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    • 1. 发明授权
    • Digital signal processing for linearization of small input signals to a
tri-state power switch
    • 数字信号处理,用于将小输入信号线性化到三态电源开关
    • US5617058A
    • 1997-04-01
    • US556615
    • 1995-11-13
    • Andrew A. AdrianMichael S. DanielsonDavid B. MeyersLeo Spiegel
    • Andrew A. AdrianMichael S. DanielsonDavid B. MeyersLeo Spiegel
    • H03F1/32H03F3/217H03F3/38
    • H03F1/3264H03F3/217H03F2200/331
    • An all digital switching amplifier wherein linearization of the power switch is accomplished solely by using three states. A small, fixed width, bi-state compensating carrier waveform is added to the leading or training edges of an oversampled main input pulse producing a compensated composite waveform. This compensating carrier linearizes output from a power switch by effecting common mode cancellation of switch time errors. Output pulse width combinations for the compensating carrier are obtained from a look-up table stored in memory. A correction mechanism is implemented to correct for harmonic distortion that is dependent on the modulation level or index and results from the compensating carrier modulation. The correction mechanism applies the inverse of the modulation induced distortion to the oversampled compensated composite input signal to null distortion products resulting from the modulation scheme used to apply the small carrier to linearize the performance of the tri-state power switch. Digital timing control of the power switch's deadband ensures accuracy of the timing and sequence in which individual switches within the power switch H-bridge are turned off and turned on, so as to preclude a short circuit across the power supply. A high speed clock used in linearizing the power switch provides a timing reference to generate the necessary deadband timing delays and pulse width increments. The output bridge uses enhancement mode MOSFETs.
    • 一种全数字开关放大器,其中功率开关的线性化仅通过使用三种状态完成。 将小的,固定宽度的双态补偿载波波形添加到过采样主输入脉冲的前沿或训练边缘,产生补偿复合波形。 该补偿载波通过实现共模消除开关时间误差来线性化电力开关的输出。 用于补偿载体的输出脉冲宽度组合从存储在存储器中的查找表获得。 执行校正机制来校正取决于调制电平或指标的谐波失真以及来自补偿载波调制的结果。 校正机制将调制诱发失真的逆向应用于过采样补偿复合输入信号,由用于应用小载波的调制方案产生的零失真产物使三态功率开关的性能线性化。 电源开关死区的数字定时控制可确保电源开关H桥内的各个开关关断和接通的时序和顺序的精度,以防止电源短路。 用于线性化功率开关的高速时钟提供定时参考,以产生必要的死区定时延迟和脉冲宽度增量。 输出桥使用增强型MOSFET。
    • 8. 发明授权
    • Method for operating an internal combustion engine comprising at least one working piston
    • 用于操作包括至少一个工作活塞的内燃机的方法
    • US06666177B1
    • 2003-12-23
    • US10111200
    • 2002-04-22
    • Bernd StiebelsEkkehard PottLeo Spiegel
    • Bernd StiebelsEkkehard PottLeo Spiegel
    • F02D1302
    • F02D13/0234F02D13/0269F02D15/00Y02T10/142
    • A method for operating an internal combustion engine with at least one working piston with a variable compression ratio, which can be changed as a function of an operating state of the internal combustion engine, the method including the steps of: detecting, with a knock sensor, when the compression ratio is too high; reducing the compression ratio (V) when the knock limit (L) is at least reached by a first, predetermined value (V1), which is a function of the operating state, over a first, predetermined time period (t1-t0); subsequently increasing the compression ratio (V) by a second, predetermined value (V2) over a second, predetermined time period (t2-t1) until the knock limit (L) is at least reached again; and determining at least one of the first predetermined value (V1), the first time period (t1-t0), the second predetermined value (V2), and the second time period (t2-t1) as a function of load demand on the internal combustion engine.
    • 一种操作内燃机的方法,所述内燃机具有可变压缩比的至少一个工作活塞,所述工作活塞可根据所述内燃机的运行状态而改变,所述方法包括以下步骤:用爆震传感器 当压缩比过高时; 当在第一预定时间段(t1-t0)至少达到作为操作状态的函数的第一预定值(V1)时,降低压缩比(V); 随后在第二预定时间段(t2-t1)上将压缩比(V)增加第二预定值(V2),直到再次至少达到爆震极限(L); 以及根据所述第一预定值(V1),所述第一时间段(t1-t0),所述第二预定值(V2)和所述第二时间段(t2-t1)中的至少一个来确定所述第一预定值 内燃机。
    • 10. 发明授权
    • Four-stroke internal combustion engine with direct injection
    • 直喷式四冲程内燃机
    • US06378486B1
    • 2002-04-30
    • US09762123
    • 2001-03-01
    • Leo SpiegelOliver FladungMichael LindlauEduard LippertBernd StiebelsJörg Theobald
    • Leo SpiegelOliver FladungMichael LindlauEduard LippertBernd StiebelsJörg Theobald
    • F02B300
    • F02B23/104F02B2075/027F02B2075/125F02B2275/48F02F1/108F02F1/4214F02F3/26F02F2001/245Y02T10/123Y02T10/125
    • The invention relates to a four stroke internal combustion engine with applied ignition, wherein fuel is directly injected into a combustion chamber by means of an injector. Said engine comprises at least one admission channel with an admission valve and at least one exhaust channel with an exhaust valve, the admission valve and the exhaust valve being placed on opposite sides of the combustion chamber and the injector being placed on the admission valve side. Said engine also comprises a cavity formed in a piston top. A piston exhibits a central longitudinal axis extending in the direction of displacement of said piston. The cavity is placed on the admission valve side and exhibits, relatively to said admission valve and the injector, a marginal area forming the highest point of the piston top so that an airflow originating in the appropriately designed admission channel and penetrating into the combustion chamber through the admission valve and an injection jet originating in the injector and penetrating into the combustion chamber enter the cavity at opposite points.
    • 本发明涉及一种具有应用点火的四冲程内燃机,其中通过喷射器将燃料直接喷射到燃烧室中。 所述发动机包括具有入口阀的至少一个进入通道和具有排气阀的至少一个排气通道,所述进气阀和排气阀被放置在所述燃烧室的相对侧上,并且所述喷射器被放置在所述入口阀侧。 所述发动机还包括形成在活塞顶部的空腔。 活塞表现出沿所述活塞位移方向延伸的中心纵向轴线。 空腔被放置在入口阀侧并且相对于所述入口阀和注射器呈现出形成活塞顶部最高点的边缘区域,使得源自适当设计的进入通道的气流并且穿过燃烧室通过 入口阀和源自喷射器并且穿透入燃烧室的喷射射流在相对的位置进入空腔。