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公开(公告)号：US6138621A
公开(公告)日：2000-10-31
申请号：US257370
申请日：1999-02-25
CPC分类号： F01L9/025 , F01L1/16 , F01L2001/34446
摘要： An internal combustion engine having a hydraulic system for valve variable actuation and a hydraulic braking device for braking the valve in the final stage of its closing travel. A passage is provided for excluding the above mentioned braking when the engine is in operative conditions in which the fluid used in the device has a viscosity greater than a predetermined value.
摘要翻译： 具有用于阀可变致动的液压系统的内燃机和用于在其关闭行程的最后阶段制动阀的液压制动装置。 当发动机处于使用在装置中的流体具有大于预定值的粘度的操作条件时，提供通道以排除上述制动。
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公开(公告)号：US06325028B1
公开(公告)日：2001-12-04
申请号：US09672023
申请日：2000-09-29
IPC分类号： F01L116
CPC分类号： F01L9/021 , F01L2001/34446
摘要： In an internal combustion engine having a hydraulic system for valve variable actuation and a hydraulic braking device for slowing down the valve during the final portion of its closing travel, this hydraulic braking device is arranged so as to be substantially insensitive to variations in viscosity of the fluid resulting from variations of the temperature.
摘要翻译： 在具有用于阀可变致动的液压系统的内燃机和用于在其关闭行程的最后部分期间减慢阀的液压制动装置，该液压制动装置被布置成对于 由温度变化引起的流体。
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公开(公告)号：US6053136A
公开(公告)日：2000-04-25
申请号：US235307
申请日：1999-01-22
CPC分类号： F01L9/025 , F01M5/025 , F01L2001/34446 , F01L2013/0094
摘要： A variable valve actuating system for an internal combustion engine includes an auxiliary pressure accumulator having a one-way type of operation, provided with pawl-like stop means to hold a piston at a position reached due to an increase of pressure within the chamber of the accumulators, against the action of return spring means. When the engine is started, the stop means are deactivated.
摘要翻译： 用于内燃机的可变气门驱动系统包括具有单向操作类型的辅助压力蓄能器，其具有棘爪状止动装置，以将活塞保持在由于室内的压力增加而达到的位置 蓄能器，反对弹簧的作用手段。 当发动机启动时，停止装置被停用。
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公开(公告)号：US06792905B2
公开(公告)日：2004-09-21
申请号：US10351202
申请日：2003-01-24
IPC分类号： F01L1308
CPC分类号： F02B75/16 , F01L13/085 , F01L2101/00 , F02B2275/22
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US06742491B1
公开(公告)日：2004-06-01
申请号：US10322091
申请日：2002-12-17
申请人： Giuseppe Ghelfi , Paolo Mion , Stefano Albanello , Maurizio Borio
发明人： Giuseppe Ghelfi , Paolo Mion , Stefano Albanello , Maurizio Borio
IPC分类号： F01C102
CPC分类号： F04C2/00
摘要： The present invention provides a lubrication system for small internal combustion engines. In a first aspect, a helical oil pump includes a helical insert which is disposed within a bore in the engine camshaft and is rotationally fixed with respect to the crankcase. During running of the engine, rotation of the camshaft draws oil from the oil sump upwardly through the bore in the camshaft and around the helical insert to provide lubrication oil directly to the upper camshaft bearing and to the upper crankshaft bearing. In another aspect, an impeller oil pump includes a pump chamber defined between the camshaft gear and a pump body which is rotationally fixed with respect to the crankcase and in communication with the oil sump. An impeller assembly mounted on the camshaft is disposed within the pump chamber, and draws oil from the oil sump into the pump chamber. The oil is forced outwardly of the pump chamber through an opening in the camshaft gear in the form of a stream of pressurized oil which is directed toward different locations within the crankcase as the camshaft gear rotates with the camshaft.
摘要翻译： 本发明提供一种小型内燃机的润滑系统。 在第一方面，螺旋式油泵包括螺旋式插入件，该螺旋式插入件设置在发动机凸轮轴的孔内并相对于曲轴箱旋转地固定。 在发动机运行期间，凸轮轴的旋转将油底部的油从油槽中向上通过凸轮轴中的孔并且绕着螺旋形插入件，直接向上凸轮轴轴承和上曲轴轴承提供润滑油。 在另一方面，一种叶轮油泵包括限定在凸轮轴齿轮与泵体之间的泵室，该泵体相对于曲轴箱旋转地固定并与油底壳连通。 安装在凸轮轴上的叶轮组件设置在泵室内，并将油从油槽吸入泵室。 当凸轮轴齿轮与凸轮轴一起旋转时，油通过凸轮轴齿轮中的开口被强制向外，其形式为加压油流，该加压油流向曲轴箱内的不同位置。
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