camshaft
4
6.4
- noun
- /ˈkæmʃæft/
- Specialized
- The engine's performance improved significantly after I replaced the old camshaft with a high-performance model.
- overhead camshaft
- dual overhead camshaft
- camshaft, 24-valve
Examples
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I need to build a chassis to accommodate a double camshaft.
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Electric actuators will displace the steel camshaft on every valved engine.
Academic text (2005) -
Fred and Augie Duesenberg were self-taught engineers who were making engines with overhead camshafts and four valves per cylinder almost a century ago.
Blog text (17) -
The direct injection pump is mounted in the "valley" between cylinder heads—beneath the intake manifold—and is driven by the camshaft at the rear of the engine.
Blog text (34) -
The rocker gear and tube are carried by the top half of the camshaft bearings, and removal of the camshaft-bearing nuts enables the rocker shaft and bearings to be pulled away in one section and the camshaft to be lifted out.
Blog text (14) -
To optimize the engine's efficiency, he decided to install a new double overhead camshaft with better timing.
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During the repair, they discovered that the faulty camshaft was causing the intake valves to malfunction.
Surface Forms
Morphology
Etymology
The word camshaft comes from cam, an old word for a 'bump' or 'bent piece that pushes', and shaft, meaning 'a long rod'. So a camshaft is literally a 'rod with bumps' that push the engine valves to open and close, which explains its modern meaning.