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    • 1. 发明授权
    • Exhaust gas purification device
    • 废气净化装置
    • US5987884A
    • 1999-11-23
    • US95763
    • 1998-06-11
    • Kazuya KibeMasato GotohTatsuji MizunoKouichi Akita
    • Kazuya KibeMasato GotohTatsuji MizunoKouichi Akita
    • B01D53/94F01N3/20F01N9/00F02B37/00F02M25/07F01N3/00
    • F02D41/0275B01D53/9495F02B37/00F02B37/025F02D41/0065F02D41/008F02D41/405F01N13/107F01N2430/06F01N2610/03F02M26/15Y02T10/144Y02T10/44Y02T10/47
    • According to the invention, there is provided an exhaust gas purification device for purifying an exhaust gas discharged from an engine having cylinders including first and second cylinders. An exhaust stroke in the first cylinder is carried out next to an exhaust stroke in the second cylinder. The exhaust gas purification device comprises exhaust branch passages which are connected to the cylinders, respectively. The exhaust branch passages include first and second exhaust branch passages which are connected to the first and second cylinders, respectively. The exhaust gas purification device comprises a common exhaust passage connected to the exhaust branch passages, a catalyst positioned in the common exhaust passage for purifying an exhaust gas, and an exhaust gas recirculation passage connected to the first exhaust branch passage. The exhaust gas recirculation passage introduces the exhaust gas from the first exhaust branch passage into an intake passage which is connected to the cylinders. According to the invention, a reducing agent is fed to only the second cylinder during the power or the exhaust stroke in the second cylinder to promote the purifying operation of the catalyst when the exhaust gas is introduced into the intake passage via the exhaust gas recirculation passage.
    • 根据本发明,提供了一种用于净化从具有包括第一和第二气缸的气缸的发动机排出的废气的排气净化装置。 在第二气缸中的排气冲程旁边执行第一气缸中的排气冲程。 废气净化装置包括分别连接到气缸的排气分支通道。 排气分支通道包括分别连接到第一和第二气缸的第一和第二排气分支通道。 废气净化装置包括连接到排气支路的公共排气通道,位于公共排气通道中用于净化废气的催化剂和连接到第一排气分支通道的废气再循环通道。 排气再循环通道将排气从第一排气分支通道引入连接到气缸的进气通道。 根据本发明,在第二气缸的动力或排气冲程期间,还原剂仅供给到第二气缸,以在排气通过排气再循环通道引入进气通道时促进催化剂的净化操作 。
    • 3. 发明授权
    • Fuel injection control system for a diesel engine
    • 柴油机燃油喷射控制系统
    • US6016788A
    • 2000-01-25
    • US109417
    • 1998-07-02
    • Kazuya KibeMasato GotohTatsuji Mizuno
    • Kazuya KibeMasato GotohTatsuji Mizuno
    • F02M25/07F02B3/06F02D21/08F02D41/00F02D41/02F02D41/04F02D41/14F02D41/38F02D43/00
    • F02D41/0052F02D41/38F02B3/06F02D2041/0017F02D2041/0022F02D2250/38F02D41/18Y02T10/42Y02T10/47
    • In a fuel injection control system, a throttle valve is provided on the intake air passage of a diesel engine and an EGR control valve is provided for recycling a part of the engine exhaust gas to the intake air system of the engine. An engine control unit (ECU) controls the intake air amount of the engine to a value corresponding to the engine operating condition by adjusting the throttle valve and the EGR control valve. Further, the ECU detects the actual intake air amount by an airflow meter disposed at the inlet of the intake air passage and determines the maximum fuel injection amount based on the engine speed and the actual intake air amount. The maximum fuel injection amount is the maximum amount of the fuel which does not generate the exhaust smoke. By restricting the actual fuel injection amount so that the actual fuel injection amount does not exceed the maximum fuel injection amount, the generation of the exhaust smoke is prevented in transient operating conditions of the engine regardless of a delay in the response of the EGR control valve.
    • 在燃料喷射控制系统中,在柴油发动机的进气通道上设置有节流阀,并且设置有用于将发动机排气的一部分再循环到发动机的进气系统的EGR控制阀。 发动机控制单元(ECU)通过调节节流阀和EGR控制阀将发动机的进气量控制在与发动机运转状态对应的值。 此外,ECU通过设置在进气通道的入口处的气流计检测实际进气量,并且基于发动机速度和实际进气量来确定最大燃料喷射量。 最大燃料喷射量是不产生排气烟的燃料的最大量。 通过限制实际燃料喷射量使得实际燃料喷射量不超过最大燃料喷射量,在发动机的瞬态操作条件下防止排气烟的产生,而与EGR控制阀的响应延迟无关 。
    • 6. 发明授权
    • Exhaust gas purifying device for engine
    • 发动机废气净化装置
    • US5884476A
    • 1999-03-23
    • US925025
    • 1997-09-08
    • Shinya HirotaTatsuji MizunoKazuya Kibe
    • Shinya HirotaTatsuji MizunoKazuya Kibe
    • F02M25/07B01D53/94F01N3/08F01N3/20F01N3/24F01N3/36F02D21/08F02D35/00F02D43/00
    • F01N3/2066B01D53/9431B01D53/9495F02D21/08F02D35/0092F02D41/0052B01D2251/208B01D53/9418F01N2610/03F02D2200/0802F02D41/0055F02D41/0275Y02T10/24Y02T10/42Y02T10/47
    • An exhaust gas purifying device, for an engine performing a lean operation and having an EGR system capable of controlling an EGR ratio, comprises a NO.sub.X catalyst arranged in the exhaust passage capable of selectively reducing NO.sub.X in the inflowing exhaust gas, in the oxidizing atmosphere including a reducing agent, and a reducing agent injector arranged in the exhaust passage of the engine for secondarily supplying a reducing agent to the exhaust passage upstream of the NO.sub.X catalyst. The EGR system has an EGR passage connecting the exhaust passage and the intake passage of the engine, an EGR control valve arranged in the EGR passage, and an intake air control valve arranged in the intake passage upstream of an inlet of the EGR passage. The openings of the EGR control valve and the intake air control valve are controlled to control the temperature of the exhaust gas to make the temperature of the NO.sub.X catalyst within the optimum temperature range or equal to the optimum temperature. The amount of the reducing agent injected by the reducing agent injector is made smaller as the EGR ratio becomes higher.
    • 一种排气净化装置,用于执行稀薄运转并具有能够控制EGR率的EGR系统的发动机,包括排气通道中的NOX催化剂,其能够选择性地还原流入废气中的NO x,其包括在氧化气氛中,包括 还原剂和还原剂喷射器,其布置在发动机的排气通道中,用于二次向NOX催化剂上游的排气通道供应还原剂。 EGR系统具有连接发动机的排气通路和进气通路的EGR通路,配置在EGR通路中的EGR控制阀以及配置在EGR通路的入口上游的进气通路内的进气控制阀。 控制EGR控制阀和进气控制阀的开口以控制排气的温度,使NOX催化剂的温度在最佳温度范围内或等于最佳温度。 随着EGR率变高,由还原剂喷射器喷射的还原剂的量变小。