Method and apparatus for engine control during auto-ignition combustion
    3.
    发明授权
    Method and apparatus for engine control during auto-ignition combustion 有权
    自动点火燃烧过程中发动机控制的方法和装置

    公开(公告)号:US07412322B1

    公开(公告)日:2008-08-12

    申请号:US11829351

    申请日:2007-07-27

    IPC分类号: G06F17/00 F02B17/00 F02B5/00

    摘要: The invention comprises an engine system that is selectively operative in an auto-ignition combustion mode. A control module monitors engine operating states and control engine operation. A control subsystem controls engine operation based upon the monitored engine operating states. The control subsystem operates the engine in the auto-ignition combustion mode, and determines an effective temperature of the cylinder structure of the internal combustion engine based upon the engine operating conditions. An engine operating point is determined. A feed-forward control scheme is executed based upon the effective temperature of the cylinder structure and the engine operating point. The effective temperature of the cylinder structure is determined by monitoring engine power for an elapsed period of time.

    摘要翻译: 本发明包括一种选择性地以自动点火燃烧模式操作的发动机系统。 控制模块监控发动机的运行状态并控制发动机的运行。 控制子系统基于监控的发动机运行状态控制发动机运行。 控制子系统在自动点火燃烧模式下操作发动机,并且基于发动机工作条件来确定内燃机的气缸结构的有效温度。 确定发动机工作点。 基于气缸结构和发动机工作点的有效温度执行前馈控制方案。 气缸结构的有效温度通过监测发动机功率经过一段时间来确定。

    Method to improve combustion stability in a controlled auto-ignition combustion engine
    4.
    发明授权
    Method to improve combustion stability in a controlled auto-ignition combustion engine 有权
    改善受控自动点火内燃机燃烧稳定性的方法

    公开(公告)号:US07802553B2

    公开(公告)日:2010-09-28

    申请号:US11399640

    申请日:2006-04-06

    IPC分类号: F02B51/02

    摘要: A method to control combustion in an HCCI engine, to mitigate effects of combustion chamber deposits is detailed. The method comprises applying a specific surface coating to a combustion chamber surface. The surface coating has thermal properties substantially similar to the combustion chamber deposits. The thermal properties preferably include a) thermal conductivity, b) heat capacity, and c) thermal diffusivity. Applying a surface coating results in a reduction of combustion variability due to variation in combustion chamber deposits, and an improvement on combustion stability at low loads due to reduced heat loss. A preferred thermally insulating surface coating includes thermal parameters of a heat capacity in a range of 0.03×106 J/m3-K to 2.0×106 J/m3-K; a thermal conductivity in a range of 0.25 W/m-K to 2.5 W/m-K; and, a thermal diffusivity in a range of 1×10−7 m2/s to 8×10−6 m2/s.

    摘要翻译: 详细描述了一种控制HCCI发动机燃烧的方法,以减轻燃烧室沉积物的影响。 该方法包括将特定的表面涂层施加到燃烧室表面。 表面涂层具有与燃烧室沉积物基本相似的热性质。 热性质优选包括a)热导率,b)热容量,和c)热扩散率。 施加表面涂层导致由于燃烧室沉积物的变化而导致的燃烧变异性的降低,以及由于热损失减少而在低负载下的燃烧稳定性的改善。 优选的绝热表面涂层包括在0.03×10 6 J / m 3 -K至2.0×10 6 J / m 3 -K范围内的热容的热参数; 在0.25W / m-K至2.5W / m-K的范围内的热导率; 并且在1×10 -7 m 2 / s至8×10 -6 m 2 / s的范围内的热扩散率。

    Method and apparatus to operate a homogeneous charge compression-ignition engine
    6.
    发明授权
    Method and apparatus to operate a homogeneous charge compression-ignition engine 有权
    操作均质充气压缩点火发动机的方法和装置

    公开(公告)号:US07246597B2

    公开(公告)日:2007-07-24

    申请号:US11398776

    申请日:2006-04-06

    IPC分类号: F02B9/04

    摘要: A method and apparatus for controlling engine operation to compensate for effects of combustion chamber deposits (CCDs) on combustion in a controlled auto-ignition engine is presented. Control methodologies comprise operation of variable valve actuation, fuel injection, spark timing, and intake air and coolant temperature to dynamically compensate for the effect of CCDs. A sensitivity to core gas temperature and chamber wall thermal conditions is shown, which is correlatable to in-cylinder CCD formation. Intake charge or coolant temperature control can be used to compensate for CCD effects. An engine control scheme relies upon a parametric input that quantifies instantaneous CCD formation in the combustion chamber. The result is further applicable to control pre-ignition in a conventional spark-ignition engine.

    摘要翻译: 提出了一种用于控制发动机操作以补偿燃烧室沉积物(CCD)对受控自动点火发动机燃烧的影响的方法和装置。 控制方法包括可变阀致动,燃料喷射,火花正时以及进气和冷却剂温度的操作,以动态补偿CCD的影响。 显示了对核心气体温度和室壁热条件的敏感性,这与缸内CCD形成有关。 进气充液或冷却液温度控制可用于补偿CCD效应。 发动机控制方案依赖于量化燃烧室中瞬时CCD形成的参数输入。 结果进一步适用于在常规火花点火发动机中控制预点火。

    Variable swirl inlet port
    7.
    发明授权
    Variable swirl inlet port 失效
    可变涡流入口

    公开(公告)号:US4827883A

    公开(公告)日:1989-05-09

    申请号:US181895

    申请日:1988-04-15

    IPC分类号: F02B31/06

    CPC分类号: F02B31/06 Y02T10/146

    摘要: An engine with a cylinder inlet port controlled by a poppet valve has a flow directing vane on a shaft aligned with the valve stem upstream in the direction of flow. The vane is movable between a position aligned with the valve stem in which free flow is allowed and an angled position of less than 90.degree. to one side of the port whereby maximum charge swirl is obtained in the cylinder.

    摘要翻译: 具有由提升阀控制的气缸入口的发动机具有在轴向上沿流动方向与阀杆对准的轴上的导流叶片。 叶片可以在允许自由流动的与阀杆对准的位置和小于90°到端口一侧的倾斜位置之间移动,由此在气缸中获得最大的充气涡流。