Toyota Jidosha Kabushiki Kaisha

Nippon Gasket Company, Ltd.

Kazuaki Sugimura

Hiroshi Uemura

Yoshikazu Shinpo

Kazuya Nakata

Masahiko Miura

Kazukuni Takada

Kazukuni Takata

An internal combustion engine has a one-way clutch including a ring gear connected to the output shaft of a starting motor, an outer race member connected to a crankshaft, and a claw piece arranged between the outer circumferential surface of the ring gear and the inner circumferential surface of the outer race member facing the outer circumferential surface of the ring gear. The ring gear and the outer race member have a threaded hole and a through hole, respectively, to receive a jig for fixing the ring gear and the outer race member to each other.

Internal combustion engine and method for assembling internal combustion engine

In a bearing metal fitted to a journal bearing portion where a center of a bearing metal fitting hole is deviated from a reference straight line in a direction orthogonal to the reference straight line at a time of mounting a cylinder head, a thickness, in a direction parallel to a direction in which the center of the bearing metal fitting hole is deviated, of one of an upper metal and a lower metal, which is positioned in the same direction as the direction in which the center of the bearing metal fitting hole is deviated, is increased by an amount by which the center of the bearing metal fitting hole is deviated from the reference straight line, and a thickness, in the direction parallel to the direction in which the center of the bearing metal fitting hole is deviated, of one of the upper metal and the lower metal, which is positioned in a direction opposite to the direction in which the center of the bearing metal fitting hole is deviated, is reduced by the amount by which the center of the bearing metal fitting hole is deviated from the reference straight line.

Crankshaft bearing

This metal gasket comprises a beaded base plate, an intermediate plate and a thin plate, and secures a stable long-standing sealing performance with a face-to-face pressure balance kept properly. This metal gasket is provided with full beads on the beaded base plate, stopper beads on the intermediate plate, and folded portions, which hold the edge portions of bores of the intermediate plate, and full beads, which are laminated on the stopper beads on the intermediate plate, on the thin plate. The folded portions are formed so that they are not laminated on the stopper beads when the metal gasket is in practical use, i.e., when the folded portions are in a compressed condition. The folded portions and stopper beads display a stopper function of preventing the full compression of the full beads on the beaded base plate, and a sealing function of preventing the entry of a combustion gas into the clearances defined by the full beads. The face-to-face pressure occurring on the folded portions, stopper beads and full beads can be controlled properly, and the face-to-face pressure balance can be maintained properly.

Laminated metal gasket for a cylinder block of an engine

In this metal gasket, the beads formed on an intermediate plate prevent a full compression of bead plates and improve the sealability of the gasket. This metal gasket comprises first and second bead plates having main beads extending along the circumferences of holes, and an intermediate plate interposed between the first and second bead plates. The intermediate plate is provided in the regions thereof which are between the holes and the main bead-contacting portions thereof with beads opposed to the first bead plate, and these beads form compensating portions for the first bead plate. The second bead plate is provided with auxiliary beads having projecting portions engageable with the recessed portions of the beads on the intermediate plate. The compensating portions mentioned above prevent a full compression of the beads on the bead plates when the metal gasket is tightened, and offset the irregularity of the opposed surfaces of a cylinder head and a cylinder block. The auxiliary beads improve the sealability of the second bead plate with respect to the compensating portion-carrying intermediate plate.

Growing community of inventors

Toyota, Japan

Kazuaki Sugimura