FUEL DELIVERY SYSTEM FOR NATURAL GAS SPLIT-CYCLE ENGINE
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United States of America Patent
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Issued Date -
Nov 29, 2012
app pub date -
May 22, 2012
filing date -
May 24, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Methods, systems, and devices are disclosed that generally involve split-cycle engines in which natural gas, and in particular natural gas supplied from a low pressure source, is used as the fuel for combustion. In one embodiment, natural gas is supplied directly to the expansion cylinder via a gas inlet valve just before and/or just after the expansion piston reaches top dead center, when the pressure within the expansion cylinder is relatively low. A crossover expansion valve is then opened to distribute the natural gas in the expansion cylinder and mix it with high pressure air from a crossover passage before ignition during a power stroke. Natural gas split-cycle air hybrid engines are also disclosed.
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