A roller-type rocker arm had a function for transmitting a rotational motion of a cam to an intake and exhaust valve. The roller-type rocker arm includes a roller shaft, an inner ring roller slidably attached to an outer circumference surface of the roller shaft, and an outer ring roller slidably attached to an outer circumference surface of the inner ring roller. The inner ring roller is made of a resin material.

Provided are a heat-resistant member provided with a heat-shielding coating suitable for stable manufacturing and excellent in heat-insulating, thermoresponsive and distortion accommodating properties, and a method for manufacturing the same. The heat-shielding coating includes a metallic portion formed of agglomerates of a plurality of metal particles, and inorganic compound particles dispersed in the metallic portion. The metal particles are diffusion-bonded each other, and the metallic portion and a base material of the heat-resistant member are diffusion-bonded each other. The manufacturing method includes the steps of depositing mixed particles of the metal particles and the inorganic compound particles on a surface of the base material in a film shape; resistance-heating the mixed particles by current-passing while pressurized in a thickness direction; diffusion-bonding the metal particles each other; and the metallic portion and the base material each other.

A cylinder head assembly for an internal combustion engine includes: a cylinder head defining a combustion chamber and having at least one opening communicating therewith; at least one port; at least one rotatable valve element disposed between the at least one opening and the at least one port; and at least one seal assembly disposed between the at least one rotatable valve element and the cylinder head, the seal assembly comprising a seal having a concave sealing face which conforms to a peripheral surface of the at least one valve element, a labyrinth seal disposed opposite the sealing face, and a resilient secondary seal disposed between the seal and the cylinder head.

A camshaft phaser has a stator configured to be non-rotatably connected to a drive sprocket and a rotor at least partially rotatable with respect to the stator and configured to be non-rotatably connected to a camshaft. The rotor has an aperture extending in a direction parallel to an axis of rotation. The camshaft phaser further has a support member including a bushing including an elongated portion, a flange, and a through-bore extending through the elongated portion and the flange, and a cylindrical pin disposed in the through-bore and the aperture. The camshaft phaser also has a positioning spring engaged with the support member and the stator to bias the rotor in a circumferential direction.

A structural member of a vehicle includes a metal body, a first resin layer and a second resin layer. The metal body is made of metal. The first resin layer is provided on the metal body in a layering direction and includes a first thermoplastic resin. The second resin layer is provided on the first resin layer in the layering direction and includes a second thermoplastic resin and carbon fiber.

A shaft assembly for a powertrain includes a shaft having a cavity extending at least partially from a first axial end to a second axial end of the shaft and opening at at least one of the first axial end and the second axial end. For example, the shaft may be a balance shaft, a camshaft, or a transmission shaft. A first core plug is disposed in the cavity. The shaft and the core plug may be the same material, or may be different materials. The shaft may have a first density, first cross-sectional area, or first area modulus, and the core plug may have a different second density, second cross sectional area, or second area modulus which may be less than the first density, the first cross-sectional area, or the first area modulus.

A composite vehicle shaft assembly includes a body formed from a first material having a first end, a second end, and an intermediate portion extending therebetween. The intermediate portion defines an axis of rotation and includes an outer surface and an inner surface defining a cavity. At least one core plug formed from a second material is disposed in the cavity.

A chain cover is configured to cover a timing chain that transmits rotation of a crankshaft of an internal combustion engine to a camshaft. The chain cover includes a crankshaft-side opening forming portion that defines a crankshaft-side opening into which the crankshaft is inserted, and a general portion that is a section different from the crankshaft-side opening forming portion. The crankshaft-side opening forming portion is made of a first material. The general portion is made of a second material. The first material and the second material are different from each other.

A valve stem seal is provided that can effectively prevent detachment from a valve guide. The valve stem seal comprises a metal ring provided with a tubular portion attached to an outer circumferential surface of an end portion of a valve guide, and a lip member provided with a sealing lip that is supported on the metal ring so as to be in tight contact with a valve stem passing through the valve guide, a cutout being provided in the tubular portion, and a tongue-shaped engaging piece being provided inside the cutout, the engaging piece protruding towards an engaging recess provided on the outer circumferential surface of the valve guide and engaging with the engaging recess in a detachment direction of the metal ring from the valve guide, wherein the engaging piece is formed so as to bend towards a radially inner side of the tubular portion at an area extending from a starting end of the engaging piece by a first length in the detachment direction, the first length being longer than a length, in an axial direction of the tubular portion, from the bent area to a tip of the engaging piece.

A drain port of a hydraulic oil controller is connected to an oil discharge portion. Each of partitions partitions between a corresponding one of drain oil passages and a corresponding one of a retard supply oil passage and an advance supply oil passage. Each of the drain oil passages connects between the oil discharge portion and a corresponding one of a retard chamber and an advance chamber. A recycle oil passage connects between: a portion of each drain oil passage located between the corresponding partition and the drain port; and the retard supply oil passage or the advance supply oil passage. A drain flow restrictor is formed in the portion of each drain oil passage located between the corresponding partition and the drain port. A passage cross-sectional area of the drain flow restrictor is smaller than a smallest passage cross-sectional area of the recycle oil passage and is constant.