A Cylinder Head Comprising A Shroud

Abstract

An engine comprising an engine block, and the engine block comprises a cylinder. The engine further comprises a cylinder head mounted to the engine block, and the cylinder head comprises an intake valve seat and a shroud.

Description

technical field [0001] The present disclosure relates to a cylinder head including a shroud. Background technique [0002] As the cost of diesel engines continues to increase, some engine manufacturers are recognizing that there is an opportunity in certain applications to switch away from more expensive diesel engines and towards less expensive spark-ignition engines. Spark ignition (SI) engines are sometimes less expensive than diesel engines because they use relatively affordable aftertreatment solutions (e.g., three-way catalysts), yet their performance in some applications is only Same with diesel engines. [0003] The ability of an SI engine to approach diesel engine performance lies at least in part in combustion system efficiency, which can be largely a function of in-cylinder charge motion (eg, tumble) prior to combustion time. In the absence of strong tumble, there may be poor fuel and air homogeneity, low total kinetic energy at the time of combustion, slow burn...

AI Technical Summary

Problems solved by technology

Known aggressive tumble SI engines often have complex, expensive cylinder head, intake manifold, and valve train designs

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