Patent ID: 9200558
Filing Date: 2015-12-01
Classification: F01N,F02B,Y02T

Abstract:
1. An engine-driven work machine comprising: an engine including a front end tool configured to be driven by the engine, wherein an expansion chamber is connected to the exhaust port via a connection duct, wherein the connection duct includes a first end at a side of the cylinder to which the exhaust port is formed and a second end, and the connection duct extends from the first end in an axial direction of the exhaust port, is bent in a direction away from an axis of the exhaust port, extends in an axial direction of the cylinder and is connected to the expansion chamber at the second end, and wherein the expansion chamber is disposed between the crank case and an inner side of the connection duct which is bent in the direction away from the axis of the exhaust port.