US3744469A - Reciprocating piston internal combustion engine - Google Patents

Reciprocating piston internal combustion engine Download PDF

Info

Publication number
US3744469A
US3744469A US00136495A US3744469DA US3744469A US 3744469 A US3744469 A US 3744469A US 00136495 A US00136495 A US 00136495A US 3744469D A US3744469D A US 3744469DA US 3744469 A US3744469 A US 3744469A
Authority
US
United States
Prior art keywords
main bearing
cylinder block
internal combustion
combustion engine
bearing cover
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
US00136495A
Other languages
English (en)
Inventor
A Schmid
J Reisacher
F Noltemeyer
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.)
Daimler Benz AG
Original Assignee
Daimler Benz 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 Daimler Benz AG filed Critical Daimler Benz AG
Application granted granted Critical
Publication of US3744469A publication Critical patent/US3744469A/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
    • F02F7/00—Casings, e.g. crankcases
    • F02F7/0043—Arrangements of mechanical drive elements
    • F02F7/0053—Crankshaft bearings fitted in the crankcase

Definitions

  • the present invention relates to a reciprocating piston internal combustion engine with a cylinder block as well as with a main bearing and a main bearing cover of a crankcase, which are connected with each other by means of bolts.
  • the main hearing is connected with the cylinder block, on the one hand, and with the main bearing cover, on the other, by different bolts which are arranged mutually offset over the circumference.
  • An unfavorable force flow in the main bearing results therefrom.
  • forceconducting or force-transmitting threads are provided in the main hearing so that the danger of crack formations exists in the main bearing made, as is customary, of light-weight metal.
  • the present invention is concerned with the task to eliminate the aforementioned disadvantages.
  • the underlying problems are solved according to the present invention in that the bolts extending from the cylinder block to the main bearing cover engage exclusively at the same whereas they extend freely through the main bearing so that the forces acting on the bolts are transmitted directly to the cylinder block or the main hearing cover.
  • the reciprocating piston internal combustion engine By the construction of the reciprocating piston internal combustion engine according to the present invention, no threads and therewith also no threaded bushes are present in the main bearing.
  • the force flow'in the main bearing is very favorable, especially as the forces acting on the main bearing are transmitted by way of large and contiguous separating surfaces to the cylinder block and the main bearing cover and not in a pointlike manner to the bolts.
  • the manufacture and assembly is considerably simplified by the present invention compared to the prior art reciprocating piston internal combustion engines.
  • the bolts may be inserted both from the main bearing cover with threads in the cylinder block as also from the cylinder block with threads in the main bearing cover.
  • Another object of the present invention resides in a reciprocating piston internal combustion engine which not only assures a favorable force flow from the main bearing but also eliminates the necessity of threads or threaded bushings in the main bearing.
  • a further object of the present invention resides in a reciprocating piston internal combustion engine of the type described above which eliminates the danger of crack formation in light-weight main bearings.
  • a further object of the present invention resides in a reciprocating piston internal combustion engine which greatly facilitates the manufacture and assembly of the engine.
  • the single FIGURE is a partial cross-sectional view through a reciprocating piston internal combustion engine in accordance with the present invention.
  • reference numeral 1 designates therein a cylinder block within which slides a piston 2 that is connected by way of a connecting rod 3 with a crankshaft (not shown).
  • a crankcase which includes a main bearing 4 and a main bearing cover 5, adjoins the cylinder block 1.
  • the separating plane with respect to an oil pan (not shown) is indicated by reference numeral 6.
  • the main bearing cover 5 and the main bearing 4 are connected with the cylinder block 1 by means of bolts 7 which are inserted in the direction from the oil pan and are screwed into threads 8 provided in the cylinder housing 1.
  • the bolts 7 extend freely through openings or bores 9 and 10 provided in the main bearing 4 and in the main bearing cover 5 so that these parts are held only by clamping forces.
  • fitting pins may be provided between the cylinder block 1 and the main bearing 4 as well as between the latter and the mainbearing cover 5. Since these fitting pins may be of conventional construction, they are not shown in the drawing for sake of simplicity.
  • a reciprocating piston internal combustion engine which includes a cylinder block as well as a main hearing means and a main bearing cover means of a crank case, which are connected with each other by bolt means, characterized in that the bolt means extending from the cylinder block to the main bearing cover means exclusively engage at the cylinder block and the main bearing cover means whereas said bolt means extend freely through the main bearing means so that the forces acting on said main bearing means are transmitted exclusively and directly to the cylinder block or the main bearing cover means, one of said cylinder block and said main bearing cover means including threaded bore means threadably connected to said bolt means, whereby said forces act on said bolt means only through said cylinder block and said main bearing cover means.
  • An internal combustion engine according to claim 3 An internal combustion engine according to claim 1, characterized in that the main bearing means is made 2, characterized in that said bolt means includes a bolt f li ht-wei ht metal, head engaging at the exposed end of the mam bearing 7.
  • An internal combustion engine according to claim An internal accofdirfg to claim 1, characterized in that the main bearing means and where! the f F of s'ald mam beanng m f f main bearing cover means are only held onto the cylin- 10 engagement wlth 531d cylinder block and 531d mam der block by clamping forces exerted by said bolt bearing cover arc Planar surfaces extending P p means. ular to the longitudinal extent of said bolt means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
US00136495A 1970-04-24 1971-04-22 Reciprocating piston internal combustion engine Expired - Lifetime US3744469A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702020011 DE2020011A1 (de) 1970-04-24 1970-04-24 Hubkolbenbrennkraftmaschine

Publications (1)

Publication Number Publication Date
US3744469A true US3744469A (en) 1973-07-10

Family

ID=5769190

Family Applications (1)

Application Number Title Priority Date Filing Date
US00136495A Expired - Lifetime US3744469A (en) 1970-04-24 1971-04-22 Reciprocating piston internal combustion engine

Country Status (3)

Country Link
US (1) US3744469A (Direct)
DE (1) DE2020011A1 (Direct)
FR (1) FR2090551A5 (Direct)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014022A1 (de) * 2008-03-13 2009-09-17 Honsel Ag Verfahren zur Herstellung eines Zylinderblocks sowie Zylinderblock für eine Brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014022A1 (de) * 2008-03-13 2009-09-17 Honsel Ag Verfahren zur Herstellung eines Zylinderblocks sowie Zylinderblock für eine Brennkraftmaschine

Also Published As

Publication number Publication date
FR2090551A5 (Direct) 1972-01-14
DE2020011A1 (de) 1971-11-11

Similar Documents

Publication Publication Date Title
US3176542A (en) Connecting rod arrangement
US4598672A (en) Apparatus for stabilizing the position of a yoke in an internal combustion engine
GB2148451A (en) Structure of internal-combustion engine piston
GB1355820A (en) Piston cooling and or small-end bearing lubrication arrangement for ic engines
US4033312A (en) Crankcase for multi-cylinder reciprocable piston internal combustion engines
GB1315801A (en) Internal combustion engines provided with air compressors
US3889553A (en) Connecting rod assembly
US3744469A (en) Reciprocating piston internal combustion engine
US4624156A (en) Crankshaft assembly
US3874358A (en) Engine conversion system
US2731960A (en) Internal combustion engine with die cast block
US2489527A (en) Crankshaft lubrication
GB503261A (en) Improvements in and relating to high speed internal combustion engines
US2136416A (en) Piston
US3135254A (en) Internal combustion engine
US2899946A (en) Two-cycle gasoline engine
US3279267A (en) Reciprocating machine and a method for assembling it
US1898145A (en) Composite cylinder for internal combustion engines
US3786796A (en) Method and apparatus for taking out piston in trunk piston engine
GB735087A (en) Improvements in crankshaft arrangements for internal combustion engines
GB498455A (en) Improvements in and relating to single-acting crosshead combustion engines
US1633769A (en) Multicylinder automotive compressor
GB1331079A (en) V-type internal combustion engine
WO1983000359A1 (en) Assembling, lubrificating and ignition of an internal combustion engine
GB1207298A (en) An improved connecting rod for a trunk piston engine