Specification
All 567 engines are two-stroke 45 degree V-engines. The engine is a uniflow design with four Poppet-type exhaust valves in the cylinder head. For maintenance, a power assembly, consisting of a cylinder head, cylinder liner, piston, piston carrier and piston rod can be individually and relatively easily and quickly replaced. The block is made from flat, formed and rolled structural steel members and steel forgings welded into a single structure (a "weldment"). Blocks may, therefore, be easily repaired, if required, using conventional shop tools. Each bank of cylinders has a camshaft which operates the exhaust valves and the Unit injectors.
All engines have mechanically-controlled Unit injectors (patented in 1934 by General Motors, EMD's former owner).
See EMD 645 for general specifications common to all 567-645-710 engines.
Certain 567D engines were offered with turbocharging. The turbocharger is the traditional EMD mechanically-assisted turbo-compressor. During engine startup, and at lower power levels, during which there is not sufficient exhaust heat energy to drive the turbine fast enough for the compressor to supply the air necessary for combustion, the engine drives the compressor through a gear train and an overrunning clutch. At higher power levels, during which there is sufficient exhaust heat energy to drive the turbine fast enough for the compressor to supply the air necessary for combustion, the over-running clutch in the gear train is disengaged, and the turbo-compressor operates as a true turbocharger. Turbocharging provides higher horsepower and good running characteristics at all altitudes. Turbocharging also improves fuel consumption and reduces emissions.
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