Denso Corporation

Tomonari Chiba

Kazuhide Kawai

Yoshimi Nakase

Kazutoyo Oosuka

Norihiro Adachi

Tetsuya Miwa

Hiroyuki Wakabayashi

Kinya Takahashi

Keisuke Kawano

Masahiko Aoyama

Tatsuhiko Imaizumi

Katsuhisa Kato

Naruhiko Inayosi

Akimitsu Sugiura

Yoshitaka Sato

Keiichi Okazaki

Hideki Kawamura

Shinsuke Ido

Tomonori Ishikawa

Akimitsu Suguira

Hiromitsu Oonishi

A vane rotor is rotatably placed in an inside of a housing. A lock pin, which is placed in an inside of a receiving hole of the vane rotor, is insertable into a fitting hole formed in a rear plate. A second pressure chamber formed in the fitting hole is communicated with an advancing chamber. An air discharge hole communicates between the second pressure chamber and the atmosphere in a state where the lock pin is inserted into the fitting hole. The air discharge hole blocks communication between the second pressure chamber and the atmosphere in a state where the lock pin is removed from the fitting hole.

Valve timing control apparatus

A valve timing adjusting apparatus for an engine comprises a housing unit and a vane rotor rotatably housed in the housing unit. The housing unit comprises a front plate, a shoe housing and a sprocket, wherein those elements are fixed to each other. A position determination pin is inserted through a through hole formed in the shoe housing and into a tapered hole formed in the sprocket, to position the shoe housing at a desired position with respect to the sprocket. Since a forward end of the position determination pin is brought into contact with an inner surface of the tapered hole, the positioning of the shoe housing with respect to the sprocket can be surely attained.

Valve timing adjusting apparatus

An outer bottom of an engaging member, which is formed as a tubular shape having a bottom, is contact with an inner wall of a housing existing in the opposite direction of a fitting direction. The engaging member urges and covers one edge of an urging member. As a result, pressure, which the inner wall of the housing receives, can be decreased comparing with the structure, in which the urging member is directly in contact with the inner wall of the housing.

Valve timing controller

A stick-type ignition coil have a central core, a cylindrical member, primary spool, primary coil, secondary spool, secondary coil, outer core and a resin insulator. The two longitudinal end corners and faces of the core are covered by respective buffer members. The inner circumferential corners of the outer core is supported by ring members. Some of the members disposed radially inside and other members disposed radially outside of the inside members are held slidably to each other in the ignition coil. The spools are made of resin containing a rubber in excess of 5 weight percent and reinforcing materials. The resin insulator contains a flexible material.

Stick-type ignition coil having improved structure against crack or dielectric discharge

A valve timing adjusting apparatus comprises a first rotating body adjusting the opening/closing timing of the intake valves, and a second rotating body adjusting the opening/closing timing of exhaust valves. A first and a second driving force transmitting members respectively have first and second endless members for power transmission. The peripheral shape of the second rotating body comprises a circumferential shape portion and cutoff shape portions whose distance from the center of rotation is smaller than the circumferential shape portion's. When the first and second rotating bodies are assembled to an internal combustion engine, the cutoff shape portions are positioned in such a rotation angle position that the first endless member for power transmission can be inserted into the gap between the first and second rotating bodies.

During a multiple discharges operation, a micro computer changes a discharge period of each discharge in accordance with a pressure transition in a combustion chamber of an internal combustion engine. Thus, the energy amount consumed at each discharge of multiple discharges operation is suppressed toward the minimum requirement, and the consumption of energy accumulated in the ignition device is appropriately controlled. As a result, discharge energy is efficiently consumed at the multiple discharges, thereby compacting the ignition device. Further, the number of multiple discharges is not restricted.

Ignition and injection control system for internal combustion engine

During a multiple discharges operation, a micro computer changes a discharge period of each discharge in accordance with a pressure transition in a combustion chamber of an internal combustion engine. Thus, the energy amount consumed at each discharge of the multiple discharges operation is suppressed toward the minimum requirement, and the consumption of energy accumulated in the ignition device is appropriately controlled. As a result, discharge energy is efficiently consumed at the multiple discharges, thereby compacting the ignition device. Further, the number of multiple discharges is not restricted.

A high voltage post terminal is accurately located within a support aperture during manufacturing processes by at least one inwardly directed projection to avoid assembly problems caused by sizing the entire aperture itself to locate the terminal with sufficient accuracy. By thus improving the concentricity of the high voltage coil components it is possible to achieve more reliable insulation between components at even relatively small-sized coils used for individual engine plug holes. An especially advantageous range of critical parameters has been discovered as achievable by using this more reliable manufacturing process.

Growing community of inventors

Nishikamo-gun, Japan

Tomonari Chiba