| 摘要 |
A compound engine that includes a gas turbine unit and a piston unit wherein a portion of the cycle air for the piston unit is diverted through cooling passages to provide impingement cooling of several areas of the piston unit including the upper cylinder area, the outer and inner surfaces of the exhaust valve and other selected areas of the cylinder head; and there after, the diverted cycle air is reintroduced into the cycle.
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