US 2006/0131870 A1Published application

Exhaust pulse control unit and method

OwnerGraham Bush, Jason Kolkinventors

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Abstract

An exhaust pulse control unit and related method comprise an inlet tube communicating with incoming exhaust gas, an outlet tube communicating with exiting exhaust gas, and a housing extending between and connected with the inlet tube and outlet tube at opposite ends thereof. At least one pulse capture and expansion zone is disposed between the inlet tube and an intermediate zone portion of the housing, and is configured to increase exhaust manifold vacuum in an associated internal combustion engine. A first connector flange, having an attachment portion and central aperture, is connected with an inlet end of the housing. A second connector flange, having an attachment portion aligned with the attachment portion of the first flange and a central aperture, is connected with the inlet tube. The central aperture of the second flange has a beveled surface formed integrally therein to define a nozzle which forms the pulse capture and expansion zone. A fastener detachably, yet securely, connects the attachment portions of the first and second flanges to form an airtight seal between the inlet tube and the housing.

Claims31

Dependent claims

An exhaust pulse control unit for internal combustion engines, comprising:

an inlet tube configured for communication with incoming exhaust gas;
an outlet tube configured for communication with exiting exhaust gas;
a housing extending between and operably connected with said inlet tube and said outlet tube adjacent opposite ends thereof;
an intermediate zone disposed along a medial portion of said housing;
at least one pulse capture and expansion zone disposed between said inlet tube and said intermediate zone of said housing, and configured to increase exhaust manifold vacuum in an associated internal combustion engine;
a first connector flange having a radially outwardly extending attachment portion, and a central aperture therethrough which is axially aligned with said housing;
said first connector flange being operably connected with said housing;
a second connector flange having a radially outwardly extending attachment portion which is axially aligned with said attachment portion of said first connector flange, and a central aperture therethrough which is axially aligned with said inlet tube, and includes an inlet portion and an oppositely disposed outlet portion;
said second connector flange being operably connected with said inlet tube adjacent said inlet portion thereof;
said outlet portion of said central aperture of said second connector flange having a beveled surface formed integrally therein to define a nozzle which forms said pulse capture and expansion zone;
and
a fastener detachably, yet securely, connecting said attachment portion of said first connector flange with said attachment portion of said second connector flange to form an airtight seal between said inlet tube and said housing.

9 more elements

A method for making an exhaust pulse control unit for internal combustion engines, comprising:

forming an inlet tube into a shape configured for communication with incoming exhaust gas;
forming an outlet tube into a shape configured for communication with exiting exhaust gas;
forming a housing shaped to extend between the inlet tube and the outlet tube;
operably connecting the inlet tube to one end of the housing and the outlet tube to the opposite end of the housing;
forming an intermediate zone along a medial portion of the housing;
forming a first connector flange having a radially outwardly extending attachment portion, and a central aperture therethrough;
axially aligning the central aperture of the first connector flange with the housing;
operably connecting the first connector flange with the housing;
forming a second connector flange having a radially outwardly extending attachment portion, and a central aperture therethrough which includes an inlet portion and an oppositely disposed outlet portion;
axially aligning the central aperture of the second connector flange with the inlet tube, such that the attachment portions of the first and second connector flanges are axially aligned;
operably connecting the second connector flange with the inlet tube adjacent the inlet portion thereof;
integrally forming at least one beveled surface in the outlet portion of the central aperture of the second connector flange to define a nozzle which forms at least one pulse capture and expansion zone configured to increase exhaust manifold vacuum in an associated internal combustion engine;
and
detachably, yet securely, fastening the attachment portion of the first connector flange with the attachment portion of the second connector flange to form an airtight seal between the inlet tube and the housing.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/313,840Filed 20 Dec 2005
Priority: 22 Dec 2004
Published: 22 Jun 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F01N 13/1855
Mechanical joints: the connection being realised by using bolts, screws, rivets or the like
F01N 1/00
Silencing apparatus characterised by method of silencing
F01N 13/1805
Construction facilitating manufacture, assembly, or disassembly: fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine…
F01N 2470/00
Structure or shape of exhaust gas passages, pipes or tubes