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公开(公告)号：US07089738B1
公开(公告)日：2006-08-15
申请号：US11102271
申请日：2005-04-09
CPC分类号： F02B37/24 , F02B29/0406 , F02M26/05 , F02M26/23 , F02M26/47 , F02M26/48 , F02M26/49 , F02M2026/002 , Y02T10/144
摘要： A system for controlling turbocharger compressor surge includes a turbocharger compressor fluidly coupled to an engine intake manifold, an exhaust gas recirculation (EGR) valve disposed in-line with an EGR conduit fluidly coupled between the engine intake and exhaust manifolds, means for determining a mass flow parameter, a speed sensor producing a speed signal indicative of turbocharger speed, and a control computer configured to determine a mass flow rate surge value, corresponding to a fresh air mass flow rate above which turbocharger compressor surge is avoided, as a function of the speed signal, and to limit the EGR valve position and VGT position as a function of the mass flow parameter and the mass flow rate surge value to maintain exhaust gas flow through the EGR valve at a flow rate below which turbocharger compressor surge is avoided.
摘要翻译： 用于控制涡轮增压器压缩机喘振的系统包括流体耦合到发动机进气歧管的涡轮增压器压缩机，与流体地联接在发动机进气歧管和排气歧管之间的EGR导管配合设置的排气再循环（EGR）阀，用于确定质量 流量参数，产生表示涡轮增压器速度的速度信号的速度传感器，以及控制计算机，其被配置为根据涡流增压器压缩机浪涌被避免的新鲜空气质量流量来确定质量流量浪涌值， 速度信号，并且作为质量流量参数和质量流量浪涌值的函数来限制EGR阀位置和VGT位置，以保持排气在低于该涡轮增压器压缩机喘振的流量下流过EGR阀。
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公开(公告)号：US5586531A
公开(公告)日：1996-12-24
申请号：US563615
申请日：1995-11-28
申请人： David A. Vittorio
发明人： David A. Vittorio
摘要： An improved engine retarder cycle in which the exhaust valve(s) or a dedicated retarder valve is opened during the compression stroke much earlier than in prior art retarder cycles. By opening the retarder valve earlier, the cylinder pressure is not allowed to build to as high a level as in the prior art, thereby requiring less force to push open the retarder valve. Additionally, increased retarder power is generated by increasing the charge of air that is in the cylinder during the compression stroke. This is accomplished by increasing the turbocharger boost by eliminating wasted flow in and out of the exhaust valves. The increased air mass is also created by incorporating a retarder intake event which opens the valve(s) starting at approximately mid-intake stroke and ending in the first half of the compression stroke. The result is increased retarding work and decreased mechanical loading on the engine.
摘要翻译： 改进的发动机减速器循环，其中排气门或专用减速阀在压缩冲程中比现有技术的减速器循环早得多地打开。 通过较早地打开减速阀，气缸压力不能达到与现有技术相同程度的水平，因此需要较小的力推动缓速阀。 此外，通过在压缩冲程期间增加气缸中的空气的电荷来产生增加的减速器功率。 这是通过消除流入和排出废气的浪费来增加涡轮增压器来实现的。 增加的空气质量还通过结合减速器进气事件而产生，该减速器进气事件从大致中进气冲程开始并在压缩冲程的前半段结束开启阀。 结果是增加了减速作用并减少了发动机的机械负荷。
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公开(公告)号：US5937807A
公开(公告)日：1999-08-17
申请号：US050033
申请日：1998-03-30
申请人： Lester L. Peters , David A. Vittorio , P. Douglas Free , Amarjit S. Ghuman , Harold G. Weber , Canden R. Nelson
发明人： Lester L. Peters , David A. Vittorio , P. Douglas Free , Amarjit S. Ghuman , Harold G. Weber , Canden R. Nelson
IPC分类号： F01L13/00
CPC分类号： F01L13/0031 , F01L1/181 , F01L1/26 , F01L13/06
摘要： An exhaust valve system for an internal combustion engine including a turbocharger is provided for effectively increasing the turbocharged boost pressure at low load engine conditions thereby effectively improving engine transient response. The exhaust valve system includes an exhaust valve control device operable in a normal timing mode for permitting normal opening of one or more exhaust valves at a normal opening crank angle, and in an advanced timing mode for advancing the timing of the opening of the exhaust valve to an advanced opening crank angle prior to the normal opening crank angle while maintaining the timing of normal closing of the exhaust valves at a normal closing crank angle. In one embodiment, the exhaust valve control device includes a tappet and an actuating fluid supply which operate to move the tappet between expanded and collapsed states to advance the opening of the exhaust valve while permitting normal exhaust valve lift to be introduced prior to peak exhaust valve lift thereby maintaining the normal peak lift and the normal timing of exhaust valve closure. In a second embodiment, the exhaust valve control device includes a dedicated advanced timing mode rocker lever capable of selectively actuating one of a pair of exhaust valves to create an early opening exhaust event prior to a normal exhaust event.
摘要翻译： 提供一种用于包括涡轮增压器的内燃机的排气门系统，用于在低负载发动机条件下有效地增加涡轮增压增压压力，从而有效地改善发动机瞬态响应。 排气门系统包括排气门控制装置，该排气门控制装置可以在正常定时模式下操作，以允许一个或多个排气门以正常的开启曲柄角正常打开，并且在提前定时模式中，用于使排气门的打开时间延长 在正常的开启曲柄角之前达到先进的开启曲柄角，同时保持排气门在正常的关闭曲柄角处的正常关闭的正时。 在一个实施例中，排气门控制装置包括挺杆和致动流体供应器，其操作以在膨胀和收缩状态之间移动挺杆，以推进排气门的打开，同时允许在峰值排气阀之前引入正常的排气门升程 从而保持正常的峰值升程和排气门关闭的正常时间。 在第二实施例中，排气门控制装置包括专用的高级定时模式摇杆杆，其能够选择性地致动一对排气门中的一个，以在正常排气事件之前产生早期打开排气事件。
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公开(公告)号：US5386809A
公开(公告)日：1995-02-07
申请号：US141064
申请日：1993-10-26
申请人： Steven W. Reedy , David A. Vittorio
发明人： Steven W. Reedy , David A. Vittorio
CPC分类号： F01L13/065 , F02B3/06
摘要： A compression braking system for an internal combustion engine having at least one working piston including a master piston operated by an engine component such as a fuel injector actuating mechanism and a slave piston fluidically connected with the master piston to open an engine exhaust valve wherein a pressure relief valve is provided to prevent excessively high pressure supply fluid from a low pressure supply circuit from reaching the high pressure circuit connecting the master and slave pistons thereby preventing inadvertent and excessive movement of the slave piston and possible damage to the engine. The pressure relief valve is fluidically connected to the low pressure supply circuit upstream of a control valve which separates the low and high fluid circuits and opens to vent fluid from the low pressure circuit while allowing continuous, uninterrupted operation of the engine in the braking mode. The pressure relief valve may include a spring biased check valve normally biased in a closed position and movable into the open position whenever the pressure in the low pressure circuit reaches a predetermined level to maintain the fluid in the low pressure circuit below a predetermined pressure level equivalent to a maximum high pressure level in the high pressure circuit capable of moving the slave piston.
摘要翻译： 一种用于内燃机的压缩制动系统，其具有至少一个工作活塞，其包括由诸如燃料喷射器致动机构的发动机部件操作的主活塞和与主活塞流体连接以打开发动机排气阀的从动活塞，其中压力 提供安全阀以防止来自低压供应回路的过高的压力供应流体到达连接主和从动活塞的高压回路，从而防止从动活塞的意外和过度的运动以及对发动机的可能损坏。 压力释放阀流体连接到控制阀上游的低压供应回路，该控制阀分离低流量回路和高流体回路，并打开以从低压回路排放流体，同时允许发动机在制动模式下连续不间断运行。 压力释放阀可以包括通常偏压在关闭位置的弹簧偏压止回阀，并且只要低压回路中的压力达到预定水平即可将其保持在低压电路的预定压力水平以下 达到能够移动从动活塞的高压回路中的最大高压水平。
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公开(公告)号：US5183018A
公开(公告)日：1993-02-02
申请号：US856579
申请日：1992-03-24
申请人： David A. Vittorio , Steven W. Reedy
发明人： David A. Vittorio , Steven W. Reedy
CPC分类号： F01L13/065 , F01L2105/00 , F02B3/06
摘要： An improved master cylinder for use with an engine compression braking system includes a two-piece telescoping piston which traps a column of fluid therewithin to establish a solid column or piston for a limited length of travel of the piston. Upon achieving a particular predetermined displacement, the fluid column trapped within the two-piece piston is released, thus rapid piston movement is achieved without overtravel which may open exhaust valves of the engine to a distance wherein interference with the piston occurs. The two-piece telescoping piston is actuated in accordance with an injector pushtube or other combinations such as exhaust or intake valve cam/pushtubes.
摘要翻译： 用于发动机压缩制动系统的改进的主缸包括两件式伸缩活塞，其将一列流体捕获在其中以在活塞的有限长度的行程中建立固体柱或活塞。 在实现特定的预定位移时，捕获在两件式活塞内的流体塔被释放，从而实现快速的活塞运动，而不会产生过大的行程，这可能会使发动机的排气门处于与活塞发生干涉的距离。 两件式伸缩活塞根据注射器推杆或其他组合（例如排气阀或进气阀凸轮/推杆）而致动。
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6.发明授权公开(公告)号：US06619261B1
公开(公告)日：2003-09-16
申请号：US10103427
申请日：2002-03-21
申请人： Yue Yun Wang , David A. Vittorio , John F. Wright
发明人： Yue Yun Wang , David A. Vittorio , John F. Wright
IPC分类号： F02M700
CPC分类号： F02D35/024 , F02B29/0406 , F02B29/0493 , F02D41/0065 , F02D41/1447 , F02D41/145 , F02M26/05 , F02M26/10 , F02M26/23 , F02M26/33 , F02M26/47 , F02M26/61
摘要： A system for controlling an operating condition of an internal combustion engine includes a control mechanism responsive to a final control command to establish an engine control parameter, and a control computer configured to estimate a current value of the operating condition as a function of the final control command. The control computer determines an error value as a difference between an operating condition limit and the current value of the operating condition, and determines an operating condition parameter as function of the error value and of the current value of the operating condition. The control computer further determines a control command limit as a function of the operating condition parameter, and determines the final control command as a function of the control command limit and a default control command to thereby limit the operating condition to the operating condition limit.
摘要翻译： 一种用于控制内燃机的运行状况的系统包括响应于最终控制命令以建立发动机控制参数的控制机构，以及控制计算机，被配置为根据最终控制来估计运行状态的当前值 命令。 控制计算机将误差值确定为操作条件极限和操作条件的当前值之间的差，并且确定作为错误值和操作条件的当前值的函数的操作条件参数。 控制计算机还根据操作条件参数确定控制命令限制，并且根据控制命令限制和默认控制命令确定最终控制命令，从而将操作条件限制为操作条件极限。
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7.发明授权
公开(公告)号：US5626116A
公开(公告)日：1997-05-06
申请号：US563333
申请日：1995-11-28
申请人： Steven W. Reedy , David A. Vittorio
发明人： Steven W. Reedy , David A. Vittorio
CPC分类号： F01L13/065 , F01L1/181 , F01L1/08
摘要： A dedicated compression braking system is provided having at least one engine piston reciprocally mounted within a cylinder for cyclical successive compression and expansion strokes and at least one exhaust valve operable to open in a variable timed relationship with an engine piston compression stroke when the engine is operated in a compression braking mode. The braking system includes an independent exhaust valve actuator assembly, including a braking mode rocker lever and a cam lobe for imparting reciprocable movement to the exhaust valve when the engine is operated in the braking mode. The second exhaust valve actuator assembly includes a braking fluid circuit formed in the braking mode rocker lever and a braking fluid valve and three-way solenoid valve mounted on the braking mode rocker lever for controlling the flow of braking fluid in the braking mode rocker lever during compression braking. The dedicated braking system minimizes the size and weight of the engine and also permits maximum freedom in designing and controlling the operation of the braking system independent of other engine components to maximize the efficiency of compression braking.
摘要翻译： 一种专用的压缩制动系统，其具有至少一个发动机活塞，该发动机活塞往复安装在气缸内用于循环的连续的压缩和膨胀冲程，以及至少一个排气门，当发动机运转时可操作地以与发动机活塞压缩冲程以可变的定时关系打开 在压缩制动模式。 制动系统包括独立的排气阀致动器组件，其包括制动模式摇杆和凸轮凸角，当发动机在制动模式下操作时，该凸轮凸轮用于向排气门施加往复运动。 第二排气阀致动器组件包括形成在制动模式摇杆中的制动流体回路和安装在制动模式摇杆上的制动流体阀和三通电磁阀，用于控制制动模式摇杆中制动流体的流动 压缩制动。 专用制动系统使发动机的尺寸和重量最小化，并且还允许在不依赖于其它发动机部件的情况下设计和控制制动系统的操作的最大自由度，以最大化压缩制动的效率。
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