EP0433735A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Alarm device for the protection of catalytic converters for the exhaust gases of endothermic motors
Assignee: Fiat Auto SpA
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Filing: 1990-11-30
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Granted: —
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Expires: 2010-11-30
Abstract
Abstract An alarm device is described which can be installed in vehicles (1) equipped with a catalytic exhaust muffler (5), to protect the same from overheating due to an excess of unburnt substances in the exhaust gases; the device consists of a second catalytic converter (11) arranged upstream from the exhaust muffler (5) along the exhaust pipe (4), and provided on the inside with a temperature sensor (12); when the temperature of the second converter exceeds a predetermined threshold, this is signalled by the sensor, possibly to an engine control system (20).
Inventors
- 👤 Gianni Graffagno
- 👤 Enzo Dughera
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 11:42
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/08; F01; F01N; F01N11/00; F01N11/002; F01N13/00; F01N13/009; F01N2550/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
Alarm device for the protection from overheating of at least one primary catalytic converter mounted along an exhaust pipe of an internal combustion engine for conveying the exhaust gases of the engine, characterised in that it comprises at least one secondary catalytic converter installed in series along the said exhaust pipe of the engine upstream, in relation to the course of the exhaust gases, from the primary catalytic converter, and a temperature sensor supported by the said catalytic converter, and capable of detecting the internal temperature of the same.
Claim 2
Dependent Claim
28 words
Alarm device according to claim 1, characterised in that the said secondary catalytic converter exhibits dimensions much smaller than those of the primary catalytic converter to be protected.
Claim 3
Dependent Claim
26 words
Alarm device according to claim 2, characterised in that it comprises joints for the rapid connection/disconnection of the said secondary catalytic converter on the exhaust pipe.
Claim 4
Dependent Claim
44 words
Alarm device according to any of the preceding claims, characterised in that the said temperature sensor consists of a thermocouple connected to indicating means, and capable of causing the same to light up when a predetermined temperature is exceeded inside the secondary catalytic converter.
Claim 5
Dependent Claim
93 words
Vehicle equipped with an internal combustion engine provided with an exhaust manifold connected via an exhaust pipe to at least one primary catalytic capable of cleaning the exhaust gases produced by the said engine, characterised in that it comprises an alarm device according to any of the claims from 1 to 4, whose temperature sensor is connected to a control system of the engine, capable, when a predetermined temperature is exceeded inside the secondary catalytic converter, of varying the operating parameters of the engine so as to reduce the emission of unburnt substances.
Claim 6
Dependent Claim
18 words
Vehicle according to claim 5, characterised in that the said primary catalytic converter consists of a catalytic muffler.
References Cited (Backward Citations)
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