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    • 1. 发明授权
    • Method and apparatus for engine control during auto-ignition combustion
    • 自动点火燃烧过程中发动机控制的方法和装置
    • US07412322B1
    • 2008-08-12
    • US11829351
    • 2007-07-27
    • Rodney B. RaskPaul M. Najt
    • Rodney B. RaskPaul M. Najt
    • G06F17/00F02B17/00F02B5/00
    • F02B17/005F02D41/3035F02D41/3064Y02T10/128
    • 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.
    • 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。
    • 2. 发明授权
    • Method to improve combustion stability in a controlled auto-ignition combustion engine
    • 改善受控自动点火内燃机燃烧稳定性的方法
    • US07802553B2
    • 2010-09-28
    • US11399640
    • 2006-04-06
    • Paul M. NajtTang-Wei KuoJames A. EngRodney B. Rask
    • Paul M. NajtTang-Wei KuoJames A. EngRodney B. Rask
    • F02B51/02
    • F02F3/14F01L3/04F01L2101/02F01L2103/00F02B1/12F02B77/02F05C2251/04F05C2251/048Y02T10/128
    • 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.
    • 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。