Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Aisin Seiki Kabushiki Kaisha

Nippon Soken, Inc.

Nippondenso Co., Ltd.

Fujitsu Ten Limited

Aisin Corporation

Toyota Jidohsa Kabushiki Kaisha

Noboru Takagi

Rihito Kaneko

Masaaki Yamaguchi

Hirokazu Ando

Zenichiro Mashiki

Haruyuki Urushihata

Yasumichi Inoue

Naoto Hisaminato

Isao Takagi

Hirotaka Watanabe

Hiroyuki Mizuno

Yoshihito Moriya

Yoshihiro Furuya

Masanao Idogawa

Naohide Fuwa

Senji Kato

Hirokazu Kato

Kiyoo Hirose

Daichi Yamazaki

Keizo Hiraku

Koji Nunami

Naoto Yumisashi

Hisashi Ono

Hirohiko Yamada

Takeshi Wakisaka

Tadashi Nakagawa

Toshio Takaoka

Kenji Kimura

Kunihiro Iwatsuki

Toshihiko Igashira

Mitsuru Takada

Kenji Kasashima

Takashi Ohta

Toshiki Sato

Hideo Tomomatsu

Koichi Yonezawa

Takayuki Demura

Masahiko Asano

Akihiko Takenaka

Masayuki Kishida

Jun Takahashi

Kiyohiko Watanabe

Shinichiro Ito

Masaomi Inoue

Masaaki Kaneko

Eiji Isobe

Yuuichi Takemura

Kenichi Komuro

Mitsuru Yamaguchi

Shoichi Akiyama

Takahiko Aoyagi

Masahiro Yoshida

Osamu Hosokawa

Yoshinobu Uchiyama

Masafumi Yoshida

Hidetoshi Onoda

Yusuke Kamijo

Hirohisa Kishi

Eiichiro Kido

Hirokazu Andoh

Takayuki Hosogi

Takamitsu Mizutani

Masazumi Yoshida

Naoshi Sugesawa

Hirokazu Tanaka

Takahide Kyuuma

Ryusuke Sasaki

Takayuki Inohara

Tadao Hasegawa

Akito Onishi

Satoru Onozawa

Takashi Matsutani

Shigeo Kikori

Masahiro Yamashita

Yuji Miyanoo

Yuki Nishida

Hajime Nomura

Katsuhiko Kodama

Toshikazu Tanaka

Yukikazu Ito

Naoya Kawamoto

Katsutoshi Tanei

Hiromitsu Seo

Yoshiyuki Yamashita

Masayoshi Hattori

Yoshihiro Okuda

Hiroshi Hosoi

Takeo Miyoshi

Shinya Wakabayashi

Daisuke Okanishi

Kazuki Kato

Takashi Yui

Shingo Okazawa

Michitaka Yamamoto

Hisayuki Ito

Kazuyoshi Shimatani

Daisuke Toyama

Yasunobu Toyoda

Hachirou Sasakura

Minoru Okimura

Control circuitry executes an increase correction control for fuel when an internal combustion engine is started. A determination process determines whether warm-up in a cylinder is completed. A direct injection mode injects fuel only from a direct injection valve when it is determined that the warm-up in the cylinder is completed. A reduction process sets an increase correction amount of fuel obtained through the increase correction control when executing the direct injection mode to be less than an increase correction amount obtained prior to the execution of the direct injection mode.

Controller for internal combustion engine, control method for internal combustion engine, and memory medium

A cooling device for an internal combustion engine is provided. The cooling device includes a first passage connected to the internal combustion engine and circulating a coolant, a second passage connected to the internal combustion engine and circulating the coolant, a heat exchanger provided on the first passage and configured such that heat exchange is performed with respect to the coolant, a first pump provided on the first passage, a second pump provided on the second passage and an electronic control unit controlling the first pump and the second pump. The electronic control unit, when a temperature of the coolant is no lower than a predetermined temperature, drives the first pump such that a flow rate of the coolant in the first passage increases as compared to when the temperature of the coolant is lower than the predetermined temperature, and performs first control of stopping the second pump.

Cooling device for internal combustion engine and cooling method of internal combustion engine

A controller includes: a control unit configured to calculate a control command value of an opening degree of a solenoid valve to control an opening degree of the solenoid valve; and an acquisition unit configured to acquire an estimated amount and a target amount of a working fluid in a labyrinth chamber, and a rotation speed of a drive shaft. The control unit calculates a final control command value based on a feedback control command value and a feedforward control command value, and controls the solenoid valve, the feedback control command value being calculated based on deviation between the estimated amount and the target amount, the feedforward control command value being used to maintain a rotation speed of a fan constant based on the estimated amount and the rotation speed of the drive shaft.

Controller of fan coupling device

A controller of a fan coupling device includes: an acquisition unit that acquires an acceleration parameter and a deviation parameter; a control unit that controls a regulation mechanism; a prediction unit that predicts that hunting occurs in the rotation speed of the fan, when an operating point of the fan expressed with the deviation parameter and the acceleration parameter belongs to a predicted region; and a restraining unit that executes, when the hunting is predicted to occur, a hunting restraining process of executing at least one of lowering an integral gain of a feedback control to be lower than when the hunting is not predicted to occur and increasing a derivative gain of the feedback control to be higher than when the hunting is not predicted to occur.

A controller includes: an acquisition unit that acquires a deviation between an estimated amount and a target amount of a working fluid in the labyrinth chamber, and a fluid amount parameter corresponding to the estimated amount; and a control unit that executes feedback control including at least integral control of the deviation so as to control a regulation mechanism. When the fluid amount parameter is equal to or greater than a threshold, the control unit executes the feedback control in a state where the integral control is stopped.

A cooling apparatus for an internal combustion engine includes a pump, a radiator, a flow rate adjustment valve, a bypass passage, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a valve member biasing component that biases the valve member in a valve-closing direction in which the open degree decreases. The valve member rotates in a valve-opening direction in which the open degree increases when a pressure difference increases between positions upstream and downstream of the valve member in a flow direction of coolant in the circulation circuit and rotate in the valve-closing direction when the pressure difference decreases. The controller increases the pump discharge amount as a target radiator flow rate that is a target of an amount of coolant passing through the radiator increases.

Cooling apparatus for internal combustion engine

A cooling apparatus includes a circulation circuit, a pump, a flow rate adjustment valve, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a stopper that moves between a restriction position and a retraction position. The controller is configured to execute, when maintaining the open degree of the flow rate adjustment, a preparatory process of moving the stopper to the restriction position after arranging the stopper at the retraction position and arranging the valve member further in the valve-closing direction than the stopper through control of the pump discharge amount.

A cylinder head includes an exhaust port through which exhaust gas discharged out of a combustion chamber of an internal combustion engine passes. The cylinder head includes a first fin and a second fin projecting from an inner wall of the exhaust port and extending in a flow direction of the exhaust gas. The cylinder head includes a first projection projecting from the inner wall of the exhaust port and extending in a direction intersecting the first fin. The cylinder head also includes a second projection projecting from the inner wall of the exhaust port and extending in a direction intersecting the second fin.

Cylinder head

An engine cooling device has a mechanical water pump, a flow rate control valve having a valve body of which a relative rotational position is changed by a motor, and a control unit that performs drive control of the motor to change the relative rotational position of the valve body to a target relative rotational position. The control unit performs protection control for setting the relative rotational position where a withstanding pressure limit rotational speed is equal to or higher than a current engine rotational speed, as a target operating position of the valve body of the flow rate control valve when the engine rotational speed rises, and performs retreat control for reducing a set range of the target relative rotational position to a prescribed retreat operation range when the supply voltage of the in-vehicle electric power supply has dropped.

Engine cooling device

A control device for an onboard engine is configured to control the oil discharge pressure of an oil pump and execute, when determining that there may be an abnormality in the control of the oil discharge pressure, a change process that increases the target discharge pressure to a value that is greater than that before it is determined that there may be an abnormality in the control. When a discharge pressure sensor value in a situation in which the discharge pressure is being controlled based on the target discharge pressure increased through execution of the change process does not become greater than or equal to a discharge pressure threshold, the control device sets an upper limit for the engine rotation speed and increases the upper limit as the discharge pressure sensor value increases.

Control device and control method for onboard engine

A cooling device includes an inner passage, an outer passage, an engine-driven pump, an electromagnetic control valve, and a driving circuit that regulates current flowing through the electromagnetic control valve by activating and deactivating a switching element. A cooling controller for the cooling device includes a processing circuit configured to execute an operation process for operating, when the engine-driven pump is driven, the switching element by setting a duty cycle of an activation time to a switching cycle, which is a reciprocal of a switching frequency of the switching element, to be a larger value when a temperature of the internal combustion engine is low than when the temperature is high and a cycle varying process for setting a longer switching cycle when the temperature of the internal combustion engine is less than a preset temperature than when the temperature is greater than or equal to the preset temperature.

Cooling controller and control method for cooling device

A cooling system of an internal combustion engine includes an adjustment valve configured to adjust a flow rate of a cooling liquid discharged from a water jacket. A controller for the cooling system includes circuitry configured to execute flow-restriction control that controls the adjustment valve to restrict discharge of the cooling liquid from the water jacket, thereby increasing temperature of an engine body. The circuitry is configured to execute the flow-restriction control so that temperature of the cooling liquid in the water jacket at which the flow-restriction control is terminated is lower when an ambient pressure is low than when the ambient pressure is high.

Controller for cooling system of internal combustion engine

A flow passage device includes a circulation flow passage, a swing valve provided in the circulation flow passage, an energizing part, and a lock mechanism including a lock pin. The lock pin is configured so as to hinder the swing valve from opening, and to allow the swing valve to open. The swing valve is configured so as to rotate from a first valve position to a second valve position. The lock mechanism is configured so as to set a locked state and to set an unlocked state. The lock pin is configured so as to protrude as being energized by pressure of the fluid on an upstream side of the swing valve, and to retract as being energized by pressure of the fluid on a downstream side of the swing valve.

Flow passage device and engine cooling system

An internal combustion engine includes a water jacket, a cooling water pump as a cooling liquid pump, and an adjusting valve. A control device for the internal combustion engine executes the water stoppage control of increasing the temperature of the engine body by limiting the discharge of the cooling liquid from the water jacket by the adjusting valve, and an automatic stop and automatic startup control of automatically stopping and automatically starting the internal combustion engine. The control device increases the fuel injection amount for automatically starting the internal combustion engine in a case where the water stoppage control is being executed when the internal combustion engine is automatically stopped as compared with a case where the water stoppage control is not being executed when the internal combustion engine is automatically stopped.

Control device for internal combustion engine

A coolant circuit of an engine cooling apparatus includes a first passage where coolant flows through a radiator and a second passage where coolant flows without passing through the radiator. A coolant control valve controls a first passage flow rate Frad and a second passage flow rate Fsec. An outlet coolant temperature sensor detects an outlet coolant temperature Tout, which is a coolant temperature before a branching point of the first passage and the second passage. An inlet coolant temperature sensor detects an inlet coolant temperature Tin, which is a coolant temperature after a merging point of the first passage and the second passage. A coolant temperature estimator calculates a radiator coolant temperature Trad, which is a coolant temperature at a coolant exit of the radiator, when the first passage flow rate Frad is greater than or equal to a specified flow rate using equation (1). 

Engine cooling apparatus

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Toyota, Japan

Noboru Takagi