FR2647515A1 - Sealed arrangement of a crankshaft end bearing cap - Google Patents

Sealed arrangement of a crankshaft end bearing cap Download PDF

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Publication number
FR2647515A1
FR2647515A1 FR8906860A FR8906860A FR2647515A1 FR 2647515 A1 FR2647515 A1 FR 2647515A1 FR 8906860 A FR8906860 A FR 8906860A FR 8906860 A FR8906860 A FR 8906860A FR 2647515 A1 FR2647515 A1 FR 2647515A1
Authority
FR
France
Prior art keywords
bearing cap
block
arrangement
crankshaft
lateral
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
Application number
FR8906860A
Other languages
French (fr)
Other versions
FR2647515B1 (en
Inventor
Gabriel Laine
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Priority to FR8906860A priority Critical patent/FR2647515B1/en
Publication of FR2647515A1 publication Critical patent/FR2647515A1/en
Application granted granted Critical
Publication of FR2647515B1 publication Critical patent/FR2647515B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F11/00Arrangements of sealings in combustion engines
    • F02F11/007Arrangements of sealings in combustion engines involving rotary applications
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00Casings, e.g. crankcases or frames
    • F02F7/0043Arrangements of mechanical drive elements
    • F02F7/0053Crankshaft bearings fitted in the crankcase
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C9/00Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/02Crankshaft bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/02Sealings between relatively-stationary surfaces
    • F16J15/021Sealings between relatively-stationary surfaces with elastic packing
    • F16J15/022Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/02Sealings between relatively-stationary surfaces
    • F16J15/06Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/061Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with positioning means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads
    • F02F1/02Cylinders; Cylinder heads having cooling means
    • F02F1/10Cylinders; Cylinder heads having cooling means for liquid cooling
    • F02F2001/104Cylinders; Cylinder heads having cooling means for liquid cooling using an open deck, i.e. the water jacket is open at the block top face

Abstract

The invention relates to a sealed arrangement of a bearing cap 16 of a crankshaft end 14 of an internal combustion engine 10 received in a housing of the cylinder block 12 which opens out into the transverse end face 18 of the latter 12 and which is delimited by at least two lateral faces 20, 22 parallel to the axis X-X of the crankshaft 14 and to the two opposing lateral faces 40, 42 of the bearing cap 16, a sealing gasket being received in each of the two spaces delimited by the said opposed faces 20-40, 22-42. According to the invention, each of the two spaces for the sealing gaskets includes an opening making it possible to insert the sealing gasket therein in a direction which is parallel to the axis X-X of the crankshaft 14. <IMAGE>

Description

 The present invention relates to a sealed arrangement of an end bearing cap of an internal combustion engine crankshaft received in a housing of the cylinder block which opens in the transverse end face of the latter and which is delimited by at least two lateral faces parallel to the axis of the crankshaft and to the two lateral faces opposite the bearing cap. a seal being received in each of the two spaces delimited by said opposite faces.

 In one type of design of the architecture of an internal combustion engine, the cylinder block receives the end bearing cap on the coupling side with the gearbox by pressing against the transverse bottom of the housing and the upper face of the latter, the cap being held by two screws which pass through it vertically and are screwed into the cylinder block. The underside of the cylinder block and the bearing cap are substantially coplanar in order to be able to cooperate with the corresponding flat face of the lower oil pan.

 Between the lateral faces opposite the bearing cap and the housing which receives it, there remains a play of construction. In order to ensure sealing at the bearing cap, it has already been proposed to mount each of the seals in a groove formed in the lateral face of the bearing cap and which extends vertically over the entire height of the latter. , The upper end of. the trim can include a vertical retaining heel of the trim. When the assembly is in place, the seal must protrude down a few millimeters in order to be compressed by the face facing the oil pan.

 It can be seen that the fitting of the linings and that the assembly operations of such an arrangement are particularly complicated.

 One of the methods used up to now consists in particular of compressing the seals in their grooves on the bearing cap beforehand using additional metal components until the cap is put in place, the clamping components then being removed to allow the linings to cooperate with the lateral faces opposite the cap housing.

In the event of faulty mounting, oil leaks are noted at the level of the bearing cap, which requires complete disassembly and reassembly of the assembly.

 In order to remedy these drawbacks, the invention provides an arrangement of the type mentioned above, characterized in that each of the two spaces has an opening allowing the seal to be introduced therein in a direction parallel to the axis of the crankshaft.

According to other features of the invention
the space is constituted by a lateral recess formed in the lateral face of the bearing cap which extends from the external transverse face of the cap in the direction of the portion of the transverse end face of the cylinder block constituting the bottom of the housing and this over at least part of the axial thickness of the bearing cap
- the seal is a block of elastomeric material which, in the assembled position, is compressed laterally in the corresponding space
- The lateral faces of the sealing block comprise at least one peripheral sealing lip which cooperates with the opposite walls of the bearing cap and of the housing
- The lateral faces of the sealing block comprise a projecting peripheral bead which cooperates with an axial retaining rim of the block formed at least on the lateral face of the bearing cap
- The sealing block includes a reinforcing reinforcement which extends axially in the block and which is extended by a fixing lug which extends perpendicular to the reinforcement and which is fixed on a portion of the lateral face of end of cylinder block
- the bracket is fixed by means of screws.

Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the accompanying drawings in which
- Figure I is an axial end view of the engine block of an internal combustion engine equipped with a sealing arrangement according to the invention before the installation of the seals
- Figure 2 is an enlarged perspective view of the bearing cap of Figure 1 and one of the two packings
- Figure 3 is an enlarged perspective view of a second embodiment of the seal, the latter being shown opposite the space in which it is received and in the unassembled position
- Figure 4 is a sectional view through a horizontal plane of the arrangement of Figure 3, the gasket being shown in the inserted position but not compressed; and
- Figure 5 is a view similar to that of Figure 4 in which the seal is in the final mounting position compressed in its mounting space.

 The engine block 10 shown in FIG. 1 comprises a cylinder block 12 which receives a crankshaft 14 of axis X-X which is horizontal when considering the figure.

 The crankshaft 14 is held in the cylinder block 12 by different bearing caps and by at least one end bearing cap 16.

 The bearing cap 16 is received in a housing formed in the transverse end face 18 of the cylinder block 12. The housing is delimited by two vertical faces parallel to the axis XX 20 and 22, by an upper face 24 and by a face 26 constituting the bottom of the housing which is an axially recessed portion of the transverse end face 18 of the cylinder block.

 The bearing cap 16 is fixed in the housing by means of two screws 28 and 30 which extend vertically in holes 32 and 34 of the cap 16 and the ends of which are received in corresponding threaded holes formed in the upper face 24 of the housing.

 The engine block 10 finally comprises an oil sump 36 which is sealingly mounted against the underside 38 of the cylinder block 12 and against the underside of the cap.

 The bearing cap 16 shown in FIG. 2 is delimited laterally by two parallel vertical side faces 40 and 42 which are received with a slight tightening opposite the side faces 20 and 22 of the housing. The upper horizontal face 43 of the bearing cap 16 has a semi-cylindrical recess 49 for the end of the crankshaft 14.

 We will now describe the sealing arrangement according to the invention with reference to the right part of the bearing cap 16 while considering FIG. 2, the arrangement on the left being symmetrical and identical.

 It can be seen in FIG. 2 that a lateral offset 44 is provided in the face 42.

 The recess 44 extends axially from the external transverse face 50 in the direction of the rear transverse face 52 intended to bear against the bottom 26 of the housing. The step 44 extends axially over a depth "p" slightly less than the axial thickness of the bearing cap 16. A symmetrical step 46 is provided in the other lateral face 40.

 The lateral face 42 includes a retaining rim 48 which extends vertically along the external face 50 and finally a second vertical recess 53 which makes it possible to reduce the remaining vertical height of the lateral face 42 in order to avoid jamming of the cap. bearing during assembly.

A flange 54 and a recess 56 are provided symmetrically.

 In the first embodiment shown in Figure 2, the seal 60 is a block of elastomeric material whose general shape is complementary to that of the space in which it is received between the faces 22, 24, 44 and the upper face 62 of the housing 36.

 According to the invention, it can be introduced into this space parallel to the direction of the axis X-X given the axial opening formed by the step 44.

 The seal 60 is a block of elastomeric material 64 of substantially rectangular section and which comprises two peripheral sealing yeasts 66 and 68 provided to cooperate with the facing faces.

 The block 64 also includes a peripheral bead 70 which cooperates with the rim 48 to ensure the axial retention in position of the lining 60 in its space and in the compressed position after mounting.

 The block 64 finally comprises an external heel 72 which bears against the external transverse face of the bearing cap 16.

 The fitting of the lining 60 is particularly easy since, after having assembled the bearing cap 16 in its housing by means of the screws 28 and 30 and the oil sump 36 on the cylinder block 12, there no longer remains that introduce the seal 60 into the space provided for this purpose by pushing it axially towards the bottom 26 of the housing, the peripheral sealing lips ensuring perfect sealing in all directions.

 In Figure 3 there is shown schematically the cylinder block and the bearing cap which are identical to the elements described with reference to Figures 1 and 2. The space provided for receiving the seal has a rectangular section of width a1, of length b1 and axial depth p. In this new embodiment, the bearing cap 16 does not have an axial retaining rim such as the rims 48 and 54. The seal is a parallelepipedal block of elastomeric material 80 which is designed to be mounted compressed in its space mounting.

 To this end, it includes a reinforcing metal frame 82.

 The armature folded at t80 'at its end 82 is embedded in the block 80 and thus extends axially in the packing housing.

 At rest, that is to say in the unassembled position as in Figure 3, or in the uncompressed position as in Figure 4, the width "a" and the height "b" of the block 80 are slightly less than the width al and at the height bt mentioned above. In order to allow compression of the block 80 in the space provided for this purpose, the frame 82 is extended by a fixing lug 84 which extends perpendicularly to the latter and therefore parallel to the transverse end face. 18 of cylinder block 10.

 The fixing lug 84 has two fixing holes 86 provided for the passage of two fixing screws 88 which are screwed axially in tapped holes 90 on the face 18 of the cylinder block 10.

Before the axial compression operation, the lining has an overall depth "h" (which extends from the face of the fixing lug 84 to the end face 92 of the lining) which is significantly greater at the depth "p" of the space in which it must enter received, There is therefore a tightening dimension s
The mounting operation is carried out by screwing the screws 88 until the fixing lug 84 comes to bear against the face 18 of the cylinder block 10.

 In this final position shown in FIG. 5, the sealing block 80 is compressed axially, which has the effect of causing it to widen in all directions and therefore the peripheral compression of all of its lateral faces by the faces or walls opposite the block. -cylinders or bearing cap. Perfect sealing of the device is thus also ensured.

 Compared to the first embodiment, this second embodiment of the seal allows for easier disassembly without destroying the seal block 80.

Claims (7)

 1. Watertight arrangement of a bearing cap (16) of the end of a crankshaft (14) of an internal combustion engine (10) received in a housing of the cylinder block (12) which opens in the transverse face d end (18) of the latter (12) and which is delimited by at least two lateral faces (20, 22) parallel to the axis (XX) of the crankshaft (14) and to the two lateral faces (40, 42) in opposite the bearing cap (16). a seal (60, 80) being received in each of the two spaces delimited by said opposite faces (20-40, 22-42), characterized in that each of said two spaces has an opening allowing 'introduce the seal (60, 80) in a direction parallel to the axis (XX) of the crankshaft (14).
 2. Arrangement according to claim t, characterized in that the space is constituted by a lateral recess (44, 46) formed in the lateral face (42, 40) of the bearing cap (16) which extends from the face transverse outer (50) of the cap towards the portion of the transverse end face (18) of the cylinder block (12) constituting the bottom (26) of the housing, and this on at least one part (p) of the axial thickness of the bearing cap (16).
 3. Arrangement according to one of claims 1 or 2, characterized in that the seal (60, 80) is a block of elastomeric material (64, 80) which, in the assembled position, is compressed laterally in said space corresponding,
 4. Arrangement according to claim 3, characterized in that the lateral faces of the sealing block comprise at least one yeast (66, 68) sealing device which cooperates with the opposite walls of the bearing cap ( 16) and the cylinder block (12).
 5. Arrangement according to one of claims 3 or 4, characterized in that the lateral faces of the sealing block (64) comprise a peripheral bead (70) projecting which cooperates with a flange (48, 54) of axial retention of the block (64) formed at least on the lateral face of the bearing cap (16).
 6. Arrangement according to claim 3, characterized in that the sealing block (80) comprises a reinforcing reinforcement (82) which extends axially in the block and which is extended by a fixing lug (84) which s 'extends perpendicular to the frame and which is fixed on a portion of the lateral end face (18) of the cylinder block (12),
 7. Arrangement according to claim 6, characterized in that the fixing lug (84) is fixed by means of screws (88).
FR8906860A 1989-05-25 1989-05-25 Sealed arrangement of a crankshaft end bearing cap Expired - Fee Related FR2647515B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8906860A FR2647515B1 (en) 1989-05-25 1989-05-25 Sealed arrangement of a crankshaft end bearing cap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8906860A FR2647515B1 (en) 1989-05-25 1989-05-25 Sealed arrangement of a crankshaft end bearing cap

Publications (2)

Publication Number Publication Date
FR2647515A1 true FR2647515A1 (en) 1990-11-30
FR2647515B1 FR2647515B1 (en) 1991-09-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8906860A Expired - Fee Related FR2647515B1 (en) 1989-05-25 1989-05-25 Sealed arrangement of a crankshaft end bearing cap

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FR (1) FR2647515B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2789144A1 (en) * 1999-02-03 2000-08-04 Joint Francais Aircraft panel seal has internal reinforcing member with projections for joining to panel by fixings
DE102017006355A1 (en) * 2017-06-23 2018-12-27 Mtu Friedrichshafen Gmbh bearing cap

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655135A (en) * 1948-12-29 1953-10-13 Int Harvester Co Seal structure for use between a wall and a plate assembled therewith
US3353832A (en) * 1965-05-24 1967-11-21 Felt Products Mfg Co Sealing assembly
US3913928A (en) * 1973-05-09 1975-10-21 Seiichi Yamaguchi Resilient joint
US4265495A (en) * 1979-08-20 1981-05-05 Allis-Chalmers Corporation Engine block and crankshaft bearing seal
EP0056347A2 (en) * 1981-01-12 1982-07-21 Nissan Motor Co., Ltd. Low noise level internal combustion engine
EP0139337A2 (en) * 1983-10-19 1985-05-02 Pidou B.V. Multi-part sealing system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655135A (en) * 1948-12-29 1953-10-13 Int Harvester Co Seal structure for use between a wall and a plate assembled therewith
US3353832A (en) * 1965-05-24 1967-11-21 Felt Products Mfg Co Sealing assembly
US3913928A (en) * 1973-05-09 1975-10-21 Seiichi Yamaguchi Resilient joint
US4265495A (en) * 1979-08-20 1981-05-05 Allis-Chalmers Corporation Engine block and crankshaft bearing seal
EP0056347A2 (en) * 1981-01-12 1982-07-21 Nissan Motor Co., Ltd. Low noise level internal combustion engine
EP0139337A2 (en) * 1983-10-19 1985-05-02 Pidou B.V. Multi-part sealing system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2789144A1 (en) * 1999-02-03 2000-08-04 Joint Francais Aircraft panel seal has internal reinforcing member with projections for joining to panel by fixings
DE102017006355A1 (en) * 2017-06-23 2018-12-27 Mtu Friedrichshafen Gmbh bearing cap

Also Published As

Publication number Publication date
FR2647515B1 (en) 1991-09-13

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