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    • 7. 发明授权
    • Apparatus and method for diagnosing presence or absence of breakage in
electromagnetic coil means applicable to breakage diagnosis for
stepping motor
    • 用于诊断电磁线圈中存在或不存在破损的装置和方法,适用于步进电机的断裂诊断
    • US5572142A
    • 1996-11-05
    • US434719
    • 1995-05-04
    • Hirotada Muraki
    • Hirotada Muraki
    • G01R31/06G01R31/02
    • G01R31/346
    • In an apparatus and method for diagnosing presence of absence of a (wire) breakage in electromagnetic coil means such as a duty ratio controlled solenoid or at least one exciting coil portion between an end of a stator coil and a tap of a stepping motor, a checking circuitry is connected to a junction between the electromagnetic coil means and a driving transistor (switching element) to provide a checking pulse signal which provides a particular level only when an input duty ratio (pulsewidth modulated) signal is at a predetermined non-actuation (low) level and no breakage in the electromagnetic coil means occurs. In the embodiment, the checking pulse signal is sampled at a predetermined sampling period which is shorter than the period of the pulsewidth modulated signal. A historical memory in a sub CPU records (stores) a history of the sampled checking pulse signal. The diagnosis of whether the breakage of the electromagnetic coil means is present or absent is carried out on the basis of the presence or absence of the history of the particular level (predetermined high level) in the stored content, the sampled checking pulse signal during a predetermined diagnosis delay time duration.
    • 在用于诊断诸如占空比控制螺线管或定子线圈的端部和步进电机的抽头之间的至少一个励磁线圈部分的电磁线圈装置中存在(线)断裂的存在的装置和方法中, 检查电路连接到电磁线圈装置和驱动晶体管(开关元件)之间的连接处,以提供检查脉冲信号,该检测脉冲信号仅在输入占空比(脉宽调制)信号处于预定的不致动作时提供特定电平 低)电平,并且不会发生电磁线圈装置中的断裂。 在本实施例中,检测脉冲信号以比脉宽调制信号的周期短的预定采样周期被采样。 子CPU中的历史记忆记录(存储)采样检查脉冲信号的历史。 基于存储内容中的特定级别(预定高电平)的历史的存在或不存在,是否存在或不存在电磁线圈装置的断裂的诊断,在采样检查脉冲信号期间 预定诊断延迟时间。
    • 8. 发明授权
    • Exhaust gas recirculation control system for internal combustion engine
    • 内燃机排气再循环控制系统
    • US06227182B1
    • 2001-05-08
    • US09326704
    • 1999-06-07
    • Hirotada MurakiSadayuki Yonetamari
    • Hirotada MurakiSadayuki Yonetamari
    • F02M2507
    • F02D21/08F02D41/005F02D41/187F02D2041/0017F02M26/54Y02T10/47
    • An exhaust gas recirculation control system for an internal combustion engine comprises sensors detecting operating conditions of the engine, an air-flow meter detecting an actual intake-air flow rate, an exhaust-gas-recirculation passage connecting an exhaust manifold with an intake manifold, an exhaust-gas-recirculation control valve device disposed in the exhaust-gas-recirculation passage for regulating an EGR rate. An electronic control unit is electronically connected to the sensors and the exhaust-gas-recirculation control valve device. The control unit arithmetically calculates a basic EGR rate as a function of a first predetermined engine operating condition containing engine speed and load, and calculates a first correction factor as a function of a second predetermined engine operating condition, such as engine coolant temperature, and estimates an intake-air flow rate from the first predetermined engine operating condition, the basic EGR rate, and the first correction factor, and calculates a second correction factor from a ratio of the actual intake-air flow rate to the intake-air flow rate estimated for feedback-correction to the basic EGR rate. The control unit interrelatively makes a first EGR-rate correction based on the first correction factor and a second EGR-rate correction based on the second correction factor with respect to the basic EGR rate to produce the final desired EGR rate, and then executes EGR control on the basis of the final desired EGR rate.
    • 用于内燃机的废气再循环控制系统包括检测发动机的运行状况的传感器,检测实际进气流量的空气流量计,连接排气歧管与进气歧管的排气再循环通道, 排气再循环控制阀装置,设置在排气再循环通道中,用于调节EGR率。 电子控制单元电连接到传感器和排气再循环控制阀装置。 控制单元计算基本EGR率作为包含发动机转速和负载的第一预定发动机运转条件的函数,并且计算作为第二预定发动机运转状态(例如发动机冷却剂温度)的函数的第一校正系数,并且估计 从所述第一预定发动机运转状态,所述基本EGR率和所述第一校正系数的吸入空气流量,从所述实际吸气流量与所述吸入空气流量的比率,算出第二校正系数 用于对基本EGR率进行反馈校正。 控制单元基于第一校正因子进行第一EGR率校正,并且基于相对于基本EGR率的第二校正因子进行第二EGR率校正,以产生最终期望的EGR率,然后执行EGR控制 基于最终期望的EGR率。
    • 9. 发明授权
    • Fuel injection timing control system of fuel-injection pump for diesel
engines
    • 柴油机燃油喷射泵燃油喷射正时控制系统
    • US5996557A
    • 1999-12-07
    • US16339
    • 1998-01-30
    • Hirotada Muraki
    • Hirotada Muraki
    • F02D1/18F02D41/40F02M41/12F02M37/04
    • F02D41/401F02M41/126F02M41/128F02D2001/186F02D2041/2027F02D2200/063F02D41/408Y02T10/44
    • A fuel injection timing control system for a diesel fuel injection pump with a duty-cycle controlled electromagnetic solenoid valve associated with an injection-timing-control timer piston to change a timer-piston axial position or a set position of a pump plunger in response to a duty cycle of the electromagnetic solenoid valve, comprises a control unit for transiently permitting the entry of a duty cycle of the electromagnetic solenoid valve into a predetermined dead-zone for a predetermined period of time during a fuel injection timing closed-loop control in which an actual injection timing is feed-back controlled toward a target injection timing. In addition, the control unit limits the duty cycle of the electromagnetic solenoid valve to a predetermined limiting value as soon as the predetermined time period has been elapsed, during the fuel injection timing closed-loop control.
    • 一种用于柴油燃料喷射泵的燃料喷射正时控制系统,其具有与喷射正时控制定时器活塞相关联的占空比控制电磁电磁阀,以响应于以下操作改变定时器 - 活塞轴向位置或泵柱塞的设定位置 电磁电磁阀的占空比包括控制单元,用于在燃料喷射定时闭环控制期间瞬时允许电磁电磁阀的占空比进入预定的死区预定的时间段,其中 实际喷射定时被反馈控制朝向目标喷射定时。 此外,在燃料喷射正时闭环控制期间,一旦经过了预定时间段,控制单元将电磁电磁阀的占空比限制在预定的极限值。