GB2129489A - Catalyst arrangement in i.c. engine combustion chambers - Google Patents
Catalyst arrangement in i.c. engine combustion chambers Download PDFInfo
- Publication number
- GB2129489A GB2129489A GB08231373A GB8231373A GB2129489A GB 2129489 A GB2129489 A GB 2129489A GB 08231373 A GB08231373 A GB 08231373A GB 8231373 A GB8231373 A GB 8231373A GB 2129489 A GB2129489 A GB 2129489A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- projections
- internal combustion
- combustion engine
- depressions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0636—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston the combustion space having a substantially flat and horizontal bottom
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0603—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0672—Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B51/00—Other methods of operating engines involving pretreating of, or adding substances to, combustion air, fuel, or fuel-air mixture of the engines
- F02B51/02—Other methods of operating engines involving pretreating of, or adding substances to, combustion air, fuel, or fuel-air mixture of the engines involving catalysts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0603—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head
- F02B2023/0606—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head the material being a catalyst
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/14—Direct injection into combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/40—Squish effect
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0618—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion
- F02B23/0621—Squish flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0618—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion
- F02B23/0624—Swirl flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0645—Details related to the fuel injector or the fuel spray
- F02B23/0648—Means or methods to improve the spray dispersion, evaporation or ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0645—Details related to the fuel injector or the fuel spray
- F02B23/0669—Details related to the fuel injector or the fuel spray having multiple fuel spray jets per injector nozzle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
A fuel injection compression ignition engine has a plurality of projections 8 or depressions arranged in the combustion chamber 9. The projections or depressions are coated with a film of a catalyst comprising one of the platinum group metals or a compound thereof to influence the combustion process. <IMAGE>
Description
SPECIFICATION
Compression ignition internal combustion engines
This invention relates to internal combustion engines of the liquid fuel injection compression ignition type.
Such engines are described in United Kingdom paten specification No 901 982. In that specification, it was proposed to provide a series of closely spaced projections or depressions in one or more combustion chambers in open communication with the space between the piston face and cylinder head, in order to disturb to a substantial degree the smooth flow of those portion of the air charge which sweep over and/or between the projections and depressions.
In order to improve the combustion process in compression ignition engines, it has also been proposed to incoporate a platinum catalyst in a combustion chamber in the piston crown, in the form of a mesh extending across a diametrical plane of the chamber. It is thought that this interferes deterimentally with the combustion process however by reducing swirl in the chamber.
The present invention provides an internal combustion engine of the liquid fuel injection compression ignition type of the kind in which the greater proportion of the air charged is forced during each compression stroke into one or more combustion chambers in open communication with the space between the piston face and cylinder head, the chamber or each chamber being approximately a figure of revolution about an axis and the arrangement being such that the air charge in the chamber is caused to be in a state of organised rotation within the chamber or chambers at the end of each compression stroke, in which a fuel injector is arranged to inject fuel into the chamber in the general direction of the axis of the injector, and in which there is disposed within the chamber a series of closely spaced projections or depressions such as to disturb to a substantial degree the smooth flow of those portions of the air charge which sweep over and/or between them, at least part of the surface of the projections or depressions having thereon a finely divided catalytic film of a ,platinum group metal or a compound thereof.
The arrangement of the invention allows advantage to be taken of the projections or depressions and of the platinum catalyst, without the disadvantage of a mesh interferring with the swirl in the combustion chamber,
The catalytic film may comprise platinum or one of the platinum group metals such as paladium or rodium, or the film may comprise a compound of one of these metals. The amount of
metal or compound used will vary depending on
the particular catalyst used. In all cases however,
sufficient will be employed to produce a notable
effect on the combustion initiation process.
The engine may have any of the features
described in patent specification No 901982, the
contents of which are incoporated herein by reference. In particular, the form of the projections or depressions may vary widely. It may be for example of conical or thimble-like form with each projection spaced from its neighbor by depressed areas of surface and can extend either actually or partially at right-angles to or parallel to or in a direction inclined to the general direction of flow of the portions of the air charge over and between them. The projections or depressions preferably have a height or depth of at least 0.22 millimeters, which is to say substantially greater than typical surface roughness.
Advantageously the member is of substantially conical or modified conical shape projecting from the wall of the chamber opposite to the injector and pointing towards the direction from which the fuel is injected.
Advantageously the chamber or each chamber is formed substantially wholly within the piston crown.
The invention will now be described by way of example with reference to the accompanying drawings in which:
Figure 1 is a vertical section through a piston and cylinder of a direct injection compression ignition engine, in which the combustion chamber is substantially wholly within the crown of the piston;
Figure 2 is a view similar to Figure 1 showing a different form of combustion chamber; and
Figure 3 is a view similar to Figure 2, showing a different form of combustion chamber.
Referring first to Figure 1, a piston 1 reciprocating vertically in a cylinder 2 has formed in its crown a combustion chamber 3 in the shape of two superimposed toroids, and liquid fuel is injected directly into this chamber from an injector 4, disposed in the cylinder head 5 and inclined at a small angle to the cylinder axis. The inlet and exhaust valves are not shown. This general shape of open combustion chamber is designed to ensure thorough mixing of the injected fuel with the air charge, which has been in rotation in the form of toroidal eddies by the action of "squish" in the final part of the compression stroke of the piston 1.
In this chamber embodying the invention, there is an insert 6 which is dispersed substantially in the upper part of the chamber 3 and secured by a stud 7 passing up through the underside of the piston crown. The insert 6 is of heat resisting material and is of a modified conical shape with its axis substantially coincident with that of the injector 4. Its curved surface is covered with a series of small conical projections 8, one effect of which is to break up the smooth flow of those portions of the rotation air charge which are closely adjacent to the surface of the insert 6. In this way the intimate mixing of the injected fuel charge with the air charge in this region is ensured and the process of combustion improved.
A more important effect of these projections, however, is the rapid transfer of heat to the fuel and air mixture from the insert 6, which is hot as it has a limited heat-conducting path with the remainder of the walls of the chamber. The presence of the projections 8 increases the area of the surface of the insert 6, as compared with a smooth surface of the same overall dimensions, and the transfer of heat to the charge is accordingly more rapid.
In accordance with the invention the projections 8 are covered by a film of finely divided platinum. During combustion fuel and air will be mixed in the vicinity of the projections which will ensure that the platinum catalyst is advantageously located to assist in the initiation of the reaction. Moreover it will be appreciated that the means for advantageously locating the catalyst are not such as to interfere with the swirling motion of the air charge as has been the case in prior arrangements.
In the double toroidal chamber shown in Figure
1, the air charge has a toroidal rotation in the
upper toroid as a result of "squish" by the piston,
and then, on combustion, the charge rotates also
in the lower toroid.
The arrangement shown in Figure 2 is similar to that of Figure 1 and like parts have been numbered the same, but here the chamber, shown at 9, is of simpler shape, and the insert 10 is of conical shape with a smaller cone angle. The projections 8 are similar to those of Figure 1. The turbulence may be achieved solely by "squish" or it may be assisted by masking of the inlet valve or the use of swirl ports.
The number and size of the projections is not critical in any of the examples and, as indicated earlier, conical or other similar depressions would achieve a similar result. 1t has been found that for best results the height of each projection or depth of each depression should not be less than 0.22 millimeters and they should be of such a form as to increase the area of wall or insert surface over which they extend by at least 10% as compared with a smooth surface of the same overall dimensions. The projections or depressions may be provided on an integral portion of the wall of the combustion chamber or, as indicated in the examples, on a separate insert, and the insert could be of a kind which has limited heatconducting contact with the body of the piston or cylinder head in which it is mounted.
There may be projections on the side walls in addition to a cone covered with projections. In both the arrangements shown the projections are formed on an insert which is bolted to or cast into the piston, but in fact the entire combustion chamber may be formed in an insert, for example by the "lost wax" process, and this insert is cast into the piston. In this case the projections (or depressions) would be integral with the remainder of the combustion chamber wall.
In Figure 3 an annular insert 14 is used coaxially arranged with the fuel injector 1 2 in the combustion chamber 11 in the piston. This is provided with slightly larger conical projections 13 all around its circumference.
Claims (8)
1. An internal combustion engine of the liquid fuel injection compression ignition type of the kind in which the greater proportion of the air charged is forced during each compression stroke into one or more combustion chambers in open communication with the space between the piston face and cylinder head, the chamber or each chamber being approximately a figure of revolution about an axis and the arrangement being such that the air charge in the chamber is caused to be in a state of organised rotation within the chamber or chambers at the end of each compression stroke, in which a fuel injector is arranged to inject fuel into the chamber in the general direction of the axis of the injector, and in which there is disposed within the chamber a series of closely-spaced projections or depressions such as to disturb to a substantial degree the smooth flow of those portions of the air charge which sweep over and/or between them, at least part of the surface of the projections or depressions having thereon a catalytic film of a platinum group metal or a compound thereof.
2. An internal combustion engine as claimed in claim 1, in which the projections or depressions have a height or depth of at least 0.22 millimeters.
3. An internal combustion engine as claimed in claim 1 or claim 2, in which the projections or depressions are of such a form as to increase the area of the surface over which they extend by at least 10% as compared with a smooth surface of the same overall dimensions.
4. An internal combustion engine as claimed in any one of claims 1 to 3, in which the member is in the form of a separate insert mounted in the combustion chamber.
5. An internal combustion engine as claimed in any one of claims 1 to 4, in which the projections or depressions are provided on a member of substantially conical or modified conical shape projecting from the wall of the chamber opposite to the injector and pointing towards the direction from which the fuel is injected.
6. An internal combustion engine as claimed in claim 5, in which the chamber is of double toroidal form, and the member projects upwards into the central region of the upper toroid.
7. An internal combustion engine as claimed in any one of claims 1 to 6, in which the chamber or each chamber is formed substantially wholly in the piston crown.
8. An internal combustion engine substantially as hereinbefore described with reference to
Figures 1, 2 or 3 of the drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08231373A GB2129489B (en) | 1982-11-03 | 1982-11-03 | Catalyst arrangement in i c engine combustion chambers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08231373A GB2129489B (en) | 1982-11-03 | 1982-11-03 | Catalyst arrangement in i c engine combustion chambers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2129489A true GB2129489A (en) | 1984-05-16 |
| GB2129489B GB2129489B (en) | 1986-10-01 |
Family
ID=10534006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08231373A Expired GB2129489B (en) | 1982-11-03 | 1982-11-03 | Catalyst arrangement in i c engine combustion chambers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2129489B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10148129A1 (en) * | 2001-09-28 | 2003-04-17 | Volkswagen Ag | Combustion engine, especially self-igniting combustion engine, has surface of component of combustion chamber with layer having catalytically-active component |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB414398A (en) * | 1932-03-17 | 1934-07-31 | Gewerkschaft Mathias Stinnes | Improvements in direct injection compression ignition oil engines |
| GB455329A (en) * | 1935-11-19 | 1936-10-19 | Teerverwertung Gmbh | Improvements in or relating to diesel oil engines |
| GB831311A (en) * | 1955-06-10 | 1960-03-30 | Maschf Augsburg Nuernberg Ag | Improvements in and relating to internal-combustion engines |
| GB901982A (en) * | 1958-07-16 | 1962-07-25 | Rover Co Ltd | Internal combustion engines of the liquid fuel injection compression ignition type |
| GB2097856A (en) * | 1981-03-26 | 1982-11-10 | British Leyland Cars Ltd | Precombustion chambers containing catalyst |
| GB2099919A (en) * | 1981-06-05 | 1982-12-15 | Hagino Shigeo | Catalytic combustion in internal combustion engines |
-
1982
- 1982-11-03 GB GB08231373A patent/GB2129489B/en not_active Expired
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB414398A (en) * | 1932-03-17 | 1934-07-31 | Gewerkschaft Mathias Stinnes | Improvements in direct injection compression ignition oil engines |
| GB455329A (en) * | 1935-11-19 | 1936-10-19 | Teerverwertung Gmbh | Improvements in or relating to diesel oil engines |
| GB831311A (en) * | 1955-06-10 | 1960-03-30 | Maschf Augsburg Nuernberg Ag | Improvements in and relating to internal-combustion engines |
| GB901982A (en) * | 1958-07-16 | 1962-07-25 | Rover Co Ltd | Internal combustion engines of the liquid fuel injection compression ignition type |
| GB2097856A (en) * | 1981-03-26 | 1982-11-10 | British Leyland Cars Ltd | Precombustion chambers containing catalyst |
| GB2099919A (en) * | 1981-06-05 | 1982-12-15 | Hagino Shigeo | Catalytic combustion in internal combustion engines |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10148129A1 (en) * | 2001-09-28 | 2003-04-17 | Volkswagen Ag | Combustion engine, especially self-igniting combustion engine, has surface of component of combustion chamber with layer having catalytically-active component |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2129489B (en) | 1986-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| USRE30426E (en) | I.C. Engines | |
| SU1080754A3 (en) | Internal combustion engine | |
| SE542212C2 (en) | A piston with a piston bowl comprising protrusions for an internal combustion engine | |
| US4538566A (en) | Combustion chamber in a diesel engine | |
| US20090139485A1 (en) | Direct injection two-stroke engine | |
| US4492194A (en) | Spark-ignition air-compressing internal combustion engine | |
| US4309969A (en) | Induction system with high-swirl intake valve | |
| US3209735A (en) | Piston and cylinder construction for internal combustion engines | |
| US3039445A (en) | Internal combustion engines of the liquid fuel injection compression ignition type | |
| US6003487A (en) | Internal combustion engine | |
| US4041923A (en) | Internal combustion engine of lean air-fuel mixture combustion type | |
| CA1092461A (en) | Internal combustion engine having one or more compression gaps between a piston and cylinder head | |
| GB2129489A (en) | Catalyst arrangement in i.c. engine combustion chambers | |
| JPS5666419A (en) | Combustion chamber of internal combustion engine | |
| JPS62255524A (en) | Pent roof type direct injection internal combustion engine | |
| JPH0517369B2 (en) | ||
| SE8008692L (en) | AIR COMPRESSOR, DIRECT INJECTION COMBUSTION ENGINE | |
| EP0828066B1 (en) | Combustion chamber of diesel engine | |
| US4513709A (en) | Internal combustion engine and cylinder head therefor | |
| JPH05106519A (en) | Exhaust gas recirculation device for spark ignition engine | |
| US4273079A (en) | Air-compressing direct injection internal combustion engine | |
| JPS60224920A (en) | Combustion chamber structure in piston-top surface | |
| GB2097856A (en) | Precombustion chambers containing catalyst | |
| JP3692749B2 (en) | Piston for in-cylinder internal combustion engine | |
| SU1550195A1 (en) | Ic-engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19921103 |