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    • 61. 发明授权
    • Fuel injection control system for internal combustion engine
    • 内燃机燃油喷射控制系统
    • US6058905A
    • 2000-05-09
    • US108409
    • 1998-07-01
    • Hatsuo NagaishiTakamasa UedaHiroshi IwanoYuki Nakajima
    • Hatsuo NagaishiTakamasa UedaHiroshi IwanoYuki Nakajima
    • F02D33/00F02D41/30F02D41/40F02B17/00
    • F02D41/307F02D33/00F02D41/3029F02D41/402F02D2041/389Y02T10/128Y02T10/44
    • A fuel injection control system for a cylinder direct injection spark-ignition internal combustion engine judges a homogeneous charge combustion condition which requires homogeneous charge combustion and a stratified charge combustion condition which requires stratified charge combustion, in accordance with an engine operating condition. Fuel is supplied on an intake stroke so as to form a rich equivalent ratio in the homogeneous charge combustion, and fuel is supplied on a compression stroke so as to form a lean equivalent ratio in the stratified charge combustion, with the rich equivalent ratio being richer in fuel than the lean equivalent ratio. The system then gradually changes over an equivalent ratio within a range between the rich and lean equivalent ratios when engine operation is changed over between the homogeneous charge combustion condition and the stratified charge combustion condition. The system then injects first and second quantities of fuel into a cylinder of the engine respectively on intake and compression strokes in each cycle of the cylinder at least at a predetermined time during a time period in which the equivalent ratio is gradually changed over.
    • 用于气缸直喷式火花点火内燃机的燃料喷射控制系统根据发动机工作条件判断需要均匀充气燃烧的均匀充量燃烧条件和需要分层充气燃烧的分层充气燃烧条件。 在进气冲程中供给燃料以在均匀充气燃烧中形成丰富的当量比,并且在压缩冲程中供应燃料,以便在分层充气燃烧中形成稀薄当量比,富当量比更丰富 在燃料中比稀薄当量比。 当在均质充气燃烧条件和分层充气燃烧条件之间改变发动机运转时,系统在丰富和稀薄当量比之间的范围内逐渐变化超过当量比。 至少在等效比逐渐改变的时间段内,至少在预定的时间,系统分别在气缸的每个循环的进气和压缩冲程中将第一和第二数量的燃料分别注入发动机气缸中。
    • 64. 发明授权
    • Engine air-fuel ratio controller
    • 发动机空燃比控制器
    • US5765533A
    • 1998-06-16
    • US840471
    • 1997-04-18
    • Yuki Nakajima
    • Yuki Nakajima
    • F02D41/04F02M51/00
    • F02D41/107F02D41/0087F02D41/047F02D2200/021F02D41/1454
    • In engine feedback control, a target air-fuel ratio corresponding amount is computed according to engine running conditions. A steady state deposition amount is also computed according to the target air-fuel ratio corresponding amount and engine running conditions. A difference between the steady state deposition amount and the deposition amount at that time is calculated, and a deposition rate is computed based on a quantity proportion. A basic injection amount is corrected by the target air-fuel ratio corresponding amount, and this corrected value is again corrected by the deposition rate so as to calculate a final injection amount. As the steady state deposition amount varies according to the target air-fuel ratio corresponding amount according to this invention, overrichness or overleanness due to insufficiency of the transient correction amount when the target air-fuel ratio corresponding amount is changed, is prevented.
    • 在发动机反馈控制中,根据发动机运转条件计算目标空燃比对应量。 还根据目标空燃比对应量和发动机运行条件计算稳态沉积量。 计算稳态沉积量与此时的沉积量之间的差异,并且基于数量比例计算沉积速率。 通过目标空燃比对应量校正基本喷射量,并且通过沉积速率再次校正该校正值,以计算最终喷射量。 由于稳态沉积量根据本发明的目标空燃比对应量而变化,因此防止了当目标空燃比对应量改变时由于瞬时校正量不足引起的过度饱和或过饱和。