2025 PP CX-5 Cylinder Deactivation Question

[N7turbo]

There is a lot of speculation and some incorrect info in that thread

It works exactly as I said on CX5, which of course has a standard NA engine, and is not a hybrid. Its starter is spark/compression assisted

Isn't that exactly what they were saying? I don't see the incorrect info.

 

[Moonlighter]

Isn't that exactly what they were saying? I don't see the incorrect info.

They were saying all sorts of things in that thread.

I am happy that you now agree that my original description of how the Mazda iStop works was correct.

 

[hsdejong]

How hybrid stop/start systems do it is irrelevant.

Hmm, not entirely.

I have a 2023 CX-5 Mild Hybrid.
In a mild hybrid, the i-Stop function doesn’t rely on the starter motor, but on the starter-generator, which is connected to the crankshaft via a belt. When the engine is running, the starter-generator charges the 24V lithium battery and, through a DC/DC converter, also charges the 12V EFB battery.

Restarting from i-Stop works the same way as in the non-mild hybrid version, except that it doesn’t use the starter motor (which is reserved for cold starts). Instead, it relies on the starter-generator powered by the 24V lithium battery. I assume the compression/spark ignition process remains the same.

During braking, the starter-generator recovers energy and charges the 24V lithium battery. When accelerating, it provides a small boost of power to the engine, making take-off from a standstill smoother and helps save a little fuel.
This applies to both manual and automatic transmission models.

 

[N7turbo]

They were saying all sorts of things in that thread.

I am happy that you now agree that my original description of how the Mazda iStop works was correct.

I never disagreed with it—I merely recalled something about the information on that page you linked being only half correct and that past discussions have occurred about how it really works. Those discussions mirror how you describe it. That page claims that the engine is started using only ignition, which isn't possible.