Gm Global Technolgoy Operations, Inc.

Electro-motive Diesel, Inc.

Raj P Ranganathan

Robert D Straub

Sherif Hussein El Tahry

Edward John Cryer

Brent T Deep

Sandro R Balestrino

Henry W Harper

Xiaobin (Sharon) Li

Bala K Murthy

Thomas Stewart

Anthony F Grzelakowski

A diffuser for aiding in the vaporization and mixing of an injected reactant with the exhaust gas feed stream of an exhaust gas aftertreatment system is disclosed. The diffuser is disposed within an exhaust gas conduit of the exhaust gas aftertreatment system and has an impingement surface and a baffle plate disposed downstream of and adjacent thereto. The baffle plate extends outwardly from the diffuser, to terminate at a baffle plate tip that is located intermediate of the diffuser and an inner wall of the exhaust gas conduit. The baffle plate is operable to trap a portion of an exhaust gas feed stream, and a reactant resident therein, to increase the vaporization and residence time of the reactant in the exhaust gas feed stream.

Nozzle diffuser mixer

Exemplary embodiments of the present invention are directed towards an apparatus and method for control of fluid flow through a conduit of an exhaust system for an engine, particularly prior to an exhaust treatment device. In one embodiment, a fluid flow control device for receiving and guiding exhaust gas from an engine towards an exhaust gas treatment device is provided. The fluid flow control device includes a nozzle disposed within an exhaust conduit of the engine. The nozzle includes an inlet opening and an outlet opening for forming a first flow path through the nozzle. The nozzle is spaced from the exhaust conduit for forming a second flow path between the nozzle and the exhaust conduit. The fluid flow control device also includes an injector disposed adjacent the nozzle. The injector may be oriented to direct a pressurized fluid to the first or second flow path.

An engine assembly may include an engine defining a cylinder bore, a fuel tank, a fuel supply assembly in fluid communication with the fuel tank and the cylinder bore, a fuel return assembly in fluid communication with the fuel supply assembly and the fuel tank, and a fuel filter assembly. The fuel filter assembly may include a filter casing having an inlet, an outlet and a bypass opening, and a filter media located within the filter casing. The filter media may be located between the inlet and the outlet, defining a dirty fuel region of the filter assembly between the inlet and the filter media and a clean fuel region between the filter media and the filter outlet. The bypass opening may be in fluid communication with the dirty fuel region and the fuel return assembly to draw gases out of the dirty fuel region.

Engine assembly with fuel filter gas removal apparatus

A fluid entrainment apparatus is provided which operates to mix a first fluid stream with a second fluid stream. The apparatus includes first and second fluid flow conduits. The first fluid flow conduit includes a nozzle portion having a converging bore through which the first fluid is accelerated. Additionally, the second fluid flow conduit includes a nozzle portion having a converging bore, a duct portion having a generally cylindrical bore, and a diffuser portion having a diverging bore. The nozzle portion of the second fluid flow conduit is mounted with respect to the nozzle portion of the first fluid flow conduit such that an annular port is formed through which the second fluid passes to mix with the first fluid. Additional fluid mixing occurs in the duct portion and the diffuser portion. The fluid entrainment apparatus may be configured for use within a vehicle exhaust system.

Fluid entrainment apparatus

An engine cooling system includes a centrifugal coolant pump and a cavitation suppressor in the system upstream of the pump inlet. The suppressor increases pressure in the pump inlet by a converging nozzle that accelerates a jet of coolant at the location of the static head and converting kinetic energy of the jet to increased pressure in a diffuser. In an exemplary embodiment, the suppressor is formed of simple components made from available materials and preferably welded into an assembly. A machined nozzle with a diffuser and head pipe made from available steel pipe comprise the main components of the exemplary cavitation suppressor.

Growing community of inventors

Rochester Hills, MI, United States of America

Raj P Ranganathan