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US 6,782,773 B1Granted
System for coupling a toothed starter ring to a support connected to the output shaft of an internal combustion engine
AssigneeS.A. Defontaine
InventorsEric Jacquemont, Jean-Pierre Rocheteau, Franck Douillard
Life of this patent
Estimating the term…
Abstract
In a system for coupling a toothed starter ring to a support connected to the output shaft of an internal combustion engine, a complementary substantially cylindrical peripheral surface of the ring is fixed over at least a part of its extent to a substantially cylindrical peripheral surface of the support in such a manner that the ring can deform slightly in the radial direction toward the shaft to reduce the maximum stresses exerted on the ring during a starting operation.
Claims44
An internal combustion engine flywheel comprising:
- a support connected to an output shaft of an internal combustion engine and a starter toothed ring adapted to cooperate with a rotor of a starter motor of said internal combustion engine,
- said support having a peripheral part which receives said ring and includes a substantially cylindrical peripheral surface for fixing said ring to said support, and
- said ring having an inside peripheral part which is fixed to said support and includes a substantially cylindrical inside peripheral surface complementary to said peripheral surface of said support, wherein
- said complementary substantially cylindrical peripheral surface of said ring is fixed over at least part of its extent to said substantially cylindrical peripheral surface of said support in such a manner that said ring is deformable in the radial direction toward said shaft to reduce the maximum stresses exerted on said ring during a starting operation, and
- said substantially cylindrical peripheral surfaces are connected to each other by a metal-to-metal fixation.
2 more elements
An internal combustion engine flywheel comprising:
- a support connected to an output shaft of an internal combustion engine and a starter toothed ring adapted to cooperate with a rotor of a starter motor of said internal combustion engine,
- said support having a peripheral part which receives said ring and includes a substantially cylindrical peripheral surface for fixing said ring to said support, and
- said ring having an inside peripheral part which is fixed to said support and includes a substantially cylindrical inside peripheral surface complementary to said peripheral surface of said support,
- wherein said complementary substantially cylindrical peripheral surface of said ring is fixed over at least part of its extent to said substantially cylindrical peripheral surface of said support, and
- said ring includes an annular groove extending axially inwardly from an external radial surface delimiting said ring toward said rotor in such a manner that said ring is deformable in the radial direction toward said shaft to reduce the maximum stresses exerted on said ring during a starting operation.
2 more elements
An internal combustion engine flywheel comprising:
- a support connected to an output shaft of an internal combustion engine and a starter toothed ring adapted to cooperate with a rotor of a starter motor of said internal combustion engine,
- said support having a peripheral part which receives said ring and includes a substantially cylindrical peripheral surface for fixing said ring to said support, and
- said ring having an inside peripheral part which is fixed to said support and includes a substantially cylindrical inside peripheral surface complementary to said peripheral surface of said support, wherein
- said peripheral surface of said support has a recess in the area of each of at least one of:
- diametrically opposed sectors corresponding to compression areas, and
- diametrically opposed sectors corresponding to expansion areas;
- and
- said complementary substantially cylindrical peripheral surface of said ring is fixed to said substantially cylindrical peripheral surface of said support only between said recesses in such a manner that said ring is deformable in the radial direction toward said shaft to reduce the maximum stresses exerted on said ring during a starting operation.
5 more elements
An internal combustion engine flywheel comprising:
- a support connected to an output shaft of an internal combustion engine and a starter toothed ring adapted to cooperate with a rotor of a starter motor of said internal combustion engine,
- said support having a peripheral part which receives said ring and includes a substantially cylindrical peripheral surface for fixing said ring to said support, and
- said ring having an inside peripheral part which is fixed to said support and includes a substantially cylindrical inside peripheral surface complementary to said peripheral surface of said support,
- wherein said complementary substantially cylindrical peripheral surface of said ring is fixed over at least part of its extent to said substantially cylindrical peripheral surface of said support in such a manner that said ring is deformable in the radial direction toward said shaft to reduce the maximum stresses exerted on said ring during a starting operation,
- said peripheral part of said support with said substantially cylindrical peripheral surface and a radial surface of contact between said ring and said support has a shape so as to form in radial section an inside angle that is substantially a right angle,
- said inside peripheral part of said ring with said complementary substantially cylindrical inside peripheral surface and a complementary radial surface in contact over at least a part of its extent with said radial surface of said support has a complementary shape so as to form in radial section an outside angle that is substantially a right angle, and
- said complementary peripheral surface of said ring is fixed over at least a part of its extent to said peripheral surface of said support in such a manner that said complementary radial surface of said ring is slidable along said radial surface of said support.
4 more elements
An internal combustion engine flywheel comprising:
- a support connected to an output shaft of an internal combustion engine and a starter toothed ring adapted to cooperate with a rotor of a starter motor of said internal combustion engine,
- said support having a peripheral part which received said ring and includes a substantially cylindrical peripheral surface for fixing said ring to said support, and
- said ring having an inside peripheral part which is fixed to said support and includes a substantially cylindrical inside peripheral surface complementary to said peripheral surface of said support, wherein
- said complementary substantially cylindrical peripheral surface of said ring is fixed over at least part of its extent to said substantially cylindrical peripheral surface of said support in such a manner that said ring is deformable in the radial direction toward said shaft to reduce the maximum stresses exerted on said ring during a starting operation, and
- said ring is fixed to said support only in peripheral fixing sectors regularly distributed around the axis of said support, leaving free diametrically opposed sectors corresponding to compression areas and/or diametrically opposed sectors corresponding to expansion areas.
2 more elements
An internal combustion engine flywheel comprising:
- a support connected to an output shaft of an internal combustion engine and a starter toothed ring adapted to cooperate with a rotor of a starter motor of said internal combustion engine,
- said support having a peripheral part which receives said ring and includes a substantially cylindrical peripheral surface for fixing said ring to said support, and
- said ring having an inside peripheral part which is fixed to said support and includes a substantially cylindrical inside peripheral surface complementary to said peripheral surface of said support, wherein
- said complementary substantially cylindrical peripheral surface of said ring is fixed over at least part of its extent to said substantially cylindrical peripheral surface of said support in such a manner that said ring is deformable in the radial direction toward said shaft to reduce the maximum stresses exerted on said ring during a starting operation, and
- said peripheral surface of said support has a recess in at least one of:
- the area of each diametrically opposed sectors corresponding to compression areas, and
- the area of each diametrically opposed sectors corresponding to expansion areas.
4 more elements
A flywheel assembly for an internal combustion engine comprising:
- a metallic flywheel having a substantially cylindrical outside peripheral surface;
- and
- a metallic starter toothed ring having a substantially cylindrical inside peripheral surface,
- wherein at least a first portion of said outside peripheral surface of said flywheel engages said inside peripheral surface of said toothed ring by metal-to-metal fixation, and
- a second portion of said outside peripheral surface of said flywheel is spaced from said inside peripheral surface of said toothed ring to create a gap therebetween, said gap permitting radial deformation of said toothed ring during a starting operation.
2 more elements
Dependencies are inferred from the claim text.