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    • 1. 发明授权
    • Fuel evaporative gas and air-fuel ratio control system
    • 燃油蒸发气和空燃比控制系统
    • US5520160A
    • 1996-05-28
    • US295394
    • 1994-08-25
    • Hiroyuki AotaJunya MorikawaOsamu Fukasawa
    • Hiroyuki AotaJunya MorikawaOsamu Fukasawa
    • F02D41/00F02D41/14
    • F02D41/004F02D41/0032
    • A system for solving disturbances in the air-fuel ratio caused by a change in the normal correction factor, and permitting achievement of a highly accurate air-fuel ratio control. Fuel evaporative gas generated in a fuel tank is adsorbed in a canister, and then discharged into an intake pipe of an internal combustion engine. ECU calculates the fuel supply quantity to the internal combustion engine on the basis of the condition in which the internal combustion engine is operating, performs feedback control and learning control of an air-fuel ratio on the basis of a detection signal from an oxygen sensor, and corrects the fuel supply quantity by means of an air-fuel correction factor. ECU also controls fuel injection by an injector by decrement-correcting the fuel supply quantity in response to the quantity of discharged evaporative gas. Furthermore, ECU adjusts, upon decrement correction of the fuel supply quantity in response to the quantity of discharged evaporative gas, the quantity of the decrement correction so as to be proportional to the normal correction factor including the air-fuel ratio correction factor.
    • 一种用于解决由正常校正因子的变化引起的空燃比紊乱的系统,并且允许实现高精度的空燃比控制。 在燃料箱中产生的燃料蒸发气体被吸附在罐中,然后排出到内燃机的进气管中。 ECU根据内燃机运转的条件,根据来自氧传感器的检测信号,对内燃机的燃料供给量进行计算,进行空燃比的反馈控制和学习控制, 并通过空燃比校正因子校正燃料供给量。 ECU还通过根据排出的蒸发气体的量对燃料供给量进行递减校正来控制喷射器的燃料喷射。 此外,ECU响应于排出的蒸发气体的量,根据包括空燃比校正系数的正常校正系数与递减校正系数成比例地减少燃料供给量的校正量来进行调整。
    • 2. 发明授权
    • Air-fuel ratio control apparatus of internal combustion engine
    • 内燃机空燃比控制装置
    • US5400761A
    • 1995-03-28
    • US166993
    • 1993-12-16
    • Osamu FukasawaJunya MorikawaHisashi Iida
    • Osamu FukasawaJunya MorikawaHisashi Iida
    • F02D41/00F02D41/14F02D45/00F02M25/08F02M51/00
    • F02D41/0045F02D41/2445F02D41/2454F02D41/0042
    • An air-fuel ratio control apparatus of an internal combustion engine capable of learning and controlling an air-fuel ratio accurately both in idling and non-idling without being affected by concentration of evaporated fuel. Uniform deviation of an air-fuel ratio is detected before starting purging of the evaporated fuel (steps S133 to S137), air-fuel ratio learning values KGI.sub.0 to KGI.sub.7 and KGS.sub.0 to KGS.sub.7 are stored respectively so that the uniform deviation shows a predetermined value or lower both at idling time and at non-idling time (steps S138 to S142), and air-fuel learning values KG.sub.0 to KG.sub.7 in respective areas including idling are updated or renewed with a value obtained by leveling or averaging air-fuel ratio learning values KGI.sub.0 to KGI.sub.7 and KGS.sub.0 to KGS.sub.7 stored both at idling time and at non-idling time (step S145). Thereafter, purging of the evaporated fuel is started, and area learning of the air-fuel ratio is also executed by air-fuel ratio learning values KG.sub.0 to KG.sub.7 in respective areas.
    • 内燃机的空燃比控制装置能够在不受蒸发燃料浓度的影响的情况下,在空转和非空转时都能够精确地学习和控制空燃比。 在开始吹扫蒸发燃料之前检测空燃比的均匀偏差(步骤S133至S137),分别存储空燃比学习值KGI0至KGI7和KGS0至KGS7,使得均匀偏差显示预定值或 在空转时间和非空转时间下降(步骤S138〜S142),并且通过将空燃比学习值进行调平或平均而获得的值来更新或更新包括怠速的各个区域中的空燃比学习值KG0〜KG7 KGI0至KGI7和KGS0至KGS7都在空闲时间和非空闲时间存储(步骤S145)。 此后,开始吹扫蒸发的燃料,并且还通过各个区域中的空燃比学习值KG0至KG7来执行空燃比的区域学习。
    • 5. 发明授权
    • Controller of in-cylinder injection engine
    • 缸内喷油发动机控制器
    • US07318415B2
    • 2008-01-15
    • US11436692
    • 2006-05-19
    • Osamu Fukasawa
    • Osamu Fukasawa
    • F02D41/04F02D41/38
    • F02D41/3845F02D41/062F02D2200/0604F02D2250/31
    • If a high-pressure pump discharges fuel in an injection waiting period from injection setting to injection start, fuel pressure to occur at injection start time is estimated and a fuel pressure correction coefficient is calculated based on the estimated fuel pressure. If there is no fuel discharge in the injection waiting period, the fuel pressure sensed at the injection setting is regarded as the fuel pressure of the injection start time, and the fuel pressure correction coefficient is calculated based on the sensed fuel pressure. A final injection period is calculated by correcting a basic injection period with the fuel pressure correction coefficient. Thus, fuel pressure correction of the injection period is performed accurately even if actual fuel pressure fluctuates due to the fuel discharge from the high-pressure pump during the injection waiting period.
    • 如果高压泵在从注射设定到注射开始的注射等待期间排出燃料,则估计在注射开始时间发生的燃料压力,并且基于估计的燃料压力计算燃料压力校正系数。 如果在喷射等待期间没有燃料排出,则将在喷射设定下检测到的燃料压力视为喷射开始时间的燃料压力,并且基于检测到的燃料压力计算燃料压力校正系数。 通过用燃料压力校正系数校正基本喷射周期来计算最终喷射周期。 因此,即使实际的燃料压力由于在喷射等待期间从高压泵的燃料排出而波动,也能够准确地进行喷射期间的燃料压力校正。
    • 9. 发明授权
    • Startup controller for in-cylinder injection internal combustion engine
    • 缸内喷油内燃机启动控制器
    • US07318421B2
    • 2008-01-15
    • US11397644
    • 2006-04-05
    • Osamu Fukasawa
    • Osamu Fukasawa
    • F02D41/06F02D41/40F02M7/00
    • F02M63/0225F02D41/062F02D41/3845F02D2200/0604
    • A startup controller calculates a fuel pressure difference across a discharge stroke of a high-pressure pump at an end of an initial discharge after cranking is started. At the injection setting, the startup controller estimates a fuel pressure increment from an injection setting to an injection start based on the fuel pressure difference. The startup controller adds the fuel pressure increment to a fuel pressure sensed at the injection setting to estimate a fuel pressure at the injection start. The startup controller determines whether to perform or to prohibit the injection based on whether the estimated fuel pressure at the injection start is equal to or higher than an injection permission fuel pressure.
    • 启动控制器计算开始起动之后的初始排出结束时的高压泵的排出行程的燃料压力差。 在喷射设定中,启动控制器基于燃料压力差估计从喷射设定到喷射开始的燃料压力增量。 启动控制器将燃料压力增量添加到在喷射设置下感测的燃料压力,以估计喷射开始时的燃料压力。 启动控制器基于喷射开始时的估计燃料压力是否等于或高于喷射允许燃料压力来确定是否执行或禁止喷射。