Patent EP0080327A2 successfully refreshed from Google Patents.
EP0080327A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Engine installation having exhaust gas recirculation system
Assignee: Dresser Industries Inc
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Filing: 1982-11-17
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Granted: —
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Expires: 2002-11-17
Abstract
Abstract A stationary engine installation comprises a gas engine (10) having a carburetor (12) and an exhaust pipe (18) supplying exhaust gas to a turbocharger (22). Combustion air is supplied to the carburetor via an air conduit (30), cooler (32), conduit (36), orifice (38) and venturi (40). An air supply conduit (50) incorporating a normally closed valve (54) connects the air conduit (30) to the exhaust pipe (18) whilst an exhaust conduit (42, 48) incorporating a cooler (44) and a normally closed valve (52) connects the exhaust pipe (18) to the venturi to recirculate exhaust gas from the exhaust pipe to the carburetor. The normally closed valves (52, 54) are opened when pressure in air conduit (36) exceeds a predetermined value so that the valves (52, 54) are both closed during start-up and idle conditions. When opened the valves (52, 54) allow recirculation of exhaust gases to reduce nitrogen oxides in the finally exhausted gas without the use of pumps or blowers.
Inventors
- 👤 Robert Walter Stachowicz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 12:09
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/12; F02B37/16; F02D; F02D21/00; F02D21/06; F02D21/08; F02M; F02M26/00; F02M26/02; F02M26/04; F02M26/05; F02M26/13; F02M26/17; F02M26/19; F02M26/22; F02M26/23; F02M26/28; F02M26/09; F02M26/10; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
194 words
A turbocharged engine installation comprising: an engine; an exhaust gas pipe leading from the engine; an exhaust gas driven turbocharger connected to the exhaust gas pipe; a fuel supply for supplying fuel to the engine; and an air supply conduit for supplying combustion air from the turbocharger to the engine characterised in that an exhaust conduit (42,48) is connected to the exhaust pipe between the engine (10) and the turbocharger (22); a venturi device (40) is connected with the exhaust conduit (42,48) and with the air supply conduit (30,36); a second air conduit (50) connects the first air conduit (30,36) and the exhaust pipe (18) for increasing the pressure in the exhaust pipe (18); a first valve (52) is located in said exhaust conduit (42,48) for controlling the flow of exhaust gas therethrough; a second valve (54) is located in the second air conduit (50) for controlling the flow of air therethrough; and, a valve control device (56,58,60) is connected with both the valves (52,54) for opening said valves (52,54) when the engine (10) is operating under predetermined conditions and permitting said valves (52,54) to close during starting and idling of the engine (10).
Claim 2
Dependent Claim
194 words
A turbocharged engine installation comprising: an engine; an exhaust gas pipe leading from the engine; an exhaust gas driven turbocharger connected to the exhaust gas pipe; a fuel supply for supplying fuel to the engine; and an air supply conduit for supplying combustion air from the turbocharger to the engine characterised in that an exhaust conduit (42,48) is connected to the exhaust pipe between the engine (10) and the turbocharger (22); a venturi device (40) is connected with the exhaust conduit (42,48) and with the air supply conduit (30,36); a second air conduit (50) connects the first air conduit (30,36) and the exhaust pipe (18) for increasing the pressure in the exhaust pipe (18); a first valve (52) is located in said exhaust conduit (42,48) for controlling the flow of exhaust gas therethrough; a second valve (54) is located in the second air conduit (50) for controlling the flow of air therethrough; and, a valve control device (56,58,60) is connected with both the valves (52,54) for opening said valves (52,54) when the engine (10) is operating under predetermined conditions and permitting said valves (52,54) to close during starting and idling of the engine (10).
Claim 3
Dependent Claim
34 words
A turbocharger engine installation according to claim 1 characterised in that an exhaust gas heat exchanger (44) is located in the exhaust conduit (42,48) for cooling exhaust gas passing through the exhaust conduit (42,48).
Claim 4
Dependent Claim
37 words
A turbocharger engine installation according to claim 1 or claim 2 characterised in that an air heat exchanger (32) is located in the first air conduit (30,36) for cooling air passing through the first air conduit (30,36).
Claim 5
Dependent Claim
35 words
A turbocharger engine installation according to claim 3 characterised in that the air heat exchanger (32) is located between the venturi device (40) and the connection between said first (30) and second (50) air conduits.
Claim 6
Dependent Claim
33 words
A turbocharger engine installation according to claim 3 characterised in that the air heat.exchanger (32) is located between the turbocharger (22) and the connection between said first (30) and second (50') air conduits.
Claim 7
Dependent Claim
74 words
A turbocharger engine installation according to any preceding claim characterised in that the valve control device includes: a pressure sensor (6) for sensing the pressure in the first air conduit (30,36); and valve actuators (56,58) actuated by the pressure sensor (60) when the pressure in the first air conduit (30,36) reaches a pre-determined value for opening both said valves (52,54) to permit flow through said exhaust conduit (42,48) and said second air conduit (50).
Claim 8
Dependent Claim
36 words
A turbocharger engine installation according to claim 6, characterised in that both said valves (52,54) are biased toward the closed position preventing flow through said conduit (42,48 and 50) when unactuated by said valve actuators (56,58).
Claim 9
Dependent Claim
155 words
A turbocharger engine installation according to any preceding claim characterised in that a third air conduit (62,64) connects the first air conduit (30,36) with the exhaust (24) from the turbocharger (24); a differential pressure responsive valve (60) is located in the third air conduit (62,64) for controlling the flow of air from the first air conduit (30,36) to the turbocharger exhaust (24); an air pressure sensor (68) is provided for transmitting the pressure in the first air conduit (30,36) to the differential pressure responsive valve (60); and an exhaust pressure sensor (66) is provided for transmitting the pressure in the exhaust gas pipe (18) to the differential pressure responsive valve (60), whereby the differential pressure responsive valve (60) opens to permit air flow from the first air conduit (30,36) to the turbocharger exhaust (24) when the differential in pressure between the first air conduit (30,36) and the exhaust gas pipe (18) exceeds a predetermined value.
Claim 10
Dependent Claim
56 words
A turbocharger engine installation according to any preceding claim characterised in that the engine (10) is a stationary gas engine, and including a carburetor (12) for receiving air and recirculated exhaust gas from the outlet of the venturi device (40) and mixing the received air and exhaust gas with gaseous fuel for supply to the engine.
Claim 11
Dependent Claim
30 words
A turbocharger engine installation according to any preceding claim characterised in that a flow restricting orifice (38) is located in the first air conduit (30,36) upstream of the venturi device.
References Cited (Backward Citations)
No citation records indexed.
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