Exhaust gas particle burning method and apparatus for an internal combustion engine

Patent · Tue Jan 10 04:00:00 EST 1984

OSTI ID:6511771

Tokura, N

An exhaust gas particle burning-away method is disclosed for an internal combustion engine in which a burner is operated for a predetermined period of time the first time the engine idles after the detected exhaust gas pressure on the upstream side of a filter has exceeded a stored reference exhaust gas pressure predetermined according to the detected engine speed and engine load. The apparatus according to the present invention comprises a memory unit, a comparator, an output unit including an idle switch and a timer, and various sensors such as an engine speed sensor, an engine load sensor, etc., in addition to a burner with a glow plug and a heater, and an exhaust gas filter. A control unit retrieves reference pressure values according to currently-detected engine speed and load, and compares the reference value to the current detected exhaust gas pressure. The output unit outputs a command signal for a predetermined length of time when the detected pressure exceeds the reference pressure and the engine is idling. The command signal causes a fuel pump for the burner and a glow plug for the burner both to operate. The predetermined length of time is sufficient to burn away the accumulated exhaust gas particles.

• Assignee: Nissan Motor Co., Ltd. (Japan)
• Patent Number(s): US 4424671
• OSTI ID: 6511771
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AFTERBURNERS
AIR POLLUTION CONTROL
BURNERS
CHEMICAL REACTIONS
COMBUSTION
COMPARATOR CIRCUITS
CONTROL
DESIGN
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
EXHAUST GASES
FILTERS
FILTRATION
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OXIDATION
PARTICLES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SEPARATION PROCESSES
SIGNALS
SWITCHES
THERMOCHEMICAL PROCESSES
WASTES