Abstract: 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.

Abstract: A variable displacement oil pump includes: a variable displacement mechanism that is able to change a discharge amount per rotation of an input shaft. The variable displacement mechanism includes a pump housing, an oil pressure chamber provided in the pump housing, and a capacity adjustment member displaced by oil pressure from the oil pressure chamber. The capacity adjustment member is configured to be operated when receiving control oil pressure that is supplied from a control valve to the oil pressure chamber. The pump housing has an oil release hole that is opened to face the oil pressure chamber and that penetrates a wall section of the pump housing to partially release oil.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An oil supply apparatus supplies oil from an oil pump driven by an engine preferentially to a valve timing control unit. In the oil supply apparatus, a first discharge opening and a second discharge opening having an opening area larger than that of the first discharge opening are formed such that a pressurized region of the oil pump is divided into the two discharge openings. The oil from the first discharge opening is fed to a controlling oil passage through a first discharge port and then supplied to the valve timing controller from the controlling oil passage. The oil from the second discharge opening is fed to a lubricating oil passage through the second discharge port and then supplied to a main gallery from the lubricating oil passage.

Abstract: An oil pump includes a capacity adjustment mechanism that changes the pump capacity by moving a tubular body in a tube radial direction, with a pump chamber formed between the tubular body and an outer circumference side of a rotor, a first spring biasing the tubular body in a direction in which pump capacity increases, a control valve that converts oil pressure of the oil pump into control pressure and causes the control pressure to act on the capacity adjustment mechanism, and a second spring biasing a valve body in order to set the control pressure in the control valve. The relationship of the biasing forces of the first and second springs is set so that pump capacity is set to maximum when the engine rotational speed is less than a predetermined value, and so that pump capacity is reduced when the engine rotational speed exceeds a predetermined value.

Abstract: An oil supply device for a vehicle includes an oil pump driven by a rotation of an internal combustion engine, a hydraulic actuator to which oil is supplied from the oil pump, an engine lubricating system to which the oil is supplied from the oil pump, an oil supply adjusting valve adjusting a supply condition of the oil from the oil pump to the hydraulic actuator and the engine lubricating system, a first oil supply passage supplying the oil from the oil pump to the hydraulic actuator, and a second oil supply passage supplying the oil from the oil pump to the engine lubricating system, wherein the oil supply adjusting valve consistently distributes the oil to the first oil supply passage and the second oil supply passage.

Abstract: 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 A1 with a radius RA1 and a tooth root curve A2 with a radius RA2, a circle D1 has a radius RD1 satisfying Formula (1), and a circle D2 has a radius RD2 satisfying both Formulas (2) and (3): RA1>RD1>RA2 ??Formula (1) RA1>RD2>RA2 ??Formula (2) RD1?RD2 ??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 D1 or, in a radially inner direction, on the inner side of the circle D2.

Abstract: An oil supplying apparatus for a vehicle, includes an engine driven mechanical oil pump, a hydraulic actuator operated by pressure of oil supplied from the engine driven mechanical oil pump to the hydraulic actuator, an engine lubrication device lubricating each member of the engine with the oil supplied from the engine driven mechanical oil pump, and a priority flow valve selectively establishing priority flow and secondary flow conditions when a low oil pressure is working on the hydraulic actuator and when a high oil pressure is working on the hydraulic actuator, respectively, the priority flow condition allowing an oil supply from the engine driven mechanical oil pump to the hydraulic actuator with priority over an oil supply from the engine driven mechanical oil pump to the engine lubrication device, the secondary flow condition allowing the oil supply from the engine driven mechanical oil pump to the engine lubrication device.

Abstract: An oil pump includes a capacity adjustment mechanism that changes the pump capacity by moving a tubular body in a tube radial direction, with a pump chamber formed between the tubular body and an outer circumference side of a rotor, a first spring biasing the tubular body in a direction in which pump capacity increases, a control valve that converts oil pressure of the oil pump into control pressure and causes the control pressure to act on the capacity adjustment mechanism, and a second spring biasing a valve body in order to set the control pressure in the control valve. The relationship of the biasing forces of the first and second springs is set so that pump capacity is set to maximum when the engine rotational speed is less than a predetermined value, and so that pump capacity is reduced when the engine rotational speed exceeds a predetermined value.

Abstract: 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.

Abstract: A hydraulic control device includes a first predetermined portion receiving the oil discharged from a pump, a first channel establishing communication between the pump and the first predetermined portion, a second channel branched from the first channel for supplying oil to a second predetermined portion, a flow passage area regulation unit arranged on the second channel and equipped with a spool that moves in a flow passage area increasing direction when an oil pressure in the second channel increases and in a decreasing direction when the oil pressure decreases, and a bypass channel, which is provided separately from a portion of the second channel where the spool disconnects the second channel, establishes communication between an upstream side and a downstream side of the second channel relative to the flow passage area regulation unit and supplies oil to the second predetermined portion even when the spool disconnects the second channel.

Abstract: 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 A1 with a radius RA1 and a tooth root curve A2 with a radius RA2, a circle D1 has a radius RD1 satisfying Formula (1), and a circle D2 has a radius RD2 satisfying both Formulas (2) and (3): RA1>RD1>RA2 ??Formula (1) RA1>RD2>RA2 ??Formula (2) RD1?RD2 ??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 D1 or, in a radially inner direction, on the inner side of the circle D2.

Abstract: 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.

Abstract: An oil supply device for a vehicle includes an oil pump having a supply condition varying mechanism varying a supply condition of oil, a hydraulic actuator to which the oil is supplied from the oil pump, a lubricating system to which the oil is supplied from the oil pump, and an oil supply adjusting mechanism adjusting the supply condition of the oil from the oil pump to the hydraulic actuator and the lubricating system, wherein the supply condition of the oil to the supply condition varying mechanism and the oil supply adjusting mechanism is controlled by a single control valve.

Abstract: An oil supply device for a vehicle includes an oil pump driven by a rotation of an internal combustion engine, a hydraulic actuator to which oil is supplied from the oil pump, an engine lubricating system to which the oil is supplied from the oil pump, an oil supply adjusting valve adjusting a supply condition of the oil from the oil pump to the hydraulic actuator and the engine lubricating system, a first oil supply passage supplying the oil from the oil pump to the hydraulic actuator, and a second oil supply passage supplying the oil from the oil pump to the engine lubricating system, wherein the oil supply adjusting valve consistently distributes the oil to the first oil supply passage and the second oil supply passage.

Abstract: 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.

Abstract: 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.

Abstract: 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.