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公开(公告)号：US5029516A
公开(公告)日：1991-07-09
申请号：US587203
申请日：1990-09-24
CPC分类号： F01L9/026 , F01L9/04 , Y10S251/90
摘要： An electronically controllable pneumatically powered valve actuating mechanism for use in an internal combustion engine is disclosed. The engine is of the type having engine intake and exhaust valves with elongated valve stems. The actuator has a power piston reciprocable along an axis and adapted to be coupled to an engine valve and a pneumatic arrangement for moving the piston, thereby causing an engine valve to move in the direction of stem elongation between valve-open and valve-closed positions. The pneumatic arrangement includes a pair of control valves which are movable relative to the piston for selectively supplying high pressure air to the piston. Each control valve includes a thin walled portion having an inner cylindrical surface which slidingly engaging a portion of one of the enlarged diameter cylindrical portions of the piston. The inner cylindrical surface includes an end portion of enhanced strength and reduced inner diameter which is too small to receive the enlarged diameter cylindrical portion of the piston. The piston includes enlarged diameter cylindrical portions which cooperate with the motion of the corresponding control valve to stop the supply of high pressure air to the piston. A pneumatic damping arrangement imparts a first decelerating force to the piston when the engine valve reaches a first separation from one of said valve-open and valve-closed positions to begin reducing engine valve velocity as the engine valve approaches said one position, and imparts a second lesser decelerating force to the piston when the engine valve reaches a second lesser separation from that one position. A resilient member cooperates with and is deformed by the air control valve to prevent the application of piston moving air pressure to the piston when the air control valve is in the closed position, and included is an arrangement for adjustably selecting the amount of deformation of the resilient member when the air valve is in the closed position. An initializer to force the piston to one of its extreme positions upon start up, a pressure regulator, and an arrangement for minimizing surface tension induced valve sticking problems are also disclosed.
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公开(公告)号：US5003938A
公开(公告)日：1991-04-02
申请号：US457014
申请日：1989-12-26
摘要： An electronically controllable pneumatically powered valve actuating mechanism for use in an internal combustion engine is disclosed. The engine is of the type having engine intake and exhaust valves with elongated valve stems. The actuator has a power piston reciprocable along an axis and adapted to be coupled to an engine valve and a pneumatic arrangement for moving the piston. A pneumatic damping arrangement imparts a first decelerating force to the piston when the engine valve reaches a first separation from one of said valve-open and valve-closed positions to begin reducing engine valve velocity as the engine valve approaches said one position, and imparts a second lesser decelerating force to the piston when the engine valve reaches a second lesser separation from that one position. A resilient member cooperates with and is deformed by the air control valve to prevent the application of piston moving air pressure to the piston when the air control valve is in the closed position, and included is an arrangement for adjustably selecting the amount of deformation of the resilient member when the air valve is in the closed position. An initializer to force the piston to one of its extreme positions upon start up, a pressure regulator, and an arrangement for minimizing surface tension induced valve sticking problems are also disclosed.
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公开(公告)号：US4878464A
公开(公告)日：1989-11-07
申请号：US153257
申请日：1988-02-08
CPC分类号： F02D13/0215 , F01L13/0005 , F01L9/026 , F01L9/04 , F02D13/0261 , F02D13/0269 , F01L2201/00 , F02D2013/0296 , F02D2041/001 , Y02T10/142 , Y10T137/86614
摘要： A bistable electronically controlled pneumatically powered transducer for use, for example, as a valve mechanism in an internal combustion engine is disclosed. The transducer armature, an engine valve, for example, is powered by a pneumatic source and includes pneumatic damping and energy recovery as it nears its destination position. The armature is held in each of its extreme positions by a permanent magnet latching arrangement and is released therefrom to be pneumatically driven to the other extreme position by an electromagnetic arrangement which temporarily neutralizes the permanent magnetic field of the latching arrangement. A multiplicity of engine operating modes are also disclosed including operation of an engine in a six stroke cycle mode, and a unique intake valve timing scheme where the intake valve closure is delayed beyond bottom dead center of its associated cylinder with the delay being greater at lower engine speeds and less at higher engine speeds.
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公开(公告)号：US4883025A
公开(公告)日：1989-11-28
申请号：US153262
申请日：1988-02-08
CPC分类号： F01L1/16 , F01L1/462 , F01L9/04 , H01F2007/1669
摘要： A bistable electronically controlled transducer having an armature reciprocable between first and second positions is disclosed including either a stressed spring or compressed air within a closed chamber in the transducer for causing the armature to move, and a permanent magnet latching arrangement for holding the armature in either one of the positions. An electromagnetic arrangement for temporarily neutralizing the effect of the permanent magnet latching arrangement releases the armature to move from one to the other of the positions. The transducer finds particular utility as an actuator mechanism for moving internal combustion engine valves.
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公开(公告)号：US4974495A
公开(公告)日：1990-12-04
申请号：US457015
申请日：1989-12-26
CPC分类号： F01L9/02 , F01L9/04 , Y10T137/86622
摘要： A fast acting valve actuator for actuating an intake or exhaust valve in an internal combustion engine of a type which is hydraulically powered and command triggered is disclosed and includes a cylinder with a power piston having a pair of opposed working surfaces or faces reciprocable within the cylinder along an axis between first and second extreme positions. A cylindrical control valve is located radially intermediate the reservoir and the cylinder, and is movable upon command to alternately supply high pressure fluid from a reservoir of high pressure hydraulic fluid to one face and then the other face of the power piston causing the piston to move from one extreme position to the other extreme position. The cylindrical control valve may be a shuttle valve which is reciprocable along the axis of the power piston between extreme positions with control valve motion along the axis in one direction being effective to supply high pressure fluid to move the piston in the opposite direction. Both the control valve and the piston are stable in both of their respective extreme positions and the control valve is spring biased toward a position intermediate the extreme positions. The latter portion of piston motion during one operation of the valve actuator is effective to cock this spring and bias the control valve preparatory to the next operation.
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公开(公告)号：US4831973A
公开(公告)日：1989-05-23
申请号：US153154
申请日：1988-02-08
IPC分类号： F01L9/04
CPC分类号： F01L9/04 , F01L2009/0451
摘要： A bistable electronically controlled transducer having an armature reciprocable between first and second positions is disclosed including either a stressed spring or compresed air within a closed chamber in the transducer for causing the armature to move, and a permanent magnet latching arrangement for holding the armature in either one of the positions. An electromagnetic repulsion motor overpowers the effect of the permanent magnet latching arrangement releasing the armature to move from one to the other of the positions. The transducer finds particular utility as an actuator mechanism for moving internal combustion engine valves.
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公开(公告)号：US5284116A
公开(公告)日：1994-02-08
申请号：US865152
申请日：1992-04-08
IPC分类号： F02B3/06 , F02B69/06 , F02B75/02 , F02D13/02 , F02D41/06 , F02D41/24 , F02D41/30 , F02P5/15 , F01L25/08 , F02D41/04
CPC分类号： F02D41/06 , F02B69/06 , F02B75/02 , F02D13/0215 , F02D13/0261 , F02D13/028 , F02D35/023 , F02D41/2422 , F02D41/3058 , F02P5/1502 , F02B2075/025 , F02B2075/027 , F02B3/06 , F02D2041/001 , F02D2200/0418 , F02D2400/04 , F02N19/004 , Y02T10/18 , Y02T10/46
摘要： A method of and apparatus for starting and accelerating a vehicle through a range of vehicle speeds during which the vehicle internal combustion engine is operated in a plurality of different operating modes is disclosed. Different operating modes are available during normal operation. Under high demand conditions, the engine may be run as a conventional inefficient but effective throttled engine or converted to operation in a fourth mode as a two-stroke cycle engine. The vehicle management system includes a first read only memory for storing a fixed table of engine operating parameters corresponding to various engine conditions, and a random access second storage means for storing a table of engine operating parameters corresponding to various engine conditions with the second table being initially the same as the first table. The system responds to sensed engine conditions to modify the parameters in the second table and controls the vehicle in accordance with the parameters stored in the second table. Both short term modification to accommodate dynamic changes in the sensed engine conditions and long term modification to compensate for relatively slow changes in the engine and the management system are made to the information in the random access memory. The modifications may be on an overall engine basis or an individual cylinder basis.
摘要翻译： 公开了一种用于通过车辆内燃机以多种不同操作模式操作的车速的范围来启动和加速车辆的方法和装置。 在正常操作期间可以使用不同的操作模式。 在高需求条件下，发动机可以作为传统的低效但有效的节流发动机运转，或者转换为作为二冲程循环发动机的第四模式的操作。 车辆管理系统包括：第一只读存储器，用于存储与各种发动机状况相对应的发动机运行参数的固定表;以及随机存取第二存储装置，用于存储与各种发动机状况对应的发动机运行参数表，第二表是 最初与第一张表相同。 系统响应感测到的发动机状况来修改第二个表中的参数，并根据存储在第二个表中的参数来控制车辆。 对随机存取存储器中的信息进行短期修改以适应感测到的发动机状态的动态变化和长期修改以补偿发动机和管理系统中相对较慢的变化。 这些修改可以在整体引擎基础上或单独的气缸的基础上。
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公开(公告)号：US4794890A
公开(公告)日：1989-01-03
申请号：US21195
申请日：1987-03-03
CPC分类号： F01L9/04 , F01L1/16 , H01F7/088 , H01F7/1646 , H01F2007/1669 , H01F7/124
摘要： A bistable electromechanical transducer is disclosed having an armature reciprocable between first and second positions, a permanent magnet latching arrangement for maintaining the armature in the respective positions, and an electromagnetic repulsion arrangement operable when energized to dislodge the armature from the position in which the armature was maintained and causing it to move to the other of the positions. In a preferred embodiment, the transducer takes the form of an electronically controllable valve mechanism for use in an internal combustion engine and has an engine valve with an elongated valve stem along with the electromagnetic repulsion arrangement for causing the valve to move in the direction of stem elongation between valve-open and valve-closed positions. An arrangement for decelerating the valve as the valve nears the respective valve-open and valve-closed positions includes at least two separate damping arrangements jointly effective to slow valve motion as the valve gets close to said one position. The damping may include dynamic breaking and energy recovery. The mechanism may also include a housing at least partially surrounding the valve stem and an arrangement for circulating the engine liquid coolant through a portion of the housing.
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公开(公告)号：US4109630A
公开(公告)日：1978-08-29
申请号：US687269
申请日：1976-05-17
CPC分类号： F02P7/0675
摘要： An electronic ignition system for an internal combustion engine having a timing signal source comprising an oscillator for providing a carrier signal; an electronic network connected to the oscillator and including a sensor means for providing a reactance which varies as a function of the rotational position of the engine, the network further including a reference means for comparing the reactance of the sensor means and providing modulation of said carrier signal; a detector for demodulating the modulated carrier signal and providing an output signal indicative of a predetermined rotational position of the engine. The output signal is supplied to switching circuitry for switching the primary of an ignition coil and providing a high voltage output pulse at a time synchronized with said predetermined rotational position of the engine.
摘要翻译： 一种用于内燃机的电子点火系统，具有定时信号源，该定时信号源包括用于提供载波信号的振荡器; 连接到所述振荡器的电子网络，并且包括用于提供作为所述发动机的旋转位置的函数而变化的电抗的传感器装置，所述网络还包括用于比较所述传感器装置的电抗并提供所述载体的调制的参考装置 信号; 用于解调调制的载波信号并提供表示发动机的预定旋转位置的输出信号的检测器。 输出信号被提供给用于切换点火线圈的初级线圈的开关电路，并且在与发动机的所述预定旋转位置同步的时间提供高电压输出脉冲。
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