Aisin Seiki Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Aisin Corporation

Koji Nunami

Hisashi Ono

Rihito Kaneko

Noboru Takagi

Masaaki Yamaguchi

Hirokazu Kato

Hirotaka Watanabe

Naoto Yumisashi

Yuki Nishida

Masahiro Yoshida

Takahiko Aoyagi

Masafumi Yoshida

Hiroyuki Amano

Hirokazu Ando

Naoto Hisaminato

Takashi Iwaya

Masaki Kobayashi

Masanobu Matsusaka

Tadayoshi Sato

Katsuhiko Takasu

Shinji Kazaoka

Masaharu Hamasaki

Kentaroh Mochizuki

Matsusaka Masanobu

Sato Tadayoshi

Mochizuki Kentaroh

A fluid pump includes: three or more volume chambers that suction and discharge a fluid sequentially; moving elements that are respectively provided in the volume chambers, move relative to the volume chamber, and suction and discharge the fluid from and to the volume chamber; a cam that abuts against and drives the moving elements; and a driving section that drives at least one of the moving elements and the cam and relatively rotates the moving elements and the cam to discharge the fluid one time from each of the volume chambers in one cycle of the relative rotation, in which, when suctioning and discharging the fluid, regarding a discharge rotation angle &#x3b1;, &#x3b1;=(Z/M)&#xd7;N is satisfied, where the number of volume chambers is M and any integer from 2 to (M&#x2212;1) is N.

Fluid pump with cam geometry to reduce pulsations

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 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

A system for controlling valve opening/closing timing that allows an unlocking operation to be reliably performed is configured. When extracting a lock member from a recess, a second control valve is set to an unlock position, a first control valve is set to a predetermined position, and a relative rotation phase is displaced. As a result, the relative rotation phase is displaced in a direction opposite to the direction of displacement by cam average torque from a camshaft. Afterward, by setting the first control valve to a neutral position, the relative rotation phase is displaced by the cam average torque, and when this displacement occurs, a state in which the lock member is separated from an inner wall of the recess is created, thus facilitating extraction of the lock member from the recess.

System for controlling valve opening/closing timing

A valve opening/closing timing control device includes: an intermediate lock mechanism switchable between a locked state constraining a relative rotation phase to an intermediate locked phase, and an unlocked state releasing the constraint; a phase control unit controlling fluid supply to a retard chamber and fluid discharge from an advance chamber, or controlling fluid discharge from the retard chamber and fluid supply to the advance chamber, such that the lock member attains the intermediate locked phase; and a determination unit determining whether the lock member will attain the determination phase, when control has been performed to move the lock member toward a determination phase that has been set at a different position than the intermediate locked phase, after execution of control to either supply fluid to the retard chamber and discharge fluid from the advance chamber, or discharge fluid from the retard chamber and supply fluid to the advance chamber.

Valve opening/closing timing control device

A valve control mechanism is configured that is capable of optimally controlling an engine by lifting an intake valve only by the necessary amount, while suppressing noise at the time of operation. This valve control mechanism includes a control member that rotates around a control axis due to a driving force of an actuator, and a base end portion of a rocker arm is pivotably supported around a pivot axis by an eccentric support portion of the control member. The rocker arm is pivoted by a cam portion of a camshaft abutting against an intermediate roller of the rocker arm, and an operation of opening the intake valve is performed due to a pressure force from the pivot end. The rocker arm is shifted in the longitudinal direction due to an operation of the actuator, and control for changing the lift amount of the intake valve is performed.

Engine valve control mechanism

A lash adjuster is configured that reduces the impact at the time when a pressure force is exerted on a pressure-receiving effector, and reliably opens a valve by the necessary amount. This lash adjuster includes, in a relatively movable manner, the pressure-receiving effector that receives the pressure force and a relay effector that performs an operation of opening an intake valve, a pressure receiving-side damper space is formed at an insertion portion thereof, and an orifice portion is formed that suppresses an outflow of oil in the pressure receiving-side damper space when the pressure-receiving effector and the relay effector move in approaching directions. An abutting portion is formed that directly transmits the pressure force of the pressure-receiving effector to the relay effector when the pressure-receiving effector and the relay effector approach each other.

Lash adjuster

An oil pump includes: an inner rotor rotatable with a drive shaft in a unified manner on a drive-rotation axis; an outer rotor which has inner teeth configured to engage with outer teeth of the inner rotor and is rotatable about a driven axis eccentric to the drive-rotation axis; and an adjustment ring for rotatably supporting the outer rotor. A guide means which allows the adjustment ring to rotate about the driven axis, while allowing the driven axis to revolve about the drive-rotation axis, is formed of: first and second arm portions provided on the adjustment ring; and first and second guide faces with which the first and second arm portions are brought into slidable contact.

Oil pump including rotors that change eccentric positional relationship one-to another to adjust a discharge amount

An object is to provide a vehicle coolant control valve having excellent response, small size and weight, and low power consumption. A coolant stop valve (vehicle coolant control valve) valve comprises a valve body for controlling the flow of a fluid, the valve body having a magnetic body; a coil spring (urging device) for moving the valve body in the closing direction; a valve seat capable of coming in contact with the valve body; and a solenoid for moving the valve body in the closing direction; wherein the valve body is moved in the opening direction by fluid pressure of a fluid discharged from a water pump (pump) during operation of the water pump (pump), against the movement force of the coil spring (urging device) in the closing direction.

Vehicle coolant control valve

An oil pump rotor includes an inner rotor having (n) external teeth, an outer rotor having (n+1) internal teeth, and a casing forming a suction port and a discharge port for drawing/discharging fluid. In operation, fluid is drawn/discharged according to volume changes of cells formed between tooth faces. A tooth profile based on a mathematical curve has a tooth addendum circle Awith a radius Rand a tooth root curve Awith a radius R, a circle Dhas a radius Rsatisfying Formula (1), and a circle Dhas a radius Rsatisfying both Formulas (2) and (3):R&#x3e;R&#x3e;R&#x2003;&#x2003;Formula (1)R&#x3e;R&#x3e;R&#x2003;&#x2003;Formula (2)R&#x2267;R&#x2003;&#x2003;Formula (3)A tooth profile of the external teeth includes a modification either, in a radially outer direction, on the outer side of the circle Dor, in a radially inner direction, on the inner side of the circle D

Oil pump rotor

An oil pump rotor includes an inner rotor formed with n (n: a natural number) external teeth, and an outer rotor formed with n+1 internal teeth which are in meshing engagement with each of the external teeth. And the oil pump rotor is used in an oil pump that includes a casing having a suction port for drawing in fluid and a discharge port for discharging fluid and conveys the fluid by drawing in and discharging the fluid due to changes in volumes of cells formed between surfaces of the internal teeth and surfaces of the external teeth during rotations of the rotors under meshing engagement therebetween. And the tooth profile of the external teeth of the inner rotor is formed by a deformation in the circumferential direction and a deformation in the radial direction applied to a profile defined by a mathematical curve with the deformation in the circumferential direction is applied while maintaining the distance between the radius (R) of an addendum circle (A) and the radius (R) of the tooth groove circle (A).

An oil pump rotor for use in an oil pump includes an inner rotor having (n: 'n' is a natural number) external teeth, an outer rotor having (n+1) internal teeth meshing with the external teeth, and a casing forming a suction port for drawing a fluid and a discharge port for discharging the fluid, such that in association with meshing and co-rotation of the inner and outer rotors, the fluid is drawn/discharged to be conveyed according to volume changes of cells formed between teeth faces of the two rotors. For a tooth profile formed of a mathematical curve and having a tooth addendum circle Awith a radius Rand a tooth root curve Awith a radius R, a circle Dhas a radius Rwhich satisfies Formula (1) and a circle Dhas a radius Rwhich satisfies both Formula (2) and Formula (3),&#x2003;&#x2003;Formula (1)&#x2003;&#x2003;Formula (2)&#x2003;&#x2003;Formula (3)

An oil supplying apparatus includes a first oil path supplying working oil from an outlet port to a portion to be supplied with the working oil, a second oil path supplying the working oil to an oil pressure control valve, a relief oil path, and a valve body oil path. Depending on first, second, third, and fourth ranges of the oil pressure of the working oil in the first oil path, the working oil is supplied to the first oil path, is supplied to the first oil path and to the relief oil path via the valve body oil path, is directly supplied to the first oil path and is supplied to merge into the first oil path via the oil pressure control valve, and is supplied to the first oil path and to the relief oil path via the oil pressure control valve respectively.

Growing community of inventors

Obu, Japan

Koji Nunami