Denso Corporation

Nippon Soken, Inc.

Other

Toyota Jidosha Kabushiki Kaisha

Yoshihiro Nakase

Akimitsu Sugiura

Kenji Kanehara

Shinichi Okabe

Yuya Abe

Tokio Kohama

Tohru Yoshinaga

Fumiaki Aoki

Masaki Takeyama

Takanobu Kawano

Hideaki Ichihara

Yoshinori Yamashita

Koichi Sugiyama

Toshio Imamura

Katsuyuki Tanaka

Yukio Tomiita

Hidekazu Oomura

Kenichi Yamamoto

Kouzi Ohara

Yoshihiro Miyaji

Katsuhiko Aoyama

Yoichi Sugiura

Takanori Suzuki

A barrier discharge ignition apparatus has a tip end exposed to a combustion chamber of an internal combustion engine and, when subjected to a high-frequency high-voltage AC burst, generates streamer discharges for igniting a fuel/air mixture in the combustion chamber. A central electrode of the apparatus, covered by a dielectric layer and coaxially enclosed in a ground electrode, extends into the combustion chamber to a greater distance than the ground electrode. An electrode portion close to the tip end of the inner periphery of the ground electrode protrudes towards the dielectric layer, for creating a localized high-density electric field. The streamer discharges thereby enter both the to combustion chamber and also a discharge chamber of the ignition apparatus.

Barrier discharge ignition apparatus for internal combustion engine

An ignition system for an internal combustion engine includes a discharge portion of the center electrode in which a part thereof is surrounded by a bottom portion and a tubular tip portion of the center dielectric, the part of the discharge portion and the tubular tip portion are projected into a combustion chamber of the internal combustion engine from a substantially annular tip portion of the ground electrode that opens to the combustion chamber at a distal end of the ground electrode, a diameter-changing portion formed by reducing a diameter of a part of the tubular tip portion in a radial direction gradually as approaching toward a tip thereof, and a thin-walled portion formed by reducing a thickness of the tip of the tubular tip portion.

Ignition system

A cylinder of an internal combustion engine is communicated with intake ports. Each of intake valves and each of fuel injection valves are provided to a corresponding one of the intake ports to inject fuel into a combustion chamber through a curved portion and an opening of the corresponding intake port. An injection axis of each fuel injection valve intersects with a surface of the corresponding intake valve placed in a close position at an intersecting point that is located on an upstream side of a central axis of the corresponding intake valve.

Internal combustion engine

A damping chamber is formed in a pressure relaxation device connected to a high pressure fuel pipe. Valve bodies are provided at openings of partitions, and a spring force is applied to the valve bodies by a spring in a valve closing direction. When a high pressure portion reaches an inlet of the damping chamber, the valve body opens to hold and absorb the high pressure portion in the damping chamber. When a low pressure portion reaches the inlet of the damping chamber, the high pressure portion held in the damping chamber is gradually released via a restricted orifice to cancel the low pressure portion, thereby reducing the pressure pulsation of fuel.

Fuel supply system for relieving fuel pressure pulsations and designing method thereof

An apparatus for preventing flow noise which suppresses the noise caused at the time of opening of a throttle valve provided in an intake passage of an internal combustion engine etc. At the downstream side of a pair of clearances formed at the top and bottom when the throttle valve opens, a means is provided acting on the flows of air passing through at least one of the clearances to reduce the flow rate and acting on the flows to cause the point of convergence of the flows of air passing through the pair of clearances to shift to the downstream side.

Apparatus for preventing flow noise in throttle valve

Growing community of inventors

Okazaki, Japan

Yoshihiro Nakase