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    • 1. 发明授权
    • Air-fuel ratio control device for internal combustion engine
    • 内燃机空燃比控制装置
    • US5485826A
    • 1996-01-23
    • US217109
    • 1994-03-24
    • Akira OhataHiroshi Sawada
    • Akira OhataHiroshi Sawada
    • F01N3/20F01N11/00F02D41/02F02D41/04F02D41/14F02D41/34
    • F02D41/047F01N11/007F02D41/0295F02D41/1401F01N2550/02F02D2041/1415F02D2041/1423F02D2041/1431F02D2041/1433F02D2200/0402F02D2200/0814Y02T10/22Y02T10/47
    • An air-fuel ratio control device for an internal combustion engine having an intake passage and an exhaust passage with a three way catalytic converter. The device comprises a fuel injector for injecting fuel and an air-fuel ratio detector for detecting an air-fuel ratio in the engine cylinder, which is arranged in the exhaust passage upstream of the three way catalytic converter. A first estimation device estimates an amount of intake air actually fed into the engine cylinder. A first decision device decides a target amount of fuel which must be fed into the engine cylinder to realize the stoichiometric air-fuel ratio, on the basis of the amount of intake air estimated by the first estimation device. A second estimation device estimates an amount of fuel actually fed into the engine cylinder, on the basis of the air-fuel ratio detected by the air-fuel ratio detector, and the amount of intake air estimated by the first estimation device. A second decision device decides an amount of fuel actually injected by the fuel injector such that a difference between the amount of fuel estimated by the second estimation device and the target amount of fuel decided by the first decision device, and a time integration value of the difference are made to converge to "0" at the same time.
    • 一种具有进气通道和具有三元催化转化器的排气通道的内燃机的空燃比控制装置。 该装置包括用于喷射燃料的燃料喷射器和用于检测发动机气缸中的空燃比的空燃比检测器,其设置在三元催化转化器上游的排气通道中。 第一估计装置估计实际进料到发动机气缸中的进气量。 第一判定装置基于由第一估计装置估计的进气量,决定必须供给到发动机气缸中的目标燃料量以实现理论空燃比。 第二估计装置基于由空燃比检测器检测的空燃比和由第一估计装置估计的进气量来估计实际进料到发动机气缸中的燃料量。 第二判定装置决定由燃料喷射器实际喷射的燃料量,使得由第二估计装置估计的燃料量与由第一判定装置决定的目标燃料量之间的差和 差异同时收敛于“0”。
    • 4. 发明授权
    • Inter-cylinder air-fuel ratio imbalance determination apparatus for internal combustion engine
    • 用于内燃机的缸内空燃比不平衡确定装置
    • US08560208B2
    • 2013-10-15
    • US13505849
    • 2009-11-05
    • Hiroshi MiyamotoYasushi IwazakiHiroshi Sawada
    • Hiroshi MiyamotoYasushi IwazakiHiroshi Sawada
    • B60T7/12
    • F02D41/0085F02D41/0065F02D41/1454Y02T10/47
    • An inter-cylinder air-fuel ratio imbalance determination apparatus (determination apparatus) according to the present invention obtains, as an “EGR supplying state imbalance determination parameter”, a value corresponding to a differential value d(abyfs)dt of a detected air-fuel ratio abyfs represented by an output value of an air-fuel ratio sensor when an EGR gas is being supplied, and obtains, as an “EGR stop state imbalance determination parameter”, a value corresponding to a differential value d(abyfs)dt when an EGR gas supply is being stopped. The determination apparatus obtains an “EGR-causing imbalance determination parameter Pegr” by subtracting the EGR stop state imbalance determination parameter Poff from the EGR supplying state imbalance determination parameter Pon, and determines that an inter-cylinder air-fuel ratio imbalance state has occurred due to the supply of the EGR gas when the parameter Pegr is larger than a threshold Pegrth.
    • 根据本发明的气缸内空燃比不平衡判定装置(判定装置),作为“EGR供给状态不平衡判定参数”,获得与检测到的空气 - 燃料比不平衡判定装置的差分值d(abyfs)dt对应的值, 在EGR气体供给时由空燃比传感器的输出值表示的燃料比abyfs,作为“EGR停止状态不平衡判定参数”,获得与差分值d(abyfs)dt对应的值 正在停止EGR气体供应。 确定装置通过从EGR供应状态不平衡确定参数Pon中减去EGR停止状态不平衡确定参数Poff而获得“EGR导致不平衡确定参数Pegr”,并且确定缸间空燃比不平衡状态已经发生 当参数Pegr大于阈值Pegrth时,供应EGR气体。
    • 8. 发明授权
    • Mechanical seal sliding member, and mechanical seal
    • 机械密封滑动件,机械密封
    • US08360436B2
    • 2013-01-29
    • US12812033
    • 2009-01-06
    • Yoshihiro TeshimaHiroshi Sawada
    • Yoshihiro TeshimaHiroshi Sawada
    • F16J15/34
    • F16J15/3424
    • The present invention provides a mechanical seal sliding member with high lubricating characteristics, in which the coefficient of friction and the temperature of sliding surfaces are lowered and stabilized without excessive leakage. In the mechanical seal sliding member of the present invention, on the sliding surface 2, a plurality of grating sections 5 are formed separately in each of which a plurality of linear shape ridge portions parallel to each other are formed in a predetermined region with a predetermined pitch. The linear shape ridge portions of the plurality of grating sections are formed as inclined at a predetermined angle to a sliding direction of the sliding surfaces 2. Such periodic structure can improve the lubricating characteristics for lubrication. By irradiating a linearly polarized femtosecond laser with irradiating energy adjacent to a process threshold level to a material surface, a fine periodic structure with a cycle interval comparable with a laser wavelength and with a ridge depth half or less than the laser wavelength can be formed by a self-structuring manner.
    • 本发明提供一种具有高润滑特性的机械密封滑动构件,其中摩擦系数和滑动面的温度降低并稳定而没有过多的泄漏。 在本发明的机械密封滑动部件中,在滑动面2上分别形成多个光栅部5,每个光栅部5分别形成有规定区域的多个直线状的脊状部, 沥青。 多个格栅部的直线形状的脊部形成为与滑动面2的滑动方向成预定角度倾斜。这种周期性结构可以提高润滑的润滑特性。 通过用材料表面照射具有与过程阈值水平相邻的能量的线性偏振飞秒激光,可以通过与激光波长相当的周期间隔和具有与激光波长一半或更小的脊深度的精细周期性结构来形成微小的周期性结构, 一种自我组织的方式。