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Publication numberUS3124930 A
Publication typeGrant
Publication dateMar 17, 1964
Filing dateMar 20, 1959
Publication numberUS 3124930 A, US 3124930A, US-A-3124930, US3124930 A, US3124930A
InventorsWalter H. Powers
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Exhaust system
US 3124930 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

March 17, 1964 w. H. POWERS EXHAUST SYSTEM Filed March 20, 1959 w v? a INVENTOR. )4 d/Z er azaers.

/ JW Yz/S United States Patent O 3,124,930 EXHAUST SYSTEM Walter H. Powers, Jackson, Mich, assignor, by mesne assignments, to Walker Manufacturing Company, Racine, Wis, a corporation of Delaware Filed Mar. 2:0, 1959, Ser. No. 800,670 1 Claim. (6i. 60-40) My invention relates to internal combustion engines, and in particular to apparatus for burning unburned hydrocarbons found in the exhaust gases of internal combustion engines.

The aim of my invention is to provide a smog eliminating device which will be less expensive to install on an automobile than devices of the type currently being considered.

Briefly, in accordance with my invention I provide an internal combustion engine with a hydrocarbon burner that is located close to and preferably in the exhaust manifold and which acts as a smog eliminator. Preferably, the pre-burner comprises a catalyst screen or element which is attached to the gasket between the exhaust manifold and engine block. Thus, the gases leaving the cylinders will, while very hot, be in contact with the catalyst member. At the high temperatures available at this point, it is possible to effectively remove a substantial percentage of the unburned hydrocarbons.

By locating the burner in a position close to or within the manifold, I utilize the available heat to burn the excess hydrocarbons and permit downstream silencing of the exhaust gases to be carried out without special regard for smog elimination. Thus, optimum silencing can be obtained along with elimination of excessive hydrocarbons.

The invention is illustrated in the accompanying drawings in which:

FIGURE 1 is a side elevation of a six cylinder internal combustion engine embodying the invention.

FIG. 2 is an enlarged view of the exhaust manifold showing the secondary air harness attached to the exhaust manifold.

FIG. 3 is a section taken along the line 33 of FIG. 2, and

FIG. 4 is a section taken along the line 4-4 of FIG. 3.

The exhaust manifold 1 that is associated with the internal combustion engine 3 is entirely conventional in all respects. Thus, it has branch lines 5 which receive the exhaust gases from the outlet ports 6 of the cylinders of the engine and feed them into a common chamber 7 which empties into the exhaust line 9. Each branch 5 3,124,930 Patented Mar. 17, 1964 See terminates in a pad 11 which is bolted to the engine block and has a flat face 13 hearing against a gasket 15.

In accordance with my invention I attach a catalytic element to each gasket 15 so that gases flowing into the manifold will pass through or in contact with the element. The catalytic element in combination with the high temperatures at the inlet to the exhaust manifold will cause a more complete combustion of the unburned hydrocarbons to occur in the exhaust manifold. While it is broadly within the scope of my invention to use any suitable catalyst in any suitable form, I presently prefer that the catalytic element be the metal nickel in the form of a screen cup 17. Each nickel screen cup 17 is preferably secured by a suitable retainer or by an interlock fit to a gasket 15 around the edge of the opening in the gasket. Thus, the combined gasket and catalyst can be supplied as an inexpensive, easily installed replacement part.

In the event that it is necessary for complete combustion, I provide means for the introduction of secondary air to the branches 5 at points adjacent the screen 17, i.e. where combustion will occur. The air is fed into the manifold sections 5 by branch lines 19 from a header 21. Air is supplied under pressure to header 21 by line 23 connected to the outlet of an 'air pump 25 which is mounted on the side of the engine and driven by the fan belt 27 of the engine. Broadly speaking, the air pump may be of any suitable type that is available on the open market and can either furnish air at high pressure and low volume or at low pressure and high volume.

I claim:

A smog reducing element comprising a gasket to fit between an exhaust manifold and an engine and a catalytic element attached to the gasket.

References Cited in the file of this patent UNITED STATES PATENTS 1,179,145 Southern Apr. 11, 1916 1,532,473 Byrne Apr. 7, 1925 1,690,080 Seng et al Oct. 30, 1928 1,736,132 Rippingille Nov. 19, 1929 1,789,812. Frazer Jan. 20, 1931 2,004,865 Grison June 11, 1935 2,217,241 Tendler Oct. 8, 1940 2,263,318 Tifft Nov. 18, 1941 2,503,289 Nettel Apr. 11, 1950 FOREIGN PATENTS 38,371 France May 30, 1931 (Addition to No. 691,110) 338,933 Great Britain Nov. 24, 1930

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1179145 *Oct 5, 1915Apr 11, 1916William SouthernApparatus for purifying exhaust engine-gases.
US1532473 *Jul 12, 1920Apr 7, 1925Gen Motors CorpExhaust fire screen
US1690080 *Jul 27, 1927Oct 30, 1928Michell Crankless Engines CorpSupercharger internal-combustion engine and method of supercharging
US1736132 *Jul 14, 1927Nov 19, 1929Delco Remy CorpEngine-starting apparatus
US1789812 *Aug 12, 1929Jan 20, 1931Joseph C W FrazerMethod of eliminating combustible constituents from the products of combustion of an internal-combustion engine
US2004865 *Jan 25, 1933Jun 11, 1935Grison JosephExhaust gas purifier for vehicles
US2217241 *Jul 6, 1936Oct 8, 1940Tendler MaxExhaust manifold for internal combustion engines
US2263318 *Sep 1, 1937Nov 18, 1941Harold C TifftInternal combustion engine
US2503289 *Apr 5, 1948Apr 11, 1950 Supercharged internal-combustion
FR38371E * Title not available
FR691110A * Title not available
GB338933A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3263412 *Dec 28, 1962Aug 2, 1966Arthur J HansmannMethod and means for eliminating smog
US3354635 *Apr 6, 1966Nov 28, 1967Mutual Ind IncMeans for burning the exhaust gases of internal combustion engines
US3415055 *Jul 24, 1967Dec 10, 1968Mutual Ind IncExhaust burners for internal combustion engines
US3475905 *Jan 23, 1967Nov 4, 1969Wilford Edward BurkeInternal combustion engine
US3786635 *Dec 20, 1971Jan 22, 1974Krun CorpInternal combustion engine with modified and controlled exhaust
US3808806 *Apr 28, 1972May 7, 1974H NakamuraExhaust gas purifying device
US3853483 *Oct 18, 1972Dec 10, 1974Air Prod & ChemExhaust gas catalytic treatment system
US3866551 *Sep 6, 1973Feb 18, 1975Sanga YasuhiroCombustion furnace
US3926565 *Mar 12, 1974Dec 16, 1975DegussaApparatus for cleaning exhaust gases
US3998599 *Jan 23, 1976Dec 21, 1976Gould Inc.System for catalytic reduction of NOx emanating from an internal combustion engine
US4122673 *Mar 10, 1977Oct 31, 1978J. EberspacherInternal combustion engine with afterburning and catalytic reaction in a supercharger turbine casing
US5007499 *Feb 23, 1990Apr 16, 1991Carrier CorporationSilencer for a centrifugal compressor
US5338903 *Nov 17, 1993Aug 16, 1994Briggs & Stratton CorporationCombination muffler and catalytic converter
US5339629 *Mar 5, 1993Aug 23, 1994Briggs & Stratton CorporationExternal catalytic converter for small internal combustion engines
US5425236 *Oct 23, 1992Jun 20, 1995Schwaebische Huettenwerke GmbhCatalyzer arrangement for the exhaust gases of an internal combustion engine
US6062020 *Nov 12, 1997May 16, 2000General Motors CorporationExhaust manifold converter apparatus
WO2006041396A1 *Oct 11, 2005Apr 20, 2006Electrolux AbCatalyst muffler preferably for a two-stroke internal combustion engine
U.S. Classification60/302, 422/177, 277/918, 55/DIG.300, 277/591
International ClassificationF01N3/32, F01N3/28, F01N13/10
Cooperative ClassificationF01N3/2882, F01N2260/08, F01N3/32, F01N2330/12, F01N13/10, Y02T10/20, F01N3/2839, F01N3/2807, Y10S55/30, Y10S277/918
European ClassificationF01N3/28D, F01N3/28B2, F01N3/32, F01N3/28C