Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Nippon Soken, Inc.

So-ken Corporation

Hamanakodenso Co., Ltd.

Shuhei Oe

Rihito Kaneko

Kenji Kasashima

Kenji Senda

Masatomo Yoshihara

Yuichi Takemura

Kiyoshi Iwade

Yuuichi Takemura

Koji Aso

Makoto Otsubo

Kuniaki Oka

Shigeru Kamio

Satoshi Masuda

Norihito Hanai

Nobuyuki Murate

Taketsugu Sasaki

Takehiro Tanaka

Jun Yamada

Hirohiko Yamada

Naoki Kokubo

Yasuhiro Yamasako

Shota Toda

Yuusuke Yasuki

Tomoaki Nakano

Toshiki Fujiyoshi

Kenichi Nara

Kouzi Ohara

Hikaru Kokumai

Masataka Nishikori

Yoshihito Moriya

Hiroshi Okada

Kengo Suzuki

Kengo Ito

Yuu Yokoyama

Motoyoshi Ando

Toru Takahashi

Takashi Ooga

Takashi Yamaguchi

Kazuhiro Sasao

Shigeru Maeda

Kosei Takagi

Motoyoshi Hatta

Yoshiki Endo

Yu Yokoyama

Masanori Sugiura

Hitoshi Noguchi

Takao Ishida

Haruhito Fujimura

Takashi Satoh

Seiichiro Washino

Yousuke Yamamoto

Hiroya Andou

Kazuaki Ueda

Yoshihiro Yamashita

Toshihisa Nakajima

Kazuhisa Hara

Kazuki Matsuo

Akira Okada

Kouji Ohara

Yusuke Kimura

Junji Ute

Hiroya Ando

Daigo Arakida

Toshikazu Mori

Shinya Nakata

Seiichirou Washino

Shoji Isogai

A dog clutch control system includes a dog clutch including a first engagement member and a second engagement member, an actuator, a rotational speed detecting unit, an arrival timing predicting unit, and a phase correcting unit. The arrival timing predicting unit predicts an arrival timing at which a rotational speed difference between the first engagement member and the second engagement member is adjusted to a value equal to or less than a predetermined threshold, based on the rotational speeds of the first and second engagement member and a time variation characteristic of the rotational speed difference during a rotational speed adjustment. The phase correcting unit performs a phase correction to bring an engageable timing, which is a timing at which the first engagement member is engageable with the second engagement member after the arrival timing, closer to the arrival timing compared to a case without the phase correction.

Dog clutch control system

A flow rate measuring device measures a flow rate of a main flow flowing through a duct. The flow rate measuring device includes a bypass passage, a flow rate sensor, and a measurement body. The measurement body includes a measurement flow inlet opening toward an upstream side of the duct and a cylindrical portion opening toward a downstream side of the duct. The cylindrical portion is disposed to cover the measurement flow outlet. The cylindrical portion includes an outer circumferential surface guiding the main flow and an inner circumferential surface guiding the measurement flow. The cylindrical portion includes a waveform portion formed in an edge side of an opening of the cylindrical. The waveform portion divides the main flow guided by the cylindrical portion into a plurality of main flows and divides the measurement flow guided by the cylindrical portion into a plurality of measurement flows.

Flow rate measuring device

A control device has two modes as control modes of an electric power supply to an electromagnetic solenoid, which are used when a first determining unit determines that a difference between a sensed value of a phase and a target value of the phase exceeds a permissible range. One of the modes is a special mode that is used when a second determining unit determines that the sensed value of the phase reaches a threshold value. Another one of the modes is a normal mode that is used when the second determining unit determines that the sensed value of the phase does not reach the threshold value. In the special mode, the control device controls supply of the electric power to the electromagnetic solenoid in such a manner that an opening degree of an advancing port is larger than the opening degree of the advancing port in the normal mode.

Variable valve timing apparatus

When a lock demand of a camshaft phase occurs, a control mode of a hydraulic control valve is switched to a locking mode after the camshaft phase is controlled to a lock phase, and a lock pin is moved to a lock position. The camshaft phase is locked at the lock phase, and timing advance and timing retard chambers communicate with each other through a back space. In this state, a locking time filling control is executed. In the locking time filling control, the control mode of a hydraulic control valve is switched to a filling mode, the hydraulic oil is supplied to a timing advance chamber, both of the timing advance chamber and the timing retard chamber are filled with the hydraulic oil, the back space is filled with the hydraulic oil, and thereafter the control mode of the hydraulic control valve is returned to the locking mode.

Variable valve timing control device for internal combustion engine

A control system for an internal combustion engine has an intake valve, an exhaust valve, and an exhaust purifying catalyst that purifies exhaust gas after combustion of a fuel. During a fuel cut in which no fuel is supplied, a closing timing of the intake valve is controlled to a delayed angle side more than at a timing when the fuel is supplied and to a delayed angle side more than at a timing at a bottom dead center of an intake stroke, and an opening timing of the exhaust valve is controlled to an advanced angle side more than at the timing when the fuel is supplied and to an advanced angle side more than at the timing at the bottom dead center of an expansion stroke.

Control system for internal combustion engine

In a solenoid of a hydraulic pressure control apparatus, a region adjacent to an oil flow guide portion of a stopper breathing passage is formed in a magnetism application region, through which a leakage magnetic flux leaking from a magnetic circuit at a time of turning on of a coil passes. Thereby, magnetic foreign objects made of iron or iron containing material are magnetically attracted to the leakage magnetic flux, so that intrusion of the foreign objects from an outside of the solenoid into a second volume variable chamber through the stopper breathing passage is limited.

Solenoid and hydraulic pressure control apparatus having the same

A power transmission system transmits power from an internal combustion engine to a first and a second auxiliary device through an endless transmitting member. Prior to issuing of an engine start request, the first auxiliary device is actuated to move a tensioner pulley to a given position to increase the degree of tension of the endless transmitting member. The actuation of the first auxiliary device as an engine starter upon the issuing of the engine start request, therefore, enables a drive shaft of the engine to be rotated immediately within a required time to crank the engine. This achieves a quick start of the engine and results in a decrease in amount of time between the issuing of the engine start request and the actual start of the engine.

Structure of power transmission apparatus

A vehicle controller performs a throttle-valve-late-close control in which the throttle valve is held open until a delay time has passed after the fuel cut is started, and an EGR-valve-open-close control in which the EGR valve is repeatedly opened and closed. Then, the throttle valve is closed and the EGR valve is opened. In a period from a latter period of an exhaust stroke to a preceding period of an intake stroke, a valve-overlap control is executed so that a variable valve timing controller is controlled to make both an intake valve and an exhaust valve opened. A pumping loss of an engine is sufficiently reduced and an energy-regenerate efficiency can be effectively improved.

Vehicle controller

A valve timing control apparatus includes a temperature sensing member which expands at a main lock phase when a temperature of an engine is higher than or equal to a predetermined temperature so as to prohibit a main lock component from moving out of a main lock hole to a guide slot. The temperature sensing member shrinks at the main lock phase when the temperature of the engine is lower than the predetermined temperature so as to allow the main lock component to move out of the main lock hole toward the guide slot.

Valve timing control apparatus

A main lock member is fitted in a main lock bore at a main lock phase for closing an intake valve at a timing later than a timing when a piston reaches a bottom dead center, whereby a rotation phase is locked. In a subordinate lock mechanism, the rotation phase is locked at a subordinate lock phase advancing further than the main lock phase. In a lock control mechanism, a temperature sensing body is changed to an expanded state, whereby a moving member is latched at a first position in which the main lock member is allowed to be fitted in the main lock bore, whereas at a main lock phase in a cold stop state after a timing when the temperature of the stopped internal combustion engine becomes less than a preset temperature, the temperature sensing body is changed to a contracted state.

Valve timing adjusting device

A valve timing control apparatus includes a housing that is rotatable with a crankshaft; a vane rotor that is rotatable with a camshaft; and a phase controller to compulsorily change a rotation phase of the vane rotor alternately between an advance side and a retard side with respect to the housing if an engine shifts to a high rotation state after the engine continuously has a low rotation state for a predetermined period or more. The engine in the low rotation state has a rotation speed lower than a predetermined rotation speed. The engine in the high rotation state has a rotation speed equal to or higher than the predetermined rotation speed.

A valve timing controller includes a lock mechanism that locks a rotation phase at a main lock phase when an internal combustion engine is started with an ambient temperature more than or equal to a preset temperature. The main lock phase represents a rotation phase set for closing an intake valve at a later timing later than a timing when a piston reaches a bottom dead center of a cylinder in the internal combustion engine. The lock mechanism locks the rotation phase at a sub lock phase representing a rotation phase advanced rather than the main lock phase in the internal combustion engine when the internal combustion engine is started with an ambient temperature lower than the present temperature.

Valve timing controller

A sealing structure has a permanent magnet and a magnetic-flux guiding member for guiding magnetic flux of the permanent magnet to a brake shaft of a brake rotating member. The magnetic-flux guiding member surrounds an outer periphery of the brake shaft so as to form a sealing gap around the brake shaft. The sealing gap is communicated to a fluid chamber, in which magnetic viscous fluid is filled. A fluid sealing member is provided at the brake shaft at a housing outer side of the magnetic-flux guiding member to form an intermediate fluid chamber, in which an intermediate fluid made of non-magnetic liquid is filled.

Hydraulic braking device and valve timing adjusting apparatus

A fluid brake device has a case defining a fluid chamber. Magneto-rheological fluid is contained in the fluid chamber. A brake member is rotatably supported on the case and receives a braking torque according to the viscosity of the magneto-rheological fluid. The device has a movable member driven by a thermo-sensitive wax so that a volume of the fluid chamber is increased as the temperature in the fluid chamber is increased. The movable member is driven to maintain a pressure in the fluid chamber within an allowable range when the temperature in the fluid chamber is changed.

Fluid brake device and variable valve timing apparatus

A fluid brake device has a rotor having a brake shaft penetrating a case to come into contact with magnetic viscosity fluid. A sealing sleeve is arranged to surround the brake shaft, and a seal gap is defined between the sealing sleeve and the brake shaft and communicates with a fluid chamber. The sealing sleeve has a flux guide that guides magnetic flux to the brake shaft through the seal gap. The brake shaft has a magnetic shaft extending in an axis direction, and a regulation layer that regulates the magnetic flux from passing by covering an outer circumference surface of the magnetic shaft. The brake shaft has an exposing part opposing to the magnetic flux guide, and the exposing part of the brake shaft is exposed from the regulation layer.

Growing community of inventors

Kariya, Japan

Shuhei Oe