US1901838A - Piston for internal combustion engines - Google Patents

Piston for internal combustion engines Download PDF

Info

Publication number
US1901838A
US1901838A US343725A US34372529A US1901838A US 1901838 A US1901838 A US 1901838A US 343725 A US343725 A US 343725A US 34372529 A US34372529 A US 34372529A US 1901838 A US1901838 A US 1901838A
Authority
US
United States
Prior art keywords
piston
chamber
shell
cast
internal combustion
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.)
Expired - Lifetime
Application number
US343725A
Inventor
Baur Ottmar
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.)
ACRO AG
Original Assignee
ACRO AG
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 ACRO AG filed Critical ACRO AG
Application granted granted Critical
Publication of US1901838A publication Critical patent/US1901838A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02F3/00—Pistons 
    • F02F3/26—Pistons  having combustion chamber in 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
    • 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

Definitions

  • the present invention relates to internal combustion engines of the ty in which the compression chambers comprises partly the piston so that that portion of the core used on casting which has to occupy this space is very weak and can only be removed with difficulty after casting.
  • the result is that the grains of sand left behind on removing the core become loose on running of the engine and drop into the lubricating oil fed to the crank casing and contaminate such oil.
  • guard shell which may be in the form of a sleeve, preferably stamped out of sheet metal, and also cast in position, which encloses the cast shell and contacts with it at its cast-in edge, but leaves a space between this and the side wall of the cast shell.
  • the guard shell therefore acts to a certain extent as a casting core for the narrow ortion between the cast shell and the ad- Jacent cast wall.
  • a indicates a cylinder, the cylinder head and 0 an in ection nozzle mounted in the head.
  • a cast piston operating in the cylinder is indicated by d and the cylinder chamber varying on the piston stroke by c.
  • the latter is connected with an auxiliary chamber h provided in the piston, by means of a frusto-conical chamber f and a throttling orifice g.
  • the cylinder chamber 6, frustoconical chamber f and auxiliar chamber h to ether form the compression 0 amber.
  • he base and side walls of the chamber h are formed by an insert in the form of a metal shell'z' which is only cast into the piston at its edge In.
  • the cover of the chamber h and also the walls of the frusto-conical chamber f are formed by a metal casing member m resscd into the shell 1'.
  • the cast shell z itsel is inserted in a guard shell preferably. in the form of a sleeve n pressed out of sheet metal which encloses the shell and only contacts with the cast-in edge thereof.
  • a free narrow annular space 0 is left between the sleeve and the side wall of the shell 2'.
  • the core inserted in the casting and defining the interior of the piston need only extend, in the form of construction shown,-up to the dotted line 1).
  • the sleeve n is provided with a base g which is arranged at a short distance from the base of the auxiliary chamber.
  • a separate air insulating chamber is formed round the portion of the edge of the outer wall of the chamber which is not cast in.
  • the base g prevents oil coming into contact with the base of the chamber, which is heated" during running, and vapourizing there to form carbon deposit.
  • a small hole 1' is provided in the centre of the base g of the sleeve through which the variations in pressure set up in the air insulating chamber, as a result of the temperature difi'erences obtaining on casting and running, can be equalized.
  • a depression 8 is also pressed out in the base 9 which acts as a bottom for the core used on casting.
  • the application of the invention is of course not limited to engines in which the auxiliary chamber his provided in the piston or in which the auxiliary chamber is connected with the actual cylinder chamber by a throttling member and a frusto-conical chamber.
  • the auxiliary chamber can also '2 l morass be provided in a cast shell arranged in the cylinder head or in the cylinder.
  • a piston of an internal combustion engine comprising cylindrical side Walls, a perforated end wall adapted to form one bounding surface of the cylinder chamber of the internal combustion engine, a shell cast at its edges only in the perforated end Wall of said piston to form a pocket with said perforation and a guard shell cast at its edges only with the edges of said first mentioned shell in said perforated end wall of said Biston and an extension of said guard s ell adapted to closely follow the inner surface of said cylindrical wall 'of said piston.
  • a piston for an internal combustion engine comprising a cast piston havin an orifice in that face which forms a boun ing surface for the engine compression chamber, a shell cast within said piston at its edges only in that wall of the piston having said orifice and about said orifice to form an auxiliary chamber leading to said compression chamber through said orifice, a cast in guard sleeve for the inner wall of said piston, said sleeve contacting with said shell at one end only and extending from the points of said I contact to closely follow'the inner surface of the cylindrical wall of the piston and to leave a space between said sleeve and said shell, said sleeve having a transversely extending end portion enclosing saidspace.

Description

March 14, 1933.
o. BAUR PISTON FOR INTERNAL COMBUSTION ENGINES Filed- March 1, 1929 Patented Mar. 14, 1933 UNITED STATES PATENT OFFICE oa'rm BLUE, 0F STUTTGAB'I, ASSIGNOB '10 A CBO AKTIENGESELLBGELIT, O! KUSSHACKT-OH-BIGI, SWITZERLAND PISTON NB INTERNAL OOKBUS'I'ION ENGINES Application filed larch 1, 1988, Serial No. 843,725, and in Germany July 1 8, 1828.
The present invention relates to internal combustion engines of the ty in which the compression chambers comprises partly the piston so that that portion of the core used on casting which has to occupy this space is very weak and can only be removed with difficulty after casting. The result is that the grains of sand left behind on removing the core become loose on running of the engine and drop into the lubricating oil fed to the crank casing and contaminate such oil.
ill
- half.
These disadvantages are overcome according to the invention by means of a guard shell which may be in the form of a sleeve, preferably stamped out of sheet metal, and also cast in position, which encloses the cast shell and contacts with it at its cast-in edge, but leaves a space between this and the side wall of the cast shell. The guard shell therefore acts to a certain extent as a casting core for the narrow ortion between the cast shell and the ad- Jacent cast wall.
The invention is more particularly described with reference to the accompanying drawing which shows two suitable forms of construction and in which y Figure 1 is a longitudinal sectional view of one form with the auxiliary chamber mounted in the piston. The right hand-half of the drawing in a longitudinal section turned through 90 relative to the left hand Figure 2 is a longitudinal sectional view of a modified form of construction.
In Figure l, a indicates a cylinder, the cylinder head and 0 an in ection nozzle mounted in the head. A cast piston operating in the cylinder is indicated by d and the cylinder chamber varying on the piston stroke by c. The latter is connected with an auxiliary chamber h provided in the piston, by means of a frusto-conical chamber f and a throttling orifice g. The cylinder chamber 6, frustoconical chamber f and auxiliar chamber h to ether form the compression 0 amber.
he base and side walls of the chamber h are formed by an insert in the form of a metal shell'z' which is only cast into the piston at its edge In. The cover of the chamber h and also the walls of the frusto-conical chamber f are formed by a metal casing member m resscd into the shell 1'. The cast shell z itsel is inserted in a guard shell preferably. in the form of a sleeve n pressed out of sheet metal which encloses the shell and only contacts with the cast-in edge thereof. A free narrow annular space 0 is left between the sleeve and the side wall of the shell 2'.
The core inserted in the casting and defining the interior of the piston need only extend, in the form of construction shown,-up to the dotted line 1). e
The main diflerence between the second form of construction shown in Figure 2 and the first is that the sleeve n is provided with a base g which is arranged at a short distance from the base of the auxiliary chamber. Thus a separate air insulating chamber is formed round the portion of the edge of the outer wall of the chamber which is not cast in. Further the base g prevents oil coming into contact with the base of the chamber, which is heated" during running, and vapourizing there to form carbon deposit.
A small hole 1' is provided in the centre of the base g of the sleeve through which the variations in pressure set up in the air insulating chamber, as a result of the temperature difi'erences obtaining on casting and running, can be equalized. A depression 8 is also pressed out in the base 9 which acts as a bottom for the core used on casting.
The application of the invention is of course not limited to engines in which the auxiliary chamber his provided in the piston or in which the auxiliary chamber is connected with the actual cylinder chamber by a throttling member and a frusto-conical chamber. The auxiliary chamber can also '2 l morass be provided in a cast shell arranged in the cylinder head or in the cylinder.
What is claimed is:
1. A piston of an internal combustion engine comprising cylindrical side Walls, a perforated end wall adapted to form one bounding surface of the cylinder chamber of the internal combustion engine, a shell cast at its edges only in the perforated end Wall of said piston to form a pocket with said perforation and a guard shell cast at its edges only with the edges of said first mentioned shell in said perforated end wall of said Biston and an extension of said guard s ell adapted to closely follow the inner surface of said cylindrical wall 'of said piston.
2. A piston for an internal combustion engine comprising a cast piston havin an orifice in that face which forms a boun ing surface for the engine compression chamber, a shell cast within said piston at its edges only in that wall of the piston having said orifice and about said orifice to form an auxiliary chamber leading to said compression chamber through said orifice, a cast in guard sleeve for the inner wall of said piston, said sleeve contacting with said shell at one end only and extending from the points of said I contact to closely follow'the inner surface of the cylindrical wall of the piston and to leave a space between said sleeve and said shell, said sleeve having a transversely extending end portion enclosing saidspace.
In testimony whereof I have hereunto affixed my signature. 1
' OTTMAR BAUR.
US343725A 1928-07-13 1929-03-01 Piston for internal combustion engines Expired - Lifetime US1901838A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1901838X 1928-07-13

Publications (1)

Publication Number Publication Date
US1901838A true US1901838A (en) 1933-03-14

Family

ID=7748433

Family Applications (1)

Application Number Title Priority Date Filing Date
US343725A Expired - Lifetime US1901838A (en) 1928-07-13 1929-03-01 Piston for internal combustion engines

Country Status (1)

Country Link
US (1) US1901838A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906924A (en) * 1972-05-17 1975-09-23 Elsbett L Piston with central combustion chamber for injection-type internal combustion engines
US4465033A (en) * 1978-10-25 1984-08-14 Blaser Richard Florencio Energy conversion cycle for internal combustion engine and apparatus for carrying out the cycle
FR2551494A1 (en) * 1983-09-07 1985-03-08 Kervagoret Alain METHOD FOR IMPROVING THE OPERATION OF AN INTERNAL COMBUSTION ENGINE, DEVICE FOR CARRYING OUT SAID METHOD, AND INTERNAL COMBUSTION ENGINE EQUIPPED WITH SAID DEVICE
US5052356A (en) * 1976-10-19 1991-10-01 Sonex Research, Inc. Method for control of pressure in internal combustion engines
US5117788A (en) * 1976-10-19 1992-06-02 Sonex Research, Inc. Apparatus for control of pressure in internal combustion engines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906924A (en) * 1972-05-17 1975-09-23 Elsbett L Piston with central combustion chamber for injection-type internal combustion engines
US5052356A (en) * 1976-10-19 1991-10-01 Sonex Research, Inc. Method for control of pressure in internal combustion engines
US5117788A (en) * 1976-10-19 1992-06-02 Sonex Research, Inc. Apparatus for control of pressure in internal combustion engines
US4465033A (en) * 1978-10-25 1984-08-14 Blaser Richard Florencio Energy conversion cycle for internal combustion engine and apparatus for carrying out the cycle
FR2551494A1 (en) * 1983-09-07 1985-03-08 Kervagoret Alain METHOD FOR IMPROVING THE OPERATION OF AN INTERNAL COMBUSTION ENGINE, DEVICE FOR CARRYING OUT SAID METHOD, AND INTERNAL COMBUSTION ENGINE EQUIPPED WITH SAID DEVICE
EP0144277A1 (en) * 1983-09-07 1985-06-12 Alain Kervagoret Combustion engine running process, device for carrying out this process and an internal-combustion engine fitted with this device

Similar Documents

Publication Publication Date Title
US1901838A (en) Piston for internal combustion engines
US1679964A (en) Counterthrust pressure piston
US1914940A (en) Cooling of spark plugs and the like
US1553854A (en) Internal-combustion engine for aircraft
US1905140A (en) Valve for internal combustion engines
US2169381A (en) Internal combustion engine of the compression ignition type
US1847457A (en) Combination fuel pump and crank case ventilator
US2641235A (en) Engine rocker arm mechanism
US1800077A (en) Internal-combustion-engine piston
US2403260A (en) Valve guide of internal-combustion engines
US2021830A (en) Piston ring
US1828335A (en) Centrifugal casting method
US1805874A (en) Terminal construction for ignition coils
US1833128A (en) Chill for sand molds
US1769456A (en) Method of casting cylinder heads
US2067314A (en) Piston
US1557871A (en) Piston
DE481714C (en) Internal combustion engine, in particular a self-igniting injection engine
US1866281A (en) Internal combustion engine
US1624388A (en) Internal-combustion-engine rotary valve member
US1779968A (en) Cooling means for internal-combustion engines
US1771751A (en) Piston
US1336691A (en) louis
US2221287A (en) Internal combustion engine
US1502861A (en) Metal mold