Combined silencer and spark arrester
AssigneeFG Wilson (Engineering) Limited
InventorsJonathan R. Craig, Samuel J. Kirkpatrick, Graeme H. Mawhinney
Life of this patent
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Abstract
A silencer for silencing exhaust gases includes an acoustic resonator chamber that serves as a spark arrester to trap burning carbon particles and prevent them passing to the atmosphere. The silencer has an exhaust gas inlet and an exhaust gas outlet. Exhaust gases pass from the inlet to the outlet through a first passage and into a first chamber. The first chamber communicates with an acoustic resonator chamber by means of a connecting passage. The connecting passage is positioned adjacent the first passage so that sparks in the exhaust enter the acoustic resonator chamber where they are trapped. The silencer thus avoids the need for a separate spark arrester, as required by prior art silencers.
Claims20
A silencer for silencing exhaust gases comprising an exhaust gas inlet, an exhaust gas outlet, a first chamber and a first passage having first and second ends, the first chamber and first passage being arranged such that exhaust gases passing from said exhaust gas inlet to said exhaust gas outlet pass from the first end of said first passage to the second end of said first passage and hence through said first chamber, wherein the second end of said first passage communicates with said first chamber, wherein the silencer further includes at least one acoustic resonator chamber connected by a connecting passage to said first chamber, and wherein the connecting passage is positioned proximate the second end of said first passage.
A method of arresting sparks in a silencer comprising the steps of:
- causing exhaust gases to flow from an exhaust gas inlet to an exhaust gas outlet via a first chamber,
- providing an acoustic resonator chamber connected by a connecting passage to said first chamber, and
- directing the flow of exhaust gases through said first chamber such that particles in said exhaust gases are caused to enter the acoustic resonator chamber and become trapped therein.
Dependencies are inferred from the claim text.