Straight-seven engine

Type of internal combustion engine From Wikipedia, the free encyclopedia

A straight-seven engine (also known as a inline-seven engine) is a straight engine with seven cylinders. It is more common in marine applications because these engines are usually based on a modular design, with individual heads per cylinder.

Straight-seven engine with firing order 1-3-5-7-2-4-6

Marine engines

Straight-seven engines produced for marine usage include:

  • Wärtsilä-Sulzer RTA96-C two-stroke crosshead diesel engine[1]
  • Wärtsilä 32 trunk piston engines[2]
  • MAN Diesel IMO two-stroke crosshead diesel engine[3]
  • Burmeister & Wain 722VU37 two-stroke diesel engine (commenced 1937, used in the Danish Havmanden-class submarines
  • Sulzer 7QD42 diesel engine (1939-1940, used in the Dutch O 21-class submarines).[4]
  • English Electric 7SKM diesel engine (used in some Port Jackson & Manly Steamship Company ferries)

Land use

The AGCO Sisu 98HD is a straight-seven diesel engine that was released in 2008.[5] Intended for farming machinery, the engine shares various components with the company's straight-six engine.[6]

References

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