EP0104368A1
Expired / Lapsed
EP
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Injection system with stratified fuel charge
Assignee: Individual
•
Filing: 1983-08-03
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Granted: —
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Expires: 2003-08-03
Abstract
Abstract A high pressure fuel injection system having the capability to inject periodically one or more fuels, stratified before injection into nozzle, in a selected sequence, and in amounts controllable from cycle to cycle. The injection pump (6) operates with a fuel having high self-ignition ability. During consecutive injections the high pressure line (8) is connected to fuel tank (1) of the injection pump. A source of fuel (11) delivers a degraded fuel into nozzle (17) during consecutive injections. Another source of fuel (41), which delivers into nozzle the kind of fuel used by the injection pump, allows a selected stratification of the two fuels, or the formation of a blend of the two fuels. Each fuel source delivers the respective fuel at controllable pressure and temperature, in controllable amount, and with controllable timing. The fuel injection starts and ends with pilots of the fuel having high self-ignition ability. A pressure intensifier increases the injection pressure while allowing the fuel delivery into nozzle. Diesel engines provided with this injection system can operate with a large variety of fuels.
Inventors
- 👤 George Stan Baranescu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 09:55
CPC Classifications
F; F02; F02M; F02M43/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
286 words
A high pressure fuel injection system including an injection pump which operates with a fuel called further first fuel, said injection pump being connected with a nozzle by a high pressure line or by other means, said nozzle having the delivery channel closed between consecutive injections, said high pressure fuel injection system being characterized by the capability to inject periodically one or more fuels, stratified before injection into said nozzle in a selected sequence and in controllable amounts, this capability being achieved by several technical features, including an auxiliary source of first fuel, which delivers first fuel into said high pressure line through a one-way check valve, said high pressure fuel injection system including a connection between said high pressure line and the tank of first fuel, said connection being provided with means which open or close the connection at selected moments, said nozzle including a low pressure channel provided with a one-way check valve and connected to said high pressure channel, said high pressure fuel injection system including also a source of a second fuel, which delivers said second fuel into said high pressure channel through said low pressure channel of said nozzle, the delivery of said second fuel into said high pressure channel being achieved at controllable pressure and temperature, in controllable amount, and with controllable timing, said nozzle allowing the stratification between first fuel of the second fuel delivered into said high pressure channel, and preventing the mixing between the two fuels into said nozzle during their stratification, as well as during their injection, said high pressure fuel injection system including also means which connect the drain of said nozzle to the tank of first fuel, or to the tank of second fuel.
Claim 2
Dependent Claim
286 words
A high pressure fuel injection system including an injection pump which operates with a fuel called further first fuel, said injection pump being connected with a nozzle by a high pressure line or by other means, said nozzle having the delivery channel closed between consecutive injections, said high pressure fuel injection system being characterized by the capability to inject periodically one or more fuels, stratified before injection into said nozzle in a selected sequence and in controllable amounts, this capability being achieved by several technical features, including an auxiliary source of first fuel, which delivers first fuel into said high pressure line through a one-way check valve, said high pressure fuel injection system including a connection between said high pressure line and the tank of first fuel, said connection being provided with means which open or close the connection at selected moments, said nozzle including a low pressure channel provided with a one-way check valve and connected to said high pressure channel, said high pressure fuel injection system including also a source of a second fuel, which delivers said second fuel into said high pressure channel through said low pressure channel of said nozzle, the delivery of said second fuel into said high pressure channel being achieved at controllable pressure and temperature, in controllable amount, and with controllable timing, said nozzle allowing the stratification between first fuel of the second fuel delivered into said high pressure channel, and preventing the mixing between the two fuels into said nozzle during their stratification, as well as during their injection, said high pressure fuel injection system including also means which connect the drain of said nozzle to the tank of first fuel, or to the tank of second fuel.
Claim 3
Dependent Claim
53 words
A high pressure fuel injection system as defined in Claim 1, wherein said nozzle pressure chamber is delimited by the nozzle needle conical tip, by the nozzle needle seat, and by the nozzle body, said high pressure chamber being connected to said nozzle pressure chamber through a channel located in said nozzle needle.
Claim 4
Dependent Claim
35 words
A high pressure fuel injection system as defined in Claim 1, wherein said nozzle is of conventional type, said source of second fuel being connected to said high pressure line through a one-way check valve.
Claim 5
Dependent Claim
98 words
A high pressure fuel injection system as defined in Claims 1 or 2, wherein said nozzle includes a second low pressure channel provided with a one-way check valve and connected to said high pressure channel directly or through a second channel located in said nozzle needle, further including a principal source of first fuel which delivers said first fuel into said high pressure channel through said second low pressure channel of said nozzle, the delivery of said first fuel into said high pressure channel being achieved at controllable pressure and temperature, in controllable amount, and with controllable timing.
Claim 6
Dependent Claim
63 words
A high pressure fuel injection system as defined in Claim 4, wherein said nozzle is of conventional type, said principal source of first fuel and said source of second fuel being connected to said high pressure line through their own one-way check valve, said connection being achieved so that the two fuels mix with each other before entering into said high pressure line.
Claim 7
Dependent Claim
41 words
A high pressure fuel injection system as defined in any of the Claims 1 to 5, wherein said injection pumps is of individual or in-line type, said high pressure line being in open connection with the barrel of said injection pump.
Claim 8
Dependent Claim
94 words
A high pressure fuel injection system as defined in any of the Claims 1 to 5, wherein said high pressure pump is of separate rotary distributor type, said rotary distributor being provided with a groove which is in open connection with said tank of first fuel, also in connection with the high pressure lines through channels, the port of each channel connected to said groove of said rotary distributor being closed by a nose of said groove, when said injection pump delivers first fuel into the high pressure line connected to the corresponding channel.
Claim 9
Dependent Claim
90 words
A high pressure fuel injection system as defined in any of Claims 1 to 5, wherein said injection pump is of plunger - distributor type, said plunger being provided with a groove which is in open connection with said tank of first fuel, also in connection with the high pressure lines through channels, the port of each channel connected to said groove of the plunger being closed by a nose of said groove, when said injection pump delivers first fuel into the high pressure line connected to the corresponding channel.
Claim 10
Dependent Claim
123 words
A high pressure fuel injection system as defined in any of the Claims 1 to 8, further including a pressure intensifier located on said high pressure line, the large barrel of said pressure intensifier being in open connection with said high pressure line, also in connection with said auxiliary source of first fuel through a one-way check valve, further the small barrel of said pressure intensifier being in open connection with said high pressure channel of said nozzle, said small barrel of said pressure intensifier being also connected with said auxiliary source of first fuel through a one way check valve, as well as with the drain of first fuel through a channel closed and opened by the plunger of said small barrel.
Claim 11
Dependent Claim
36 words
A high pressure fuel injection system as defined in any of the Claims 1 to 9, wherein the control of sources which deliver fuel into said nozzle or into said high pressure line is electronically programmed.
References Cited (Backward Citations)
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