Rain Light. -H or -K harvesting? or -K torque demand?

[agip]

Sorry if its a stupid question but, is it a mandatory regulation to turn on the rain lights like that? And why? Safety?

[langwadt]

Sorry if its a stupid question but, is it a mandatory regulation to turn on the rain lights like that? And why? Safety?

I can't find it but I believe it is a rule, it is for safety

[joetoml1n]

Sorry if its a stupid question but, is it a mandatory regulation to turn on the rain lights like that? And why? Safety?

I can't find it but I believe it is a rule, it is for safety

It is for safety.. To warn drivers behind when the lead driver is off throttle.

From Autosport:
NEW WARNING LIGHT SYSTEM FOR 2014

The FIA has already moved to minimise the risk of problems of drivers being caught out when the engines automatically cut throttle to help reduce fuel use.

"If you are flat out on the straight and you are above a certain threshold - above 95% throttle for more than one second, and you are above 180km/h and you see a 120KW torque reduction - it flashes the rear light for a second to warn the driver behind."

This system only works on the automatic fuel saving modes, and does not cover the situation of drivers suddenly adopting 'lift and coast' tactics.

[supertweet]

It is for safety.. To warn drivers behind when the lead driver is off throttle.

From Autosport:

"If you are flat out on the straight and you are above a certain threshold - above 95% throttle for more than one second, and you are above 180km/h and you see a 120KW torque reduction - it flashes the rear light for a second to warn the driver behind."

This system only works on the automatic fuel saving modes, and does not cover the situation of drivers suddenly adopting 'lift and coast' tactics.

Joe, a few questions about the flashing rain light. I thought the rain light also flashed with during the following situations:

*ICE power reduced @ full throttle, -K and -H supplying full power
*-K reducing % of rated 120KW at full throttle in addition to aforementioned transition to harvesting mode.
*Per your 1st sentence, when driver transitions off throttle but w/ no brake application (i.e. near end of straight/lift&coast)

Is this your understanding?

[joetoml1n]

It is for safety.. To warn drivers behind when the lead driver is off throttle.

From Autosport:

"If you are flat out on the straight and you are above a certain threshold - above 95% throttle for more than one second, and you are above 180km/h and you see a 120KW torque reduction - it flashes the rear light for a second to warn the driver behind."

This system only works on the automatic fuel saving modes, and does not cover the situation of drivers suddenly adopting 'lift and coast' tactics.

Joe, a few questions about the flashing rain light. I thought the rain light also flashed with during the following situations:

*ICE power reduced @ full throttle, -K and -H supplying full power
*-K reducing % of rated 120KW at full throttle in addition to aforementioned transition to harvesting mode.
*Per your 1st sentence, when driver transitions off throttle but w/ no brake application (i.e. near end of straight/lift&coast)

Is this your understanding?

I understood it as the driver being full throttle (using ERS) until the MGU/ERS enters a harvesting mode which is when the light flashes. 120KW is the maximum output of the MGU-K, so it would imply there can be no MGU-K power delivery when the light is flashing.
Charlie has said the system is configurable and therefore may change. I can't find any details of the system in the regulations, so it must be programmed into the ECU? or ERS by the engine manufacturer? In either case it's not surprising the parameters haven't been defined or readily available.