Toyota Jidosha Kabushiki Kaisha

Sanyo Electric Co., Ltd.

Toyota Jidosha Kogyo Kabushiki Kaisha

Denso Corporation

Nippondenso Co., Ltd.

Kabushiki Kaisha Toyota Chuo Kenkyusho

Fujitsu Ten Limited

Jfe Steel Corporation

Hiroshi Sawada

Yasushi Iwazaki

Toru Kidokoro

Daisuke Shibata

Fumihiko Nakamura

Hiroshi Miyamoto

Keiichiro Aoki

Hiroki Matsuoka

Masahisa Fujimoto

Takayuki Demura

Hiroshi Kanai

Taiga Hagimoto

Michihiro Ohashi

Kouichi Osawa

Yukihiro Sonoda

Katsutoshi Takeda

Mitsuhiro Nada

Koichi Kimura

Kazuya Takaoka

Junichi Kako

Akihiro Katayama

Yusuke Suzuki

Kiyoshi Nakanishi

Toshio Inoue

Naoto Kato

Toshinari Nagai

Takashi Nakamura

Takahiro Uchida

Akira Tsujiko

Yusuke Nakayama

Yasuhiro Kuze

Yoshitaka Nakamura

Takuya Matsumoto

Koichi Kitaura

Tatehito Ueda

Hidehiro Oba

Shuntaro Okazaki

Shinichi Matsumoto

Yuji Miyoshi

Kazuhiro Wakao

Kazuhiro Sakurai

Kyo Hattori

Kenji Sakurai

Tsunenobu Hori

Kouichi Hoshi

Shinichiro Imamura

Hideyuki Koga

Masaya Kawaji

Tomitaro Hara

Chikaaki Okuda

Motoharu Saito

Sachie Yuasa

Yusuke Kawamura

Mamoru Mizutani

Keisuke Fukuoka

Osamu Hiruta

Yuichi Itou

Makoto Sato

Takahiro Joko

Keiji Imamura

Takahito Imamine

Tatsuya Tsuji

Masanobu Kanamaru

Yukihide Niimi

Keisuke Sano

Akira Ohata

Kimikazu Yoda

Takayuki Murata

Katsushi Anzai

Masatoshi Watanabe

Shinji Kojima

Hirotaka Saito

Toshimi Murai

Tsuyoshi Sasaki

Masashi Shibayama

Akira Iwai

Nobuo Nishiura

Masahiro Urushidani

Kenji Tashiro

Seietsu Yoshida

Satoshi Endo

Yuichi Ito

Yukio Kuroda

Naoki Baba

Takeho Aisaka

Takashi Matsui

Youji Takeuchi

Kiyoshi Asada

Sinji Kato

Yasuyuki Yokokawa

Satoru Maeda

Koji Yanagino

Kazuhiro Nitta

Ryouichi Harada

Katsunori Kawatake

Katsumi Suziki

Massao Ito

Akihiko Itakura

Masanori Ishida

Shinya Taira

The deterioration judgment for an absorption reduction type NOx catalyst () is performed quickly and correctly. A catalyst deterioration judging system comprises a supply unit () which supplies a reducing agent, a measuring unit () which measures a NOx concentration in an exhaust gas at a position downstream from the catalyst (), a control unit () which regulates an amount of the reducing agent so that an air-fuel ratio of the exhaust gas is a lean air-fuel ratio when the reducing agent is supplied from the supply unit (), and a judging unit () which judges deterioration of the catalyst () on the basis of the NOx concentration measured by the measuring unit () when the amount of the reducing agent is regulated so that the air-fuel ratio of the exhaust gas is the lean air-fuel ratio when NOx is absorbed by the catalyst ().

Catalyst deterioration judging system

The present invention is intended to provide a technique of improving exhaust emissions at the time of starting up of an internal combustion engine, without decreasing the performance of a catalyst at the time of the engine starting up. The present invention is provided with the catalyst that is arranged in an exhaust passage of the internal combustion engine in which a plurality of kinds of fuels are able to be used, and serves to adsorb and remove exhaust gas components discharged from the internal combustion engine, wherein in cases where among the plurality of kinds of fuels, a first fuel is used in which unburnt fuel components thereof are easily adsorbed to the catalyst, at the time when a request is made for stopping the internal combustion engine, said first fuel is changed to a second fuel thereby to operate said internal combustion engine until said internal combustion engine is stopped.

Control apparatus and method for an internal combustion engine

An engine control apparatus includes a stack detecting unit, a count processing unit, a stack value storage control unit, and an abnormality determination unit. The abnormality determination unit determines that a sensor has a stack abnormality when a count value by the count processing unit becomes equal to or more than an abnormality determination threshold. When maximum value of the detected value of the sensor detected during a determination period is lower than a value stored in a storage unit and a stack state has not been detected by the stack detecting unit during the determination period, the count processing unit does not count up a counter and does not reset the counter.

Engine control apparatus and control method for the same

A lithium-ion secondary battery with excellent durability is provided using a two-phase coexisting compound as a positive electrode active material. This lithium-ion secondary battery is provided with an electrode body having a positive electrode containing a positive electrode active material and a negative electrode containing a negative electrode active material, and a non-aqueous electrolyte solution containing a lithium salt in an organic solvent. The positive electrode active material is mainly composed of a two-phase coexisting compound containing lithium, and also contains particles of a lithium-transition metal oxide with a layered structure. The particles of the layered oxide have an average particle diameter of 2 &#x3bc;m or less, and the percentage content thereof in the positive electrode active material is 5 mass % or less.

Non-aqueous electrolyte solution type lithium ion secondary battery

An air-fuel ratio imbalance among cylinders determining apparatus (a determining apparatus) according to an aspect of the present invention, obtains a parameter X for imbalance determination which becomes larger as a variation of an air-fuel ratio of an exhaust gas passing through a position at which the air-fuel ratio sensor is disposed becomes larger, based on an output value Vabyfs of an air-fuel ratio sensor. At the same time, the determining apparatus changes a target air-fuel ratio which is a target value of an air-fuel ratio of a mixture supplied to an engine to 'an air-fuel ratio (a target rich air-fuel ratio AFrich or a target lean air-fuel ratio AFlean) other than a stoichiometric air-fuel ratio' from the stoichiometric air-fuel ratio. Accordingly, the determining apparatus can obtain the parameter X for imbalance determination in a state in which a responsivity of the air-fuel ratio sensoris not low. As a result, it can make a determination on the air-fuel ratio imbalance among cylinders with high accuracy.

Air-fuel ratio imbalance among cylinders determining apparatus for an internal combustion engine

A lithium ion secondary battery provided by the present invention has a positive electrode having a current collector and a positive electrode composite layer provided on the current collector. The current collector contains a metal element A as a main component thereof. The positive electrode composite layer contains a two-phase compound containing lithium as a positive electrode active material. The positive electrode composite layer also contains as an additive a compound having a metal element B, in a composition thereof, that has a higher ionization tendency than the metal element A.

Non-aqueous electrolyte lithium ion secondary battery

A NOx amount capable of being absorbed by a criteria catalyst as a boundary between degradation and normality is supplied to a NOx storage reduction catalyst and thereafter, a reducer amount corresponding to the NOx amount is supplied by a rich spike operation. Degradation of the NOx catalyst is determined based upon the output of the NOx sensor at this time. Since the degradation of the NOx catalyst is determined only by a magnitude of the NOx sensor output, the degradation diagnosis can be performed with high precision. While the catalyst is normal, the excessive reducers are not supplied and therefore, deterioration of the fuel consumption can be prevented.

Degradation diagnostic apparatus for NOx catalyst

An air-fuel ratio imbalance among cylinders determining apparatus according to the present invention obtains an output Vabyfs of an air-fuel ratio sensor disposed at a portion downstream of an exhaust gas aggregated portion of an exhaust gas passage, and obtains a second-order differential value d2AF (a change rate of a change rate of a detected air-fuel ratio abyfs) of a detected air-fuel ratio abyfs represented by the air-fuel ratio sensor output Vabyfs. The imbalance determining apparatus determines that an air-fuel ratio imbalance state among cylinders is occurring when a detected air-fuel ratio second-order differential corresponding value (for example, a second-order differential value d2AF per se) obtained in accordance with the second-order differential value d2AF is larger than a first threshold value.

Air-fuel ratio imbalance determining apparatus among cylinders for an internal combustion engine

A warm-up system for an exhaust system of an internal combustion engine includes an electronic control unit that performs warm-up control for warming up an exhaust system component upon start-up of the internal combustion engine and a failure diagnosis performing module of the electronic control unit that performs failure diagnosis for the exhaust system component after the completion of warm-up of the exhaust system component. If the internal combustion engine repeatedly stops before completion of the failure diagnosis for a predetermined period of time, then the electronic control unit changes the warm-up control performed upon start-up of the internal combustion engine to a control that raises the temperature of the exhaust system component more quickly than the warm-up control performed during the predetermined period.

Warm-up system for exhaust system of internal combustion engine

A judging device comprises a catalyst, an upstream air/fuel ratio sensor having an air/fuel ratio sensing element covered with a diffusion resistance layer, and a downstream air/fuel ratio sensor. The judging device performs main feedback control to equalize the air/fuel ratio indicated by the output value of the upstream air/fuel ratio sensor to an upstream target air/fuel ratio and sub-feedback control to equalize the output value of the downstream air/fuel ratio sensor to a downstream target value. The judging device acquires 'an imbalance judging parameter' which increases with 'the increase of the difference between the amount of hydrogen contained in the exhaust gas before the exhaust gas passes through the catalyst and that after the exhaust gas passes through the catalyst' according to the sub-feedback amount. When the imbalance judging parameter is larger than an abnormality judgment threshold, the judging device judges that an air/fuel ratio imbalance among the cylinders has occurred. The judging device does not make judgment on air/fuel ratio imbalance among the cylinders if a predetermined judgment prohibition condition is satisfied, for example, if the flow of the exhaust gas is a predetermined value or more.

Air-fuel ratio imbalance among cylinders determining apparatus for a multi-cylinder internal combustion engine

It is determined quickly whether there is a shortage in reducing agent supplied to an NOx selective reduction catalyst. After it is determined that a quantity of reducing agent equal to or larger than a predetermined quantity is absorbed in the NOx selective reduction catalyst on the assumption that there is no abnormality in reducing agent supply unit, the supply of a quantity of reducing agent needed to reduce a quantity of NOx flowing into the NOx selective reduction catalyst is started. A determination of an abnormality in the reducing agent supply unit is made based on the NOx removal rate after the lapse of a predetermined period of time since the start of the supply of reducing agent. The NOx removal rate becomes lower when there is an abnormality in the reducing agent supply unit.

Abnormality detection apparatus for exhaust gas purification apparatus and abnormality detection method for exhaust gas purification apparatus

The present invention is intended to detect a failure of a PM filter with a higher degree of accuracy. The present invention is provided with: a PM trapping efficiency calculation part to calculate a PM trapping efficiency (which is a proportion of an amount of particulate matter trapped with respect to an amount of inflow particulate matter) based on an amount of inflow particulate matter obtained by an inflow particulate matter obtaining part, and an amount of outflow particulate matter detected by a PM sensor; and a failure detection part to make a determination that a failure has occurred in the PM filter, in cases where there has appeared a tendency for the PM trapping efficiency to decrease during a period of time until the execution of the following filter regeneration processing is started after the completion of execution of the filter regeneration processing.

Failure detection apparatus and failure detection method for a particulate filter

An electronic control device calculates the maximum actual oxygen storage capacity of a catalyst. The gradient of a linear expression formed between the catalyst temperature and the maximum oxygen storage capacity of the catalyst is stored for each degradation level of the catalyst. The gradient can be learned in accordance with the same temperature of the catalyst and the maximum actual oxygen storage capacity. When the maximum actual oxygen storage capacity is calculated, it is revised in accordance with the temperature of the catalyst, a reference temperature, the linear expression, and the learned gradient. The revised maximum oxygen storage capacity which is the maximum oxygen storage capacity when the temperature of the catalyst during the same calculation period is equal to the reference temperature is then calculated. If a response delay is detected in the output of an oxygen sensor, the gradient of the learned linear expression is discarded.

Device for purifying exhaust gas of internal combustion engine

The present invention provides an engine system control device to be applied to an engine system provided with an engine having a variable compression ratio mechanism capable of changing a compression ratio. In the case where generation of failure in a compression ratio control system is detected, determination of a state of a member placed in an intake and exhaust system of the engine is inhibited.

Engine system control device

Provision is made for a catalyst that is arranged in an exhaust passage of an internal combustion engine and has an oxidation function, downstream side temperature detection means that detects the temperature of an exhaust gas at a downstream side from the catalyst, and addition means that adds a reducing agent into the exhaust gas from an upstream side from the catalyst, wherein there are also provided correlation value calculation means that calculates a correlation value which is correlated with an amount of change of the temperature detected by the downstream side temperature detection means when the reducing agent is added by the addition means and when a transient operation of the internal combustion engine is carried out, and determination means that determines a deterioration of the catalyst by making a comparison between the correlation value and a threshold value which indicates the deterioration of the catalyst.

Catalyst deterioration detection apparatus and catalyst deterioration detection method for internal combustion engine

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Gotenba, Japan

Hiroshi Sawada