Toyota Jidosha Kabushiki Kaisha

Katsuhiro Ito

Tomoyuki Kogo

Koichiro Nakatani

Masaaki Sato

Akira Mikami

Tomoyuki Ono

Terutoshi Tomoda

Shinobu Ishiyama

Takashi Ogawa

Kazuhiro Umemoto

Shigemasa Hirooka

Daichi Imai

Shingo Korenaga

Yoshio Yamashita

Koichi Kitaura

Kazuyasu Iwata

Ryohei Ono

Hikaru Shiozawa

Masayoshi Nakagawa

Yoshihiro Hisataka

Hideyuki Tagami

Takashi Yasuma

Makoto Yamazaki

Yuto Ikeda

Keishi Takada

Koji Umezawa

Edgar Yoshio Morales Teraoka

Katsuji Harajiri

Michiyoshi Keta

Toru Saitou

Takeshi Kimura

Ryouhei Ono

Satoshi Ido

Yoshinori Yanase

Seiji Niwa

Yoshiyuki Mitsuya

Yoshiki Yanase

A controller and a control method for an internal combustion engine are provided. The internal combustion engine uses hydrogen as fuel. A base value of a fuel injection amount is calculated based on a requested torque. A smaller one of an upper limit value of the fuel injection amount and the base value is set as a target value. The upper limit value corresponds to an engine load factor. A NOx concentration difference is a difference between a NOx concentration in exhaust gas and a reference value for the NOx concentration. When the NOx concentration difference is greater than or equal to a threshold value, a relationship between the engine load factor and the upper limit value is corrected such that the upper limit value decreases.

Controller for internal combustion engine and method for controlling internal combustion engine

A control device starts supply of electric power to a catalyst device when a state of charge of a main battery decreases to a value which is equal to or less than an optimal power-supply state of charge set based on a travel load while a vehicle is traveling in an EV travel mode. The control device corrects input electric power of the catalyst device to a value less than the value at the time of starting of supply of electric power when the travel load decreases after the supply of electric power has been started.

Control device for hybrid vehicle

A control device is applied to an internal combustion engine equipped with an electric heating catalyst system provided with an EHC. The control device executes a preheating process to warm up an exhaust gas reduction catalyst prior to a start of the internal combustion engine by supplying electric power to the EHC, when the control device determines that a temperature of the exhaust gas reduction catalyst is lower than an activation temperature. The control device executes a determination process for determining whether water is adhered to a catalyst carrier. The control device starts the internal combustion engine without executing the preheating process when the control device determines by the determination process that water is adhered to the catalyst carrier, even when the control device determines that the temperature of the exhaust gas reduction catalyst is lower than the activation temperature.

Control device for internal combustion engine

A controller is applied to an internal combustion engine in which an electrically heated catalyst that is heated when supplied with electric power is installed in an exhaust passage. The controller is configured to perform a preheating process of warming up a first exhaust catalyst by supplying electric power to the electrically heated catalyst through control over a power supply before a start of the internal combustion engine. The controller is configured to, when an insulation resistance of the electrically heated catalyst at a start of the preheating process is lower than a threshold, perform the preheating process while decreasing a voltage supplied to the electrically heated catalyst.

Controller for internal combustion engine

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 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

Provided is a job plan display system capable of displaying a job plan on a product, and displaying a thumbnail as image information on the product on a display area of the job plan based on design data of the product, allowing an appropriate thumbnail to be displayed while suppressing an increase in system load. The job plan display system is configured to determine whether or not to display or update the thumbnail on a display area of the job plan based on at least one of intention of a designer who created the design data, such intention being assigned to the design data of the product, a predetermined update time, progress information on the design data created and a relationship between a changing part of the design data when the design data is changed and viewpoint coordinates when creating the thumbnail.

Job plan display system

An additive manufacturing apparatus includes a shaping part, a powder feeding part that feeds the powder material to the shaping part, a powder storage part that stores the powder material, and a pipe through which the powder material is transferred from the powder storage part to the powder feeding part. The powder storage part is arranged on a lower side of the powder feeding part in the vertical direction. The pipe is provided with a bent part in a transfer section in which the powder material is transferred from a lower side to an upper side in the vertical direction. The bent part stops the falling of the powder material that is present in the transfer section in the middle of the transfer section when the suction is stopped.

Additive manufacturing apparatus

Provided is a job plan creation system capable of creating an efficient job plan when the job plan is reconfigured on the basis of the progress of the jobs after the completion of the jobs that day and by the job starting time of the following day, for example. A job plan creation system extracts an interrupted job that has been started but has not been completed, a delayed job that should have been started based on the job plan but has not been started, and a not-started job that is scheduled to be started on the job plan and so has not been started from the job plan, and creates the job plan while setting priorities in the order of the interrupted job, the delayed job and the not-started job.

Job plan creation system

In an exhaust gas purification apparatus for an internal combustion engine which is provided with an NOx catalyst arranged in an exhaust passage of the internal combustion engine, the present invention has for its problem to be solved to suppress an increase in exhaust emissions, which results from processing for raising the temperature of the NOx catalyst, to a small level. In order to solve the above-mentioned problem, the exhaust gas purification apparatus for an internal combustion engine of the invention is constructed such that when an amount of increase in the NOremoval rate becomes smaller with respect to an amount of rise in the temperature of the NOx catalyst, the execution of temperature raising processing is deferred, and processing to make small the flow rate of exhaust gas discharged from the internal combustion engine and processing to make small the amount of smoke discharged from the internal combustion engine are executed.

Exhaust gas purification apparatus for an internal combustion engine

A control device includes: a first phase changing portion retarding a first intake valve phase relative to a second intake valve phase; a throttle valve adjusting an intake air amount of the engine, and a control portion configured to perform an intake valve phase control which controls the first phase changing portion to retard the first intake valve phase relative to the second intake valve phase such that an air amount in the cylinder of the engine is reduced to a target value to perform rich combustion, and the control portion configured to perform a throttle valve closing control which controls the throttle valve such that the air amount in the cylinder is the target value or smaller after the air amount in the cylinder is not reduced to the target value or smaller by the intake valve phase control performed by the first phase changing portion.

Control device for changing phase of multiple independent intake valves in engine

Disclosed is a technology that enables better reduction of NOx stored in an NOx catalyst in an exhaust gas purification system for an internal combustion engine. When NOx stored in an NOx catalyst is to be reduced, the air-fuel ratio of the ambient atmosphere around the NOx catalyst is decreased to a target air-fuel ratio by decreasing the air-fuel ratio of the exhaust gas discharged from the internal combustion engine. In doing so, if the temperature of the NOx catalyst is not lower than a specific temperature, the air-fuel ratio of the ambient atmosphere around the NOx catalyst is decreased to the target air-fuel ratio while bringing the combustion state into low temperature combustion. On the other hand, if the temperature of the NOx catalyst is lower than the specific temperature, the air-fuel ratio of the ambient atmosphere around the NOx catalyst is decreased to the target air-fuel ratio while decreasing the quantity of EGR gas in a cylinder so that the amount of generated smoke is kept within an allowable range.

Exhaust gas purification system for internal combustion engine

An object of the present invention is to provide a technology that enables reduction of NOx stored in an NOx catalyst with improved efficiency in an exhaust gas purification system for an internal combustion engine. According to the present invention, when NOx stored in the NOx catalyst is to be reduced, if the temperature of the NOx catalyst is lower than a specific temperature, the air-fuel ratio of the ambient atmosphere around the NOx catalyst is decreased only by decreasing the air-fuel ratio of the exhaust gas discharged from the internal combustion engine, and if the temperature of the NOx catalyst is not lower than the specific temperature, the air-fuel ratio of the ambient atmosphere around the NOx catalyst is decreased either only by adding reducing agent through reducing agent addition means, or by decreasing the air-fuel ratio of the exhaust gas discharged from the internal combustion engine and adding reducing agent through the reducing agent addition means.

Growing community of inventors

Mishima, Japan

Katsuhiro Ito