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US4368702A
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Method of operating an air-compressing, self-igniting internal combustion engine
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1980-01-09
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Granted: 1983-01-18
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Expires: 2000-01-09
Abstract
Abstract A method and apparatus for operating an air-compressing, self-igniting combustion machine or engine, for liquid fuels, which has a combustion chamber depression, in the piston, into which fuel is sprayed or injected essentially centrally, preferably in a direction toward the depression wall, and in which the combustion air rotates at the time of injection. Oxygen-containing fuel that is reluctant to ignite is injected through an injection device into the combustion chamber depression, and an ignitible fuel is sprayed or injected through a second injection device, with an overlap in the injection times of the ignitible fuel and the oxygen-containing fuel that is reluctant to ignite. Ignition of the oil fuel, gas oil or Diesel fuel starts before injection of the oxygen-containing fuel that is reluctant to ignite. After approximately 2/3 of the injection time of the Diesel fuel, there begins the injection of the oxygen-containing fuel which is reluctant to ignite. During cold starting, only Diesel fuel is injected in a quantity sufficient for cold starting, until attaining a low idling speed. The volume ratio of Diesel fuel to the oxygen-containing fuel reluctant to ignite is approximately 1:30 at full load. The injection devices for the two fuels may be embodied in a single nozzle body.
Inventors
- 👤 Gerhard Finsterwalder
- 👤 Jakob Saftig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:58
CPC Classifications
F; F02; F02B; F02B23/00; F02B23/02; F02B23/06; F02B23/0645; F02B23/0663; F02B23/0669; F02B23/0672; F02B3/00; F02B3/06; F02B69/00; F02B69/02; F02B7/00; F02B7/02; F02M; F02M43/00; F02M61/00; F02M61/14; F02B2201/00; F02B2201/06; F02B2275/00; F02B2275/14; F02B23/0618; F02B23/0621; F02M2200/00; F02M2200/85; F02M2200/855; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
226 words
A method of operating an air compressing, self-igniting internal combustion engine for liquid fuels to burn primarily oxygen-containing liquid fuels which are reluctant to ignite soley due to compression in the engine, which engine has at least one cylinder with a piston therein the piston having a combustion chamber depression therein for receiving injected fuel and a rotating charge of air, the method comprising the steps of: during each cycle of the engine, injecting a first, defined stream of diesel-cycle fuel in a path toward the wall of the combustion chamber wherein the fuel ignites upon compression in the engine reaching a predetermined level to subsequently ignite an oxygen containing fuel; subsequent to starting injection of the diesel-cycle fuel, injecting a plurality of defined streams of said oxygen-containing fuel toward the wall of the depression along paths which do not intersect the path of the first stream to minimize cooling of the diesel-cycle fuel by the oxygen-containing fuel, the injection of diesel-cycle fuel being generally adjacent the center of the combustion chamber depression, and overlapping the injection of the diesel-cycle fuel with the injection of the oxygen-containing fuel, whereby ignition of the diesel-cycle fuel occurs first and subsequently causes ignition of the oxygen-containing fuel which ignition of the oxygen-containing fuel powers the engine while ignition of the diesel-cycle fuel merely serves to ignite the oxygen-containing fuel.
Claim 2
Independent Claim
226 words
A method of operating an air compressing, self-igniting internal combustion engine for liquid fuels to burn primarily oxygen-containing liquid fuels which are reluctant to ignite soley due to compression in the engine, which engine has at least one cylinder with a piston therein the piston having a combustion chamber depression therein for receiving injected fuel and a rotating charge of air, the method comprising the steps of: during each cycle of the engine, injecting a first, defined stream of diesel-cycle fuel in a path toward the wall of the combustion chamber wherein the fuel ignites upon compression in the engine reaching a predetermined level to subsequently ignite an oxygen containing fuel; subsequent to starting injection of the diesel-cycle fuel, injecting a plurality of defined streams of said oxygen-containing fuel toward the wall of the depression along paths which do not intersect the path of the first stream to minimize cooling of the diesel-cycle fuel by the oxygen-containing fuel, the injection of diesel-cycle fuel being generally adjacent the center of the combustion chamber depression, and overlapping the injection of the diesel-cycle fuel with the injection of the oxygen-containing fuel, whereby ignition of the diesel-cycle fuel occurs first and subsequently causes ignition of the oxygen-containing fuel which ignition of the oxygen-containing fuel powers the engine while ignition of the diesel-cycle fuel merely serves to ignite the oxygen-containing fuel.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein approximately two-thirds of the diesel-cycle fuel injected during each cycle is injected before injecting the oxygen-containing fuel.
Claim 4
Dependent Claim
39 words
The method of claim 1 wherein the diesel-cycle fuel is injected from a location radially displaced from the location of the oxygen-containing fuel injection to provide a longer free stream length from the path assumed by the diesel-cycle fuel.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the diesel-cycle fuel is injected at the same location the oxygen-containing fuel is injected.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein the ratio of diesel cycle fuel to oxygen containing fuel is approximately 1:30.
Claim 7
Independent Claim
55 words
The method of claims 1, 2, 3, 4 or 5 wherein the diesel-cycle fuel is selected from the group consisting of n-heptane, oil fuel, gas oil and diesel fuel and wherein the oxygen-containing fuel is selected from the groups consisting of methanol, ethanol and a higher alcohol including up to 30% by volume of impurities.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |