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

1990-08-31

1991-11-12

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

050637371

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 an exhaust pressure regulating valve disposed within the main branch 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. The exhaust pressure regulating valve is configured to act as a metering orifice when in a restrictive position so as to supply a metered amount of exhaust air to the burner while channeling a substantial portion of 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 a substantially constant flow of exhaust gas through the metering portion of the exhaust pressure regulating valve and into the burner assembly.

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

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