Particulate trap system for an internal combustion engine

Details Particulate trap system for an internal combustion engine Particulate trap system for an internal combustion engine

1989-10-27

1991-01-29

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60288, 60303, F01N 302

Patent

active

049877380

ABSTRACT:
A particulate trap system for use in the exhaust system of an internal combustion engine has an exhaust conduit with a main branch, a bypass branch, and a diverter valve disposed therebetween for selectively diverting exhaust gas through one of the branches. A particulate filter is disposed within the main branch, and a burner assembly having an outlet disposed upstream of the filter is operable to raise the temperature of the filter to a level sufficient to incinerate particulates thereon. A burner supply conduit extending between the exhaust conduit and the burner, having a metering orifice disposed therein, supplies exhaust air to the burner when the diverter valve closes the main branch and channels the exhaust flow through the bypass branch during the regeneration cycle of the system. A pressure relief valve disposed within the bypass branch maintains substantially constant pressure within the exhaust conduit thereby assuring substantially constant flow of exhaust gas through the metering orifice and into the burner assembly.

REFERENCES:
patent: 4381643 (1983-05-01), Stark
patent: 4383411 (1983-05-01), Riddel
patent: 4419113 (1983-12-01), Smith
patent: 4481767 (1984-11-01), Stark
patent: 4502278 (1985-03-01), Stark
patent: 4503672 (1985-03-01), Stark et al.
patent: 4558565 (1985-12-01), Kojima et al.
patent: 4677823 (1987-07-01), Hardy
patent: 4686827 (1987-08-01), Wade et al.

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