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Crankshaft having optimized crankpin lubrication, and related engine and method for producing the lubrication system

A crank pin, engine technology, applied in the direction of the crankshaft, etc., can solve the problems of complexity, increased oil leakage of the journal, etc.

Active Publication Date: 2014-02-05
PEZHO SITROEN AUTOMOBILS SA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The construction with a single crank pin per journal, which presents disadvantages in terms of implementation complexity and cost, but also leads to an increase in the amount of oil leakage at the journals

Method used

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  • Crankshaft having optimized crankpin lubrication, and related engine and method for producing the lubrication system
  • Crankshaft having optimized crankpin lubrication, and related engine and method for producing the lubrication system
  • Crankshaft having optimized crankpin lubrication, and related engine and method for producing the lubrication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] According to the longitudinal sectional view of the crankshaft 1, in figure 1 An in-line four-cylinder internal combustion engine is shown in .

[0047] The crankshaft 1 has a journal 2 on either side of which a first crank pin 31 and a second crank pin 32 are positioned. The first arm 41 connects the journal 2 with the first crank pin 31 . The second arm 42 connects the journal 2 with the second crank pin 32 .

[0048] A lubrication circuit allows oil to be supplied from the journal to the crankpin. In the range of engines shown here, each crankpin is oiled by a different journal. The first crankpin 31 is supplied with oil via the journal 2 . To this end, a first straight duct 51 is provided between the journal 2 and the first crankpin 31 , passing substantially through the center of the central plane PB1 of the first arm 41 . The first duct 51 opens on the surface of the journal 2 at the location of its transverse center plane PT on the one hand and on the other ...

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PUM

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Abstract

The invention relates to a crankshaft comprising at least: a journal; a first crankpin; a second crankpin; a first arm connecting the first crankpin to the journal; a second arm connecting the second crankpin to the journal; a first pipe extending away from the first crank pin toward the journal and leading onto the surface of the first crankpin on the transverse median plane thereof, and substantially passing to the center of the median plane of the second arm; and a second conduit extending away from the second crankpin toward the journal and leading onto the surface of the second crankpin on the transverse median plane thereof, and substantially passing to the center of the median plane of the second arm, characterized in that the shape of the crankshaft is such that it cannot also comprise a diametric pipe within the transverse median plane of the journal fluidly adjoining the first pipe and the second pipe, and the crankshaft comprises a third non-diametric pipe within the transverse median plan of the journal fluidly connecting the first pipe and the second pipe.

Description

field of invention [0001] The present invention relates to the field of lubrication of internal combustion engines, and more particularly to the lubrication of attelages, ie the lubrication of assemblies comprising pistons, connecting rods and crankshafts. Background technique [0002] All internal combustion engines include pistons with at least one crankshaft. The crankshaft forms the crank of the connecting rod-crank system that allows the conversion of the reciprocating motion of the pistons into the rotational motion of the engine flywheel. [0003] In order to ensure the reliability of the coupling between the crankshaft at the crank pin and the corresponding connecting rod, it is necessary to lubricate this coupling. Lubrication involves the use of pressurized oil in this joint. [0004] Rather, the main oil gallery of the engine supplies oil to the bearing pads of the shafting / journal arranged between the engine assembly and the journal of the crankshaft. These be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C3/14
CPCF16C3/14Y10T29/49286
Inventor F·古佐纳C·派若昂
Owner PEZHO SITROEN AUTOMOBILS SA