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    Piston for a heat engine, heat engine comprising such a piston, and methods
    2.
    发明授权
    Piston for a heat engine, heat engine comprising such a piston, and methods 有权

    公开(公告)号：US11098674B2

    公开(公告)日：2021-08-24

    申请号：US16477232

    申请日：2018-01-10

    Applicant: H.E.F.

    Inventor： Fabrice Prost ,  Christophe Heau ,  Romain Montelimard

    IPC: F02F3/00 ,  F16J1/02 ,  F16J9/00

    Abstract: Various implementations include a combustion engine piston, including a skirt in a counter-part and including a first contact area of the piston in the counter-part, a head which extends transverse to a central axis, and a ring carrier which comprises at least two lands and at least two grooves for receiving the rings, including a first land adjoining the head and a second land situated between the first land and the skirt, wherein the lands include at least one contact land having a diameter greater than a minimum diameter of the skirt to form a second contact area of the piston in the counter-part, and wherein at least one contact land comprises a friction-reducing surface coating, formed at least on a radial sector covering an angle of at least 30 degrees, and up to on a single sector covering an angle of 360 degrees.

    Multimaterial powder with composite grains for additive synthesis
    3.
    发明授权
    Multimaterial powder with composite grains for additive synthesis 有权

    公开(公告)号：US11111400B2

    公开(公告)日：2021-09-07

    申请号：US16331908

    申请日：2017-09-08

    Applicant: H.E.F.

    Inventor： Constantin Iacob ,  Sébastien Bucher ,  Fabrice Prost ,  Christophe Heau

    IPC: C09D11/037 ,  B01J13/02 ,  B33Y70/00 ,  B22F1/00 ,  C09D11/102 ,  B22F9/04

    Abstract: Some embodiments are directed to a multimaterial powder used in the field of metallurgy and plasturgy. The multimaterial powder includes support particles having a median particle size distribution between 1 μm and 100 μm and functionalising particles having a median particle size distribution that is a factor of 10 to 1000 lower relative to the support particles. The powder is characterised in that the support particles and the functionalising particles form composite grains having a core-shell structure that each have a core formed by a support particle, and a shell, that covers between 10 and 100% of the surface of the support particle and which is formed by at least one surface layer of the functionalising particles.

    Method for coating the nose of the cams of a camshaft with DLC, camshaft obtained in this way and facility for implementing said method
    8.
    发明授权
    Method for coating the nose of the cams of a camshaft with DLC, camshaft obtained in this way and facility for implementing said method 有权

    公开(公告)号：US10683777B2

    公开(公告)日：2020-06-16

    申请号：US15319644

    申请日：2015-06-10

    Applicant: H.E.F.

    Inventor： Sandrine Henry ,  Christophe Heau

    IPC: F01L1/16 ,  F01L1/047 ,  F16H53/02 ,  C23C16/02 ,  C23C16/04 ,  C23C16/26

    Abstract: A cam treatment to reduce the friction coefficient thereof relative to a counterpart in an area provided with a hard coating made from amorphous Diamond-Like Carbon or DLC, involves disposing the cams on a support, bringing the support and the cams into a chamber placed under vacuum so as to clean the cams, bringing the support into relative movement along a trajectory of travel relative to a coating source, and taking the cams off the support before assembling them on a camshaft; the method involves disposing the cams on the support in a fixed configuration which is defined in such a way that the cams are brought successively opposite the source with orientations and at distances substantially identical relative to the source, to deposit a hard coating made from amorphous Diamond-Like Carbon or DLC, selectively on the fraction of the section of the cams that is oriented towards the source.

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