Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Kabushiki Kaisha Toyota Jidoshokki

Akira Mikami

Shinya Hirota

Toshiaki Tanaka

Shunsuke Toshioka

Keishi Takada

Takamitsu Asanuma

Koichi Kimura

Kazuhiro Itoh

Shigeki Nakayama

Koichiro Nakatani

Junichi Matsuo

Nobumoto Ohashi

Hiroshi Otsuki

Yoshihisa Tsukamoto

Kenji Sakurai

Masaaki Sato

Katsuhiro Ito

Ichiro Yamamoto

Kazuhiro Umemoto

Daichi Imai

Koichiro Fukuda

Yasuaki Nakano

Ryohei Ono

Yoshimitsu Henda

Edgar Yoshio Morales Teraoka

Shizuo Sasaki

Hiroki Murata

Makoto Koike

Takanori Ueda

Ryoichi Hibino

Takekazu Ito

Takafumi Yamauchi

Toshio Suematsu

Masato Gotoh

Kohei Igarashi

Masatoshi Maruyama

Masakazu Sakata

Sakutaro Hoshi

Matsuei Ueda

Takashi Endo

Akira Shichi

Shota Fuchigami

Masaaki Satou

Ryouhei Ono

Akihiko Asano

Hiroyuki Nagareda

Katsuhiro Itou

Ryouhei Ohno

A vehicle power supply system includes a power storage device, a plurality of devices including a plurality of noise generators, and a power distribution circuit connecting the power storage device and the devices. Each of the noise generators is connected to the power distribution circuit via a noise filter. The noise filter includes a first impedance element and a Y capacitor provided closer to the noise generators than the first impedance element. The first impedance element provided for each of the noise generators is an impedance element having a shape and a material that increase a first system impedance of each of the devices to be higher than a predetermined lower limit impedance at least in an amplitude modulation band.

Vehicle power supply system

An exhaust emission control device for an internal combustion engine according to the present disclosure includes an exhaust emission control catalyst provided in an exhaust passage in an internal combustion engine and divided into a preceding catalyst and a succeeding catalyst, and a heating device provided in the exhaust passage between the preceding catalyst and the succeeding catalyst. The exhaust emission control catalyst is divided into the preceding catalyst and the succeeding catalyst so that a ratio of a capacity of the preceding catalyst to a total displacement of the internal combustion engine is from 0.3 to 1.5.

Exhaust emission control device for internal combustion engine

An exhaust gas purification apparatus for an internal combustion engine includes the adsorbent, the catalyst and the heat generating element, wherein in cases where the residual capacity of the battery is smaller than a first predetermined value required for raising the temperature of the catalyst to an activation temperature thereof, and in cases where the residual capacity of the battery is larger than a second predetermined value which is smaller than the first predetermined value and which is required for raising the temperature of the adsorbent to a predetermined temperature at which the adsorbent exhibits adsorption performance required at the time of starting of the internal combustion engine, an amount of electric power to be supplied to the heat generating element from the battery is adjusted such that the temperature of the adsorbent becomes the predetermined temperature.

Exhaust gas purification apparatus for internal combustion engine

A vehicle includes a filter disposed in an exhaust passage through which exhaust gas discharged from an internal combustion engine passes, the filter being configured to collect PM that is particulate matter contained in the exhaust gas; a PM removal control device configured to start execution of PM removal control that heats the filter to remove the PM accumulated on the filter while the internal combustion engine is stopped; and a determination device configured to determine whether a user of the vehicle is away from the vehicle. The PM removal control device is configured to start the execution of the PM removal control only when the determination device determines that the user of the vehicle is away from the vehicle.

Vehicle

A controller estimates a first estimated adsorption amount which is an amount of adsorption of ammonia in the SCR catalyst at the time when the SCR catalyst is assumed to be in a predetermined abnormal state, estimates a second estimated adsorption amount at the time when the SCR catalyst is assumed to be in a predetermined normal state, calculates a first slip development temperature based on the first estimated adsorption amount, and calculates a second slip development temperature based on the second estimated adsorption amount. The controller, when carrying out an abnormality diagnosis based on a concentration of ammonia in an exhaust gas at the downstream side of the SCR catalyst, carries out diagnostic temperature control so as to control the temperature of the SCR catalyst to a temperature which is equal to or more than the first slip development temperature and is less than the second slip development temperature.

Abnormality diagnosis system for an exhaust gas purification apparatus

When a user requests start-up of an internal combustion engine while PM removal control is in execution or immediately after execution of the PM removal control is completed, an electronic control unit informs the user of the vehicle of a first alarm, so that the user recognizes that the internal combustion engine cannot be started up immediately. This makes it possible to suppress the discomfort caused because the internal combustion engine is not started up.

Vehicle and control method for vehicle

An exhaust gas purification system comprises a first fuel supply unit to supply fuel to exhaust gas flowing in an exhaust passage by a supply valve arranged in the exhaust passage, and a second fuel supply unit to supply fuel to exhaust gas by adjusting a fuel injection condition, wherein in a temperature raising stage of the NOx SCR catalyst associated with the exhaust gas temperature raising processing, first control is performed in which fuel is supplied by the first fuel supply unit, and in a temperature holding stage of the NOx SCR catalyst associated with the exhaust gas temperature raising processing, at least second control is performed in which the ratio of an amount of fuel supply by the second fuel supply unit with respect to an amount of fuel supply by the first fuel supply unit becomes higher in comparison with that when performing the first control.

Exhaust gas purification system for an internal combustion engine

An exhaust gas purification apparatus for an internal combustion engine comprises: a selective catalytic reduction (SCR) catalyst selectively reducing NOx in an exhaust gas of the internal combustion engine using ammonia as a reducing agent; a supply device adding an additive agent, such as ammonia, to the exhaust gas at an upstream side of the SCR catalyst; and a controller, when a temperature of SCR catalyst is higher than a predetermined temperature, increases a NOx concentration of the exhaust gas flowing into the SCR catalyst and increases an amount of addition of the additive agent in such a manner that a ratio of an amount of ammonia with respect to an amount of NOx contained in the exhaust gas flowing into the SCR catalyst, becomes large, as compared to when the temperature is equal to or less than the predetermined temperature.

Exhaust gas purification apparatus for an internal combustion engine

An exhaust gas purification system for an internal combustion engine is provided with a filter including a selective catalytic reduction NOx catalyst carried thereon. Further, a post-catalyst is provided for an exhaust gas passage disposed on a downstream side from the filter. The post-catalyst has an oxidizing function, and the post-catalyst has such a function that the production of Nbased on the oxidation of ammonia is facilitated in a predetermined first temperature area. A filter regeneration process execution unit is programmed to control the temperature of the post-catalyst to be in the first temperature area while adjusting the temperature of the filter to be in a predetermined second temperature area lower than a filter regeneration temperature during a certain period of time.

Exhaust gas purification system for internal combustion engine

An object of the present invention is to appropriately remove, from an exhaust gas, HC, CO, and ammonia flowing out from a filter (SCRF) on which an SCR catalyst is carried. In the present invention, a post-catalystis provided for an exhaust gas passage of an internal combustion engine on a downstream side from SCRF along with a flow of the exhaust gas. The post-catalystis constructed to include an adsorption reduction partwhich adsorbs ammonia and which reduces NOx by using ammonia as a reducing agent, a first oxidation partwhich oxidizes ammonia, and a second oxidation partwhich oxidizes HO and CO.

An object is to suppress the occurrence of a failure in supply of urea water as much as possible in filling control of urea water in a pump share-type urea water supply system with two supply valves. In the pump share-type urea water supply system with a first supply valve and a second supply valve, a urea water tank is connected with the respective supply valves by a urea water supply path. The urea water supply path includes a first supply path for the first supply valve and a second supply path for the second supply valve. The second supply path has a larger capacity than the capacity of the first supply path by a predetermined volume. Filling control of urea water pressure-feeds urea water to the first supply valve and the first supply path by a pump operated in a specified operating state in a state that at least the first supply valve out of the first and second supply valves is opened, and closes the first supply valve based on a pressure value or a pressure variation per unit time obtained by an acquirer.

Urea water supply system

A pump share-type urea water supply system includes a first supply valve and a second supply valve. A urea water tank is connected with the respective supply valves by a urea water supply path that includes a first supply path for the first supply valve and a second supply path for the second supply valve. The second supply path has a larger capacity than the first supply path by a predetermined volume. A suck-back control controls opening and closing of the respective supply valves such that a first estimated valve-opening time of the first supply valve for suck-back control in the first supply valve and supply path is shorter than a second estimated valve-opening time of the second supply valve for suck-back control in the second supply valve and in-the-second supply path by at least a first control time corresponding to the predetermined volume.

In order to suppress ammonia from flowing out during regeneration treatment of a filter carrying an SCR catalyst, the prevent invention provides an exhaust emission control system of an internal combustion engine, including a first stage catalyst having an oxidation function, a fuel supply device configured to supply fuel to the first stage catalyst, a filter provided in the exhaust passage downstream of the first stage catalyst and carrying a selective redaction type NOx catalyst, an ammonia supply device configured to supply ammonia to the filter, a filter-regeneration-treatment executing unit configured to execute filter regeneration treatment, and a control unit configured to supply, when the filter regeneration treatment is not executed, the ammonia in an amount corresponding to an amount of the NOx emitted from the internal combustion engine, and to supply, when the filter regeneration treatment is executed, the ammonia in an amount corresponding to an amount of the NOx obtained by subtracting, from the amount of the NOx emitted from the internal combustion engine, an amount of the NOx reduced by the fuel which passes through the first stage catalyst.

Exhaust emission control system of internal combustion engine

In an exhaust gas purification system for an internal combustion engine provided with a filter supporting an SCR catalyst, the present invention is intended to suppress HC and CO from being discharged to the outside at the time of the execution of filter regeneration processing, and to carry out the filter regeneration processing in an efficient manner. In the present invention, a post-catalyst having an oxidation function is arranged in an exhaust passage at the downstream side of the filter. Then, when the temperature of the post-catalyst is lower than a predetermined activation temperature at the time the execution of the filter regeneration processing is requested, the temperature of the post-catalyst is raised by carrying out control of raising the temperature of the exhaust gas discharged from the internal combustion engine, and control increasing the flow rate of the exhaust gas, before the execution of the filter regeneration processing.

An exhaust gas control apparatus includes a control device controlling a urea addition valve for adding urea from an upstream side of a NOx reduction catalyst. The control device obtains an ammonia adsorption amount distribution through the NOx reduction catalyst. When an ammonia adsorption amount in a predetermined part on a downstream side equals or exceeds a predetermined threshold, the control device controls the urea addition valve to stop the urea supply or reduce the amount thereof. The urea addition valve is controlled based on an adsorption amount distribution obtained from a model on which the catalyst is divided into cells such that an ammonia adsorption amount in a first cell positioned furthest upstream equals or exceeds a predetermined threshold close to a saturation adsorption amount and an ammonia adsorption amount in a second cell positioned downstream of the first cell reaches a predetermined target value smaller than the threshold.

Exhaust gas control apparatus and control method for exhaust gas control apparatus

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Susono, Japan

Akira Mikami