Exhaust system for an internal combustion engine, burn-off unit and methods therefor

Patent · Tue May 22 00:00:00 EDT 1984

OSTI ID:6142294

Frankenberg, A A; Scott, D R

An exhaust system is disclosed for an internal combustion engine which burns a hydrocarbon fuel mixture and which produces a carbonaceous particle carrying exhaust gas stream that passes through a filter of the system that retains at least part of the particles therein, the system having a burn-off unit for periodically burning the retained particles in the filter to tend to periodically clean the filter of the retained particles thereof. The burn-off unit is adapted to raise the temperature of the exhaust gas stream intermediate the engine and the filter to raise the temperature of the filter to particle burning temperature thereof, the burn-off unit injecting and burning a certain amount of the hydrocarbon fuel mixture in the exhaust gas stream intermediate the engine and the filter to raise the temperature of the exhaust gas stream intermediate the engine and the filter. The fuel mixture is injected into the exhaust gas stream by an aspirating unit of the burn-off unit, and the temperature of the exhaust gas stream is raised by an electrical heater and a catalyst bed in which the injected fuel mixture is to burn.

• Assignee: Robertshaw Controls Co.
• Patent Number(s): US 4449362
• OSTI ID: 6142294
• Resource Relation: Patent File Date: Filed date 2 Dec 1981; Other Information: PAT-APPL-326527
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
EXHAUST SYSTEMS
DESIGN
INTERNAL COMBUSTION ENGINES
CATALYSTS
COMBUSTION
EXHAUST GASES
FILTERS
FUEL INJECTION SYSTEMS
HYDROCARBONS
PARTICULATES
TEMPERATURE EFFECTS
THERMOELECTRIC HEATERS
CHEMICAL REACTIONS
DIRECT ENERGY CONVERTERS
ENGINES
FLUIDS
FUEL SYSTEMS
GASEOUS WASTES
GASES
HEAT ENGINES
HEATERS
ORGANIC COMPOUNDS
OXIDATION
PARTICLES
THERMOCHEMICAL PROCESSES
WASTES
330100* - Internal Combustion Engines
330700 - Advanced Propulsion Systems- Emission Control