Abstract: Device intended to allow a user to adopt a seated rest position, the device comprising at least an upper portion for maintaining the head and a lower supporting portion, the upper portion for maintaining the head comprising an upper opening suitable for receiving the face of the user, the lower supporting portion allowing the device to be kept bearing on a support, the device bearing on the support being suitable for supporting the weight of the head of the user, the device also comprising at least two lateral openings allowing the user to position the arms of the user under the upper portion for maintaining the head.

Abstract: A piston for an internal combustion engine, for example a diesel engine, including a body defined laterally by a skirt configured to interact with walls of a cylinder having a revolution axis C in which the piston can slide along axis C, the piston including a front face that includes a central lug, a peripheral crown, and a bowl having a revolution axis B extending from the central lug to the peripheral crown to which it is connected at a lip having a thickness Ep. The bowl includes substantially over the lip a torus, for example having a half-dome profile, with a maximum radius Rt and capable of guiding a fuel injected under the lip in a region of a re-entrance zone R towards the central lug, wherein the central lug has separate upper A1 and lower A2 slopes, the upper slope A1 being more gentle than the lower slope A2.

Abstract: A device for distributing the exhaust gas from a motor vehicle engine in the direction of a component. The device includes: a gas inlet port and a gas outlet port that open onto a same first plane; an inlet port and an outlet port to the component, which open onto the same second plane that is parallel to the first plane; and a rotary mechanism disposed between the first and second planes, to enable the gas to flow in a first direction and in an opposite second direction. A cooling device can include such a device.

Abstract: An engine including a cylinder including a sliding piston with a combustion bowl associated with an off-center injector. The injector sprays fuel in a conical injection pattern form having an apex and is formed by asymmetrical jets that travel different lengths before coming into contact with an inner wall of the bowl. The wall includes a groove centered on a main axis and connected to a base from which a boss extends. The boss includes: a lower cone frustum including a base included in a horizontal plane of the base and centered on the main axis of symmetry, having an apex as the symmetrical point of the apex of the injection pattern in relation to the main axis of symmetry; and an upper cone frustum including a base formed by an upper horizontal face of the lower cone frustum, having an apex corresponding to the injection pattern apex.

Abstract: A device for distributing the exhaust gas from a motor vehicle engine in the direction of a component. The device includes: a gas inlet port and a gas outlet port that open onto a same first plane; an inlet port and an outlet port to the component, which open onto the same second plane that is parallel to the first plane; and a rotary mechanism disposed between the first and second planes, to enable the gas to flow in a first direction and in an opposite second direction. A cooling device can include such a device.