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    Method for synchronizing an oil control valve as a virtual check valve
    1.
    发明申请
    Method for synchronizing an oil control valve as a virtual check valve 有权
    油控阀作为虚拟止回阀同步的方法

    公开(公告)号：US20100042306A1

    公开(公告)日：2010-02-18

    申请号：US12228715

    申请日：2008-08-15

    申请人： Daniel G. Gauthier ,  Jeffrey M. Pfeiffer

    发明人： Daniel G. Gauthier ,  Jeffrey M. Pfeiffer

    IPC分类号： F02D45/00

    CPC分类号： F01L1/344 ,  F01L1/34403 ,  F01L1/3442 ,  F01L2001/0478 ,  F01L2001/34426 ,  F01L2800/00 ,  F01L2800/09 ,  F01L2800/11

    摘要： A standard cam phasing OCV may be employed as a virtual check valve to choke the backflow of oil during negative cam torque conditions, including execution of a duty cycle command in an event-based manner. Normally, OCV duty cycle commands are made on a time basis, but for VCV the duty cycle output change must be synchronized with engine events. A method is disclosed for calculating and delivering the VCV duty cycle so that both time-based and event-based controls are maintained and work together. Phase alignment of response time of the OCV solenoid is based upon cam target wheel edges and is event-based. An initial phase rate vs. phase angle is monitored by the Engine Control Module (ECM). Adjustment of the phase angle is provided to achieve maximum cam position phase rate.

    摘要翻译： 可以使用标准的凸轮定相OCV作为虚拟止回阀，以在负凸轮转矩条件期间阻塞油的回流，包括以事件为基础的方式执行占空比命令。 通常，OCV占空比指令是基于时间进行的，但对于VCV，占空比输出变化必须与发动机事件同步。 公开了一种用于计算和传送VCV占空比的方法，以便基于时间和基于事件的控制被保持并一起工作。 OCV螺线管的响应时间的相位对准基于凸轮目标轮边缘，并且是基于事件的。 发动机控制模块（ECM）监控初始相位速率对相位角。 提供相位角的调整，以实现最大凸轮位置相位速率。

    Model-based method of estimating crankcase oil temperature in an internal combustion engine
    3.
    发明授权
    Model-based method of estimating crankcase oil temperature in an internal combustion engine 有权
    估算内燃机曲轴箱油温的基于模型的方法

    公开(公告)号：US06681172B2

    公开(公告)日：2004-01-20

    申请号：US10079965

    申请日：2002-02-21

    申请人： Jeffrey M. Pfeiffer ,  Joon-Ho Yoo

    发明人： Jeffrey M. Pfeiffer ,  Joon-Ho Yoo

    IPC分类号： G06G770

    CPC分类号： F02D35/025 ,  F01M5/005 ,  F01M2011/1473 ,  F01P11/16 ,  F01P2023/00 ,  F01P2025/08 ,  F01P2025/13 ,  F01P2025/64

    摘要： An improved method of estimating the oil temperature of an internal combustion engine models the net heat flow through the oil during operation of the engine based on known engine operating parameters and integrates the net heat flow to update the oil temperature estimate. The net heat flow components include heat added to the oil due to fuel combustion and heat rejected from the oil to the engine coolant and atmospheric air, and are based on heat transfer coefficients that are adjusted to take into account variations in engine speed, vehicle speed and cooling fan operation.

    摘要翻译： 基于已知的发动机运行参数，一种改进的内燃机的油温估计方法来模拟在发动机运行期间通过油的净热流，并且将净热流积分以更新油温估计。 净热流分量包括由燃料燃烧引起的加入油中的热量和从油向发动机冷却剂和大气空气排出的热量，并且基于被调整以考虑发动机转速，车辆速度变化的传热系数 冷却风扇运行。

    Model-based method of estimating crankcase oil pressure in an internal combustion engine
    4.
    发明授权
    Model-based method of estimating crankcase oil pressure in an internal combustion engine 有权
    估算内燃机曲轴箱油压的基于模型的方法

    公开(公告)号：US06561015B1

    公开(公告)日：2003-05-13

    申请号：US10126496

    申请日：2002-04-19

    申请人： Jeffrey M. Pfeiffer

    发明人： Jeffrey M. Pfeiffer

    IPC分类号： G01M1900

    CPC分类号： G01L11/002 ,  G01M15/09

    摘要： An improved method of estimating the oil pressure of an internal combustion engine utilizes a physical model that takes into account both engine speed and engine oil temperature. The oil pressure is estimated as the sum of static and dynamic components, where the dynamic component includes a first portion that primarily models flow-related effects, and a second portion that primarily models temperature-related effects. The constants and temperature-related variables of the physical model are combined to form one constant calibration value, and two temperature-dependent calibration values. The parameters of the physical model provide a starting point for the calibration values, and the calibration values are then tuned during a calibration procedure so that the estimated oil pressure tracks an accurate measure of the oil pressure during both steady-state and transient engine operating conditions.

    摘要翻译： 一种改进的内燃机油压估计方法利用考虑发动机转速和发动机机油温度的物理模型。 油压估计为静态和动态分量的总和，其中动态分量包括主要模拟流量相关效应的第一部分，以及主要模拟温度相关效应的第二部分。 物理模型的常数和温度相关变量组合形成一个常数校准值和两个温度相关的校准值。 物理模型的参数提供了校准值的起始点，然后在校准过程中调整校准值，以便在稳态和瞬态发动机运行条件期间估计的油压跟踪油压的精确测量 。

    CAMSHAFT POSITION SENSING IN ENGINES WITH ELECTRIC VARIABLE CAM PHASERS
    5.
    发明申请
    CAMSHAFT POSITION SENSING IN ENGINES WITH ELECTRIC VARIABLE CAM PHASERS 有权
    发动机中的CAMSHAFT位置感应与电可变凸轮相机

    公开(公告)号：US20120053817A1

    公开(公告)日：2012-03-01

    申请号：US13215547

    申请日：2011-08-23

    申请人： DANIEL G. GAUTHIER ,  SEBASTIEN STOLTZ-DOUCHET ,  JEFFREY M PFEIFFER

    发明人： DANIEL G. GAUTHIER ,  SEBASTIEN STOLTZ-DOUCHET ,  JEFFREY M PFEIFFER

    IPC分类号： G01M15/04

    CPC分类号： G01M15/06

    摘要： A method is provided for sensing the position of a camshaft in an internal combustion engine having a camshaft phaser for controllably varying the phase relationship between a crankshaft of the internal combustion engine and the camshaft, the camshaft phaser being actuated by an electric motor and having a gear reduction mechanism with a predetermined gear reduction ratio and rotational position means for determining the rotational position of the electric motor. The method includes generating a rotational position signal indicative of the rotational position of the electric motor by using the rotational position means to determine the rotational position of the electric motor and calculating the position of the camshaft based on the rotational position signal and the gear reduction ratio of the gear reduction mechanism.

    摘要翻译： 提供了一种用于感测具有凸轮轴相位器的内燃机中的凸轮轴的位置的方法，用于可控地改变内燃机的曲轴与凸轮轴之间的相位关系，凸轮轴相位器由电动机驱动并具有 具有预定齿轮减速比的齿轮减速机构和用于确定电动机的旋转位置的旋转位置装置。 该方法包括通过使用旋转位置装置产生表示电动机的旋转位置的旋转位置信号，以确定电动机的旋转位置，并基于旋转位置信号和齿轮减速比计算凸轮轴的位置 的减速机构。

    Detection of valve deactivation failure by monitoring exhaust temperature
    6.
    发明授权
    Detection of valve deactivation failure by monitoring exhaust temperature 有权
    通过监测排气温度检测阀门失效故障

    公开(公告)号：US07571047B2

    公开(公告)日：2009-08-04

    申请号：US11888744

    申请日：2007-08-02

    申请人： Jeffrey M. Pfeiffer ,  Jon C. Darrow

    发明人： Jeffrey M. Pfeiffer ,  Jon C. Darrow

    IPC分类号： G06F19/00 ,  F01L1/34 ,  G06F11/30 ,  G01M13/02

    CPC分类号： G01M15/102 ,  F01N11/002

    摘要： An internal combustion engine having valve deactivation capability for at least one cylinder, or for an entire bank of cylinders in a multiple-bank engine, is provided with a temperature probe in the exhaust stream of that cylinder or cylinder bank. The temperature probe is connected to an Engine Control Module programmed to determine the rate of temperature change during valve deactivation, to compare the determined value to an acceptable range of rates, and to signal, when the rate exceeds an acceptable range. When the valves of a cylinder are properly deactivated, the temperature in the exhaust pipe decreases slowly. However, when valve deactivation fails, the cylinders pump non-combusted air from the intake manifold into the exhaust manifold, resulting in a relatively rapid decrease in exhaust temperature. This abnormal rate of temperature decrease thus can be used as an indicator of failure of the VVA system.

    摘要翻译： 具有用于至少一个气缸或多排发动机中的整个气缸的阀停用能力的内燃机在该气缸或气缸组的排气流中设置有温度探头。 温度探头连接到发动机控制模块，发动机控制模块被编程以确定阀停用期间温度变化的速率，将确定的值与可接受的速率范围进行比较，以及当速率超过可接受的范围时发出信号。 当气缸的阀门正确停用时，排气管中的温度会缓慢下降。 然而，当阀门失效时，气缸将进气歧管中的未燃烧的空气泵入排气歧管，导致排气温度相对快速的下降。 这种异常的温度降低率可以用作VVA系统故障的指标。

    Method of bounding cam phase adjustment in an internal combustion engine
    7.
    发明授权
    Method of bounding cam phase adjustment in an internal combustion engine 有权
    在内燃机中限制凸轮相位调节的方法

    公开(公告)号：US06748910B2

    公开(公告)日：2004-06-15

    申请号：US10283756

    申请日：2002-10-30

    申请人： Martin Müller ,  Edward George Himes ,  Jeffrey M. Pfeiffer

    发明人： Martin Müller ,  Edward George Himes ,  Jeffrey M. Pfeiffer

    IPC分类号： F01L134

    CPC分类号： F02D13/0219 ,  F02D13/0261 ,  F02D41/0002 ,  F02D41/006 ,  F02D2041/001 ,  F02D2200/0411 ,  Y02T10/18 ,  Y02T10/42

    摘要： A cam phase control method for an internal combustion engine schedules cam phase to optimize emissions and fuel economy, but bounds the scheduled cam phase for continuous achievement of the desired inlet airflow. The volumetric efficiency required to achieve the desired inlet airflow at a specified intake manifold vacuum is compared to the maximum achievable volumetric efficiency at the specified vacuum. When the required volumetric efficiency is less than the maximum value, the cam phase is controlled according to the lesser of the scheduled cam phase and the highest cam phase for achieving the required volumetric efficiency; when the required volumetric efficiency is equal to or greater than the maximum value, the cam phase is controlled to a setting that maximizes the volumetric efficiency.

    摘要翻译： 用于内燃机的凸轮相位控制方法调度凸轮相位以优化排放和燃料经济性，但限制预定的凸轮相以连续实现期望的入口气流。 将在特定进气歧管真空下实现所需入口气流所需的体积效率与在特定真空下达到的最大容积效率进行比较。 当所需的体积效率小于最大值时，根据预定的凸轮相位和最高凸轮相位中较小的凸轮相位来控制凸轮相位，以实现所需的体积效率; 当所需的体积效率等于或大于最大值时，凸轮相位被控制为最大化容积效率的设定。

    Method of estimating residual exhaust gas concentration in a variable cam phase engine
    8.
    发明授权
    Method of estimating residual exhaust gas concentration in a variable cam phase engine 失效
    估计可变凸轮相位发动机中残余排气浓度的方法

    公开(公告)号：US06550451B1

    公开(公告)日：2003-04-22

    申请号：US10162375

    申请日：2002-06-04

    申请人： Martin Müller ,  Jeffrey M. Pfeiffer

    发明人： Martin Müller ,  Jeffrey M. Pfeiffer

    IPC分类号： F02P500

    CPC分类号： F02D41/0062 ,  F02D2041/001 ,  F02D2041/1433 ,  F02D2041/1437 ,  F02D2200/0411 ,  Y02T10/47

    摘要： A method of estimating the concentration of residual exhaust gas in an internal combustion engine having variable cam phase control is based on engine dynamometer and engine simulator data. Since both the volumetric efficiency and the residual exhaust gas concentration of an engine vary monotonically in response to changes in cam phase, the simulated residual concentration data is deemed to be reliable if the simulated volumetric efficiency data matches volumetric efficiency data determined by engine dynamometer testing. Volumetric efficiency test data is compared to simulated volumetric efficiency data, and the simulation software is tuned until the simulated data matches the test data. At such point, the simulated residual concentration data is deemed to be reliable, and is used to calibrate a model relating residual concentration to cam phase angle, and such model is then used by an engine controller to estimate residual exhaust gas concentration during operation of the engine.

    摘要翻译： 在具有可变凸轮相位控制的内燃机中估计残余排气浓度的方法基于发动机测功机和发动机模拟器数据。 由于发动机的体积效率和残余废气浓度都是随着凸轮相位的变化而单调变化的，如果模拟的容积效率数据与发动机测功机测试确定的体积效率数据相匹配，则认为模拟残留浓度数据是可靠的。 将容积效率测试数据与模拟容积效率数据进行比较，并调整仿真软件，直到模拟数据与测试数据匹配。 在这种情况下，模拟残留浓度数据被认为是可靠的，并且用于校准与残余浓度相关的凸轮相位角度的模型，然后由发动机控制器使用该模型来估计操作期间的残余排气浓度 发动机。

    Method for determining an engine response characteristic
    10.
    发明授权
    Method for determining an engine response characteristic 有权
    确定发动机响应特性的方法

    公开(公告)号：US08650011B2

    公开(公告)日：2014-02-11

    申请号：US12971407

    申请日：2010-12-17

    申请人： Martin Müller ,  Jeffrey M. Pfeiffer

    发明人： Martin Müller ,  Jeffrey M. Pfeiffer

    IPC分类号： G06F7/60 ,  G06F17/10

    CPC分类号： G06F17/175 ,  F02D41/2432 ,  F02D41/2477 ,  F02D2041/001 ,  F02D2200/0411 ,  G05B17/02

    摘要： A method for determining an estimate of a response characteristic that depends on a number of input factors includes developing a mathematical model of the response as a function of the input factors based on a statistical fit of a plurality of measured data points. The method also includes mapping the value of the response characteristic and the input factors at a plurality of conditions. The method combines the mapped data with the mathematical model to produce an estimate of the response characteristic that is more accurate over a range of conditions than either the mapped data or the model taken individually.

    摘要翻译： 用于确定取决于多个输入因子的响应特性的估计的方法包括基于多个测量数据点的统计拟合来开发作为输入因子的函数的响应的数学模型。 该方法还包括在多个条件下映射响应特性的值和输入因子。 该方法将映射数据与数学模型相结合，以产生响应特征的估计，该响应特性在条件范围内比单独采用的映射数据或模型更准确。