公开(公告)号：US4913106A

公开(公告)日：1990-04-03

申请号：US398883

申请日：1989-08-28

Applicant: Jack L. Rhoads

Inventor： Jack L. Rhoads

IPC: F01L1/08 ,  F01L1/245 ,  F01L13/00

CPC classification number: F01L13/0031 ,  F01L1/08 ,  F01L1/245

Abstract: Improvements are provided to the variable duration lifter, and the valve train of which the lifter is a part, which have the effect of reducing the tapping noise of the valves at low RPM, which is characteristic of effective variable duration lifters. This is achieved by utilizing an effective length of the valve train which produces a reduced volume of the oil reservoir defined between the outer cylinder of the lifter and the internal plunger, such that when the engine operates at low RPM, the internal plunger "bottoms out" before the valve seats. This is coupled with a modified cam having a closing ramp which seats the valve more smoothly and quietly than does the conventional ramp. To further insure the quiet seating of the valve at the appropriate point of cam rotation, the bleed passageway of the lifter plunger is enlarged in cross-section in the preferred embodiment, and to reduce trauma on the underside of the lifter, a groove or flat is ground down the entire length of the external cylinder of the lifter which, by virtue of being in communication with the oil gallery, provides lubrication for the cam-following bottom of the lifter body.

Abstract translation: 改进提供给可变持续时间提升器，并且提升器是其一部分的气门机构，其具有降低低RPM的阀门的攻丝噪声的作用，这是有效可变持续时间提升器的特征。 这是通过利用有效长度的气门机构实现的，其产生减小了在提升器的外部气缸和内部柱塞之间限定的储油容积，使得当发动机以低RPM运行时，内部柱塞“底部出来 “阀座前。 这与具有闭合斜坡的改进的凸轮相结合，其比常规斜坡更安静地安置阀。 为了进一步确保阀门在适当的凸轮旋转点处的安静的位置，在优选实施例中，升降器柱塞的排放通道的横截面增大，并且为了减少升降机的下侧的创伤，凹槽或平面 在升降机的外筒的整个长度上被磨平，其通过与油库连通，为升降机主体的凸轮接合底部提供润滑。

公开(公告)号：US4898131A

公开(公告)日：1990-02-06

申请号：US319113

申请日：1989-03-03

Applicant: Makoto Sanada ,  Hiroshi Yamashita ,  Shinichiro Izawa ,  Toshikazu Hamamoto

Inventor： Makoto Sanada ,  Hiroshi Yamashita ,  Shinichiro Izawa ,  Toshikazu Hamamoto

IPC: F01L1/08 ,  F01L1/16 ,  F01L1/18

CPC classification number: F01L1/185 ,  F01L1/08 ,  F01L1/16

Abstract: A valve actuating mechanism for an internal combustion engine in which a rotatable cam has its camming surface disposed to slide on a cam slipper surface of a rocker arm to thereby open and close an intake valve (or exhaust valve) of the engine by rocking motion of the rocker arm. The dimensions, shapes, and relative positions of the rotatable cam and the rocker arm are so designed as to satisfy a condition of V.sub.C +V.sub.F >0, where V.sub.C represents the velocity of movement of a contact point on the camming surface at which the camming surface slides on the cam slipper surface, and V.sub.F the velocity of movement of the contact point on the cam slipper surface at which the cam slipper surface slides on the camming surface.

公开(公告)号：US4886022A

公开(公告)日：1989-12-12

申请号：US292949

申请日：1989-01-03

Applicant: Eiji Nakai

Inventor： Eiji Nakai

IPC: F01L1/08 ,  F01L13/00

CPC classification number: F01L13/0036 ,  F01L13/00 ,  F01L1/0532 ,  Y10T74/2101 ,  Y10T74/2102

Abstract: Engine valve driving apparatus having a camshaft and a radially movable cam supported on the camshaft. A support is fixed to the camshaft. Both the movable cam and the fixed support are formed with holes, whose axes coincide with each other when the movable cam protrudes at its maximum outward position. A connecting pin is disposed in the hole of the fixed support and an oil supply actuates the connecting pin. When the connecting pin is forced by the oil supply, the connecting pin lifts the movable cam radially outwardly to its maximum outward position.

Abstract translation: 发动机气门驱动装置具有凸轮轴和支撑在凸轮轴上的径向可动凸轮。 支撑件固定在凸轮轴上。 可移动凸轮和固定支撑件都形成有孔，当可动凸轮在其最大向外位置突出时，其轴线彼此重合。 连接销设置在固定支撑件的孔中，并且供油器致动连接销。 当连接销被供油器强制时，连接销将可动凸轮径向向外提升到其最大向外位置。

公开(公告)号：US4773359A

公开(公告)日：1988-09-27

申请号：US104907

申请日：1987-10-06

Applicant: Andrea Titolo

Inventor： Andrea Titolo

IPC: F01L1/14 ,  F01L1/26 ,  F01L13/00 ,  F02F1/24 ,  F02F1/42 ,  F01L1/08 ,  F01L1/20

CPC classification number: F01L1/143 ,  F01L1/26 ,  F01L13/0042 ,  F01L2107/00 ,  F02B2275/18 ,  F02F1/4214 ,  F02F2001/245

Abstract: The subject of the invention consists of an overhead valve control for internal combustion engines provided with at least three valves per cylinder controlled through at least one overhead camshaft (1). The control is designed simultaneously to control two mated and parallel valves (3), and is so shaped as to be actuated by a variable profile cam (2).

公开(公告)号：US4770060A

公开(公告)日：1988-09-13

申请号：US831146

申请日：1986-02-19

Applicant: Alvon C. Elrod ,  Nelson, Michael T.

Inventor： Alvon C. Elrod ,  Nelson, Michael T.

IPC: F01L1/08 ,  F01L1/344 ,  F01L1/352 ,  F01L13/00 ,  F02B3/06 ,  F02D13/02 ,  F02D15/04 ,  F16H37/06

CPC classification number: F01L1/34413 ,  F01L1/08 ,  F01L1/352 ,  F01L13/0057 ,  F02D15/04 ,  F01L2001/3521 ,  F02B3/06 ,  F02D2013/0292 ,  Y10T74/19 ,  Y10T74/19126 ,  Y10T74/2102

Abstract: An apparatus for cyclically actuating an actuation member comprises a hollow shaft rotatable about an axis of rotation and defining therein a cam opening therethrough, an inner shaft rotatably carried within the hollow shaft, a cam member fixed to the hollow shaft adjacent the cam opening, a cam member fixed to the inner shaft and projecting through the cam opening of the hollow shaft, a variable transmission having a reference element connected to one of the shafts and an output element connected to the other of the shafts, and an input element; a pulley wheel connected to the shafts for rotating same about the axis, and an electric motor connected to the input element of the variable transmission for rotating same, the electric motor being controlled by an electronic control unit which can include one or more microprocessor units.

Abstract translation: 一种用于循环地致动致动构件的装置包括可围绕旋转轴线旋转的中空轴，并且在其中限定了通过其的凸轮开口，可旋转地承载在中空轴内的内轴，固定到邻近该凸轮开口的中空轴的凸轮构件， 凸轮构件，固定在内轴上并突出穿过中空轴的凸轮开口;可变传动装置，具有连接到一个轴的基准元件和连接到另一个轴的输出元件;以及输入元件; 与所述轴连接的用于围绕所述轴线旋转的滑轮，以及连接到所述可变传动装置的输入元件的电动机用于使其旋转，所述电动机由可包括一个或多个微处理器单元的电子控制单元控制。

公开(公告)号：US4683848A

公开(公告)日：1987-08-04

申请号：US595302

申请日：1984-03-30

Applicant: Corliss O. Burandt

Inventor： Corliss O. Burandt

IPC: F01L1/08 ,  F01L1/16 ,  F01L1/22 ,  F01L1/18

CPC classification number: F01L1/08 ,  F01L1/16 ,  F01L1/22 ,  Y10T74/2101

Abstract: A cam unit comprised of at least two side-by-side cams acts against a follower rocker arm that operates either an intake or exhaust valve of an internal combustion engine. One cam is formed with sloping take-up ramp portions connecting with a lobe portion. The side-by-side cam (or cams) has a base circle portion that increases in diameter to form sloping take-up ramp portions connecting with an eccentric portion slightly larger in radius than the base circle portion. The lobe portion on the one cam projects a radial distance considerably greater than the eccentric portion (or portions). Different working surfaces on the follower arm are thus engaged by the cams to reduce erosion.

Abstract translation: 包括至少两个并排凸轮的凸轮单元作用于操作内燃机的进气门或排气门的从动摇臂。 一个凸轮形成有与凸起部分连接的倾斜的卷取斜面部分。 并列凸轮（或凸轮）具有直径增大的基圆部分，以形成与偏心部分相连的倾斜的卷取斜面部分，该偏心部分的半径略大于基圆部分。 一个凸轮上的凸角部分比偏心部分（或部分）突出一个径向距离。 因此，随动臂上的不同工作表面被凸轮啮合以减少侵蚀。

公开(公告)号：US4335686A

公开(公告)日：1982-06-22

申请号：US101219

申请日：1979-12-07

Applicant: Gunther Herdin ,  Erhard Kauer ,  Maximilian Muckenhuber ,  Eugen Egger

Inventor： Gunther Herdin ,  Erhard Kauer ,  Maximilian Muckenhuber ,  Eugen Egger

IPC: F01L1/04 ,  F01L1/053 ,  F02M39/02 ,  F02M59/10 ,  F01L1/08

CPC classification number: F02M59/102 ,  F01L1/053

Abstract: An inlet valve, an outlet valve and a pump cam are formed on a camshaft. The pump cam is disposed between and axially spaced from the inlet and outlet valve cams. An inlet valve tappet and an outlet valve tappet have end faces engaging said inlet and outlet valve cams, respectively. A cam follower is operable by the pump cam to control a fuel injection pump. A plane which is normal to the axis of said camshaft and defines the axial extent of said pump cam toward one of said tappets intersects said end face of said one tappet to define a line of intersection, whereby said pump has an overlapping portion, which axially overlaps said one tappet, and the axial projection of the periphery of said overlapping portion lies entirely within an envelope which is generated by said line of intersection around said pump cam as said camshaft is rotated.

Abstract translation: 在凸轮轴上形成入口阀，出口阀和泵凸轮。 泵凸轮设置在入口和出口阀凸轮之间并在轴向间隔开。 入口阀挺杆和出口阀挺杆分别具有与所述入口阀和出口阀凸轮啮合的端面。 凸轮从动件可由泵凸轮操作以控制燃油喷射泵。 与所述凸轮轴的轴线垂直并且限定所述泵凸轮朝向所述挺杆之一的轴向延伸的平面与所述一个挺杆的所述端面相交以限定一条交叉线，由此所述泵具有重叠部分，所述重叠部分轴向 所述一个挺杆重叠，并且所述重叠部分的周边的轴向突出部完全位于由所述凸轮轴旋转的所述泵凸轮周围的所述相交线产生的外壳内。

公开(公告)号：US4327676A

公开(公告)日：1982-05-04

申请号：US126769

申请日：1980-03-03

Applicant: Ray G. McIntire ,  Douglas Colvette

Inventor： Ray G. McIntire ,  Douglas Colvette

IPC: F01L1/08 ,  F02B1/12 ,  F02B3/06 ,  F02B23/02 ,  F02B37/00 ,  F02B75/02

CPC classification number: F02B1/12 ,  F02B3/06 ,  F02B2075/027 ,  Y02T10/12

Abstract: An improved method and apparatus four operating a high-speed four cycle compression ignition engine cause the amount of NO.sub.x in the exhaust gases to be reduced substantially. The improved method of operating the high-speed for cycle compression ignition engine is of the type wherein fresh working fluid is introduced through an intake valve, the working fluid is compressed, fuel is injected and burns thereby expanding the working fluid, and the working fluid is scavenged through an exhaust valve, the improvement comprising timing the opening of the intake valve and the closing of the exhaust valve so that no fresh working fluid is permitted to pass out the exhaust valve.The timing of the opening of the intake valve and the closing of the exhaust valve is achieved by adjusting the contours and the relative positions of the valve cams on the cam shaft of the engine.

Abstract translation: 操作高速四循环压缩点火发动机的改进方法和装置使得废气中的NOx的量基本上减少。 操作高速循环压缩点火发动机的改进方法是其中新鲜工作流体通过进气阀引入，工作流体被压缩，燃料被喷射并燃烧从而使工作流体膨胀，并且工作流体 通过排气阀清扫，改进包括定时打开进气门和关闭排气门，使得新鲜工作流体不允许排出排气阀。 通过调节发动机凸轮轴上的凸轮轴的轮廓和相对位置来实现进气门打开和关闭排气门的时间。

公开(公告)号：US3882832A

公开(公告)日：1975-05-13

申请号：US48891774

申请日：1974-07-16

Applicant: HONDA MOTOR CO LTD

Inventor： OHSAKI KIYOSHI ,  TAKAHASHI MORIO

IPC: F01L1/08 ,  F01L1/00 ,  F01L1/047 ,  F01L1/26 ,  F02F1/42 ,  F16H53/02 ,  F01L1/04

CPC classification number: F16H53/02 ,  F01L1/047 ,  F01L1/26 ,  F02F1/4214 ,  Y10T74/2101

Abstract: Three cam lobes formed integrally with a rotary camshaft are employed for operating the valves of a three-valve internal combustion piston engine. The center cam is made larger than one of the other cams in every radial direction to facilitate grinding of the external cam surfaces.

Abstract translation: 与旋转凸轮轴一体形成的三个凸轮凸角用于操作三阀内燃活塞发动机的阀。 中心凸轮在径向方向上大于其他凸轮中的一个，以便于外部凸轮表面的磨削。

公开(公告)号：US3574304A

公开(公告)日：1971-04-13

申请号：US3574304D

申请日：1969-03-10

Applicant: BRIGGS & STRATTON CORP

Inventor： SANTI JOHN D

IPC: F01L1/32 ,  F02B1/04 ,  F01L1/08 ,  F16K29/00

CPC classification number: F01L1/32 ,  F02B1/04 ,  Y10T74/2101

Abstract: The cam for the exhaust valve has a small lobe that momentarily interrupts closing motion of the valve just before it seats, so that the valve slips rotationally relative to its spring under rotational inertia built up during the preceding part of closing motion and induced by rotation of the moving end of the spring. The profiled cam surface is recessed in the neighborhood of said lobe to engage the tappet only at one side of its axis and thus encourage rotation.