Flywheel for internal combustion engine

An internal combustion engine and inertial flywheel technology, applied in the field of inertial flywheels, can solve problems such as increased complexity and large size

Active Publication Date: 2009-11-04
VALEO EMBRAYAGES SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Assembly of these weights manifests itself in larger size and increased complexity

Method used

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  • Flywheel for internal combustion engine
  • Flywheel for internal combustion engine
  • Flywheel for internal combustion engine

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Experimental program
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Embodiment Construction

[0034] [34] figure 1 The schematic diagram of FIG. 2 shows a rigid inertial flywheel 6, which is generally made of cast iron and fixed on the crankshaft 4 of an internal combustion engine, in particular a motor vehicle internal combustion engine. The flywheel generally comprises a radially outer portion 5 of greater thickness, which imparts a high inertia, and a coupling part 7 between the radially outer portion 5 and the crankshaft 4 . The coupling part 7 is fastened to one end of the crankshaft 4 by means of screws, not shown, arranged along a pair of circles centered on the shaft.

[0035] [35] figure 2 The schematic diagram of FIG. 2 shows a curved flexible inertial flywheel 12 comprising a ring 8, usually made of cast iron, fixed to the outer periphery of an annular plate 10. Said plate 10, screwed to the crankshaft 4, makes the flywheel 12 flexible, allowing bending about an axis, which is perpendicular to the axis of the crankshaft, and exhibiting a surge movement (m...

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Abstract

An inertial flywheel (1) for an internal combustion engine, the flywheel comprising an annular rotating inertial mass body (22), said mass body being fixed at one end of the crankshaft (4) of said engine through a coupling member (14), said The torsional stiffness of the coupling part (14) is less than that of a single crankshaft (4), so that the natural torsional frequency of said crankshaft (4) fixed to said flywheel (1) decreases, while the natural torsional The frequency remains greater than the first frequency produced by a series of combustions in the engine cylinder.

Description

technical field [0001] [01] The present invention relates to an inertial flywheel for an internal combustion engine, in particular a motor vehicle internal combustion engine. Background technique [0002] [02] It is known to use a rigid flywheel, which has a high rotational inertia and is fixed at one end of the crankshaft between the crankshaft and a transmission, in order to drive the wheels, in particular motor vehicle wheels. The purpose of this rigid flywheel is to regulate the rotational speed of the crankshaft. Combustion in the engine cylinders produces a series of momentary torque peaks that the inertial flywheel converts into a substantially vibration-reduced average torque to reduce vibration. [0003] [03] The inertia flywheel forms a mass body (masse) fixed on the crankshaft, so that the crankshaft-flywheel assembly forms a mass body-spring system with a natural frequency of vibration, wherein the crankshaft has a certain resistance to longitudinal bending sti...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F16F15/121F16D3/79
CPCF16F15/3153F16F15/1315
InventorR·韦霍格H·马埃
OwnerVALEO EMBRAYAGES SAS