Control system for diesel particulate trap regeneration system

Patent · Tue Sep 24 04:00:00 EDT 1991

OSTI ID:5741993

Stiglic, P M; Gabelman, B C; Hardy, J A

This patent describes a method of regenerating an exhaust gas particulate trap in an exhaust system for an internal combustion engine. It comprises measuring the air/fuel ratio of the internal combustion engine, generating a signal representing a commanded value of the air/fuel ratio signal corresponding to an air/fuel ratio with sufficient excess air to burn the particles stored in the trap, generating an error signal representing the difference between the measured air/fuel ratio and the commanded value of the air/fuel ratio, and controlling the air/fuel ratio of the engine as a function of the error signal, the exhaust system including a valve for regulating exhaust gas flow through the system to thereby vary the backpressure on the engine, the step of controlling the air/fuel ratio of the engine including the step of operating the backpressure valve in response to the error signal to thereby control the air/fuel ratio by controlling the back pressure on the engine.

• Assignee: Allied-Signal Inc., Morristown, NJ (United States)
• Patent Number(s): US 5050376; A
• Application Number: PPN: US 7-477019
• OSTI ID: 5741993
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102 -- Internal Combustion Engines-- Diesel
330705* -- Emission Control-- Particulates
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
CONTROL
CONTROL EQUIPMENT
DIESEL ENGINES
DIESEL FUELS
ENERGY SOURCES
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FILTERS
FLOW REGULATORS
FOSSIL FUELS
FUELS
GAS OILS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LIQUID FUELS
PARTICLES
PARTICULATES
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
VALVES