WRC Testing

**AnttiL** · 22nd June 2021, 19:37

Originally Posted by Mirek

And that is perfectly logical. Having an ALS in a hybrid car would be ridiculous.

Can you please explain this to someone who is not an engineer?

The electric motor will do the same job as ALS? So there will be no more banging sound?

**steve.mandzij** · 22nd June 2021, 19:57

As far as I understand, removing the fresh air ALS will also improve emissions, no?

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**Mirek** · 22nd June 2021, 20:02

Originally Posted by AnttiL

Can you please explain this to someone who is not an engineer?

The electric motor will do the same job as ALS? So there will be no more banging sound?

Yes, the function of ALS is to keep the turbo rotating at maximum speed when the throttle valve is closed. The larger the turbo, the higher inertia it has and the more it suffers from lagging. It means it takes more time to accelerate it to full speed and to deliver the maximum boost. The electric engine can add the torque which is missing without ALS during the initial acceleration. It removes the bang but it also removes the main source of fuel inefficiency, i.e. it is somewhat green while the car performance doesn't suffer.

Originally Posted by steve.mandzij

As far as I understand, removing the fresh air ALS will also improve emissions, no?

Yes, for sure.