Nippon Soken, Inc.

Other

Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Shigeki Daido

Naohisa Oyama

Mamoru Yoshioka

Shinya Hirota

Toshihiko Igashira

Toshiaki Tanaka

Kazuhiro Itoh

Yasuyuki Sakakibara

Koichiro Nakatani

Toru Yoshinaga

Takuji Matsubara

Kazuhide Watanabe

Shinji Tsuji

Ataru Ichikawa

Fumihiko Sato

Takayuki Takeuchi

Masahiro Takigawa

Yukihiro Natsuyama

Juji Suzuki

Takayuki Shibuya

Yoshihiko Hyoudo

Kodo Kawase

Hitoshi Kato

In an addition-amount controller for an exhaust gas purifying agent to be used for an exhaust emission control system, a catalyst has properties of storing NHand further decreasing the critical reaction temperature as an amount of NHstorage at the catalyst is increased. In the addition-amount controller, a present NHstorage amount that is a storage amount of NHof the catalyst is detected at a detection time, the NHstorage amount of the catalyst is changed by controlling an addition amount by an addition valve, and the NHstorage amount of the catalyst is controlled to a target NHstorage amount based on the detected present NHstorage amount.

Addition-amount controller for exhaust gas purifying agent and exhaust emission control system

A filterfor collecting PMs, a microwave transmitterfor emitting electromagnetic waves whose frequency is dozens of GHz-a few of THz onto the filter, a microwave receiverfor detecting an intensity of the electromagnetic waves that have transmitted through the filter, and a computing means for computing a collection amount of PMs from the intensity that has been detected with the microwave receiverare included. Since it is possible to detect the distribution of the collection amount of PMs with good accuracy, it is possible to carry out a recycling process in a state where the collection amount does not become too much, and thereby it is possible to make a reducing-agent supply amount into exhaust gases minimum at the time of the recycling process.

Collection-amount detection method for particulate matters and collection-amount detection apparatus therefor and exhaust-gas converting apparatus

Correction of a fuel injection amount in an internal combustion engine during purge of evaporative fuel is performed on the basis of an output from an intake-oxygen concentration sensor disposed in an intake passage of the internal combustion engine. If the amplitude of fluctuations in engine speed becomes equal to or greater than a predetermined value, it is determined that there is an anomaly in engine output. In addition, if an anomaly in engine output is detected during purge and if no anomaly in engine output is detected during stoppage of purge, an ECU determines that an anomaly has occurred in the intake-oxygen concentration sensor, cancels correction of the fuel injection amount based on an output from the intake-oxygen concentration sensor during purge, and corrects the fuel injection amount on the basis of outputs from exhaust-gas air-fuel ratio sensors.

Combustible-gas sensor, diagnostic device for intake-oxygen concentration sensor, and air-fuel ratio control device for internal combustion engines

A reducing agent for use in an internal combustion engine is a mixture of an ammonia-derived solid reducing material and a water-insoluble liquid in which the solid reducing agent is immersed. A reducing-agent supply device is provided for supplying a denitration catalyst with the reducing agent, such that the reducing agent is introduced into a portion of an exhaust passage of the internal combustion engine which is upstream of the denitration catalyst.

Reducing agent for emission control system, reducing-agent supply device, and emission control system using the reducing agent

A fuel injection system in which a fuel injector having a fuel pressure control chamber formed therein to create a pressure which forces a needle valve in the closing direction to open and close the nozzle hole, an accumulator to retain fuel discharged from the nozzle hole, and a fuel injector provided at each of the cylinders of the engine, are connected to the fuel injection pump by a single piping system without utilizing a special distribution mechanism. The volume of the fuel pressure control chamber in the fuel injector can be changed by a piezo-actuator. A check valve is provided at a half way point of the piping which leads the fuel fed under pressure from the fuel injection pump to the fuel injector into the fuel pressure control chamber and the accumulator, so that the fuel is fed through the check valve into the fuel pressure control chamber and the accumulator.

Fuel injector and fuel injection system

Growing community of inventors

Nishio, Japan

Shigeki Daido