EP0207446A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for regeneration of a particulate filter in diesel engine
Assignee: Isuzu Motors Ltd
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Filing: 1986-06-26
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Granted: —
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Expires: 2006-06-26
Abstract
Abstract An emissions filter regeneration system includes a particulate matter filter (2) having an inlet connected by an exhaust pipe (1) to an exhaust manifold of an engine, a pressure sensor (4) disposed to sense the pressure at the inlet of the filter (2), a combustion chamber (17) having an outlet opening disposed to discharge gases into the inlet, a fuel supply means (13,15) for introducing fuel into the combustion chamber (17), an air supply means (7) for introducing air into the combustion chamber (17), and an igniter (11) for igniting a fuel and air mixture in the combustion chamber (17). Also included is a control means (12) for activating the fuel supply means (13,15), the air supply means (7), and the igniter (11) in response to sensing by the pressure sensor (4) of a pressure above a predetermined value.
Inventors
- 👤 Hideo C/O Isuzu Motors Ltd. Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 04:17
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/023; F01N3/025; F01N3/0253; F01N3/0256; F01N2390/00; F01N2390/02; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
128 words
An imissions filter regeneration system comprising: a particulate matter filter (2) having an inlet connected by an exhaust pipe to an exhaust manifold of an engine; a pressure sensor (4) disposed to sense the pressure at said inlet of said filter; a combustion chamber (17) having an outlet opening disposed to discharge gases into said inlet; fuel supply means for introducing fuel into said combustion chamber; air supply means (7) for introducing air into said combustion chamber; ignition means (11) for igniting a fuel and air mixture in said combustion chamber (17); and control means (12) for activating said fuel supply means, said air supply means, and said ignition means in response to sensing by said pressure sensor of a pressure at said inlet above a predetermined value.
Claim 2
Dependent Claim
128 words
An imissions filter regeneration system comprising: a particulate matter filter (2) having an inlet connected by an exhaust pipe to an exhaust manifold of an engine; a pressure sensor (4) disposed to sense the pressure at said inlet of said filter; a combustion chamber (17) having an outlet opening disposed to discharge gases into said inlet; fuel supply means for introducing fuel into said combustion chamber; air supply means (7) for introducing air into said combustion chamber; ignition means (11) for igniting a fuel and air mixture in said combustion chamber (17); and control means (12) for activating said fuel supply means, said air supply means, and said ignition means in response to sensing by said pressure sensor of a pressure at said inlet above a predetermined value.
Claim 3
Dependent Claim
45 words
A system according to claim 1 including a temperature sensor (30) disposed to sense the temperature of said discharged gases and wherein said control means (11) deactivates said ignition means in response to sensing by said temperature sensor (30) of temperatures above a given value.
Claim 4
Independent Claim
33 words
A system according to one of the claims 1 or 2, including fuel vaporization means (8) disposed in said combustion chamber so as to vaporize fuel injected thereinto by said fuel supply means.
Claim 5
Dependent Claim
16 words
A system according to claim 3 wherein said fuel vaporization means (8) comprises electrical heating means.
Claim 6
Dependent Claim
20 words
A system according to claim 3 or 4, wherein said fuel vaporization means (8) further comprises a flow distribution means.
Claim 7
Independent Claim
34 words
A system according to one of the claims 1 to 5, wherein said ignition means (11) comprises an ignition plug, said air supply means comprises a blower, and said control means comprises a computer.
Claim 8
Independent Claim
59 words
A system according to one of the claims 1 to 6, wherein said combustion chamber (17) is disposed in said exhaust pipe (1), and said air supply means (7) comprises an air chamber (5) for supplying air to said combustion chamber and disposed in said exhaust pipe so as to produce heating of said air by exhaust gases therein.
Claim 9
Independent Claim
32 words
A system according to one of the claims 1 to 7, wherein said combustion chamber (17) comprises a cylindrical portion, and said air chamber is an annular chamber surrounding said cylindrical portion.
Claim 10
Dependent Claim
81 words
An imissions filter regeneration system with a particulate matter filter (2) in an exhaust system (1) of an engine, especially of a diesel engine, and combustion means discharging into said system, characterized by pressure sensor means (4), further in that said means (4) are disposed to sense the pressure at an inlet of the filter (2) and that the combustion is controlable by said pressure sensor means (4) such that combustion only occurs when the pressure is above a predetermined level.
Claim 11
Dependent Claim
81 words
An imissions filter regeneration system with a particulate matter filter (2) in an exhaust system (1) of an engine, especially of a diesel engine, and combustion means discharging into said system, characterized by pressure sensor means (4), further in that said means (4) are disposed to sense the pressure at an inlet of the filter (2) and that the combustion is controlable by said pressure sensor means (4) such that combustion only occurs when the pressure is above a predetermined level.
Claim 12
Dependent Claim
37 words
Method to operate a particulate matter filter having an imission filter regeneration system, characterized in that the regeneration system is operated only when the pressure level at an inlet of the filter exceeds a predetermined pressure level.
Claim 13
Dependent Claim
37 words
Method to operate a particulate matter filter having an imission filter regeneration system, characterized in that the regeneration system is operated only when the pressure level at an inlet of the filter exceeds a predetermined pressure level.
References Cited (Backward Citations)
FR2396163A1
Cited
US4404795A
Cited
US4424671A
Cited
EP0114696A2
Cited
GB2134408A
Cited
US4589254A
Cited
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