Internal combustion engine and hand-held power tool with internal combustion engine
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United States of America Patent
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N/A
Issued Date -
Dec 26, 2013
app pub date -
Dec 7, 2012
filing date -
Dec 7, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An internal combustion engine of a hand-held power tool has a crankcase having a circumferential wall extending in a circumferential direction of the crankcase. A crankshaft is supported so as to be rotatable about an axis of rotation within the crankcase. At least one transfer passage extends from the crankcase into the cylinder of the engine, wherein the transfer passage has an inlet port at the crankcase. At least one fuel retaining device is disposed on the circumferential wall of the crankcase. A radial direction, starting at the axis of rotation of the crankshaft and extending outwardly, extends through the at least one fuel retaining device. The at least one fuel retaining device has a depth in the radial direction and a length in the circumferential direction. The at least one fuel retaining device, relative to the radial direction, has an asymmetric cross-section in the circumferential direction.
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