Split-cycle engines with direct injection
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United States of America Patent
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Mar 29, 2016
Grant Date -
Sep 18, 2014
app pub date -
Mar 13, 2014
filing date -
Mar 15, 2013
priority date (Note) -
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Abstract
In some embodiments, split-cycle engines are disclosed that are capable of operating in a normal firing mode in which a firing stroke is performed in the expansion cylinder only on every other rotation of the crankshaft. Fuel can be injected directly into the expansion cylinder during the non-firing rotation of the crankshaft over a period of time greater than what is possible with traditional split-cycle engines. A number of other advantages are associated with such engines. In some embodiments, two expansion cylinders can be provided such that a firing stroke is performed on every rotation of the crankshaft, even though each individual expansion cylinder only performs a firing stroke on every other rotation of the crankshaft. Air hybridized and/or Millerized variations of these engines, as well as various cylinder arrangements, are also disclosed herein.
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