Toyota Jidosha Kabushiki Kaisha

Jumpei Shioda

Masakazu Tabata

Shinichi Tsuji

An internal combustion engine includes an exhaust pipe having an interior through which exhaust gas flows, a pressure delivery pipe connected to the exhaust pipe, an interior of the pressure delivery pipe communicating with the interior of the exhaust pipe, a pressure sensor connected to the pressure delivery pipe, the pressure sensor detecting a pressure of the interior of the exhaust pipe, and a fastener that fixes the pressure delivery pipe to the exhaust pipe. A part of the fastener is exposed in the interior of the exhaust pipe.

Exhaust structure for internal combustion engine

A catalyst device includes a catalyst support, a tubular portion, which accommodates the catalyst support, a holding mat, which holds the catalyst support, an insulator provided over the outer circumferential surface of the tubular portion, and a heat insulating member arranged between the insulator and the tubular portion. The region of the outer circumferential surface of the tubular portion between the upstream end and the downstream end in the exhaust gas flowing direction is divided into two subregions arranged in a direction of the axis of the tubular portion. Of the two subregions, the subregion on the upstream side is defined as an upstream subregion, and the subregion on the downstream side is defined as a downstream subregion. The area that is covered with the heat insulating member in the downstream subregion is smaller than the area that is covered with the heat insulating member in the upstream subregion.

Catalyst device

A supercharger-equipped internal combustion engine in the present invention includes a turbo-supercharger () which includes, at some point in an intake passage (), a centrifugal compressor () having an impeller section () for housing a compressor impeller (). In the supercharger-equipped internal combustion engine, EGR gas and blow-by gas are introduced into an intake system in such a way as to flow into the centrifugal compressor () via an EGR gas introduction section () and a blow-by gas introduction section (). The supercharger-equipped internal combustion engine further includes a partition wall () which guides the EGR gas and the blow-by gas toward the centrifugal compressor () so that the EGR gas and the blow-by gas are not mixed with each other until the EGR gas and the blow-by gas enter into the impeller section ().

Supercharger-equipped internal combustion engine

A compressor has a hub-side wall of a hub-side wall plate, a shroud-side wall that faces the hub-side wall and forms a diffuser path between the shroud-side wall and the hub-side wall, vanes that protrude from the hub-side wall plate into the diffuser path, and an actuator capable of changing the distance between the vanes and the shroud-side wall in accordance with a flow rate of air in the diffuser path. Adjacent ones of the adjacent vanes do not overlap with each other when viewed from a center axis of the compressor. When the actuator maximizes the distance between the vanes and the shroud-side wall, the distance between the vanes and the shroud-side wall is smaller than the distance between the hub-side wall and areas of the shroud-side wall that face the vanes.

Centrifugal compressor

A compressor includes plural first vanes provided on a shroud side of a diffuser path, and plural second vanes provided on positions of a hub side opposed to the first vanes. The compressor also includes a slide vane mechanism that projects the second vanes into and draws in the second vanes from the diffuser path via the slits of the hub side wall part plate according to a load of the compressor. When the slide vane mechanism projects the second vanes into the diffuser path, end faces of the first vanes and end faces of the second vanes are opposed to each other at the vicinity of the center of the diffuser path.

Growing community of inventors

Susono, Japan

Jumpei Shioda