What does 'Double Overhead Camshaft' mean in DOHC engines? What are the advantages of DOHC engines compared to single overhead camshaft engines? How does the general principle work? A bit more detailed explanation would be great.
What does DOHC mean then?
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DOHC actually stands for "Double Overhead Camshaft," meaning a dual-cam system, bro. Think of it like this: take an old 2CV with its simple single-cam engine. There, one camshaft controls both the intake and exhaust valves. But with DOHC, it's like having a Ferrari—you get two cams! One for intake, one for exhaust, both sitting on the same cylinder head, each doing its own thing.
And the benefits? Oh man, DOHC engines give the valves way more freedom to open and close, letting the air-fuel mix flow in and out more efficiently. That means you can rev higher, more power, baby! Plus, it plays nice with modern multi-point injection systems. Sure, it’s more complex and expensive than a single-cam setup, but in modern engines, it’s the standard. So yeah, DOHC is like the luxury version of a single-cam motor—just like DS’s hydropneumatic suspension. Luxury means better performance!