Patent ID: 7779793

Claim:
An engine-driven work machine driven by an engine, the work machine and the engine being supported on a frame with a resilient member interposed therebetween, the work machine comprising: a duct member integrally attached to the engine and the work machine and defining a continuous cooling-air passage between the duct member and outer peripheral surfaces of the engine and the work machine; a cooling fan disposed on an inlet side of the cooling-air passage, the cooling fan feeding cooling air, under pressure, toward the engine and the work machine; and a silencing plate integrally attached to the duct member via a plurality of stays and facing an inlet of the cooling-air passage with a ventilation gap defined therebetween, wherein the silencing plate directly opposes the cooling fan and has an area which opposes the inlet and is larger than an opening area of the inlet, wherein the frame comprises left and right sidewall plates, and the machine further comprises an intake box disposed between the left and right sidewall plates, the intake box being in communication with an outside of the frame and the silencing plate disposed inside the intake box, and wherein the ventilation gap is formed around the stays, the stays being arranged annularly and mounted to a circular upstream end of the duct member.