EP0071588A2
Expired / Lapsed
EP
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An apparatus for forming a mixture of air and gaseous fuel, and for checking and regulating the air-fuel ratio of the said mixture
Assignee: Emerson Process Management SRL
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Filing: 1982-07-28
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Granted: —
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Expires: 2002-07-28
Abstract
Abstract The apparatus comprises a pipe 4 and a duct 9, both of which terminate at a channel 20 in communication with the Induction manifold of an internal combustion engine. Gaseous fuel V passes through the pipe 4 and air F through the duct 9. A constant check on the flow rate of the said fluids is made by electrical devices 6a-6b and 10a-10b wired to an electronic logic group 15. Placed in series with the said pipe 4, upstream of the devices 6a-6b that measure the flow rate of the fuel, there is an electrovalve 5 integral with the armature 5b of a solenoid Ba. Between the limit closing configuration C and the limit opening configuration A, the electrovalve 5 adopts a plurality of working configurations L whereby the delivery value of the gaseous fuel V passing through the port S of the aforementioned electrovalve can be varied. The solenoid 5a is energized by the aforementioned electronic logic group 15 by means of variable frequency unidirectional impulses in such a way as to obtain an equivalence between the true mixing ratio and that programmed by the said group.
Inventors
- 👤 Aleardo Tartarini
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 20:09
CPC Classifications
F; F02; F02D; F02D19/00; F02D19/02; F02D19/021; F02D19/023; F02D19/026; F02D19/027; F02M; F02M21/00; F02M21/02; F02M21/0218; F02M21/023; F02M21/0233; F02M21/0203; F02M21/0209; F02M21/0212; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
306 words
in apparatus for forming a mixture of air and gaseous fuel, and for checking and regulating the air-fuel ratio of the said mixture, of the type taht is connected to a source of supply of the said gaseous fuel and to an internal combustion engine supplied with the said mixture via a channel in which is created a vacuum consequential to the operation of means for regulating the speed of the driving shaft of the said engine, characterized by the fact that it comprises : at least one pipe 4 that links the aforementioned source 2 to the said channel 20; an electrovalve 5 placed along the said pipe 4 and able to adopt, between the limit closing configuration C and the limit opening configuration A, a plurality of working configurations L; first electrical devices 6a-6b for measuring the flow rate of the gaseous fuel V passing through the said pipe 4, positioned along the latter downstream with respect to the said electrovalve 5; at least one duct 9 for the supply of air F terminating at the said channel 20; second electrical devices 10a-10b for measuring the flow rate of the air F passing through the duct 9; and an electronic logic group 15, connected electrically to the said first electrical devices 6a-6b and to the said second electrical devices 10a-10b, suitable for measuring the flow rate of the air and of the gaseous fuel and for processing the said readings in a functional relationship with values programmed for the air-gaseous fuel mixing ratio; the said group 15 being destined to energize the solenoid 5a of the electrovalve 5 by means of variable frequency unidirectional impulses in order to obtain uniformity between the true mixing ratio of the mixture passing through the said channel 20 and the mixing ratio programmed with the said group 15.
Claim 2
Dependent Claim
306 words
in apparatus for forming a mixture of air and gaseous fuel, and for checking and regulating the air-fuel ratio of the said mixture, of the type taht is connected to a source of supply of the said gaseous fuel and to an internal combustion engine supplied with the said mixture via a channel in which is created a vacuum consequential to the operation of means for regulating the speed of the driving shaft of the said engine, characterized by the fact that it comprises : at least one pipe 4 that links the aforementioned source 2 to the said channel 20; an electrovalve 5 placed along the said pipe 4 and able to adopt, between the limit closing configuration C and the limit opening configuration A, a plurality of working configurations L; first electrical devices 6a-6b for measuring the flow rate of the gaseous fuel V passing through the said pipe 4, positioned along the latter downstream with respect to the said electrovalve 5; at least one duct 9 for the supply of air F terminating at the said channel 20; second electrical devices 10a-10b for measuring the flow rate of the air F passing through the duct 9; and an electronic logic group 15, connected electrically to the said first electrical devices 6a-6b and to the said second electrical devices 10a-10b, suitable for measuring the flow rate of the air and of the gaseous fuel and for processing the said readings in a functional relationship with values programmed for the air-gaseous fuel mixing ratio; the said group 15 being destined to energize the solenoid 5a of the electrovalve 5 by means of variable frequency unidirectional impulses in order to obtain uniformity between the true mixing ratio of the mixture passing through the said channel 20 and the mixing ratio programmed with the said group 15.
Claim 3
Independent Claim
81 words
An apparatus according to the preceding claim, wherein provision is made for third electrical devices 13 for measuring the speed at which the driving shaft of the internal combustion engine rotates, connected electrically to the said electronic logic group 15, the latter energizing the said solenoid 5a by means of variable frequency unidirectional impulses in order to obtain a pre-established functional relationship between the mixing ratio and the number of revolutions of the driving shaft of the said internal combustion engine.
References Cited (Backward Citations)
No citation records indexed.
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