Crosshead Pistons:
Large slow-speed Diesel engines may require additional support for the side forces on the piston. These engines typically use crosshead pistons. The most piston includes a large connecting rod extending downwards from the piston to what’s effectively a second smaller-diameter piston. The most piston is answerable for gas sealing and carries the piston rings. The smaller piston is solely a mechanical guide. It runs within a tiny low cylinder as a trunk guide and also carries the pin.
Lubrication of the crosshead has advantages over the trunk piston as its oil isn’t subject to the warmth of combustion: the oil isn’t contaminated by combustion soot particles, it doesn’t break down because of the warmth, and a thinner, less viscous oil could also be used. The friction of both piston and crosshead could also be only 1/2 that for a trunk piston.
Because of the extra weight of those pistons, they’re not used for high-speed engines. Read and learn about car Technical FAQ and get in-depth details of the car features.
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