Motor vehicle starter pinion with improved acoustic performance
AssigneeValeo Equipements Electriques Moteur
InventorGuy Faucon
Life of this patent
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Abstract
The invention relates mainly to an assembly comprising: —a combustion engine ring gear having a plurality of teeth, the said ring gear being defined by a modulus and a pressure angle, —a starter comprising a pinion (31) able to engage with the said ring gear of the said combustion engine, the said pinion (31) having a plurality of teeth (42) is defined by a modulus (Mp) and a pressure angle (alpha_p), characterized in that a pinion product which is the product of the modulus (Mp) of the said pinion (31) and the cosine of the pressure angle (alpha_p) of the said pinion (31) is greater than a ring-gear product equal to the product of the modulus of the said ring gear and the cosine of the pressure angle of the said ring gear.
Claims9
An assembly comprising:
- a ring gear of a thermal engine with a plurality of teeth, the ring gear being defined by a modulus and a pressure angle;
- a starter comprising a pinion which can engage with the ring gear of the thermal engine, the pinion having a plurality of teeth being defined by a modulus and a pressure angle,
- wherein a pinion product which is the product of the modulus of the pinion and the cosine of the pressure angle of the pinion is greater than a ring gear product equal to the product of the modulus of the ring gear and the cosine of the pressure angle of the ring gear, and
- wherein, for a ring gear product of 2.070, the pinion product is between 2.079 and 2.084.
An assembly comprising:
- a ring gear of a thermal engine with a plurality of teeth, the ring gear being defined by a modulus and a pressure angle;
- a starter comprising a pinion which can engage with the ring gear of the thermal engine, the pinion having a plurality of teeth being defined by a modulus and a pressure angle,
- wherein a pinion product which is the product of the modulus of the pinion and the cosine of the pressure angle of the pinion is greater than a ring gear product equal to the product of the modulus of the ring gear and the cosine of the pressure angle of the ring gear, and
- wherein, for a ring gear product of 2.387, the pinion product is between 2.401 and 2.41.
An assembly comprising:
- a ring gear of a thermal engine with a plurality of teeth, the ring gear being defined by a modulus and a pressure angle;
- a starter comprising a pinion which can engage with the ring gear of the thermal engine, the pinion having a plurality of teeth being defined by a modulus and a pressure angle,
- wherein a pinion product which is the product of the modulus of the pinion and the cosine of the pressure angle of the pinion is greater than a ring gear product equal to the product of the modulus of the ring gear and the cosine of the pressure angle of the ring gear, and
- wherein, for a ring gear product of 2.415, the pinion product is between 2.425 and 2.431.
Dependencies are inferred from the claim text.