Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Jidosha K.k.

Toyota Gosei Kabushiki Kaisha

Masao Yasukawa

Kiyoshi Nakanishi

Takeshi Okumura

Kazuhiko Ito

Isamu Iezuka

Takashi Ohta

Tomohide Aoki

Fumio Nomizo

Shuji Morita

Hiroya Fujita

Yukiyasu Taguchi

A composite intake manifold includes a first outer member, an inner member fitted within the first outer member, and a second outer member fixed to the first outer member. An intake port of the manifold includes a curved portion. The curved portion is defined by the inner member and at least one of the first outer member and the second outer member. The curved portion of the intake port is divided at a seam parallel to an axis of the curved portion of the intake port so that the respective members can be molded without using a molding core.

Composite intake manifold for an internal combustion engine

An evaporative fuel control canister for use in an internal combustion engine includes a canister main body having a vapor absorbing chamber and a liquid separate chamber. The vapor absorbing chamber has a first portion filled with a vapor absorbing material, and a second spatial portion. The liquid separate chamber has an expansible and contractible member containing a liquid absorbing material. The vapor absorbing chamber is adjacent to the liquid separate chamber in a ventilation state. The canister includes a vapor passage coupling a fuel tank and the liquid separate chamber, and a purge passage coupling the internal combustion engine and the liquid separate chamber. The purge passage has a first opening positioned in the expansible and contractible member, and a second opening positioned in the second spatial portion. The canister includes stopper members for maintaining a surface of the expansible and contractible member at a position which the extensible and contractible member does not reach the second opening so that the second spatial portion is always maintained.

Evaporative fuel control canister containing absorbent swelling by

A cylinder head for an automotive vehicle has an inner wall serving to define the roofs of combustion chambers, and an outer wall spaced outward therefrom. A coolant flow plenum is defined between the inner wall and the outer wall, and a coolant flow path is defined through the coolant flow plenum. A hole through a portion of the outer wall of the cylinder head opens to a portion of the coolant flow path which has a relatively large cross sectional area, and serves for extracting an inner casting sand core used to create the coolant flow plenum during casting of the cylinder head. A cup plug is fitted into the casting sand extraction hole so as to block it, and this cup plug projects inwards into the coolant flow plenum so as to constrict the large cross section portion of the coolant flow path and to deflect flow of coolant toward other portions of the cylinder head that require high cooling.

Cylinder head with inwardly projecting cup plug in casting sand

A gear assembly comprising two gears and a spring in the form of a C-shaped clip interconnecting the two gears. Two pins are provided on one of the two gears and the spring has two holes, one in each end thereof, whereby the spring can be carried by one gear in a prestressed state by means of the pin-and-hole connection. The other gear has a third pin thereon. The spring has a third hole into which the third pin is inserted. Thus the assembly work can be accomplished simply by resting the second gear on the first gear. An end of the third hole engages with the third pin to create a spring force necessary to provide nonbacklash mating with a third gear.

Gear assembly for mating with third gear without backlash

A gear assembly comprising two gears and a spring in the form of a C-shaped clip interconnecting the two gears. Two pins are provided on one of the two gears and the spring has two holes, one in each end thereof, whereby the spring can be carried by one gear in a pretressed state by means of the pin-and-hole connection. The other gear has a groove to cover the spring, thus the assembly work can be accomplished simply by resting the second gear to the first gear. An end wall of the groove engages with an end of the spring to create a spring force necessary to provide non-backlash mating with a third gear.

Gear assembly adapted for mating with a third gear without backlash

An internal combustion engine comprises a first raised portion formed on the inner wall of the cylinder head, a second raised portion formed on the top face of the piston at a position opposite to the first raised portion with respect to the axis of the piston, and a third raised portion formed on the inner wall of the cylinder head above the second raised portion. A first flat squish area is formed between the flat peripheral top face of the piston and the flat bottom face of the first raised portion. A second spherical shell shape squish area is formed between the spherical bottom wall of the third raised portion and the spherical rear face of the second raised portion. A surface area ratio of the sum of the first and second squish areas formed on the inner wall of the cylinder head and the first and second squish areas formed on the top face of the piston to the sum of the cross-sectional area of the cylinder bore and the surface area of the inner wall of the cylinder head, except for the surface area of the vertical side wall of the first raised portion, is in the range of 30 percent to 50 percent.

Combustion chamber of an internal combustion engine

An internal combustion engine comprises a first raised portion formed on the inner wall of the cylinder head, a second raised portion formed on the top face of the piston at a position opposite to the first raised portion with respect to the axis of the piston, and a third raised portion formed on the inner wall of the cylinder head above the second raised portion. A first flat squish area is formed between the flat peripheral top face of the piston and the flat bottom face of the first raised portion. A second spherical shell shape squish area is formed between the spherical bottom wall of the third raised portion and the spherical rear face of the second raised portion. A recess is formed on the top face of the combustion chamber and arranged on an extension of the second squish area. The spark plug is arranged in the recess.

An internal combustion engine comprises a first raised portion formed on the inner wall of the cylinder head, a second raised portion formed on the top face of the piston at a position opposite to the first raised portion with respect to the axis of the piston, and a third raised portion formed on the inner wall of the cylinder head above the second raised portion. A first flat squish area is formed between the flat peripheral top face of the piston and the flat bottom face of the first raised portion. A second spherical shell shape squish area is formed between the spherical bottom wall of the third raised portion and the spherical rear face of the second raised portion. The third raised portion has a steeply inclined side wall extending upwards from the ridge of the second raised portion. A depression having a vertically extending peripheral wall is formed in the central portion of the top face of the piston. The peripheral wall is aligned with the vertically extending side wall of the first raised portion.

An internal combustion engine comprises a first raised portion formed on the inner wall of the cylinder head, a second raised portion formed on the top face of the piston at a position opposite to the first raised portion with respect to the axis of the piston, and a third raised portion formed on the inner wall of the cylinder head above the second raised portion. A first flat squish area is formed between the flat peripheral top face of the piston and the flat bottom face of the first raised portion. A second spherical shell shape squish area is formed between the spherical bottom wall of the third raised portion and the spherical rear face of the second raised portion. The surface areas of the first squish area and the second squish area which are located near said exhaust valve are larger than those of the first squish area and the second squish area which are located near the intake valve.

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Toyota, Japan

Masao Yasukawa