公开(公告)号：US07021279B1

公开(公告)日：2006-04-04

申请号：US10089528

申请日：2000-09-27

申请人： Ekkehard Pott ,  Rudolf Krebs ,  Bernd Stiebels

发明人： Ekkehard Pott ,  Rudolf Krebs ,  Bernd Stiebels

IPC分类号： F02B31/00

CPC分类号： F02D21/08 ,  F01N2570/14 ,  F02B17/005 ,  F02B31/00 ,  F02B2075/125 ,  F02D41/0057 ,  F02D41/006 ,  F02D41/0065 ,  F02D41/3023 ,  F02D2041/0015 ,  F02M26/01 ,  F02M26/23 ,  Y02A50/2344 ,  Y02T10/12 ,  Y02T10/123 ,  Y02T10/146 ,  Y02T10/47

摘要： A direct injection internal combustion engine, especially an Otto engine, is provided with layered lean operation and internal exhaust-gas recirculation. An exhaust-gas aftertreatment for reducing Nox using an Nox storage catalyst is also provided. This combination is to achieve the highest possible exhaust-gas recirculation rates with the lowest HC and Nox emission values. A tumble flow is provided for the incoming fresh gases, which may contain recirculated exhaust gas from external exhaust-gas recirculation. The swirl axis of the incoming fresh gases therefore extends substantially crosswise to the piston movement. This results in an emissions-reducing, optimal mixture inside the cylinder during the layered lean operation.

摘要翻译： 直喷式内燃机，特别是奥托发动机，提供分层稀薄运行和内部废气再循环。 还提供了使用Nox储存催化剂还原Nox的废气后处理。 这种组合是以最低的HC和Nox排放值实现尽可能高的废气再循环率。 为进入的新鲜气体提供滚动流，其可以包含来自外部排气再循环的再循环废气。 因此，进入的新鲜气体的旋转轴线基本上横贯于活塞运动。 这导致在分层稀薄操作期间在气缸内排放减少，最佳混合物。

公开(公告)号：US06666177B1

公开(公告)日：2003-12-23

申请号：US10111200

申请日：2002-04-22

申请人： Bernd Stiebels ,  Ekkehard Pott ,  Leo Spiegel

发明人： Bernd Stiebels ,  Ekkehard Pott ,  Leo Spiegel

IPC分类号： F02D1302

CPC分类号： F02D13/0234 ,  F02D13/0269 ,  F02D15/00 ,  Y02T10/142

摘要： 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.

摘要翻译： 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。

公开(公告)号：US06378486B1

公开(公告)日：2002-04-30

申请号：US09762123

申请日：2001-03-01

申请人： Leo Spiegel ,  Oliver Fladung ,  Michael Lindlau ,  Eduard Lippert ,  Bernd Stiebels ,  Jörg Theobald

发明人： Leo Spiegel ,  Oliver Fladung ,  Michael Lindlau ,  Eduard Lippert ,  Bernd Stiebels ,  Jörg Theobald

IPC分类号： F02B300

CPC分类号： F02B23/104 ,  F02B2075/027 ,  F02B2075/125 ,  F02B2275/48 ,  F02F1/108 ,  F02F1/4214 ,  F02F3/26 ,  F02F2001/245 ,  Y02T10/123 ,  Y02T10/125

摘要： 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.

摘要翻译： 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。