Particulate filter trap load regeneration system
This patent describes an apparatus for determining when to regenerate a particulate filter trap used to collect particulates from an exhaust gas stream of an internal combustion engine. It comprises regenerative means operable in response to a control signal to regenerate the trap by causing the trapped particles to burn away; trap differential pressure sensing means for generating a trap differential pressure signal indicative of the fluid pressure drop in the exhaust gas stream as it passes through the particulate filter trap; flow rate sensing means located downstream of the particulate filter trap for generating a signal related to the volume flow rate of the exhaust gas stream downstream of the particulate filter trap; and control signal generating means connected with the trap differential pressure sensing means and with the flow rate sensing means for determining the mass loading of particulates within the particulate filter trap and for generating the control signal when the mass loading reaches a predetermined limit in a manner which is insensitive to exhaust gas leads upstream of the particulate filter.
- Assignee:
- Cummins Engine Co., Inc., Columbus, IN (United States)
- Patent Number(s):
- A; US 5063736
- Application Number:
- PPN: US 7-388675
- OSTI ID:
- 5935602
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330705* -- Emission Control-- Particulates
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR FILTERS
AIR POLLUTION CONTROL
CONTROL
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FILTERS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
PARTICLES
PARTICULATES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT