Regenerator for diesel particulate filter

Patent · Tue May 20 04:00:00 EDT 1986

OSTI ID:5634992

Kume, S; Yoshida, M; Konno, Y; Kume, T; Takada, H; Shinsei, K; Matsumoto, A; Ogawa, H

A filter regenerating apparatus is described comprising a particulate filter provided in an exhaust gas line from a diesel engine for trapping particulates in exhaust gas from the engine, an exhaust bypass for bypassing the particulate filter, and a burner provided upstream of the particulate filter receiving fuel and air, the exhaust gas being passed through the bypass while the particulates, when trapped in the filter in an amount exceeding a present level, are burnt in the burner, the improvement wherein the apparatus further comprises a line for supplying air into the burner through an air supply unit, a flow control valve provided in the air supply line for regulating a cross-sectional area of the line, a flow control unit for positioning the flow control valve depending upon at least one of a temperature and pressure of air in the supply line, a relief valve provided in the supply line for releasing part of the air in the line to the atmosphere, a relief valve control unit for positioning the relief valve depending upon a difference between a pressure in the supply line at a point upstream of the flow control valve and a pressure at a point downstream thereof, and a combustion control unit for establishing a timing of filter regeneration, thereby causing the exhaust gas to flow into the bypass and actuating the burner.

• Assignee: Mitsubishi Denki Kabushika Kaisha
• Patent Number(s): US 4589254
• OSTI ID: 5634992
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
330705 -- Emission Control-- Particulates
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR FLOW
AIR POLLUTION ABATEMENT
BURNERS
COMBUSTION CONTROL
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
DIESEL ENGINES
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST SYSTEMS
FILTERS
FILTRATION
FLOW REGULATORS
FLUID FLOW
FLUIDS
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
PARTICLES
PARTICULATES
POLLUTION ABATEMENT
POSITIONING
PRESSURE DEPENDENCE
REGENERATION
REGENERATORS
RELIEF VALVES
SEPARATION PROCESSES
TEMPERATURE DEPENDENCE
TIMING PROPERTIES
VALVES
WASTES