
- Accelerating and discharging.
- Decelerating and charging.
- Cruise and charging.
- Accelerating and charging. (Accelerating slowly, but still)
- Decelerating and not charging. (ES fully charged)
- Cruise and not charging. (ES fully charged)

With the car at part throttle on level ground reach a steady cruise speed start testing the boost button.
Reach a steady cruising speed under part throttle as soon as possible on the back straight. The car will steady cruise at a range of speeds, I reached steady at 161 and 185 MPH, many others are possible, obviously. By observing the boost gauge, speed and charge arrow I saw that:
- Under steady throttle input the pressing the boost button caused the car to accelerate. I went from from 161 to 198(I think) in one trial.
- The boost button caused the boost gauge to jump up.
- Releasing the boost button caused the boost gauge to drop, and the car to decelerate. Sometimes the blowoff valve released, sometimes not.

The charge indicator was not affected by the boost button.
- Pressing the boost button did not cause the red discharging indicator to light.
- If the ES was charging, pressing the boost button did not turn off the charging indicator.

I did take a video of all this, but it's boring. Saving the best lap time and looking at the graph shows this as well. I'm not absolutely sure, but there are marks on the accelerator data trace in the telemetry that may be the boost button.
 
Thanks @MadMax & @ChromeTheMoon - I'll begin my testing here shortly and will try both methods. Will most likely edit this post with my findings.

I am curious though, if its only affecting boost-pressure, should it still be referred to as a "KERS" system ?, or something more along the lines of an 'over-boost' controller ?, reminiscent of what some Japanese tuners were doing in the earlier 2000's. (The MCR R34 GTR is one I know that once had this feature, could dig up a video-link if need be)

Edit*

As described, ChromeTheMoon's SSRX test reveals the system-presence performance the greatest, boost-gauge fluctuation at speed is noticeable, along with improved acceleration (from button-pressing alone) & noticeable audio-feedback as well (can hear turbo change tone w/ increased pressure).
Madmax's test reveals some difference between the two, but consistency is questionable for this when NOT using system. I had T1 times range from 4.9s to 4.7s with NO input from controller other than accel-button, however when using the system the T1 times were consistent, averaging mid 4.8s trials. That is about ~ .100/sec difference in acceleration, something no one would notice from 'behind the (virtual) wheel' - hence my results yesterday saying I could not tell a difference.

I now also want to take-back my 'overboost controller' notion, as although it "increases" pressure when used, it does not exceed the manufacturer's boost-range (i.e. the gauge never measured further than its set max-reading).

Now to just figure out what this 'system' itself should be called. :lol:
 
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sparkytooth
PD knows that hybrid systems work differently differently from machine to machine it seems, I haven't driven the TS030 myself post 1.10 however.
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The Department of Redundancy Department surely gave its stamp of approval here. :lol: Sorry, I felt I had to...
 
TexRex
The Department of Redundancy Department surely gave its stamp of approval here. :lol: Sorry, I felt I had to...
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:eek: Dat Redundancy though.
 
The Nissan is like the Mclaren P1 in that the electrical system spools the turbo from zero revs eliminating all turbo lag and increasing power.
 
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