IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0515981
(1983-07-21)
|
우선권정보 |
AU-198204998 (1982-07-22) |
발명자
/ 주소 |
|
대리인 / 주소 |
Stevens, Davis, Miller & Mosher
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
2 |
초록
▼
A tuneable exhaust pipe for an internal combustion engine having a baffle slidable longitudinally within the exhaust pipe at the upstream end a plug in the downstream end. The baffle and plug each have an opening for passage of exhaust gasses therethrough. The baffle defines a resonate chamber on ea
A tuneable exhaust pipe for an internal combustion engine having a baffle slidable longitudinally within the exhaust pipe at the upstream end a plug in the downstream end. The baffle and plug each have an opening for passage of exhaust gasses therethrough. The baffle defines a resonate chamber on each side of it. The chambers avoid turbulence and maintain the shock wave in the gasses so that the chambers cause an additive dynamic relationship calculated to cause a supercharging effect on the engine by increasing the internal pressures therein.
대표청구항
▼
1. Tuneable means for the exhaust system of a two-stroke cycle internal combustion engine, comprising a baffle slidable longitudinally within an exhaust pipe of said exhaust system; a plug insertable into the free, downsteam end of said exhaust pipe; and means for selectively positioning said baffle
1. Tuneable means for the exhaust system of a two-stroke cycle internal combustion engine, comprising a baffle slidable longitudinally within an exhaust pipe of said exhaust system; a plug insertable into the free, downsteam end of said exhaust pipe; and means for selectively positioning said baffle within said exhaust pipe to thereby define therein an upstream primary chamber and a downstream secondary chamber; said baffle having a wave-reflecting upstream side constituted by a concavity of substantially conical configuration, and being provided with at least one conduit therethrough communicating said primary chamber with said secondary chamber; said plug having a wave-reflecting upstream side constituted by a concavity of substantially conical configuration, and being provided with at least one conduit therethrough communicating said secondary chamber with atmosphere; and said baffle positioning means including an elongated rod, one end of which is affixed to the downstream side of said baffle and the other end of which is adapted to extend through a co-acting bore extending longitudinally through said plug, said plug being provided with means to immobilize said elongated rod in said bore to thereby immobilize said baffle at a selected location within said exhaust pipe. 2. Tuneable means as claimed in claim 1, wherein the apex of the substantially conical concavity of said baffle leads into a manifold chamber from which radiate a plurality of spaced passageways, each inclined towards said secondary chamber, which communicate said primary chamber with said secondary chamber; and wherein the apex of the substantially conical concavity of said plug leads into a chamber from which a passageway, inclined away from said secondary chamber, communicates said secondary chamber with atmosphere; said means to immobilize said elongated rod including a screw and locknut combination. 3. Tuneable means as claimed in claim 1, wherein the apex of the substantially conical concavity of said baffle leads into a manifold chamber from which radiate a plurality of spaced passageways, each inclined towards said secondary chamber, which communicate said primary chamber with said secondary chamber; and wherein a plurality of spaced, axially-oriented passageways lead off from the substantially conical concavity of said plug to thereby communicate said secondary chamber with atmosphere; said means to immobilize said elongated rod including external threads on the downstream end thereof and co-acting internal threads around the wall of the bore of said plug. 4. Tuneable means as claimed in claim 1, wherein the apex of the substantially conical concavity of said baffle communicates, via a central chamber, with the apex of a similar substantially conical concavity constituting a wave-reflecting downstream side of said baffle, said two substantially conical concavities, together with said central chamber, forming said communication conduit through said baffle; and wherein the apex of the substantially conical concavity of said plug leads into an axial passageway which communicates said secondary chamber with atmosphere; said elongated rod being positioned eccentrically with respect to the longitudinal axes of said baffle and plug, and the means to immobilize said rod including a screw and locknut combination. 5. Tuneable means for the exhaust system of a two-stroke cycle internal combustion engine, comprising a baffle slidable longitudinally within an exhaust pipe of said exhaust system; a plug insertable into the free, downstream end of said exhaust pipe; and means for selectively positioning said baffle within said exhaust pipe to thereby define therein an upstream primary chamber and a downstream secondary chamber; said baffle having a wave-reflecting upstream side constituted by a concavity of substantially conical configuration, having a conic angle of 30°, the apex of the concavity leading into a manifold chamber from which radiate a plurality of spaced passageways, each inclined towards said secondary chamber, which communicate said primary chamber with said secondary chamber, the combined cross-sectional area of the exhaust port of the engine's manifold; said plug having a wave-reflecting upstream side constituted by a concavity of substantially conical configuration, having a conic angle of 30°, the apex of the concavity leading into a chamber from which a passageway, inclined away from said secondary chamber, communicates said secondary chamber with atmosphere, the cross-sectional area of said passageway being 13% of the cross-sectional area of the exhaust port of the engine's manifold; and said baffle positioning means including an elongated rod, one end of which is inserted into the apex of a substantially conical boss forming the downstream side of said baffle and the other end of which is adapted to extend through a co-acting bore extending longitudinally through said plug; said plug being provided with screw and locknut combination means to immobilize said elongated rod in said bore to thereby immobilize said baffle at a selected location within said exhaust pipe, there being stop means on said rod to prevent said baffle from approaching said plug so closely as to inhibit exhaust discharge. 6. Tuneable means for the exhaust system of a two-stroke cycle internal combustion engine, comprising a baffle slidable longitudinally within an exhaust pipe of said exhaust system; a plug insertable into the free, downstream end of said exhaust pipe; and means for selectively positioning said baffle within said exhaust pipe to thereby define therein an upstream primary chamber and a downstream secondary chamber; said baffle having a wave-reflecting upstream side constituted by a concavity of substantially conical configuration, having a conic angle of 30°, the apex of the concavity leading into a manifold chamber from which radiate a plurality of spaced passageways, each inclined towards said secondary chamber, which communicate said primary chamber with said secondary chamber, the combined cross-sectional areas of said four passageways being 25% of the cross-sectional area of the exhaust port of the engine's manifold; said plug having a wave-reflecting upstream side constituted by a concavity of substantially conical configuration from which lead off a plurality of spaced, axially-oriented passageways to thereby communicate said secondary chamber with atmosphere; and said baffle positioning means including an elongated rod, one end of which is threaded so as to be screwable into the apex of a substantially conical boss forming the downstream side of said baffle and the other end of which is adapted to extend through a co-acting bore extending longitudinally through said plug; said plug being provided with internal threads around the wall of the bore of the plug to co-operate with external threads on the downstream end of said elongated rod, to thereby immobilize said rod in said bore and thus to immobilize said baffle at a selected location within said exhaust pipe.
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