2014 Engine yin yang

[dren]

Do the regulations call for a torque map of the power unit vs pedal position, or is it just the ICE? I think it's the power unit. That would take out a push KERS system.

[Holm86]

Do the regulations call for a torque map of the power unit vs pedal position, or is it just the ICE? I think it's the power unit. That would take out a push KERS system.

5.5 Power unit torque control :
5.5.1 The only means by which the driver may control acceleration torque to the driven wheels is via a single chassis mounted foot (accelerator) pedal.

5.5.4 At any given engine speed the driver torque demand map must be monotonically increasing for an increase in accelerator pedal position..

This is what the regulations says. This is what caused me to believe that the ERS activations must happen through the accelerator pedal and not via a push-button on the steering wheel.

I guess they are allowed to change between ERS torque-maps on a switch on the steering wheel. Just as with the ICE where you can shift between max power, wet or fuel saving etc. maps.

edit: It also says this though.

5.5.3 The accelerator pedal shaping map in the ECU may only be linked to the type of the tyres fitted to the car : one map for use with dry-weather tyres and one map for use with intermediate or wet-weather tyres.

So only a wet and a dry map is allowed.

[Dragonfly]

That doesn't prevent the possibility to adjust power output from the steering wheel to more aggressive (overtake) and less aggressive or conservative. AFAIK they have it now with the same engine map restrictions. And historically different modes have always been present, be it only rich and lean adjustment.

[turbof1]

That doesn't prevent the possibility to adjust power output from the steering wheel to more aggressive (overtake) and less aggressive or conservative.

Yes my thoughts exactly. These same rules apply this year, yet a kers push button and diverse kers settings are obviously allowed. I think those rules only apply on the engine.

[Holm86]

That doesn't prevent the possibility to adjust power output from the steering wheel to more aggressive (overtake) and less aggressive or conservative.

Yes my thoughts exactly. These same rules apply this year, yet a kers push button and diverse kers settings are obviously allowed. I think those rules only apply on the engine.

It says power unit. Not engine.

[turbof1]

A closer look does feature some key differences in wording, yes.

However, I still don't see why they wouldn't allow manual output change. They have several engine settings nowadays to control fuel consumption; in essence you'd only be changing the output of the mgu-k, nothing more. It isn't a map.

[Abarth]

5.5.1 clearly doesn't allow for push button.

As I understand 5.5.3, it seems even that you cannot have more than two maps.
Something which is not corresponding to some interviews and articles about the new cars. I don't get it, really.

[Holm86]

5.5.1 clearly doesn't allow for push button.

As I understand 5.5.3, it seems even that you cannot have more than two maps.
Something which is not corresponding to some interviews and articles about the new cars. I don't get it, really.

I agree. Im also confused at the moment.

5.5.2 Designs which allow specific points along the accelerator pedal travel range to be identified by the driver or assist him to hold a position are not permitted.

This also removes the possibility of a kick-down device to activate the ERS.

[wuzak]

5.5.1 clearly doesn't allow for push button.

As I understand 5.5.3, it seems even that you cannot have more than two maps.
Something which is not corresponding to some interviews and articles about the new cars. I don't get it, really.

Two maps for the throttle.

Ie, the the curve that the engine throttle follows in response to changes in the foot pedal position.

If you were allowed an unlimited set then the engineers could, conceivably, set one for each corner such that the driver selects the appropriate setting on approach, then after braking simply applies full throttle position, and the ECU figures the rest out.

This different to engine maps (fuelling, ignition) and ERS strategies.

[Richard]

As I recall from the cold/hot blowing debacle at Silverstone last year, the throttle map is simply the signal from the throttle pedal. There are plenty of other maps that control other aspects of the engine, gearbox and differential.

[Holm86]

I asked Scarbs and got this answer.

Power can only be demanded by the pedal. Up until now the pedal provided engine power and button directly supplied kers power.
Next year the driver will get both solely from the pedal. However, the driver can select a map from the steering wheel that opens up maximum ers boost for overtaking, the button only selects the map, but the pedal demands the power. Its a subtle difference.

So no kers push-button. And there will be different maps to choose from.

[turbof1]

Seems right to me. If there were no different mgu-k maps to choose from, the maximum of 4MJ wouldn't hold any value.

Question: is there a restriction on the amount of energy the teams can store for the mgu-k? If there aren't, cars could come with fully charged 12MJ batteries at the start.

[wuzak]

Seems right to me. If there were no different mgu-k maps to choose from, the maximum of 4MJ wouldn't hold any value.

Question: is there a restriction on the amount of energy the teams can store for the mgu-k? If there aren't, cars could come with fully charged 12MJ batteries at the start.

Can't store more than 4MJ.

The energy store has to be between 20 and 25kg, and so getting that to hold 4MJ, let alone 12, would be tough.

[Holm86]

Seems right to me. If there were no different mgu-k maps to choose from, the maximum of 4MJ wouldn't hold any value.

Question: is there a restriction on the amount of energy the teams can store for the mgu-k? If there aren't, cars could come with fully charged 12MJ batteries at the start.

Yes. It was also my original thought. But the answer I was looking for was the one about the button activated ERS.

I think they are only allowed to start the race with what matches 1 lap of storage from the MGU-K which is 2MJ.

[turbof1]

Thanks.

I really like these rules about the mgu-k. It means that being stuck behind a slower means you could use like 0.2-0.5MJ a lap less then the standard 2MJ, ending up a few laps later with a surplus of 2MJ, allowing you to fully boost to 4MJ. High risk high reward.