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Glite Dictionary
valve-in-head engine

valve-in-head engine

8.5
An engine with the parts that let air in and let exhaust out at the top of the cylinders
  • noun
  • Specialized
translation icon : motor de válvula en cabeza
  • The mechanic explained that the car used a valve-in-head engine for better efficiency.

Examples

  • Many modern cars use a valve-in-head engine design.

  • Many classic trucks from the 1950s were equipped with a valve-in-head engine.

  • When restoring old motorcycles, I often encounter the term valve-in-head engine.

  • The new valve-in-head engine improves fuel efficiency.

  • Many classic trucks from the 1950s were equipped with a valve-in-head engine.

  • The mechanic explained that the car used a valve-in-head engine for better efficiency.

  • Many modern cars use a valve-in-head engine design.

Surface Forms

valve-in-head engine singular
valve-in-head engines plural

Morphology

valve-in-head + engine

The phrase transparently describes an engine whose valves are located in the cylinder head: 'valve' + 'in' + 'head' specifies valve position, modified by 'engine'. Although somewhat technical, the composition follows normal English noun-modifier patterns, so a learner who knows the constituent words can infer the meaning.

Etymology

Valve-in-head engine gets its name because the valves are placed in the head, the top part of each cylinder. Think of small doors at the engine's top that let air go 'in' and 'out'; that image explains why the term means an engine with both valves in the head and why this design helps the engine work better.