US3753424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for supplying gaseous and liquid fuels to a dual-fuel engine
Assignee: Steyr Daimler Puch AG
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Filing: 1971-11-12
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Granted: 1973-08-21
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Expires: 1991-11-12
Abstract
Abstract Only liquid fuel is supplied to the engine under a no-load condition. Only liquid fuel at an increasing rate is supplied to said engine as the load thereon increases from said no-load condition through a lower partial load range. Liquid and gaseous fuels are supplied to said engine in a higher partial load range and under full load. The proportion of said gaseous fuel relative to said liquid fuel is increased during an increase of the load on said engine above said lower partial load range to about three-fourths of the full load on the engine.
Inventors
- 👤 D Haidvogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:58
CPC Classifications
F; F02; F02D; F02D19/00; F02D19/06; F02D19/0663; F02D19/0684; F02D19/0602; F02D19/0607; F02D19/0673; F02D19/0678; F02D19/08; F02D19/081; F02D19/10; F02D19/105; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
137 words
A method of controlling the supply of a normally gaseous and a normally liquid fuel to a dual-fuel engine for vehicles after it has been started, which comprises the steps of 1. supplying only the liquid fuel to the engine under a no-load condition; 2. continuing to supply the liquid fuel to the engine at an increasing rate as the engine load increases from the no-load condition to a full engine load, a. only the liquid fuel being supplied during a first, low load range; 3. also supplying the gaseous fuel to the engine at an increasing rate during a second, higher load range above the first load range and up to about three-fourths of of the full engine load; and 4. continuing to supply the gaseous fuel to the engine up to the full engine load.
Claim 2
Independent Claim
137 words
A method of controlling the supply of a normally gaseous and a normally liquid fuel to a dual-fuel engine for vehicles after it has been started, which comprises the steps of 1. supplying only the liquid fuel to the engine under a no-load condition; 2. continuing to supply the liquid fuel to the engine at an increasing rate as the engine load increases from the no-load condition to a full engine load, a. only the liquid fuel being supplied during a first, low load range; 3. also supplying the gaseous fuel to the engine at an increasing rate during a second, higher load range above the first load range and up to about three-fourths of of the full engine load; and 4. continuing to supply the gaseous fuel to the engine up to the full engine load.
Claim 3
Dependent Claim
40 words
continuing to supply the liquid fuel to the engine at an increasing rate as the engine load increases from the no-load condition to a full engine load, a. only the liquid fuel being supplied during a first, low load range;
Claim 4
Dependent Claim
40 words
continuing to supply the liquid fuel to the engine at an increasing rate as the engine load increases from the no-load condition to a full engine load, a. only the liquid fuel being supplied during a first, low load range;
Claim 5
Dependent Claim
34 words
The method of claim 1, wherein the gaseous fuel is supplied at a rapidly increasing rate during an increase of the engine load from about two-thirds to about three-fourths of the full engine load.
Claim 6
Dependent Claim
34 words
The method of claim 1, wherein the gaseous fuel is supplied at a gradually increasing rate during an increase of the engine load from about one-third to about three-fourths of the full engine load.
Claim 7
Dependent Claim
35 words
also supplying the gaseous fuel to the engine at an increasing rate during a second, higher load range above the first load range and up to about three-fourths of of the full engine load; and
Claim 8
Dependent Claim
35 words
also supplying the gaseous fuel to the engine at an increasing rate during a second, higher load range above the first load range and up to about three-fourths of of the full engine load; and
Claim 9
Dependent Claim
15 words
continuing to supply the gaseous fuel to the engine up to the full engine load.
Claim 10
Dependent Claim
15 words
continuing to supply the gaseous fuel to the engine up to the full engine load.
Claim 11
Dependent Claim
220 words
In an apparatus for supplying a normally gaseous and a normally liquid fuel to a dual-fuel engine for vehicles, which apparatus comprises a fuel injection pump operable to supply the liquid fuel to the engine, an adjusting member for controlling the rate of supply of the liquid fuel, a controller for controlling the gaseous fuel supply rate, the controller comprising means defining a gaseous fuel passage bore, a spring-biased valve member axially urged toward the bore to assume a closed position wherein the valve member adjoins the bore and shuts off the supply of the gaseous fuel through the bore, a valve pin carried by the valve member for protruding into the bore, and means operatively connecting the adjusting member to the valve member for moving the valve member away from the bore in response to a movement of the adjusting member corresponding to an increase of the engine load from a no-load condition, the improvement of the valve pin comprising a cylindrical portion adjoining the valve member and having a diameter matching the bore, the cylindrical valve pin portion having a length at least equal to the length of the stroke of the valve member from the no-load position to a position corresponding to about one-third of the full engine load, and a tapered portion adjoining the cylindrical portion.
Claim 12
Dependent Claim
220 words
In an apparatus for supplying a normally gaseous and a normally liquid fuel to a dual-fuel engine for vehicles, which apparatus comprises a fuel injection pump operable to supply the liquid fuel to the engine, an adjusting member for controlling the rate of supply of the liquid fuel, a controller for controlling the gaseous fuel supply rate, the controller comprising means defining a gaseous fuel passage bore, a spring-biased valve member axially urged toward the bore to assume a closed position wherein the valve member adjoins the bore and shuts off the supply of the gaseous fuel through the bore, a valve pin carried by the valve member for protruding into the bore, and means operatively connecting the adjusting member to the valve member for moving the valve member away from the bore in response to a movement of the adjusting member corresponding to an increase of the engine load from a no-load condition, the improvement of the valve pin comprising a cylindrical portion adjoining the valve member and having a diameter matching the bore, the cylindrical valve pin portion having a length at least equal to the length of the stroke of the valve member from the no-load position to a position corresponding to about one-third of the full engine load, and a tapered portion adjoining the cylindrical portion.
Claim 13
Dependent Claim
209 words
In an appaRatus for supplying a normally gaseous and a normally liquid fuel to a dual-fuel engine for vehicles, which comprises a fuel injection pump operable to supply the liquid fuel to the engine, an adjusting member for controlling the rate of supply of the liquid fuel, a controller for controlling the gaseous fuel supply rate, the controller comprising means defining a gaseous fuel passage bore, a valve pin arranged to be moved into and out of the bore, and means operatively connecting the adjusting member to the valve pin for the movement thereof, the improvement of the valve pin comprising a cylindrical portion having a diameter matching the bore, the means connecting the adjusting member and valve pin being arranged to move the cylindrical valve pin portion into the bore to shut off any flow of the gaseous fuel through the bore when the adjusting member is in a position corresponding to a no-load condition of the engine, and to move the cylindrical valve pin portion entirely out of the bore in response to a movement of the adjusting member corresponding to an increase of the engine load to at least about one-third of the full engine load, and a tapered portion adjoining the cylindrical valve pin portion.
Claim 14
Dependent Claim
209 words
In an appaRatus for supplying a normally gaseous and a normally liquid fuel to a dual-fuel engine for vehicles, which comprises a fuel injection pump operable to supply the liquid fuel to the engine, an adjusting member for controlling the rate of supply of the liquid fuel, a controller for controlling the gaseous fuel supply rate, the controller comprising means defining a gaseous fuel passage bore, a valve pin arranged to be moved into and out of the bore, and means operatively connecting the adjusting member to the valve pin for the movement thereof, the improvement of the valve pin comprising a cylindrical portion having a diameter matching the bore, the means connecting the adjusting member and valve pin being arranged to move the cylindrical valve pin portion into the bore to shut off any flow of the gaseous fuel through the bore when the adjusting member is in a position corresponding to a no-load condition of the engine, and to move the cylindrical valve pin portion entirely out of the bore in response to a movement of the adjusting member corresponding to an increase of the engine load to at least about one-third of the full engine load, and a tapered portion adjoining the cylindrical valve pin portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |