Deere + Company

Lawrence P Tracy

Richard G Norton

The lip of the combustion bowl of a piston for an internal combustion engine has different radii in different sections of the bowl. Most of the lip is sharp to reduce emissions. The part of the lip above the piston pin bore is less sharp to reduce the mechanical stresses that otherwise would accumulate there in a sharp lip, cracking the piston. The lip has a smooth transition between the two radii to avoid creating additional stress.

Engine piston with a dual combustion bowl lip radius

The present invention provides a very simple structure to delay high fuel delivery to a turbocharged engine until a sufficient turbocharger boost pressure is available for adequate combustion, by providing a simple dashpot to limit movement of the throttle shaft. A brea-away throttle lever is used so that the operator can position the control lever at any position, even though the position of the throttle shaft itself is being limited by the dashpot. Preferably, the damping structure is entirely housed within the fuel injector pump, where it will be safe from debris, and constantly flushed with clean fuel.

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Hudson, IA, United States of America

Lawrence P Tracy