公开(公告)号：US20020033158A1

公开(公告)日：2002-03-21

申请号：US09899673

申请日：2001-07-05

Inventor： Keith A. Novak ,  James R. Dietz ,  Michael A. Mahy

IPC: F01L013/08

CPC classification number: F01L13/085 ,  F01L13/08 ,  F01L2760/001 ,  F02B2275/22

Abstract: An internal combustion engine having a vacuum release mechanism that includes a centrifugally actuated member movably attached to the camshaft and having a vacuum release cam extending therefrom. The vacuum release cam is in lifting engagement with the exhaust valve assembly at crankshaft cranking speeds during a portion of the power stroke to relieve vacuum forces opposing motion of the piston. The vacuum release cam centrifugally pivots out of engagement with the exhaust valve assembly in response to the crankshaft attaining running speeds.

Abstract translation: 一种具有真空释放机构的内燃机，其包括可移动地附接到凸轮轴并具有从其延伸的真空释放凸轮的离心致动构件。 真空释放凸轮在功率冲程的一部分期间以曲轴启动速度与排气门组件提升接合，以减轻与活塞相反的运动的真空力。 真空释放凸轮随着曲轴达到运行速度离心地与排气门组件脱离接合。

公开(公告)号：US20040187825A1

公开(公告)日：2004-09-30

申请号：US10790942

申请日：2004-03-01

Applicant: HONDA MOTOR CO., LTD.

Inventor： Masaya Kurokawa ,  Akihiro Iida

IPC: F01L013/08

CPC classification number: F01L1/022 ,  F01L1/024 ,  F01L13/085

Abstract: This invention relates to a cam mechanism with a decompression device formed by integrating a centrifugal weight and a decompression cam lobe. The decompression device is formed by preparing a cylindrical shaft having a decompression cam lobe at one end of the shaft and a centrifugal weight at the other end. The device is constructed to be disposed on a camshaft by inserting the decompression cam lobe into a grove portion of a second cam, and pivotally supporting the shaft receiving hole on the camshaft.

Abstract translation: 本发明涉及一种具有减压装置的凸轮机构，所述减压装置通过将离心式重量和减压凸轮凸角相结合而形成。 减压装置通过制备在轴的一端具有减压凸轮凸角的圆柱形轴和另一端的离心重量来形成。 该装置构造成通过将减压凸轮凸角插入到第二凸轮的凹槽部分中并且枢转地支撑在凸轮轴上的轴接收孔而设置在凸轮轴上。

公开(公告)号：US20040144352A1

公开(公告)日：2004-07-29

申请号：US10351202

申请日：2003-01-24

Inventor： Giuseppe Ghelfi ,  Maurizio Borio ,  Stefano Albanello ,  Giovanni Arisio

IPC: F01L013/08

CPC classification number: F02B75/16 ,  F01L13/085 ,  F01L2101/00 ,  F02B2275/22

Abstract: A compression release mechanism for small internal combustion engines, including a compression release member having an auxiliary cam and a weight section. The compression release member is supported for rotation on an annular bearing surface which is in eccentric relation to the longitudinal axis of the engine camshaft. At engine cranking speeds, the compression release member rotates with the camshaft, and the auxiliary cam projects beyond the base circle of a cam lobe on the camshaft to periodically engage a valve to vent pressure from the engine combustion chamber during the compression stroke of the piston to aid in engine cranking. After the engine starts, rapid rotation of the camshaft causes the compression release member to rotate under the inertial load of the weight section thereof to a position in which the auxiliary cam is retracted within the base circle of the cam lobe such that combustion may proceed in a conventional manner.

Abstract translation: 一种用于小型内燃机的压缩释放机构，包括具有辅助凸轮和重物部分的压缩释放构件。 压缩释放构件被支撑在与发动机凸轮轴的纵向轴线偏心的环形轴承表面上旋转。 在发动机起动速度下，压缩释放构件与凸轮轴一起旋转，并且辅助凸轮突出超过凸轮轴上的凸轮凸角的基圆，以在活塞的压缩冲程期间周期性地接合阀以从发动机燃烧室排出压力 以协助发动机起动。 在发动机起动之后，凸轮轴的快速旋转使得压缩释放构件在其重量部分的惯性载荷下旋转到辅助凸轮在凸轮凸角的基圆内缩回的位置，使得燃烧可以在 常规方式。

公开(公告)号：US20040139937A1

公开(公告)日：2004-07-22

申请号：US10736592

申请日：2003-12-17

Applicant: HITACHI UNISIA AUTOMOTIVE, LTD.

Inventor： Yoshinori Ichinosawa

IPC: F01L001/34 ,  F01L013/08

CPC classification number: F01L1/022 ,  F01L1/024 ,  F01L1/3442 ,  F01L2001/34459 ,  F01L2001/34469 ,  F01L2001/34479 ,  F01L2001/34483 ,  F01L2800/00

Abstract: A valve timing control system includes a first device for changing a mounting angle between driving and driven rotators through relative rotation thereof and including first and second rotating mechanisms coupled to each other in series, and a second device for locking the first device at a mounting-angle position which is suitable for engine start and is set between a most-lagged-angle position and a most-advanced-angle position. The second device includes a first lock mechanism for locking the first rotating mechanism at one of the most-lagged-angle position and the most-advanced-angle position and a second lock mechanism for locking the second rotating mechanism at another position. The first and second rotating mechanisms are locked by the first and second lock mechanisms at opposite positions to maintain the mounting angle at the mounting-angle position suitable for engine start.

Abstract translation: 气门正时控制系统包括第一装置，用于通过相对旋转来改变驱动旋转体和从动旋转体之间的安装角度，并包括彼此串联连接的第一和第二旋转机构，以及用于将第一装置锁定在安装位置处的第二装置， 适用于发动机起动的角度位置，设定在最滞后角位置与最前进角位置之间。 第二装置包括用于将第一旋转机构锁定在最滞后角位置和最前进角位置之一处的第一锁定机构和用于将第二旋转机构锁定在另一位置的第二锁定机构。 第一和第二旋转机构由第一和第二锁定机构锁定在相对的位置，以将安装角度保持在适于发动机启动的安装角位置。

公开(公告)号：US20040003791A1

公开(公告)日：2004-01-08

申请号：US10328290

申请日：2002-12-23

Inventor： Giuseppe Ghelfi ,  Luciano Golzio ,  Stefano Albanello ,  Giovanni Arisio

IPC: F01L013/08

CPC classification number: F02N19/004 ,  F01L13/08 ,  F01L13/085

Abstract: A compression release device for a small internal combustion engine, including a flyweight operatively coupled to a cam member via a cam pivot shaft, wherein a lever arm associated with the flyweight is longer than a lever arm associated with the cam member, such that a relatively small component of pivotal movement of the flyweight is translated into a relatively large component of rotation of the cam member. At engine cranking speeds, a spring biases the flyweight to a first position, such that a cam surface of the cam member extends beyond the base circle of the exhaust cam lobe to partially open the exhaust valve and allow release of pressure within the combustion chamber of the engine. At engine running speeds, the flyweight is moved under centrifugal force to a second position, rotating the cam member to a corresponding second position in which the cam surface is disposed within the base circle of the exhaust cam lobe, such that combustion may occur in a conventional manner.

Abstract translation: 一种用于小型内燃机的压缩释放装置，包括通过凸轮枢轴可操作地联接到凸轮构件的飞轮，其中与所述飞轮重合的杠杆臂比与所述凸轮构件相关联的杠杆臂长，使得相对 飞轮的枢转运动的小部件被转换为凸轮构件的相对较大的旋转部件。 在发动机起动速度下，弹簧将飞轮偏压到第一位置，使得凸轮构件的凸轮表面延伸超出排气凸轮凸角的基圆以部分地打开排气阀，并允许释放燃烧室内的压力 引擎。 在发动机运转速度下，飞轮在离心力下移动到第二位置，将凸轮部件转动到相应的第二位置，在该第二位置，凸轮表面设置在排气凸轮凸角的基圆内，使得燃烧可能发生在 常规方式。

公开(公告)号：US20040000282A1

公开(公告)日：2004-01-01

申请号：US10459455

申请日：2003-06-12

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kenji Kataoka ,  Kimitoshi Tsuji ,  Yasushi Kusaka

IPC: F01L013/08

CPC classification number: F02D13/0215 ,  F02D2013/0292 ,  F02N19/004 ,  Y02T10/18

Abstract: An engine is cranked by a motor generator at a start time of the engine. An engine ECU opens an intake valve or an exhaust valve during a compression stroke using a valve control mechanism during a period from when cranking is started until when a predetermined crank angle position (detected by a crank angle sensor) is reached, thereby reducing a compression workload.

Abstract translation: 发动机在发动机起动时由发电机起动。 发动机ECU在从起动开始到达到预定的曲柄角位置（由曲柄角传感器检测到）之间的时间段期间使用阀控制机构在压缩冲程期间打开进气阀或排气阀，由此减小压缩 工作量

公开(公告)号：US20030145820A1

公开(公告)日：2003-08-07

申请号：US10358011

申请日：2003-02-04

Applicant: Honda Giken Kogyo Kabushiki Kaisha

Inventor： Hiroyuki Yoshida ,  Tomonori Ikuma ,  Mitsuharu Tanaka

IPC: F01L013/08

CPC classification number: F01L13/085 ,  F01L1/024 ,  F01L2001/0535 ,  F01L2101/00 ,  F02B61/045 ,  F02B75/20 ,  F02B2075/027 ,  F02B2075/1808 ,  Y10T29/49231

Abstract: A decompressing mechanism (D) for an internal combustion engine (E) is incorporated into a camshaft (15) provided with a bore (54) extending in the direction of the arrow (A) along the axis (L1) of rotation of the camshaft (15). The decompressing mechanism (D) includes a decompression member (80) formed by metal injection and integrally having a flyweight (81), a decompression cam (82) for exerting a valve-opening force through an exhaust rocker arm (48) on an exhaust valve, and an arm (83) connecting the flyweight (81) and the decompression cam (82). The flyweight (81) is supported for swing motion by a pin (71) on the camshaft (15). The axis (L2) of swing motion of the flyweight (81) is included in a plane (P4) substantially perpendicular to the axis (L1) of rotation, and does not intersect the axis (L1) of rotation and the bore (54) of the camshaft (15). The fully expanded decompression member (80) revolves in a cylindrical space of a small diameter around the camshaft (15).

Abstract translation: 用于内燃机（E）的减压机构（D）被并入设置有沿着箭头（A）的方向沿着凸轮轴的旋转轴线（L1）延伸的孔（54）的凸轮轴（15） （15）。 减压机构（D）包括通过金属喷射形成的减压构件（80），并且一体地具有飞重（81），减压凸轮（82），用于通过排气摇臂（48）在排气口上施加开阀力 阀和连接飞重（81）和减压凸轮（82）的臂（83）。 飞轮（81）由凸轮轴（15）上的销（71）支撑以进行摆动运动。 飞轮（81）的摆动运动的轴线（L2）包括在基本上垂直于旋转轴线（L1）的平面（P4）中，并且不与旋转轴线（L1）和孔（54）相交， 的凸轮轴（15）。 完全膨胀的减压构件（80）围绕凸轮轴（15）在小直径的圆柱形空间中旋转。

公开(公告)号：US20020157631A1

公开(公告)日：2002-10-31

申请号：US09771852

申请日：2001-04-25

Inventor： Yuichi Kawamoto

IPC: F01L013/08

CPC classification number: F01L13/085 ,  F02B61/02 ,  F02B2275/20

Abstract: In an automatic decompression device of a small OHC-type engine, a decompression control mechanism A comprises a weight member 5 including a pivot portion 5A pivotably attached to a cam shaft 20 at a position apart from a center axis O20 of the cam shaft and having an outer periphery curved along an outer periphery of a cam sprocket 15 and a tip end portion that engages with an operating shaft 1, to swing around the pivot portion 5A outwardly by rotation of the cam shaft 20; and a bias member (coil spring 17) for biasing a portion of the weight member 5 that is apart from the pivot portion 5A toward the center axis of the cam shaft 20 in a swing area, wherein the tip end portion 5C of the weight member 5 that engages with the operating shaft is situated on an opposite side of the pivot portion 5A with respect to the center axis O20 of the cam shaft 20.

Abstract translation: 在小型OHC型发动机的自动减压装置中，减压控制机构A包括配重构件5，配重构件5包括枢转部分5A，该枢转部分5A在远离凸轮轴的中心轴线O20的位置处可枢转地附接到凸轮轴20，并且具有 沿着凸轮链轮15的外周弯曲的外周和与操作轴1接合的前端部，通过凸轮轴20的旋转向外摆动枢转部5A; 以及偏置构件（螺旋弹簧17），用于在摆动区域中朝向凸轮轴20的中心轴线偏压配重构件5的远离枢转部5A的部分，其中，配重构件的前端部5C 与枢轴部5A相对于凸轮轴20的中心轴线O20位于相对侧。

公开(公告)号：US20020148426A1

公开(公告)日：2002-10-17

申请号：US10167143

申请日：2002-06-11

Applicant: MTD Southwest Inc.

Inventor： Michael Billetdeaux

IPC: F01L013/08

CPC classification number: F01L13/085

Abstract: A compression relief mechanism for a small four-cycle engine to facilitate cranking. The engine has a single cam actuating both the intake and exhaust valves. The cam has a primary cam surface and a boss extending from its side. The exhaust valve cam follower engages only the primary cam surface. The intake valve cam follower has a first cam follower surface engaging only the primary cam surface and a secondary cam engagement surface engaging only the boss to open the intake valve during a predetermined portion of the engine's compression cycle. The opening of the intake valve during the compression cycle provides compression relief facilitating cranking. The secondary cam follower surface may be provided on either the intake or exhaust cam follower to open either the intake or exhaust valve during the compression cycle to provide the desired compression relief during cranking. In an alternate embodiment, the secondary cam surface is displaced by centrifugal force to a location inhibiting the secondary cam engagement surface from engaging the secondary cam surface at normal engine operating speeds.

Abstract translation: 一种用于小型四冲程发动机的压缩释放机构，以方便起动。 发动机具有一个致动进气阀和排气阀的凸轮。 凸轮具有主凸轮表面和从其侧面延伸的凸台。 排气门凸轮从动件仅与主凸轮表面接合。 进气阀凸轮从动件具有仅与主凸轮表面接合的第一凸轮从动件表面和仅在凸轮接合的次级凸轮接合表面，以在发动机的压缩循环的预定部分期间打开进气门。 进气阀在压缩循环期间的打开提供压缩释放，便于起动。 次级凸轮从动件表面可以设置在进气或排气凸轮随动件上，以在压缩循环期间打开进气门或排气门，以在起动期间提供期望的压缩释放。 在替代实施例中，次级凸轮表面通过离心力移动到禁止辅助凸轮接合表面在正常发动机运转速度下接合次级凸轮表面的位置。