Muffler with cyclonic plates
A muffler comprising a multiplicity of plates, each plate having openings for directing gas flow is provided. The present invention's objective is to reduce engine noise while minimizing back pressure on the engine. It uses a series of plates with deflecting elements fixedly attached to the plates. These deflectors are intended to move the exhaust gases from a longitudinal motion to a cyclonic or swirling motion, so as to translate the gases longitudinal motion into a circular motion. This energy translation will reduce the gas' pressure as it exits the muffler and reduces the engine's noise, without the necessary use of sound absorbing materials or a resonating chamber. This energy translation does not affect the rate
This invention relates to the field of mufflers for internal combustion engines.
BACKGROUND OF THE INVENTIONThis invention relates to a muffler design, and an alternative method to damp the acoustic vibrations of an internal combustion engine's exhaust gases. Traditional methods include resonating chambers and sound absorbing materials.
Soares U.S. Pat. No. 3,963,092 shows a muffler design for competitive car engines. This muffler appears to include a combination of a tube, surrounded by a plurality of spiral baffles with axially separated radial edges, to create a swirl in some of the exhaust gas' motion. This induced swirl is constant in angle and direction while some of the gases flow through a tube.
Lyman U.S. Pat. No. 4,109,753 shows a louver tube assembly with a gas diffuser. This diffuser appears to direct the exhaust gases towards sound absorbing materials.
Kim U.S. Pat. No. 6,554,100 shows a muffler system including a sub muffler, that uses an eddy generating helical core member in a serpentine configuration, to reduce the pressure on the exhaust system.
Weinhold U.S. Pat. No. 7,073,626 shows an engine exhaust muffler with guide vanes imparting a successfully alternating spiral gas flow. This reference shows a series of discs with free leading and trailing edge directors, surrounding a central tube, within the muffler core. These discs claim to direct the air, so as to cancel out the sound waves.
SUMMARY OF THE INVENTIONThe present invention's objective is to reduce engine noise while minimizing back pressure on the engine. It uses a series of plates with deflecting elements fixedly attached to the plates. These deflectors are intended to move the exhaust gases from a longitudinal motion to a cyclonic or swirling motion, so as to translate the gases longitudinal motion into a circular motion. This energy translation will reduce the gas' pressure as it exits the muffler and reduces the engine's noise, without the necessary use of sound absorbing materials or a resonating chamber. This energy translation does not affect the rate of gas flow, so it should minimize the negative effects of engine back pressure.
Inside the muffler chamber 1 is at least one cyclonic plate 3. If there is more than one plate 3, then they are spaced apart at a gap 4 according the engine requirements, torque and speed. This gap 4 may vary between each plate. The plates 3 are fixedly attached to the muffler housing 10 using some mechanical means such as welding, bolts or a press fit. The plates 3 are approximately parallel to each other. The circumference and cross sectional area of plate 3 is designed to match the interior of muffler housing 10. The thickness of plate 3 may be approximately one eighth of an inch thick.
The muffler cross sectional area may be constant or varying.
Although this invention has been described with respect to specific embodiments, it is not intended to be limited thereto and various modifications which will become apparent to the person of ordinary skill in the art are intended to fall within the spirit and scope of the invention as described herein taken in conjunction with the accompanying drawings and the appended claims.
Claims
1. An engine muffler comprising,
- at least one elongated chamber bordered by a housing, with an inlet end and an outlet end and a longitudinal axis, at least one planar plate located inside the chamber and fixedly attached to the housing, said plate positioned perpendicular to the longitudinal axis;
- at least one slot in each plate; and
- at least one exhaust gas deflector on each plate, having a fixed leading edge and a free trailing edge positioned in proximity to a slot, so as to deflect the gas passing though the slot in a cyclonic direction.
2. An engine muffler as in claim 1 with at least two plates, where the angle of the gas deflector on each successive plate is at least five degrees different to the angle of the deflector of the previous plate, so as to create a modified cyclonic direction with each plate.
3. An engine muffler as in claim 2, where the direction of the gas deflectors on each successive plate is approximately opposite to the direction of the deflectors of the previous plate, so as to create alternating cyclonic motion with each plate.
4. An engine muffler as in claim 2, where the angle of the gas deflectors on each successive plate is decreased with each successive plate, so as to create an increased cyclonic motion with each plate.
5. An engine muffler as in claim 1 where the muffler has a varying cross section along the longitudinal axis.
6. An engine muffler as in claim 1 where the muffler has an increasing cross sectional area along the longitudinal axis.
7. An engine muffler as in claim 1 where the muffler contains six plates.
8. An engine muffler as in claim 1 where the plates have at least four slots and four deflectors.
9. An engine muffler as in claim 1 where the plates are approximately one eighth of an inch thick.
10. An engine muffler as in claim 1 where the slots are approximately one inch square.
11. An engine muffler as in claim 1 where the muffler has an inlet tube connected to the inlet section of the chamber.
12. An engine muffler as in claim 1 where the inlet tube has perforations in it, to disturb the air flow through the muffler.
13. An engine muffler as in claim 1 where the gap between any two plates is fixed.
14. An engine muffler as in claim 13 where the gap between any two plates is approximately three inches.
15. An engine muffler as in claim 1 where gap between plates varies.
16. An engine muffler of claim 1 comprising,
- at least one elongated chamber bordered by a housing, with an inlet end and an outlet end and a longitudinal axis, at least one planar plate located inside the chamber and fixedly attached to the housing mechanical means, said plate positioned perpendicular to the longitudinal axis;
- a multiplicity of slots in each plate; and
- each slot having an exhaust gas deflector on each plate, wherein each gas deflector having a fixed leading edge and a free trailing edge positioned in proximity to a slot, so as to deflect the gas passing though the slot in a cyclonic direction, and each gas deflector on each plate being positioned at a similar angle to each other.
Type: Application
Filed: Aug 13, 2007
Publication Date: Feb 19, 2009
Inventor: Paul H. Counts (Haysville, KS)
Application Number: 11/891,778
International Classification: F01N 1/00 (20060101);