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Top 100: In-Cylinder Techniques Simplify Design

A modular common-rail fuel system and advanced in-cylinder combustion technology were key elements in bringing the Cummins 19-liter QSK19 engine into Tier-3 compliance...

December 01, 2005

QSK19A modular common-rail fuel system and advanced in-cylinder combustion technology were key elements in bringing the Cummins 19-liter QSK19 engine into Tier-3 compliance. The new fuel system, working with an upgraded electronic control module, achieves peak injection pressures of up to 23,500 psi and maintains peak pressures independent of engine speed, load factors or fueling capability. In the power cylinder, use of a new single-piece Ferrous Cast Ductile (FCD) iron piston yields a 10 percent increase in durability and reduces oil consumption by 20 percent, says Cummins, compared to the predecessor QSK19.

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