In an Overhead Camshaft (OHC) engine, the camshaft is located in the cylinder head, above the combustion chamber and valves.
🔧 Explanation:
- The camshaft directly operates the intake and exhaust valves using rocker arms or direct tappets.
- It is driven by a timing belt, chain, or gears connected to the crankshaft.
📌 Variants:
| Type | Camshaft Location |
|---|---|
| SOHC | One camshaft above the cylinder head operates both intake and exhaust valves. |
| DOHC | Two camshafts above the cylinder head: one for intake valves, one for exhaust valves. |
✅ Advantage of This Location:
Placing the camshaft overhead allows more direct control of valve timing, reduces mechanical losses, and improves engine efficiency and performance compared to older OHV (Overhead Valve) designs, where the camshaft is inside the engine block.
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