Cold start sound: why does the vehicle sound so good?

Recently updated on December 20, 2022 at 11:22 am

If you search for a performance vehicle on YouTube and the note "Cold start“Search, you will probably get hours of sonorous content displayed. But have you ever wondered why cold starts sound so good? But why does the great sound come back so quickly? The answer is in Hagerty's video embedded below. But unfortunately only in English. But we'll try to write it down briefly in this post. And that's because the engine when it's cold like that ineffizient as possible circulates to warm up quickly. Over time, the reasons for this have evolved, but the basic idea has remained.

Cold start sound

Ironically, the reason the car sounds so “awesome” is because the engine is currently running runs particularly badly. Internal combustion engines are designed to operate when they are hot. If the engine is cold, the fuel will run out not burned properly and the resistances in the engine are greatly increased. And modern cars also have to take care of their catalytic converters. They also need them urgently warmthTo to function properly. The manufacturer's solution is to change the engine for a short time to run largely inefficiently, so that the harmful emissions with the help of a warm cat neutralized as soon as possible can be.

Valve and ignition timing are changed

Modern engines change theirs Valve and ignition timingto be so intentionally fast a lot of warmth to be able to generate. In addition, the speed is increased by a few hundred revolutions. If the warm-up is successful, the engines return to their normal and efficient engine mapping. The procedure is the same as the old one Choke system not dissimilar from then. Modern cars are of course much more advanced and user-friendly. You don't have to do anything by hand here! Either way, the result is better, due to the increased emissions but also with regard to the environment "ugly greeting“From your vehicle to get you excited about the upcoming journey.

Of course that had not happened yet!

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