Fuel-stratified combustion chamber in a direct-injected internal combustion engine
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United States of America Patent
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Mar 20, 2018
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N/A
app pub date -
Nov 5, 2013
filing date -
Nov 7, 2012
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Abstract
A combustion chamber is provided within an internal combustion engine, the chamber bounded by a cylinder bore, a primary end, and a secondary end. The secondary end reciprocates between a TDC position nearest the primary end and a BDC position. Induction and exhaust ports are timed to open and close to transfer air into, and gasses from, the chamber. The chamber becomes fuel stratified when the secondary end is positioned within a stratified distance of the primary end. When stratified, the chamber is comprised of a central region, a perimeter region, and a transfer passageway between regions. A fuel injector at the primary end injects fuel only into the central region and only prior to ignition. The perimeter region pumps air into the central region prior to ignition, creating tumble turbulence. Combustion is initiated near TDC in the central region and concluded near TDC in the transfer passageway.
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