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38 条记录 (耗时 0.045 秒)

    Process and apparatus for reducing nitrogen oxides in engine emissions
    7.
    发明授权
    Process and apparatus for reducing nitrogen oxides in engine emissions 失效
    减少发动机排放中氮氧化物的方法和装置

    公开(公告)号：US5921076A

    公开(公告)日：1999-07-13

    申请号：US781040

    申请日：1997-01-09

    申请人： Bernd Krutzsch ,  Christian Goerigk ,  Stefan Kurze ,  Gunter Wenninger ,  Walter Boegner ,  Friedrich Wirbeleit

    发明人： Bernd Krutzsch ,  Christian Goerigk ,  Stefan Kurze ,  Gunter Wenninger ,  Walter Boegner ,  Friedrich Wirbeleit

    IPC分类号： B01D53/94 ,  F01N3/08 ,  F01N3/20 ,  F01N13/02 ,  F02B1/04 ,  F01N3/00

    CPC分类号： F01N3/0814 ,  B01D53/9409 ,  B01D53/9495 ,  F01N13/009 ,  F01N3/2066 ,  F01N2240/30 ,  F01N2610/03 ,  F01N2610/04 ,  F02B1/04 ,  Y02T10/24

    摘要： A process and apparatus for reducing the nitrogen oxide content in oxygen-containing emissions is provided, particularly for internal-combustion engines, particularly of diesel engines and directly injecting Otto engines for motor vehicles. The nitrogen oxides contained in the exhaust gas are reduced by a suitable reducing agent, such as hydrogen or hydrocarbons, on a DENOX catalyst. For achieving an improved conversion rate for the nitrogen oxides, a combination of hydrogen and hydrocarbons are used as reducing agents. In different operating ranges of the internal-combustion engine only hydrogen, only hydrocarbons, or hydrogen and hydrocarbons are added. Preferably, for this purpose, the quantity of supplied hydrogen or hydrocarbons is reduced or increased with an increasing engine load and/or catalyst temperature and/or rotational engine speed.

    摘要翻译： 提供了用于降低含氧排放物中的氮氧化物含量的方法和装置，特别是用于内燃机，特别是柴油发动机的内燃机，并直接注入用于机动车辆的奥托发动机。 废气中所含的氮氧化物通过合适的还原剂如氢或烃在DENOX催化剂上被还原。 为了实现氮氧化物的改进转化率，使用氢和烃的组合作为还原剂。 在内燃机的不同工作范围内，只有氢气，仅添加烃或氢气和烃。 优选地，为此目的，随着发动机负荷和/或催化剂温度和/或转速发动机转速的增加，所供应的氢气或碳氢化合物的量减少或增加。

    Temperature-sensitive variation of the compression ratio in pistons having variable compression height
    8.
    发明授权
    Temperature-sensitive variation of the compression ratio in pistons having variable compression height 失效
    具有可变压缩高度的活塞中的压缩比的温度敏感变化

    公开(公告)号：US4979427A

    公开(公告)日：1990-12-25

    申请号：US317912

    申请日：1989-03-03

    申请人： Viktor Pfeffer ,  Friedrich Wirbeleit ,  Klaus Binder

    发明人： Viktor Pfeffer ,  Friedrich Wirbeleit ,  Klaus Binder

    IPC分类号： F02F3/00 ,  F02B75/04 ,  F02D15/02

    CPC分类号： F02B75/044 ,  F05C2251/042

    摘要： The invention relates to a piston having a variable compression height and two control chambers connected to each other through a hydraulic system. In order to achieve better cold-start and warm-up behavior, an oil discharge bore from the upper control chamber into the crankcase is closed by a control slide valve in the cold operating state of the engine. The blockage of the oil discharge produces a great compression height and therefore high compression. The control slide valve is connected to an expansible element which maintains it in this closed position when the engine is cold. As the engine warms up, the expansible element, due to its thermal expansion, pushes the control slide valve out of its closed position, so that the discharge of oil can occur progressively more unthrottled with rising temperature. In the warm operating state of the engine the control slide valve clears the oil discharge duct completely, and an unobstructed discharge of oil is ensured.

    摘要翻译： 本发明涉及具有可变压缩高度的活塞和通过液压系统彼此连接的两个控制室。 为了实现更好的冷启动和预热行为，在上部控制室进入曲轴箱的排油孔在发动机的冷运行状态下由控制滑阀关闭。 排油堵塞产生很大的压缩高度，因此产生高压缩。 控制滑阀连接到可膨胀元件，当发动机冷时，其保持在该关闭位置。 随着发动机的升温，膨胀元件由于其热膨胀，将控制滑阀推出其关闭位置，从而随着温度的升高，油的排放会逐渐变得不节流。 在发动机的暖运行状态下，控制滑阀完全清除排油管，保证排油畅通无阻。

    Variable compression height piston arrangement
    9.
    发明授权
    Variable compression height piston arrangement 失效
    可变压缩高度活塞装置

    公开(公告)号：US4785790A

    公开(公告)日：1988-11-22

    申请号：US118052

    申请日：1987-11-09

    申请人： Viktor Pfeffer ,  Friedrich Wirbeleit

    发明人： Viktor Pfeffer ,  Friedrich Wirbeleit

    IPC分类号： F02B75/04 ,  F02D15/02

    CPC分类号： F02D15/02 ,  F02B75/044

    摘要： An arrangement for the control of the oil feed into a control chamber of a piston with variable compression height for internal-combustion engines comprises a control valve in the longitudinal bore of a connecting rod that is provided with a flow-through bore for the oil supply of the control chamber in the operation of the internal-combustion engine. This flow-through bore is closed as a function of the inertial forces acting in the oil feed. In order to avoid a ceasing of the oil column in the longitudinal bore, the control valve has an additional control bore that is opened only in the starting phase and via which an additional amount of oil is guided from the lubricating oil circuit of the internal-combustion engine into the control chamber, which accelerates the upward control of the piston.

    摘要翻译： 用于控制进入用于内燃机的具有可变压缩高度的活塞的控制室的供油装置的装置包括在连杆的纵向孔中的控制阀，该控制阀设置有用于供油的流通孔 在内燃机运行中的控制室。 该流通孔根据作用于进油中的惯性力而关闭。 为了避免油柱在纵向孔中的停止，控制阀具有仅在起动阶段打开的另外的控制孔，并且通过该控制孔从附加的内部润滑油的润滑油回路引导附加量的油， 内燃机进入控制室，这加速了活塞的向上控制。

    Arrangement for controlling the oil feed to a control chamber of a piston with variable compression height
    10.
    发明授权
    Arrangement for controlling the oil feed to a control chamber of a piston with variable compression height 失效
    用于控制向可变压缩高度的活塞的控制室供油的装置

    公开(公告)号：US4784093A

    公开(公告)日：1988-11-15

    申请号：US118047

    申请日：1987-11-09

    申请人： Viktor Pfeffer ,  Friedrich Wirbeleit

    发明人： Viktor Pfeffer ,  Friedrich Wirbeleit

    IPC分类号： F02B77/00 ,  F01M1/06 ,  F02B75/04 ,  F02D15/02 ,  F02F3/00 ,  F02F3/22

    CPC分类号： F02B75/044

    摘要： The invention relates to a piston with variable compression height, particularly for internal-combustion engines, that consists of an interior piston part to which a connecting rod is coupled, and an exterior piston part that is slidably held at said interior piston part. In this case, the exterior piston, via two control chambers that are supplied with oil from the lubricating oil circuit, supports itself by adherence at the interior piston part, said control chambers being connected by a hydraulic system. In order to, in the process, keep the pressure in the oil feed to one control chamber approximately constant over the whole rotational speed range of the internal-combustion engine, the control chamber is connected to the lubricating oil circuit by means of a non-rotating control oil groove in the connecting rod bearing only in an indicated crank angle range, and/or the oil-carrying grooves and bores in the piston and in the connecting rod are coordinated with one another with respect to their cross-sections.

    摘要翻译： 本发明涉及具有可变压缩高度的活塞，特别是用于内燃机的活塞，其包括连接有连杆的内部活塞部分和可滑动地保持在所述内部活塞部分的外部活塞部件。 在这种情况下，经由从润滑油回路供给油的两个控制室的外部活塞通过在内部活塞部分的粘附而自身支撑，所述控制室通过液压系统连接。 为了在该过程中，在内燃机的整个转速范围内将进油中的压力保持在一个控制室大致恒定的情况下，控制室通过非燃烧状态连接到润滑油回路， 旋转控制油槽在连杆轴承中仅在指定的曲柄角范围内，和/或活塞和连杆中的输油槽和孔相对于它们的横截面彼此配合。