Launch Control Boost aim - how

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Launch Control Boost aim - how

Postby SteveC on Sat Sep 25, 2021 3:47 pm

quick question.

On the boost aim in launch control say set this to 70kpa - where does it get the data from to achieve this - does it pull it in from the anti lag strategies to retard the ignition to create positive boost or is it completely separate - if so where is the retard settings on the launch control

thanks
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Re: Launch Control Boost aim - how

Postby SteveC on Sat Sep 25, 2021 4:29 pm

It is just the rpm that creates the boost ?
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Re: Launch Control Boost aim - how

Postby SDean on Mon Sep 27, 2021 10:00 am

Engine speed limiting during Launch uses the Engine Speed table and Engine Speed Margin . The primary means of control is ignition retard.

While engine speed is above Launch Engine Speed, the Ignition Timing Limit Advance system attempts to control engine speed using closed loop control of ignition timing. If Engine Speed exceeds (Launch Engine Speed + Engine Speed Margin), a hard limit (ignition cut or/and potentially fuel cut) is applied. This allows turbocharged engines to develop boost pressure prior to launch.

This system aids initial take-off by means of ignition retard, engine speed limiting, electronic throttle control and boost aim control. It also provides fuel volume trimming to assist exhaust cooling.
Stephen Dean
MoTeC Research Centre Melbourne, Australia
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Re: Launch Control Boost aim - how

Postby SteveC on Thu Sep 30, 2021 7:39 am

Perfect explanation - thanks ;)
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