Toyota Jidosha Kabushiki Kaisha

Yusuke Nozaki

Yuki Haba

Kohei Yoshida

Eiichi Ono

Yuki Bisaiji

Takao Fukuma

Eiichi Yasuda

Teruhiko Miyake

Akio Matsunaga

Masanori Shimada

Yasuo Harada

Yoshito Nogi

Kazukata Takei

Masahiko Mizuno

Mitsuteru Kokubun

Noriyoshi Terazawa

Eiichi c/o KK Toyota Chuo Kenkyusho Ono

Kazukata c/o KK Toyota Chuo Kenkyusho Takei

Mitsuteru c/o KK Toyota Chuo Kenkyusho Kokubun

Noriyoshi KK Toyota Chhuo Kenkyusho Terazawa

Eiichi c/o KK Toyota Chuo Kenkyusho Yasuda

Masahiko c/o KK Toyota Chuo Kenkyusho Mizuno

In an internal combustion engine, an exhaust purification catalyst and a hydrocarbon feed valve are arranged in an exhaust passage. When a temperature of the exhaust purification catalyst falls in a first catalyst temperature region (I), a first NOpurification method is performed, while when a temperature of the exhaust purification catalyst falls in a second catalyst temperature region (II), a second NOpurification method is performed. When the temperature of the exhaust purification catalyst falls in a region (IIP) in the second catalyst temperature region close to the first catalyst temperature region, the temperature of the exhaust purification catalyst is made to increase to shift the region in which the temperature of the exhaust purification catalyst falls to the first catalyst temperature region to thereby switch the NOpurification method used from the second NOpurification method to the first NOpurification method.

Exhaust purification device for internal combustion engine

In an internal combustion engine, a hydrocarbon feed valve () and an exhaust purification catalyst () are arranged in an engine exhaust passage. When releasing the stored NOfrom the exhaust purification catalyst (), usually combustion gas of a rich air-fuel ratio is generated in the combustion chamber () to make the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst () rich. When releasing the stored NOfrom the exhaust purification catalyst () in case where the temperature of the exhaust purification catalyst () is low, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst () is made rich by injecting hydrocarbons from the hydrocarbon feed valve ().

Exhaust purification system of internal combustion engine

In an internal combustion engine, a hydrocarbon feed valve and an exhaust purification catalyst are arranged in an engine exhaust passage. A first NOremoval method which reduces NOcontained in an exhaust gas by a reducing intermediate which is generated by injecting hydrocarbons from the hydrocarbon feed valve within a predetermined range of period and a second NOremoval method in which an air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made rich by a period which is longer than this predetermined range are used. The switching temperatures ST and STof the exhaust purification catalyst at which temperature an NOremoval method is switched from the second NOremoval method to the first NOremoval method, are made lower if the amount of NOin the exhaust gas flowing into the exhaust purification catalyst increases.

Exhaust purification system for an internal combustion engine

In an internal combustion engine, a hydrocarbon feed valve and an exhaust purification catalyst are arranged in an engine exhaust passage. A first NOX removal method which injects hydrocarbons from the hydrocarbon feed valve within a predetermined range of period so that the reducing intermediate generated thereby reduces the NOX contained in the exhaust gas and a second NOX removal method which makes the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst a first target rich air-fuel ratio by a period which is longer than this predetermined range are used. When the NOX removal method is switched from the second NOX removal method to the first NOX removal method, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst is made a second target air-fuel ratio which is smaller than the first target rich air-fuel ratio.

An internal combustion engine, wherein an exhaust purification catalyst () and a hydrocarbon supply valve () are arranged in an engine exhaust passage, the internal combustion engine being provided with a low-pressure exhaust gas recirculation device (LPL) for recirculating exhaust gas downstream of the exhaust air purification catalyst (). When a lock up clutch () in a torque converter () should engage, non-sliding engagement of the lock up clutch () is prohibited in a case where an exhaust gas recirculation action is performed by the low-pressure exhaust gas recirculation device (LPL) and hydrocarbons are sprayed from the hydrocarbon supply valve () at predetermined cycles.

Internal combustion engine

The present invention provides an acceleration sensation evaluating device that evaluates a sensory acceleration of a driver with respect to an expectation value of acceleration, and a vehicle controller that controls a vehicle according to the evaluation results. The evaluation device detects an amount of operation of the vehicle by the driver of when the vehicle is accelerated, detects an amount of vehicle behavior, computes a physical quantity of an expectation value indicating the expectation value of an acceleration performance which the driver expects based on the detected values, computes a sensory physical quantity indicating a sensation of the acceleration which the driver senses, and computes an evaluation value of the acceleration sensation based on difference or ratio between the physical quantity of the expectation value and the sensory physical quantity.

Acceleration sensation evaluating device and vehicle controller

Parameters for control of engine operation are operated for each operating state for establishment of compliance, whereby the output values are made compliance targets. This compliance operation is performed by first determining the adjustment sequences and adjustment directions for a plurality of parameters for reducing the output values exceeding the compliance targets and then sequentially operating these parameters in accordance with the determined adjustment sequence and in the determined adjustment direction.

Automatic compliance device, automatic compliance method, automobile, and storage medium

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Gotenba, Japan

Yusuke Nozaki