公开(公告)号：US20020112690A1

公开(公告)日：2002-08-22

申请号：US10077952

申请日：2002-02-20

Inventor： Akifumi Nomura ,  Yasuo Shimura ,  Akira Tokito ,  Kazuhisa Takemoto

IPC: F01L013/08

CPC classification number: F01L13/08 ,  F01L2001/0535 ,  F01L2760/007 ,  F02B2275/20

Abstract: In a decompression unit including a decompression arm, a decompression unit for internal combustion engine is provided in which the followability in the opening-and-closing operation of the air intake valve or the exhaust valve with respect to the cam at high-revolution speeds is satisfactory without increasing the equivalent inertia weight of the valve driving system, and for lowering the cost. A decompression unit includes a first decompression cam that takes the operating position when the number of revolutions of the engine is not more than the predetermined number of revolution during startup. A second decompression cam is provided that takes the operating position by manual operation. A decompression arm includes first and second abutting portions that abut against first and second decompression cams, respectively. An adjusting screw is provided for pressing the rocker arm and a resilient member for bringing the first abutting portion of the decompression arm into abutment against the first decompression cam. The decompression arm pivoted by the first and the second decompression cams pivots the rocker arm via the adjusting screw to open the exhaust valve.

Abstract translation: 在包括减压臂的减压单元中，设置有用于内燃机的减压单元，其中进气门或排气门在高转速时相对于凸轮的打开和关闭操作的跟随性为 满意而不增加阀驱动系统的等效惯量，并降低成本。 减压单元包括第一减压凸轮，其在发动机的转数不大于启动期间的预定转数时采取操作位置。 提供了通过手动操作来取得操作位置的第二减压凸轮。 减压臂包括分别抵靠第一和第二减压凸轮的第一和第二抵接部分。 提供调节螺钉，用于按压摇臂和用于使减压臂的第一邻接部分抵靠第一减压凸轮的弹性构件。 由第一和第二减压凸轮枢转的减压臂通过调节螺钉枢转摇臂以打开排气阀。

公开(公告)号：US20020104500A1

公开(公告)日：2002-08-08

申请号：US09776604

申请日：2001-02-02

Inventor： Scott A. Sjovall ,  Floyd I. Baker ,  Steven A. Kensok ,  Dan Kinsey ,  Steven W. Svacina

IPC: F01L013/08

CPC classification number: F01L9/04 ,  F01L13/08 ,  F02B61/02 ,  F02B75/22 ,  F02B2075/1808

Abstract: An internal combustion engine includes pressure relief devices that reduce pressure due to compression during startup, thereby decreasing the force needed to start the engine. A pressure relief valve mounts on top of the cylinder head and includes a duct to the combustion chamber leading to the valve and a second duct leading to the exhaust port so that gases in the combustion chamber may be vented through the exhaust system. A mechanical actuator having cables directed to each of the pressure relief valves for each of the cylinders manually actuates a first embodiment. A second embodiment includes a solenoid with wiring tied into a starter circuit that actuates the multiple valves from a single actuator.

Abstract translation: 一种内燃机包括减压装置，其能够降低起动期间由压缩引起的压力，从而降低启动发动机所需的力。 压力释放阀安装在气缸盖的顶部，并且包括通向通向阀的燃烧室的管道和通向排气口的第二管道，使得燃烧室中的气体可以通过排气系统排出。 具有针对每个气缸的每个压力释放阀的电缆的机械致动器手动致动第一实施例。 第二实施例包括螺线管，其具有被连接到启动器电路中的线路，其从单个致动器致动多个阀。

公开(公告)号：US20040261744A1

公开(公告)日：2004-12-30

申请号：US10853957

申请日：2004-05-26

Applicant: HONDA MOTOR CO., LTD.

Inventor： Koichi Tsutsumi ,  Hidetoshi Takamatsu ,  Itoko Kobayashi ,  Ryuichi Abe

IPC: F01L013/08

CPC classification number: F01L13/085 ,  F01L1/26 ,  F01L2001/0535 ,  F01L2105/00

Abstract: A decompression device is provided for an internal combustion engine having a cylinder head provided with a pair of left and right camshaft bearings sandwiching intake valves and exhaust valves with a structure that is both simple and small. A camshaft is provided having cam projections for at least a pair of intake cams between camshaft side bearings corresponding to the pair of left and right bearings, and a decompression member with a decompression cam with a centrifugal weight arranged at a camshaft end passing through the bearing close to the camshaft end so that a tip thereof is arranged in the vicinity of the cam projections, with the decompression member comprising the centrifugal weight, the decompression cam, and a rotatable shaft coupling the centrifugal weight and the decompression cam in an integral manner.

Abstract translation: 本发明提供一种内燃机的减压装置，该内燃机具有设置有一对左右凸轮轴轴承的气缸盖，所述左右凸轮轴轴承夹着进气门和具有简单且小型结构的排气门。 凸轮轴具有用于至少一对进气凸轮的凸轮凸轮，所述凸轮轴侧轴承对应于所述一对左右轴承，以及具有减压凸轮的减压构件，所述减压凸轮具有布置在穿过所述轴承的凸轮轴端部处的离心配重 靠近凸轮轴端部，使得其顶端布置在凸轮突出部附近，减压构件包括离心重物，减压凸轮以及以离心重量和减压凸轮联合的可旋转轴。

公开(公告)号：US20040094110A1

公开(公告)日：2004-05-20

申请号：US10440823

申请日：2003-05-19

Inventor： Wolf Burger ,  Jan Schempp ,  Thomas Schaal

IPC: F01L013/08 ,  F01L001/34

CPC classification number: F01L13/085 ,  F01L2101/00

Abstract: The invention pertains to an automatic decompression device for valve-controlled internal combustion engines, having at least one camshaft for the actuation of gas shuttle valves and a decompression lever, which acts in cooperation with at least one gas shuttle valve and which is attached in a pivoting fashion on the camshaft on an axis of rotation, and which can be moved against a spring force from a first switch position into a second switch position as a result of the centrifugal forces acting on it during the revolution of the camshaft. It is suggested that the decompression lever be designed as a bow element the two ends of which are attached to the camshaft. The decompression arrangement is distinguished by a simple design, and is especially well-suited for small engines due to its lightweight construction.

Abstract translation: 本发明涉及一种用于阀控式内燃机的自动减压装置，其具有至少一个用于致动气体梭阀的凸轮轴和减压杆，减压杆与至少一个气动梭阀协同作用， 在凸轮轴上以旋转轴线的方式枢转，并且由于在凸轮轴的旋转期间作用在其上的离心力，其能够克服弹簧力从第一开关位置移动到第二开关位置。 建议减压杆被设计为弓形元件，其两端附接到凸轮轴。 减压装置的特点是设计简单，特别适用于小型发动机，由于其轻巧的结构。

公开(公告)号：US20020174846A1

公开(公告)日：2002-11-28

申请号：US10117920

申请日：2002-04-05

Inventor： Takashi Ashida ,  Atsushi Sawabuchi

IPC: F01L013/08

CPC classification number: F01L1/022 ,  F01L1/02 ,  F01L1/024 ,  F01L1/047 ,  F01L1/053 ,  F01L13/08 ,  F01L2001/0473 ,  F01L2001/0537

Abstract: A decompression system for a four-cycle engine includes a decompression shaft positioned within a camshaft. The decompression shaft interacts with decompression pins positioned within pin holes formed in the camshaft. In some embodiments, the decompression shaft is formed from a first longitudinal portion and a second longitudinal portion. In other embodiments, the decompression shaft is supported at least in part by a middle portion of a bore that extends through the camshaft.

Abstract translation: 用于四冲程发动机的减压系统包括定位在凸轮轴内的减压轴。 减压轴与位于凸轮轴上形成的销孔内的减压销相互作用。 在一些实施例中，减压轴由第一纵向部分和第二纵向部分形成。 在其它实施例中，减压轴至少部分地由延伸穿过凸轮轴的孔的中间部分支撑。

公开(公告)号：US20010017119A1

公开(公告)日：2001-08-30

申请号：US09777001

申请日：2001-02-05

Inventor： Hiroyuki Suzuki ,  Katsumi Ochiai

IPC: F01L013/08 ,  F01L001/34

CPC classification number: F02B75/007 ,  F01L13/08 ,  F01L13/085 ,  F02B61/045 ,  F02B63/02 ,  F02B2075/027

Abstract: A valve cam mechanism for a four-cycle engine includes an improved construction. The engine includes at least one camshaft having cam lobes to activate at least one of an intake valve and an exhaust valve. The camshaft defines an aperture next to at least one of the cam lobes. The aperture extends generally normal to an axis of the camshaft. A decompression mechanism is provided for manual starting of the engine. The decompression mechanism includes a shaft extending through the aperture. An actuator is affixed to the shaft for pivotal movement about an axis of the shaft. The actuator has a first section arranged to hold the intake or exhaust valve in an open position when the actuator exists in an initial position. A second section is arranged to initially retain the actuator in the initial position and to release the actuator from the initial position when the camshaft rotates. The shaft is rigidly supported by an inner surface of the aperture in part. A space is defined between the shaft and the inner surface of the aperture in the rest part.

Abstract translation: 用于四冲程发动机的阀凸轮机构包括改进的结构。 发动机包括至少一个具有凸轮凸角的凸轮轴，以激活进气门和排气阀中的至少一个。 凸轮轴限定了邻近至少一个凸轮凸角的孔。 孔径大致垂直于凸轮轴的轴线延伸。 提供了用于手动启动发动机的减压机构。 减压机构包括延伸穿过该孔的轴。 致动器固定到轴上以围绕轴的轴线枢转运动。 致动器具有第一部分，其布置成当致动器处于初始位置时将进气门或排气门保持在打开位置。 第二部分被布置成最初将致动器保持在初始位置，并且当凸轮轴旋转时将致动器从初始位置释放。 轴部分地由孔的内表面刚性地支撑。 在轴和其余部分的孔的内表面之间限定一个空间。

公开(公告)号：US20040112321A1

公开(公告)日：2004-06-17

申请号：US10712120

申请日：2003-11-13

Applicant: Briggs & Stratton Corporation

Inventor： Gary J. Gracyalny ,  John H. Thiermann

IPC: F01L013/08

CPC classification number: F01L1/18 ,  F01L1/026 ,  F01L13/08 ,  F01L13/085 ,  F01L2101/00

Abstract: An internal combustion engine having a centrifugally-responsive vacuum release mechanism that relieves a vacuum within a combustion chamber during the expansion stroke of an engine at engine starting speeds. The vacuum release mechanism is disposed adjacent the cam and engages a cam follower at engine starting speeds to unseat an engine valve while an engine piston is moving toward a crankcase and away from the combustion chamber. When the engine rotation speed reaches a desired kick-out speed, the centrifugal force transitions the vacuum release mechanism from an engaged position to a disengaged position. The vacuum release mechanism engages the cam follower to separate the cam follower from the cam when the vacuum release mechanism is in the engaged position. When the vacuum release mechanism is in the disengaged position during normal operating speeds, the cam follower is permitted to contact the cam throughout the entire rotation of the cam.

公开(公告)号：US20030183185A1

公开(公告)日：2003-10-02

申请号：US10115193

申请日：2002-04-02

Inventor： Jinhui Sun ,  Xinqun Gui ,  Xiaoyan Lei

IPC: F01L013/08

CPC classification number: F02D13/0207 ,  F01L9/02 ,  F01L9/04 ,  F01L13/0005 ,  F01L13/0015 ,  F01L2800/00 ,  F02D13/0261 ,  F02D13/0265 ,  F02D13/06 ,  F02D15/04 ,  F02D41/0087 ,  F02D41/062 ,  F02D41/064 ,  F02D2013/0292 ,  F02D2041/0012 ,  F02N19/004 ,  Y02T10/18

Abstract: A control (30) embodies an operating strategy (50) to facilitate engine cranking and starting via control of timing of cylinder intake (18) and exhaust (24) valve opening using a variable valve actuation mechanism (26). Prior to fueling any cylinder (16), the engine (10) is cranked while the variable valve actuation mechanism causes pistons (32) to operate at an initial effective compression ratio for initial cranking that is less than an effective compression ratio for running when the engine is eventually fueled and runs under its own power. Thereafter, and still before fueling, they are caused to operate at an increased effective compression ratio, and still thereafter, a portion of their charges are drawn from the exhaust system (22). As the engine warms up, valve timing is adjusted.

公开(公告)号：US20030116111A1

公开(公告)日：2003-06-26

申请号：US10028511

申请日：2001-12-20

Inventor： J. Michael Shifflette

IPC: F01L013/08

CPC classification number: F01L13/08

Abstract: An apparatus for releasing excessive pressure from a cylinder of an internal combustion engine comprises a sealing element inserted into a passageway that extends from an internal surface of the cylinder through the engine block or cylinder head to end at a point of ambient air pressure. The sealing element is thermally responsive and will release to cause the passageway to form a vent passage between the cylinder and the ambient air upon the occurrence of any one of a number of conditions of excessive pressure and temperature in the cylinder.

Abstract translation: 用于从内燃机的气缸释放过大压力的装置包括插入从气缸的内表面延伸通过发动机缸体或气缸盖的通道中的密封元件，以在环境空气压力的一端结束。 密封元件是热响应的并且将在气缸中发生过多的压力和温度的条件中的任何一个的情况下释放以使通道在气缸和环境空气之间形成通气通道。

公开(公告)号：US20030024495A1

公开(公告)日：2003-02-06

申请号：US10216523

申请日：2002-08-09

Inventor： Gary J. Gracyalny ,  John H. Thiermann

IPC: F01L013/08

CPC classification number: F02B63/02 ,  F01L1/026 ,  F01L1/181 ,  F01L13/08 ,  F01L13/085 ,  F01L2101/00 ,  F02B75/16

Abstract: A retainer retains a release member for engine valves of an internal combustion engine. The release member causes an engine valve to be actuated depending on various operating conditions of the engine, such as engine speed or oil level. The retainer retains the release member to at least one of a cam lobe and a cam gear. The release member may be substantially L-shaped and centrifugally responsive. Alternatively, the release member may be a substantially U-shaped yoke that at least partially surrounds a cam shaft. The retainer includes a pin that is substantially transverse and non-intersecting to the cam shaft. The pin may be substantially straight and interconnect to bosses that project from the cam gear. Alternatively, the pin may be substantially C-shaped and extend into apertures in the cam gear that extend in the axial direction of the cam gear.