公开(公告)号：US06601387B2

公开(公告)日：2003-08-05

申请号：US10010986

申请日：2001-12-05

申请人： Mark Allen Zurawski ,  Phillip F. Rimnac ,  Peter Zagone

发明人： Mark Allen Zurawski ,  Phillip F. Rimnac ,  Peter Zagone

IPC分类号： F02B3344

CPC分类号： F02D41/0072 ,  F02B29/0425 ,  F02B29/0493 ,  F02B37/00 ,  F02B37/24 ,  F02D2041/0075 ,  F02M26/05 ,  F02M26/10 ,  F02M26/16 ,  F02M26/28 ,  F02M26/33 ,  F02M26/47 ,  Y02T10/47

摘要： A system and method for determining EGR flow in a multi-cylinder internal combustion engine include determining specific heat of the exhaust gas based on current engine operating conditions and determining EGR flow rate based on the determined specific heat and a signal provided by a sensor. In one embodiment, a species tracking model is used to determine the amount of various species within the exhaust gas which may include oxygen, nitrogen, carbon dioxide, and water, for example, to determine the current specific heat, which is compared to a reference specific heat for the sensor, the difference being used to adjust the sensor value and determine the EGR mass flow rate. The species tracking model uses a simplified combustion model to estimate the amount of each specie in the exhaust gas based on various engine operating parameters, such as fuel, air/fuel ratio, and turbo boost, for example.

摘要翻译： 用于确定多气缸内燃机中的EGR流量的系统和方法包括基于当前的发动机工作条件确定废气的比热，并且基于所确定的比热和由传感器提供的信号来确定EGR流量。 在一个实施例中，物种跟踪模型用于确定废气中可以包括氧气，氮气，二氧化碳和水的各种物质的量，例如以确定当前的比热，其与参考值 用于传感器的比热，差异用于调节传感器值并确定EGR质量流量。 物种跟踪模型使用简化的燃烧模型来估计例如基于各种发动机操作参数（例如燃料，空气/燃料比和涡轮增压）的废气中的每种物质的量。

公开(公告)号：US06681171B2

公开(公告)日：2004-01-20

申请号：US10023020

申请日：2001-12-18

申请人： Phillip F. Rimnac ,  Ravishankar Ramamurthy ,  Sameer Bhargava

发明人： Phillip F. Rimnac ,  Ravishankar Ramamurthy ,  Sameer Bhargava

IPC分类号： F02M2507

CPC分类号： F02D41/005 ,  F01P2060/02 ,  F02B29/0418 ,  F02B29/0425 ,  F02B29/0493 ,  F02B37/24 ,  F02D2200/0406 ,  F02D2200/0414 ,  F02D2200/0418 ,  F02M26/05 ,  F02M26/10 ,  F02M26/16 ,  F02M26/25 ,  F02M26/28 ,  F02M26/47 ,  Y02T10/146 ,  Y02T10/47

摘要： A system and method for controlling an internal combustion engine to reduce or eliminate formation of EGR condensate monitor current ambient and operating conditions to determine whether conditions are favorable for condensation of EGR gases, and control the engine accordingly to avoid condensation, preferably by increasing the intake manifold temperature. The intake manifold temperature may be increased by redirecting some or all of the EGR flow to avoid the EGR cooler. Alternatively, or in combination, some or all of the charge air may be redirected to bypass the charge air cooler and/or redirected from the outlet of the turbocharger compressor to the intake, effectively increasing the intake air temperature and resulting in a corresponding increase of the intake manifold temperature. Conditions favorable for condensation may be determined based on engine speed and load, ambient temperature, manifold pressure, scheduled or actual EGR flow rate and scheduled or actual air/fuel ratio.

摘要翻译： 用于控制内燃机以减少或消除形成EGR冷凝物的系统和方法监测当前环境和操作条件以确定条件是否有利于EGR气体的冷凝，并且相应地控制发动机以避免冷凝，优选地通过增加进气 歧管温度。 进气歧管温度可以通过重定向一些或所有EGR流来避免EGR冷却器而增加。 或者或组合地，一些或所有增压空气可以被重定向以绕过增压空气冷却器和/或从涡轮增压器压缩机的出口重新定向到进气口，有效地增加进气温度并导致相应增加 进气歧管温度。 有利于冷凝的条件可以根据发动机转速和负荷，环境温度，歧管压力，调度或实际EGR流量以及计划或实际空气/燃料比来确定。

公开(公告)号：US06725848B2

公开(公告)日：2004-04-27

申请号：US10052013

申请日：2002-01-18

申请人： Ravishankar Ramamurthy ,  Sameer Bhargara ,  Phillip F. Rimnac

发明人： Ravishankar Ramamurthy ,  Sameer Bhargara ,  Phillip F. Rimnac

IPC分类号： F02M2507

CPC分类号： F02D41/005 ,  F02B29/0425 ,  F02D2200/0418 ,  F02M26/05 ,  F02M26/10 ,  F02M26/16 ,  F02M26/28 ,  F02M26/33 ,  F02M26/47 ,  F02M26/50 ,  Y02T10/47

摘要： An exhaust gas recirculation system for a compression ignition engine is provided wherein the exhaust gas recirculation is shut off depending upon the sensed or calculated humidity in the intake manifold relative to the dew point of the exhaust/intake air mixture. The humidity of the exhaust/intake air mixture may be measured in the intake manifold, charge air mixer or the ambient humidity may be sensed. If humidity is measured in the air charge mixer or in the ambient air, other factors such as engine speed and load, intake manifold pressure, EGR flow and air/fuel ratio may be used to calculate the humidity in the intake manifold. When the temperature of the mixture in the intake manifold is less than the dew point of the mixture, the engine control strategy may be shut off the EGR to prevent condensation in the exhaust gas recirculation system or engine.

摘要翻译： 提供了一种用于压缩点火发动机的废气再循环系统，其中废气再循环根据进气歧管中感测或计算的湿度相对于排气/进气混合物的露点而被切断。 排气/进气混合物的湿度可以在进气歧管中测量，可以感测加气空气混合器或环境湿度。 如果在空气充气混合器或环境空气中测量湿度，则可以使用诸如发动机转速和负载，进气歧管压力，EGR流量和空气/燃料比等其他因素来计算进气歧管中的湿度。 当进气歧管中的混合物的温度低于混合物的露点时，发动机控制策略可以关闭EGR以防止废气再循环系统或发动机中的冷凝。

公开(公告)号：US06460522B1

公开(公告)日：2002-10-08

申请号：US09738091

申请日：2000-12-15

申请人： Phillip F. Rimnac

发明人： Phillip F. Rimnac

IPC分类号： F02D2108

CPC分类号： F02D23/00 ,  F02B29/0406 ,  F02B37/24 ,  F02D41/0077 ,  F02M26/05 ,  F02M26/10 ,  F02M26/32 ,  F02M26/54 ,  Y02T10/144

摘要： The present invention provides a method and apparatus for controlling an internal combustion engine. The engine includes a variable flow exhaust gas recirculation (EGR) system. The method includes providing a variable geometry turbocharger (VGT) in communication with the EGR system for controlling exhaust gas recirculation. The geometry of the VGT is varied by adjustably controlling a rotary electric actuator (REA) operatively connected to the VGT. A position-adjustable proportional flow EGR valve is adjusted by adjustably controlling a second rotary electric actuator (REA) operatively connected to the position-adjustable proportional flow valve.

摘要翻译： 本发明提供一种用于控制内燃机的方法和装置。 发动机包括可变排气废气再循环（EGR）系统。 该方法包括提供与EGR系统通信的可变几何涡轮增压器（VGT），用于控制废气再循环。 通过可调节地控制可操作地连接到VGT的旋转电致动器（REA）来改变VGT的几何形状。 通过可调节地控制可操作地连接到位置可调比例流量阀的第二旋转电致动器（REA）来调节位置可调比例流量EGR阀。

公开(公告)号：US06422219B1

公开(公告)日：2002-07-23

申请号：US09724435

申请日：2000-11-28

申请人： Craig Savonen ,  Phillip F. Rimnac ,  Richard M. Avery, Jr.

发明人： Craig Savonen ,  Phillip F. Rimnac ,  Richard M. Avery, Jr.

IPC分类号： F02M2507

CPC分类号： F02D41/0002 ,  F02B37/24 ,  F02D41/0052 ,  F02D41/0065 ,  F02D2041/0017 ,  F02M26/02 ,  F02M26/05 ,  F02M26/10 ,  F02M26/23 ,  F02M26/33 ,  F02M26/34 ,  F02M26/47 ,  F02M26/48 ,  Y02T10/42 ,  Y02T10/47

摘要： A system and method is provided for treating engine exhaust gases produced by an internal combustion engine. The internal combustion engine has an exhaust gas recirculation circuit which diverts engine exhaust gas from an engine exhaust gas manifold to an engine air intake manifold. An exhaust gas recirculation valve is further provided for controlling the amount of engine exhaust gas diverted toward the engine air intake manifold. Additionally, a small meter pump is provided to create a pressure differential sufficient to introduce a finely tunable and controllable amount of engine exhaust gas into the engine air intake manifold.

摘要翻译： 提供了一种用于处理由内燃机产生的发动机废气的系统和方法。 内燃机具有将发动机废气从发动机排气歧管转移到发动机进气歧管的废气再循环回路。 还设置有排气再循环阀，用于控制朝向发动机进气歧管转向的发动机排气量。 此外，提供一个小型计量泵以产生足以将精细可调和可控量的发动机废气引入发动机进气歧管中的压力差。