Handheld work apparatus, and exhaust gas after-treatment unit for a handheld work apparatus, and exhaust muffler

Abstract

A handheld work apparatus includes a combustion engine and an exhaust muffler. A first muffler chamber and a second muffler chamber are formed in the exhaust muffler. The exhaust muffler includes an exhaust gas after-treatment unit which includes at least one through-flow unit. The through-flow unit is disposed in a flow path from the first muffler chamber into the second muffler chamber. The thickness of the through-flow unit measured from an upstream end face to a downstream end face of the through-flow unit in the region of the through-flow unit passed through by a flow of exhaust gas is at least 10 mm across at least 70% of the cross section. The exhaust gas after-treatment unit does not have a catalytically effective coating.

Images