Unisia Jecs Corporation

Hitachi Automotive Systems, Ltd.

Hitachi, Ltd.

Atsugi Unisia Corp.

Hyundai Motor Company

Nissan Motor Company Limited

Atsugi Motor Parts Company, Limited

Hitachi Unisia Automotive, Ltd.

Seiji Tsuruta

Tamotsu Todo

Hirokazu Uehara

Seinosuke Hara

Noriomi Hosaka

Makoto Nakamura

Mikihiro Kajiura

Yoshihiko Yamada

Shinichi Kawada

Takanori Sawada

Naoki Kokubo

Masaharu Saito

Nobutaka Hayashi

Noboru Egashira

Kenji Suzuki

Hiroyuki Kato

Seiji Suga

Atsushi Yamanaka

Hyung Ick Kim

Masaki Toriumi

Hong Wook Lee

Akio Akasaka

Masaharu Kitamura

Kotaro Watanabe

Hiroaki Imai

Kenji Ariga

Yoshinori Ichinosawa

Katsuhiko Uchida

Shin Koizumi

Bonghoon Han

Takashi Hirano

Isao Doi

Akira Torii

Yasuo Fukuda

Hideaki Onishi

Tadashi Kikyohara

Jaechun Kim

Sadayuki Abo

Harunobu Okabe

Manabu Katayama

Hirokazau Uehara

A valve timing control apparatus of an internal combustion engine may include a driving rotational body to which torque is transmitted from a crankshaft, a driven rotational body fixed to a camshaft to which torque is transmitted from the driving rotational body, an electric motor disposed between the driving rotational body and the driven rotational body and relatively rotating the driving rotational body and the driven rotational body when electric power is applied thereto, and a deceleration mechanism that decelerates a rotational speed of the electric motor and transmits the decelerated rotational speed to the driven rotational body.

Valve timing control apparatus of internal combustion engine

A valve timing control device for an internal combustion engine includes: a driving rotation member, a driven rotation member, a speed reduction mechanism, a circumferential clearance of the each of the rolling member being formed within an angle range of 0.01&#xb0; to 0.4&#xb0; in a circumferential direction from a reference line extending from a rotation axis of the driving rotation member in a radial direction, in a space constituted by the eccentric rotation member, the internal teeth constituting section, and the one of the holding holes.

Valve-timing control device for internal combustion engine

A valve timing control apparatus includes: an urging member to which a set load is provided to act, to the cam shaft, an urging force from one of the most retard angle position and the most advance angle position toward the intermediate phase position; and a controller configured to sense, as the intermediate phase position, a position at which a relative rotational speed between the driving rotational member and the cam shaft is varied by the relative rotation of the cam shaft beyond a region in which the cam shaft is controlled by the set load of the urging member, when the cam shaft is controlled to be relatively rotated from the one of the most retard angle position and the most advance angle position beyond the intermediate phase position.

Valve timing control apparatus for internal combustion engine and controller for valve timing control apparatus

A balancer device of an internal combustion engine, has a drive gear engaged with an input gear to which a rotation force is transmitted from a crankshaft; a balancer drive shaft to which the rotation force is transmitted from the drive gear and which has a balancer weight; a balancer drive gear rotating integrally with the balancer drive shaft; a balancer driven gear engaged with the balancer drive gear; and a balancer driven shaft rotating integrally with the balancer driven gear and having a balancer weight. At least one of the drive gear, the balancer drive gear and the balancer driven gear is provided, on both axial direction side surfaces thereof, with ring-shaped grooves whose diameters are different from each other. The ring-shaped grooves are formed up to a depth from the surface of the gear at which both the ring-shaped grooves overlap each other in the axial direction.

Balancer device of internal combustion engine

A valve-timing control apparatus includes a drive rotator configured to receive a rotation from a crankshaft; a driven rotator fixed to a cam shaft; and an electric motor. The electric motor includes a stator fixed to the driven rotator, a rotor that rotates relative to the stator, a coil provided to at least one of the stator and the rotor, and a motor output shaft fixed to the rotor. The valve-timing control apparatus further includes a speed-reduction mechanism; a slip ring provided to one of the drive rotator and a fixed member, and configured to feed power to the coil; a power-feeding brush provided to another of the drive rotator and the fixed member, and abutting on the slip ring; a detection-target section provided to one of the fixed member and the motor output shaft, and located on an inner circumferential side beyond a contact portion between the slip ring and the power-feeding brush; and a detecting section provided to another of the fixed member and the motor output shaft, and configured to detect a rotational position of the motor output shaft by detecting a position of the detection-target section.

Valve-timing control apparatus for internal combustion engine

A valve timing control device comprises a drive rotation member driven by a crankshaft of an internal combustion engine; a driven rotation member fixed to a camshaft that actuates engine valves to open and close, the drive rotation member and driven rotation member being coaxially arranged to make a relative rotation therebetween; a phase varying mechanism that rotates the driven rotation member relative to the drive rotation member within a given angle, the phase varying mechanism being able to cause the driven rotation member to take the most-retarded phase position, the most-advanced phase position and a middle phase position defined between the most-retarded phase position and the most-advanced phase position; and a position keeping mechanism that is able to keep the driven rotation member at least the most-retarded phase position and the middle phase position at the time of starting the engine, and is able to select one of the most-retarded phase position and the middle phase position in accordance with an operation condition of the engine.

Valve timing control device of internal combustion engine

A valve control apparatus includes a variable mechanism configured to vary operating states of two intake valves by varying a swing range of a single swing cam; a primary swing arm configured to receive swinging force from the swing cam by becoming in contact with the swing cam, and configured to open/close one of the two intake valves; a secondary swing arm configured to open/close another of the two intake valves; and a connection changeover mechanism configured to connect/disconnect the primary swing arm with/from the secondary swing arm in accordance with an operating state of engine. The connection changeover mechanism disconnects the primary swing arm from the secondary swing arm to maintain the another of the two intake valves in a non-lifted state, when the variable mechanism controls a swing amount of the primary swing arm within a range below a predetermined amount. The connection changeover mechanism connects the primary swing arm with the secondary swing arm to open and close both of the two intake valves together, when the variable mechanism controls the swing amount of the primary swing arm within a range greater than or equal to the predetermined amount.

Valve control apparatus for internal combustion engine

A variable valve actuating apparatus for an internal combustion engine includes: a control shaft rotatably supported through a bearing to a body of the engine, and arranged to rotate about a center axis to control an operating state of an engine valve, the control shaft including; a control cam having a center which is off the center axis of the control shaft in a first direction; and a journal portion rotatably supported by the bearing, the journal portion having a center axis which is off the center axis of the control shaft in a second direction different from the first direction of the control cam.

Variable valve actuating apparatus for internal combustion engine and control shaft for variable valve actuating apparatus

A variable valve actuation apparatus of an internal combustion engine has a multinodular-link motion converter, to vary at least a working angle. A position of rotation of a control shaft, variably adjusting the attitude of the motion converter, is set, so that, at a peak lift during a valve opening period, an angle &#x3b3;between an extension line of a line segment connecting a first fulcrum corresponding to a drive-eccentric-cam center and a second fulcrum provided on a rocker arm and a line segment connecting the second fulcrum and a third fulcrum provided on the rocker arm at a position different from the second fulcrum at a middle working-angle control mode is less than both an angle &#x3b3;between the two line segments at a minimum working-angle control mode and an angle &#x3b3;between the two line segments at a maximum working-angle control mode.

Variable valve actuation apparatus of internal combustion engine

For an internal combustion engine, there is provided a valve actuation device which comprises a cam shaft having thereon at least first and second cams that are different in profile; a first rocker arm that is in contact with the first cam to be swung, the first rocker arm being adapted to actuate an engine valve; a second rocker arm that is in contact with the second cam to be swung; a coupling mechanism that selectively couples and uncouples the first and second rocker arms; and an electric actuating mechanism that actuates the coupling mechanism with an electric power for the selective coupling and uncoupling.

Valve actuation device of internal combustion engine

A valve-lash adjuster equipped valve operating device for an internal combustion engine includes a biasing device biasing an engine valve in a valve-closing direction, and a valve drive mechanism opening the engine valve against the spring bias of the biasing device. A hydraulic zero lash adjuster is disposed between the engine valve and the valve drive mechanism to provide zero valve lash. A restriction device is provided to restrict a compressive force applied from each of the engine valve and the valve drive mechanism to the zero lash adjuster, when the engine is stopped.

Valve-lash adjuster equipped valve operating device for internal combustion engine

A low speed cam is disposed on a cam shaft. A low speed sub-rocker arm actuated by the low speed cam is pivotally connected to a main rocker arm. A connecting member is supported by the main rocker arm. The connecting member has both a first condition wherein the sub-rocker arm and the main rocker arm are fixed to each other to constitute a single unit and a second condition wherein the sub-rocker arm and the main rocker arm are disengaged from each other. A hydraulically actuating mechanism has a hydraulic work chamber. The mechanism induces the first condition of the connecting member upon discharge of hydraulic fluid from the work chamber and induces the second condition upon feeding of hydraulic fluid to the work chamber. A control unit causes the hydraulically actuating mechanism to induce the first condition of the connecting member when the engine stops.

Valve operating device of internal combustion engine

In an engine valve assembly, a valve lifter comprises a cylindrical main body portion and a head wall portion by which an opening of the cylindrical main body portion is enclosed and with which a cam is brought in contact, a valve stem is contacted on an axial center of the valve lifter and is disposed obliquely with respect to a direction of gravity, an exit of a lubricating oil supply bore is opened to an inner space of the head wall portion and is revolved due to a revolution of the valve lifter caused by a friction developed on the basis of a revolution of the cam, and a spring retainer supports an end of a valve spring, the spring retainer being attached onto the valve stem.

Engine valve assembly for internal combustion engine

A relative angular phase between a timing sprocket,and a camshaft,is changed by rotating a vane rotor,in a normal-rotation direction or in a reverse-rotation direction by way of relative application of hydraulic pressure to one of a timing-advance phase hydraulic pressure chamber,and a timing-retard phase hydraulic pressure chamber,both defined in a housing,and relative release of hydraulic pressure from the other of the hydraulic pressure chambers, in order to vary the opening and closing timing of an intake valve. A restricting mechanism,is also provided for reverse rotation of the vane rotor, which may occur during rotating from the timing-retard phase to the timing advance phase owing to a positive fluctuating torque of the camshaft. In the restricting mechanism, a plunger,is projected outward by way of a hydraulic pressure supplied to a high-pressure chamber,, so that the plunger is constantly in abutted-contact with one side wall,, and whereby the plunger,produces a pushing a force or thrust by virtue of a check valve,, so as to counteract the positive fluctuating torque. A turning-back phenomenon of the vane rotor can be restricted in presence of torque fluctuations of the camshaft during rotation of the vane rotor, thus enhancing the responsiveness of valve timing control.

A decompression engine brake device is incorporated with an internal combustion engine. The device comprises an exhaust valve arranged to open and close an exhaust port of a combustion chamber of the engine. A valve stem extends from the exhaust valve. A valve lifter is slidably disposed in a cylinder head of the engine. The valve lifter has the valve stem contacting thereto. An exhaust cam disposed about an exhaust cam shaft is operatively engageable with the valve lifter to actuate the exhaust valve in accordance with a contour of the exhaust cam. An engine brake cam is defined by the exhaust cam. A hydraulically operating device is employed for inducing an operative engagement between the engine brake cam with the valve lifter thereby to actuate the exhaust valve in accordance with a contour of the engine brake cam.

Decompression engine brake device of automotive internal combustion

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Atsugi, Japan

Seiji Tsuruta