GB2164701A - Piston for direct injection diesel engine - Google Patents

Piston for direct injection diesel engine Download PDF

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Publication number
GB2164701A
GB2164701A GB08423554A GB8423554A GB2164701A GB 2164701 A GB2164701 A GB 2164701A GB 08423554 A GB08423554 A GB 08423554A GB 8423554 A GB8423554 A GB 8423554A GB 2164701 A GB2164701 A GB 2164701A
Authority
GB
United Kingdom
Prior art keywords
piston
chamber
insert
fuel
diesel engine
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.)
Withdrawn
Application number
GB08423554A
Other versions
GB8423554D0 (en
Inventor
Gordon Lawrence Bird
Derek Knight
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Motor Co
Original Assignee
Ford Motor Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ford Motor Co filed Critical Ford Motor Co
Priority to GB08423554A priority Critical patent/GB2164701A/en
Publication of GB8423554D0 publication Critical patent/GB8423554D0/en
Publication of GB2164701A publication Critical patent/GB2164701A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0085—Materials for constructing engines or their parts
    • F02F7/0087—Ceramic materials
    • 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
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/16—Chamber shapes or constructions not specific to sub-groups F02B19/02 - F02B19/10
    • F02B19/165—The shape or construction of the pre-combustion chambers is specially adapted to be formed, at least in part, of ceramic material
    • 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
    • F02B23/0696—W-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 wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/28—Other pistons with specially-shaped head
    • F02F3/285—Other pistons with specially-shaped head the head being provided with an insert located in or on the combustion-gas-swept surface
    • 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
    • F02B2023/0612—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 having a high temperature and pressure resistance, e.g. ceramic
    • 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
    • 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
    • F02B23/0654—Thermal treatments, e.g. with heating elements or local cooling
    • 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
    • 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
    • F02B23/0678—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets
    • F02B23/069—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets characterised by its eccentricity from the cylinder 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0403—Refractory metals, e.g. V, W
    • F05C2201/0412—Titanium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0436—Iron
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel
    • 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

Abstract

A part of the bowl 18 in the crown 12 of the piston is insulated, with the insulation being at the surfaces 24 towards which the injector jets 22 are aimed. The insulation helps to maintain a high temperature at these surfaces and thus to reduce the ignition delay. The insulation is provided by a cast iron, steel, titanium or ceramic cast-in annular insert 26 which may be integral with a ring support insert 28. <IMAGE>

Description

SPECIFICATION Piston for an internal combusion engine This invention relates to a piston for an internal combustion engine, and particularly to a piston for a direct injection diesel engine.
Diesel engines have a reputation for being noisy. This noise arises from a number of sources, one of which is combustion noise. It is highly desirable to be able to reduce this noise.
It is known that reductions in diesel engine combustion noise can be achieved by reducing ignition delay and retarding the injection timing. The ignition delay is dependent on fuel and air temperature-the higher the temperature the shorter the delay. One way of increasing the temperature in the combustion chamber of a diesel engine is to insulate the walls of the combustion chamber.
It has however been found that complete insulation of the chamber has two undesirable effects. These are firstly reduced volumetric efficiency and secondly increased NOX ignition levels.
According to the present invention, there is provided a piston for a direct injection diesel engine, the piston having a chamber formed in the piston crown with the walls of the chamber being insulated in those regions towards which fuel is injected, in use, from an injector jet.
This step serves to keep at a relatively high temperature the points at which the incoming fuel will be directed, so that the fuel is vapourised early, thus reducing ignition delay.
Preferably the other surfaces of the combustion chamber are uninsulated.
Preferably the insulation of the piston chamber will be arranged in an annular ring around the chamber wall. However the actual position of the insulator will depend on the shape of the combustion chamber and on the positioning and direction of the fuel injectors. The necessary insulation can be achieved by the use of a material of low thermal conductivity inserted into the piston in the appropriate areas. Suitable materials include cast iron, steel, titanium and ceramics.
In a particulariy advantageous embodiment, a cast-in insulating insert can be linked to a top piston ring insert to assist retention of the insulating material in the appropriate place in the piston chamber.
The invention will now be further described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a section through a piston in accordance with the invention; Figure 2 is a plan view of the piston shown in Fig. 1; Figure 3 is a section through an alternative form of piston in accordance with the invention; and Figure 4 is a plan view of the piston of Fig.
3.
Fig. 1 shows a piston 10 which has a crown 12 and a bore 14 for a gudgeon pin.
Near to the top of the piston are two annular grooves 16 for receiving piston rings in a known manner.
The piston crown 12 includes a bowl 18 which acts as a combustion chamber. A fuel injector 20 is mounted in the cylinder wall (not shown). The piston 10 will move up and down in a cylinder relative to the injector 20.
At the appropriate point in the engine cycle the relative positions of the injector 20 and the piston 10 will be as shown in Fig. 1. At this point, fuel is injected into the bowl 18, in jets 22. As is known, these jets will be fine jets and there may, for example, be four or five such jets angularly spaced from one another.
The jets 22 are directed towards wall portions 24 of the bowl, and these wall portions are formed by the surface of an insulating body 26 which is in fact annular, as can be seen from Fig. 2. The insulating body 26 can be in the form of an insert which may be made of cast iron, steel, titanium, ceramics or any other suitable material of low thermal conductivity. The presence of this body thus serves to maintain a relatively high local temperature on the wall surfaces 24 of the chamber and the result of this is that the fuel 22 is vapourised earlier than would otherwise be the case because of the increased local temperatures. Although the fuel is directed towards the walls 24, it probably vapourises before it actually reaches the walls.The result of the increased temperature produced by the presence of the insulating body 26 is to reduce the ignition delay without adversely affecting volumetric efficiency and NOX emission.
Fig. 3 shows one way in which the insert 26 can be held in place. It is known to provide in a piston an insert 28 to support the top piston ring. As shown in Fig. 2, the materials of the insert 28 can be the same as the material of the insert 26, and these two inserts can be linked through suitably placed bores in the top of the piston so as to form connecting legs 30. The inserts 26 and 28 are thus formed in a single casting operation, together with the legs 30. This provides an effective means of securing the insert 26 in the bowl 18.
The invention is applicable to any form of direct injection chamber shape including re-entrant type bowls, and also extends to injectors with any number of holes.
1. A piston for a direct injection diesel engine, the piston having a chamber formed in the piston crown with the walls of the chamber being insulated in those regions towards which fuel is injected, in use, from an injector
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (12)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Piston for an internal combusion engine This invention relates to a piston for an internal combustion engine, and particularly to a piston for a direct injection diesel engine. Diesel engines have a reputation for being noisy. This noise arises from a number of sources, one of which is combustion noise. It is highly desirable to be able to reduce this noise. It is known that reductions in diesel engine combustion noise can be achieved by reducing ignition delay and retarding the injection timing. The ignition delay is dependent on fuel and air temperature-the higher the temperature the shorter the delay. One way of increasing the temperature in the combustion chamber of a diesel engine is to insulate the walls of the combustion chamber. It has however been found that complete insulation of the chamber has two undesirable effects. These are firstly reduced volumetric efficiency and secondly increased NOX ignition levels. According to the present invention, there is provided a piston for a direct injection diesel engine, the piston having a chamber formed in the piston crown with the walls of the chamber being insulated in those regions towards which fuel is injected, in use, from an injector jet. This step serves to keep at a relatively high temperature the points at which the incoming fuel will be directed, so that the fuel is vapourised early, thus reducing ignition delay. Preferably the other surfaces of the combustion chamber are uninsulated. Preferably the insulation of the piston chamber will be arranged in an annular ring around the chamber wall. However the actual position of the insulator will depend on the shape of the combustion chamber and on the positioning and direction of the fuel injectors. The necessary insulation can be achieved by the use of a material of low thermal conductivity inserted into the piston in the appropriate areas. Suitable materials include cast iron, steel, titanium and ceramics. In a particulariy advantageous embodiment, a cast-in insulating insert can be linked to a top piston ring insert to assist retention of the insulating material in the appropriate place in the piston chamber. The invention will now be further described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a section through a piston in accordance with the invention; Figure 2 is a plan view of the piston shown in Fig. 1; Figure 3 is a section through an alternative form of piston in accordance with the invention; and Figure 4 is a plan view of the piston of Fig. 3. Fig. 1 shows a piston 10 which has a crown 12 and a bore 14 for a gudgeon pin. Near to the top of the piston are two annular grooves 16 for receiving piston rings in a known manner. The piston crown 12 includes a bowl 18 which acts as a combustion chamber. A fuel injector 20 is mounted in the cylinder wall (not shown). The piston 10 will move up and down in a cylinder relative to the injector 20. At the appropriate point in the engine cycle the relative positions of the injector 20 and the piston 10 will be as shown in Fig. 1. At this point, fuel is injected into the bowl 18, in jets 22. As is known, these jets will be fine jets and there may, for example, be four or five such jets angularly spaced from one another. The jets 22 are directed towards wall portions 24 of the bowl, and these wall portions are formed by the surface of an insulating body 26 which is in fact annular, as can be seen from Fig. 2. The insulating body 26 can be in the form of an insert which may be made of cast iron, steel, titanium, ceramics or any other suitable material of low thermal conductivity. The presence of this body thus serves to maintain a relatively high local temperature on the wall surfaces 24 of the chamber and the result of this is that the fuel 22 is vapourised earlier than would otherwise be the case because of the increased local temperatures. Although the fuel is directed towards the walls 24, it probably vapourises before it actually reaches the walls.The result of the increased temperature produced by the presence of the insulating body 26 is to reduce the ignition delay without adversely affecting volumetric efficiency and NOX emission. Fig. 3 shows one way in which the insert 26 can be held in place. It is known to provide in a piston an insert 28 to support the top piston ring. As shown in Fig. 2, the materials of the insert 28 can be the same as the material of the insert 26, and these two inserts can be linked through suitably placed bores in the top of the piston so as to form connecting legs 30. The inserts 26 and 28 are thus formed in a single casting operation, together with the legs 30. This provides an effective means of securing the insert 26 in the bowl 18. The invention is applicable to any form of direct injection chamber shape including re-entrant type bowls, and also extends to injectors with any number of holes. CLAIMS
1. A piston for a direct injection diesel engine, the piston having a chamber formed in the piston crown with the walls of the chamber being insulated in those regions towards which fuel is injected, in use, from an injector jet.
2. A piston as claimed in Claim 1, wherein other regions of the piston are uninsulated.
3. A piston as claimed in Claim 1 or Claim 2, wherein the insulation of the piston chamber is arranged in an annular ring around the chamber wall.
4. A piston as claimed in any preceding claim, wherein an insulating insert of a material of low thermal conductivity is inserted into the piston in the appropriate areas.
5. A piston as claimed in Claim 4, wherein the insulating material is cast iron.
6. A piston as claimed in Claim 4, wherein the insulating material is steel.
7. A piston as claimed in Claim 4, wherein the insulating material is titanium.
8. A piston as claimed in Claim 4, wherein the insulating material is a ceramic.
9. A piston as claimed in any one of Claims 4 to 8, wherein the insert is cast-in to the piston and is linked to a top piston ring insert to assist retention of the insulating material in the appropriate place in the piston chamber.
10. A piston for a direct injection diesel engine, substantially as herein described with reference to any one embodiment shown in the accompanying drawings.
11. A direct engine diesel engine having pistons as claimed in any preceding claim.
12. An engine as claimed in Claim 11, wherein the cylinder head is uninsulated.
GB08423554A 1984-09-18 1984-09-18 Piston for direct injection diesel engine Withdrawn GB2164701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08423554A GB2164701A (en) 1984-09-18 1984-09-18 Piston for direct injection diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08423554A GB2164701A (en) 1984-09-18 1984-09-18 Piston for direct injection diesel engine

Publications (2)

Publication Number Publication Date
GB8423554D0 GB8423554D0 (en) 1984-10-24
GB2164701A true GB2164701A (en) 1986-03-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB08423554A Withdrawn GB2164701A (en) 1984-09-18 1984-09-18 Piston for direct injection diesel engine

Country Status (1)

Country Link
GB (1) GB2164701A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2596808A1 (en) * 1986-04-04 1987-10-09 Rech Machines Thermiqu Centre Direct injection diesel engine piston
EP0241869A1 (en) * 1986-04-12 1987-10-21 Isuzu Motors Limited Combustion chamber for internal combustion engines
GB2329676A (en) * 1997-09-30 1999-03-31 Bosch Gmbh Robert Preventing damage to a compression-ignition i.c. engine by providing a continuously hot site to burn off incorrectly injected fuel
WO2007136130A1 (en) * 2006-05-24 2007-11-29 Toyota Jidosha Kabushiki Kaisha Piston for internal-combustion engines
RU2459964C2 (en) * 2007-10-30 2012-08-27 Вольво Ластвагнар Аб Reduction device of hazardous emissions of internal combustion engine of transport vehicle
WO2013066924A1 (en) * 2011-10-31 2013-05-10 Federal-Mogul Corporation Coated piston and a method of making a coated piston

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB307745A (en) * 1928-03-12 1930-01-23 Acro Ag Improvements relating to the compression chambers of the cylinders of self-ignition oil engines
GB357586A (en) * 1930-06-25 1931-09-25 Harry Ralph Ricardo Improvements in or relating to internal combustion engines of the liquid fuel injection compression ignition type
GB502385A (en) * 1937-04-17 1939-03-16 Wifredo Pelayo Ricart Improvements in or relating to direct injection internal combustion engines
GB588322A (en) * 1945-02-08 1947-05-20 Lister & Co Ltd R A Improvements in or relating to pistons
GB807633A (en) * 1956-11-26 1959-01-21 Wendell Chester Cheney Piston with head insert and process of making it
GB1519647A (en) * 1975-01-06 1978-08-02 Texaco Development Corp Engine piston with insulated combustion chamber

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB307745A (en) * 1928-03-12 1930-01-23 Acro Ag Improvements relating to the compression chambers of the cylinders of self-ignition oil engines
GB357586A (en) * 1930-06-25 1931-09-25 Harry Ralph Ricardo Improvements in or relating to internal combustion engines of the liquid fuel injection compression ignition type
GB502385A (en) * 1937-04-17 1939-03-16 Wifredo Pelayo Ricart Improvements in or relating to direct injection internal combustion engines
GB588322A (en) * 1945-02-08 1947-05-20 Lister & Co Ltd R A Improvements in or relating to pistons
GB807633A (en) * 1956-11-26 1959-01-21 Wendell Chester Cheney Piston with head insert and process of making it
GB1519647A (en) * 1975-01-06 1978-08-02 Texaco Development Corp Engine piston with insulated combustion chamber

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2596808A1 (en) * 1986-04-04 1987-10-09 Rech Machines Thermiqu Centre Direct injection diesel engine piston
EP0241869A1 (en) * 1986-04-12 1987-10-21 Isuzu Motors Limited Combustion chamber for internal combustion engines
GB2329676A (en) * 1997-09-30 1999-03-31 Bosch Gmbh Robert Preventing damage to a compression-ignition i.c. engine by providing a continuously hot site to burn off incorrectly injected fuel
GB2329676B (en) * 1997-09-30 1999-12-29 Bosch Gmbh Robert Method for the purpose of operating an internal combustion engine and an internal combustion engine adapted to implement the method
US6105553A (en) * 1997-09-30 2000-08-22 Robert Bosch Gmbh Method and fuel injection system for operating in internal combustion engine
WO2007136130A1 (en) * 2006-05-24 2007-11-29 Toyota Jidosha Kabushiki Kaisha Piston for internal-combustion engines
US8001947B2 (en) 2006-05-24 2011-08-23 Toyota Jidosha Kabushiki Kaisha Piston for internal-combustion engines
CN101449046B (en) * 2006-05-24 2011-11-16 丰田自动车株式会社 Piston for internal-combustion engines
RU2459964C2 (en) * 2007-10-30 2012-08-27 Вольво Ластвагнар Аб Reduction device of hazardous emissions of internal combustion engine of transport vehicle
WO2013066924A1 (en) * 2011-10-31 2013-05-10 Federal-Mogul Corporation Coated piston and a method of making a coated piston
CN104024616A (en) * 2011-10-31 2014-09-03 费德罗-莫格尔公司 Coated piston and a method of making a coated piston
US8863720B2 (en) 2011-10-31 2014-10-21 Federal-Mogul Corporation Coated piston and a method of making a coated piston

Also Published As

Publication number Publication date
GB8423554D0 (en) 1984-10-24

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