Unisia Jecs Corporation

Nissan Motor Company Limited

Hitachi, Ltd.

Hitachi Automotive Systems, Ltd.

Atsugi Unisia Corp.

Other

Harmonic Drive Systems Inc.

Hyundai Motor Company

Unisia Corporation

Yoshihiko Yamada

Seinosuke Hara

Makoto Nakamura

Junichiro Onigata

Kishiro Nagai

Shinichi Takemura

Keisuke Takeda

Shoji Morita

Tsuneyasu Nohara

Mikihiro Kajiura

Akira Hidaka

Tsutomu Hibi

Tetsuro Goto

Yoshiaki Tanaka

Ryosuke Hiyoshi

Yoshiaki Miyazato

Yoshihide Kiyosawa

Seiji Tsuruta

Jun Handa

Tamotsu Todo

Katsuhisa Todoroki

Shunichi Aoyama

Katsuya Moteki

Kaoru Eguchi

Hyung Ick Kim

Yusuke Takagi

Hong Wook Lee

Akinobu Maeyama

Noriomi Hosaka

Katsuhiko Uchida

Bonghoon Han

Yukio Yamakawa

Jaechun Kim

Shigeru Kawakami

Akira Ohnuki

Manabu Katayama

Masaru Nemoto

An actuator of a variable compression ratio mechanism includes: a control link; an arm link; a control shaft; a housing including a receiving portion in which a connection portion between the second end portion of the control link and the arm link is received, and a support hole formed within the housing, and rotatably supporting the control shaft; and a speed reduction device, the control shaft including a fixing portion inserted and fixed within the receiving portion in a fixing hole formed in the arm link at a predetermined axial position, and a first journal portion which is formed at a tip end portion of the control shaft, which has a diameter smaller than a diameter of the fixing portion, and which is supported by a first bearing hole formed in the support hole.

Actuator of variable compression ratio mechanism and actuator of link mechanism

The control shaft () of a variable compression ratio mechanism is coordinated with the auxiliary shaft () of an actuator device () through an intermediate link (). The housing () of the actuator device () has on the lower surface thereof an oil filter mounting seat section (), and a stopper section () is formed integrally with the oil filter mounting seat section (). A second arm () of the auxiliary shaft () comes in contact with the stopper section () to define the limit of the compression ratio on the low compression ratio side. The stopper section () has high rigidity because the oil filter mounting seat section () having high rigidity and the stopper section () are integrated together.

Actuator device for variable compression ratio internal combustion engine

A variable compression ratio mechanism for an internal combustion engine includes a gear reducer that varies an engine compression ratio. The gear reducer includes an input-side member connected to a rotation shaft of the actuator; an output-side member that transmits a reduced rotation of the actuator to the control shaft; a fixed member fixed to a housing of the actuator; and an intermediate member that transmits torque from the input-side member to the output-side member and the fixed member, and has a first gear portion engaged with the fixed member and a second gear portion engaged with the output-side member. A ratio of a number of teeth of the fixed gear portion to a number of teeth of the first gear portion is higher than a ratio of a number of teeth of the output-side gear portion to a number of teeth of the second gear portion.

Variable compression ratio mechanism for internal combustion engine

A variable compression ratio mechanism for an internal combustion engine includes a gear reducer that varies an engine compression ratio. The gear reducer includes an input-side member connected to a rotation shaft of an actuator; an output-side member that transmits a reduced rotation of the actuator to the control shaft; a fixed member fixed to a housing of the actuator; and an intermediate member that transmits torque from the input-side member to the output-side member and the fixed member, and has a first gear portion engaged with the fixed member and a second gear portion engaged with the output-side member. A ratio of a number of teeth of the fixed gear portion to a number of teeth of the first gear portion is lower than a ratio of a number of teeth of the output-side gear portion to a number of teeth of the second gear portion.

Disclosed is an actuator for a link mechanism of an internal combustion mechanism, which includes: a control link (); an arm link () pivotably connected to the other end of the control link; a control shaft () to which the arm link is fixed by press-fitting; a housing body () having a support hole () formed to rotatably support therein the control shaft and an accommodation room () formed in a direction intersecting an center axis of the support hole to accommodate therein the connection site between the arm link and the control link. The housing body further has through holes formed therethrough from an outer surface of the housing body to the accommodation room in an axial direction of the control shaft such that insertion support parts (to) of a support jig () can be inserted through and removed from the respective through holes.

Actuator for link mechanism for internal combustion engine, and method for assembling said actuator

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

An actuator of a variable compression ratio mechanism which includes: a control link; a control shaft; a housing; a wave gear speed reduction device arranged to transmit the reduced rotation speed to the control shaft; a first bearing portion which is provided between the control shaft and a wave generation device of the wave gear speed reduction device, and which rotatably supports a first axial end portion of the wave generation device; and a second bearing portion which is provided between the housing and the wave generation device, and which rotatably supports an second axial end portion of the wave generation device, at least one of the first bearing portion and the second bearing portion being disposed inside an axial width of an outer circumference portion of the wave generation device.

Actuator of link mechanism for internal combustion engine and actuator for variable compression ratio mechanism

A valve control apparatus includes a drive shaft; a control shaft including a control shaft main body configured to be rotationally controlled according to a state of engine, and a control eccentric shaft located eccentrically relative to a rotation center of the control shaft main body; a rocker arm swingably supported by the control eccentric shaft and configured to convert a rotational motion of the drive shaft to a swinging motion; and a swing cam configured to open/close an engine valve according to the swinging motion of rocker arm. Both ends of the control eccentric shaft are formed with fixing holes extending in a radial direction of the control eccentric shaft. The control shaft main body is formed with insertion holes passing through the control shaft main body in a radial direction of the control shaft main body. The insertion holes respectively face the fixing holes. The control eccentric shaft is fixed to the control shaft main body by bolts. The bolts pass respectively through the pair of insertion holes and are screwed respectively into the fixing holes.

Valve control apparatus for internal combustion engine

In a variable valve system for an internal combustion engine and its driving mechanism, the variable valve system comprises: a variable mechanism that revolves a control axle to change an operation characteristic of an engine valve; a projection section projected at an outer peripheral predetermined position in an axial direction of the control axle and on a tip of which a fixture section is formed; a fixture member fixed in a grasped state for the projection member via an engagement member engaged on the fixture section; a driving mechanism configured to provide a rotating force for the control axle via the fixture member; and control means (a control section) for controlling the driving mechanism in accordance with a driving state of the engine.

Variable valve system for internal combustion engine and its driving mechanism

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

A valve operating apparatus for an internal combustion engine including a drive cam, first and second swing cams, first and second motion transmission mechanisms and first and second valve actuating members. The first and second swing cams are provided with identical swing motion characteristic with respect to a rotation angle of the drive cam through the first and second motion transmission mechanisms. The first swing cam and the first valve actuating member cooperate with each other to provide a valve lift amount of the engine valve for the first group of cylinders with respect to a swing angle of the first swing cam which is identical to a valve lift amount of the engine valve for the second group of cylinders with respect to a swing angle of the second swing cam.

Valve operating apparatus for internal combustion engine

A variable valve system varies an operation condition of an engine valve by controlling an angular position of a control shaft in accordance with an operation condition of the engine. The system has an actuating mechanism for actuating the control shaft. The actuating mechanism comprises a mounting member that is connected to one end of the control shaft by means of bolts and has a projection projected axially in an opposite direction of the control shaft; a permanent magnet piece that is mounted on the projection thereby to rotate together with the control shaft; and a sensing device that senses a rotation condition of the permanent magnet piece.

Variable valve system with control shaft actuating mechanism

A VVA apparatus includes a control shaft arranged rotatable in accordance with the engine operating conditions, an alteration mechanism for changing a lift amount and an operating angle of an engine valve in accordance with rotation of the control shaft, and a drive mechanism for rotating the control shaft and including an electric motor and a reduction mechanism. The reduction mechanism has a reduction ratio set to be larger when the valve is under small lift-amount and operating-angle control than when the valve is under large lift-amount and operating-angle control.

Variable-valve-actuation apparatus for internal combustion engine

A variable valve apparatus for an internal combustion engine including a cylinder set comprising a plurality of cylinders. The variable valve apparatus includes: a control shaft adapted for rotation; a valve actuating mechanism provided for each cylinder of the cylinder set and adapted to vary a valve lift characteristic of an engine valve of the each cylinder of the cylinder set in accordance with a rotational position of the control shaft; and a valve lift adjusting mechanism provided for each cylinder of a first subset of the cylinder set and adapted to adjust the valve lift characteristic of the engine valve of the each cylinder of the first subset in accordance with a standard valve lift characteristic determined in accordance with the valve lift characteristic of the engine valve of each cylinder of a second subset of the cylinder set.

Variable valve apparatus for internal combustion engine

Growing community of inventors

Fujisawa, Japan

Yoshihiko Yamada