Rally1 hybrid cars (2022-)

[Fast Eddie WRC]

Rally1 Car technical and aero regs and how some have been applied (needs translate)

https://motoresport.cat/2021/12/21/w.../?feed_id=5526

[greencroft]

Is there insight anywhere on how the additional power from the hybrid unit is to be deployed in stages? Does the driver have a button/switch to press to get the additional power or is it to be more subtle than that? Assuming the battery is used more in the stages than it is recharged, will there be an impact on stages where 2 stages follow close together with only a short road section between? Will some stages simply be too long for the electric power to be available for their entire length?

[WRCStan]

Is there insight anywhere on how the additional power from the hybrid unit is to be deployed in stages? Does the driver have a button/switch to press to get the additional power or is it to be more subtle than that? Assuming the battery is used more in the stages than it is recharged, will there be an impact on stages where 2 stages follow close together with only a short road section between? Will some stages simply be too long for the electric power to be available for their entire length?

This may help: https://dirtfish.com/rally/wrc/an-en...ide-to-rally1/

There's no button, it'll work off the start line in launch mode. From then it'll work if there's enough charge, the driver is accelerating and not braking etc. Read about the maps in the article, but it's yet to be explained more what these are. In road mode under full electric the range is about 20km so I don't imagine there's much capacity in stage/hybrid mode.

[AnttiL]

I don't know anything but my guess is the maps are ranges for specific RPM's, speeds, gears and maybe even steering angles put together, where the boost should be deployed and how much. You want a milder boost in Monte than in Catalunya.

[Fast Eddie WRC]

In testing some drivers have mentioned how tricky it is to deploy the extra power correctly.

It sounds a bit like the turbo boost in cars decades ago, when there was a lag and then a big slug of torque which could catch you out ie. coming in mid-corner.

I guess the hybrid power is controlled by an ECU map rather than the driver to ensure it is generated and deployed so as not to deplete it entirely.

[EstWRC]

Ott Tänak has praised his Hyundai Motorsport team colleagues on the job they have done developing the all-new i20 N WRC Rally1 car.

https://www.wrc.com/en/news/2021/wrc...-developments/

[Thousandlakes]

One interesting thing is how long will be 5th gear. Are we going to see again +200kmh in some rallies like Finland/Sweden? Or this extra hp is just used to make faster acceleration certain areas in stage. This aspect is interesting to see. How drivers will use extra power and what kind of places.

Like in gravel and snow rallies driver doesn't need to use hybrid immediately after tight junction cause of wheelspin is there anyway. After the grip is there driver can push full power if long straight ahead. Definitely more brain needed with these 2022 cars. There will be driving style changes for example driver need to brake with straight car places where regenerating needed next straight etc.
I generally I see this very interesting.

[lluisva555]

Rally1 Car technical and aero regs and how some have been applied (needs translate)

https://motoresport.cat/2021/12/21/w.../?feed_id=5526

You can find the English version here:

https://www.wrcwings.tech/2021/12/20...aero-trimming/

[Fast Eddie WRC]

Lappi on the new hybrid GR Yaris:

https://www.wrc.com/en/news/2021/wrc...-new-gr-yaris/

[WRCStan]

Is there insight anywhere on how the additional power from the hybrid unit is to be deployed in stages?

There's actually an insight to Hybrid strategy in the regs appendix XV:

A maximum SOC will be imposed at the beginning of the stage. This value will be defined in the official documentation and user guide provided by the FIA-designated single supplier for the hybrid propulsion system.

Why wouldn't the max SOC be 100%?

Maximum energy released, which is dependent on stage length. The value is defined by stage length and rally surface type, and communicated in the supplementary regulations of each event.

If SOC is ≥80% it is compulsory to automatically activate one hybrid boost. At the end of this boost (maximum release energy reached), it is necessary to release the throttle pedal OR press the brake pedal to get another hybrid boost if SOC is still above 80%.

Interesting insight, so one maximum release may be less than 20%. Why would that depend on the stage length? Perhaps short stage is higher %?

Valid Regen: The regen energy counter is active only when the front brake pressure is higher than 5 bars and the throttle pedal is below 30%.

About how heavy a foot is 5 bars? I guess combined with the throttle it won't interfere with normal driving.