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    • 4. 发明专利
    • Fuel injection control device for diesel engine
    • 柴油发动机燃油喷射控制装置
    • JP2008309086A
    • 2008-12-25
    • JP2007158790
    • 2007-06-15
    • Denso CorpToyota Motor Corpトヨタ自動車株式会社株式会社デンソー
    • ISOJIMA KOICHIROTARUSAWA YUKIOISHI MORIKAZU
    • F02D41/12F02D41/40F02D45/00
    • F02D41/401F02D35/023F02D41/0025F02D41/1498F02D2200/0602F02D2200/1015F02D2200/602Y02T10/44
    • PROBLEM TO BE SOLVED: To provide a fuel injection control device for a diesel engine capable of controlling fuel injection timing in accordance with used fuel without adding sensors to measure fuel properties of the used fuel.
      SOLUTION: During deceleration operation of the diesel engine 2 in which fuel injection amount becomes zero, normal fuel misfire limit timing is set to be fuel injection timing a1 on the maximum timing delay side, and while fuel injection timing is changed sequentially from the fuel injection timing a1 to a timing advance side by predetermined amount ΔX, fixed amount of fuel is injected from an injector of a specific cylinder. Generation torque generated in the diesel engine 2 by the fuel injection is estimated by revolution fluctuation of the diesel engine 2. Fuel injection timing when the estimated torque reaches a torque determination value first is specified as misfire limit timing corresponding to used fuel, and based on the deviation amount between the misfire limit timing and the normal fuel misfire limit timing, a map for injection timing calculation is corrected. As a result, without using a cylinder pressure sensor or the like, fuel injection timing can be optimally controlled.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种能够根据使用的燃料控制燃料喷射正时的柴油发动机的燃料喷射控制装置,而不添加传感器来测量废燃料的燃料性质。 解决方案:在燃料喷射量为零的柴油发动机2的减速操作期间,将正常燃料失火限制定时设定为最大定时延迟侧的燃料喷射正时a1,同时燃料喷射正时从 燃料喷射正时a1到定时提前侧预定量ΔX,从特定气缸的喷射器喷射固定量的燃料。 通过柴油发动机2的转速估计柴油发动机2产生的通过燃料喷射产生的转矩。首先将估计转矩达到转矩确定值的燃料喷射正时指定为对应于使用燃料的失火极限时刻,并且基于 错误限制定时与正常燃料失火限制定时之间的偏差量,校正喷射正时计算的映射。 结果,在不使用气缸压力传感器等的情况下,可以最佳地控制燃料喷射正时。 版权所有(C)2009,JPO&INPIT
    • 8. 发明专利
    • Fuel injection control device
    • 燃油喷射控制装置
    • JP2011089449A
    • 2011-05-06
    • JP2009242558
    • 2009-10-21
    • Denso Corp株式会社デンソー
    • TAKIGAWA NOBUHIROTARUSAWA YUKI
    • F02D41/22F02D41/08F02D45/00F02M55/02F02M59/36F02M63/00
    • F02D41/08F02D41/123F02D41/222F02D41/3836F02D2041/2055F02D2041/223F02D2200/0602F02D2200/0604
    • PROBLEM TO BE SOLVED: To provide a fuel injection control device highly accurately controlling a fuel injection system based on common rail pressure, even in case of a pressure sensor failure. SOLUTION: When an engine operational status is non-injection deceleration state (S400:Yes), the fuel injection control device instructs a fuel injection valve to perform a single injection for minute injection amount learning (S402), calculates engine torque from a fluctuation amount (Δω) of an engine speed, and calculates an actual injection amount of the fuel injection valve from the engine torque (S404). The fuel injection control device specifies the common rail pressure from injection characteristics map indicating correlation between a pulse width of an injection instruction signal and an injection amount, and acquires the common rail pressure as estimated pressure (S406). When absolute values of difference between the estimated pressure of the common rail and detection pressure of the common rail by the pressure sensor exceed a predetermined value for the n-th time in a row (S410:Yes, S414:Yes), the fuel injection control device diagnoses that the pressure sensor is in failure. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:即使在压力传感器故障的情况下,也可以提供一种基于共轨压力高精度地控制燃料喷射系统的燃料喷射控制装置。 解决方案:当发动机运转状态为非喷射减速状态(S400:是)时,燃料喷射控制装置指示燃料喷射阀进行单次喷射量的微量喷射量学习(S402),计算发动机转矩从 发动机转速的变动量(Δω),根据发动机转矩计算燃料喷射阀的实际喷射量(S404)。 燃料喷射控制装置从指示喷射指示信号的脉冲宽度与喷射量之间的相关性的喷射特性图中指定共轨压力,并获取作为估计压力的共轨压力(S406)。 当压力传感器的共轨的估计压力和共轨的检测压力之间的差的绝对值超过连续第n次的预定值时(S410:是,S414:是),燃料喷射 控制装置诊断压力传感器故障。 版权所有(C)2011,JPO&INPIT
    • 9. 发明专利
    • Nox aftertreatment device of engine including ozone generation means
    • 发动机NOX后处理装置,包括臭氧发生装置
    • JP2014047669A
    • 2014-03-17
    • JP2012190021
    • 2012-08-30
    • Denso Corp株式会社デンソー
    • KINUGAWA MASUMIYABANETA SHIGETOTARUSAWA YUKINODA KEIJI
    • F01N3/08F01N3/22
    • B01D53/922B01D2251/104B01D2257/404B01D2258/012F01N3/0842F01N9/00F01N2240/18F01N2240/38F01N2250/14F01N2570/14Y02A50/2344Y02T10/47
    • PROBLEM TO BE SOLVED: To provide a NOx aftertreatment device of an engine which can purify NOx immediately after start-up and speedily realizes a necessary and sufficient ozone supply flow rate in accordance with a change in a NOx flow rate without requiring a large-scale device.SOLUTION: A NOx aftertreatment device 3 removes NOx from exhaust in a manner that connects an exhaust pipe 2a of an engine 1 having a turbocharger 15 to an ozone supply passage 31 supplying ozone generated by ozone generation means 6 and converts the NOx in the exhaust into nitric acid or precursor thereof with the ozone. The ozone generation means 6: takes in a portion of incoming air supercharged from an air inflow passage 32 connected to an intake pipe 18 of the engine 1; and produces the ozone by generating discharge plasma in a discharge space section 63. Also, a controller 4 controls an ozone generation flow rate in accordance with an operation state of the engine 1.
    • 要解决的问题:提供一种发动机的NOx后处理装置,其可以在启动后立即净化NOx,并且根据NOx流量的变化快速实现必要且充足的臭氧供给流量,而不需要大规模 装置。解决方案:NOx后处理装置3以将具有涡轮增压器15的发动机1的排气管2a连接到供给由臭氧发生装置6产生的臭氧的臭氧供给通道31的方式从排气中除去NOx,并将NOx 用臭氧排入硝酸或其前体。 臭氧产生装置6:从连接到发动机1的进气管18的空气流入通道32吸入进气的一部分; 并且通过在放电空间部63中产生放电等离子体而产生臭氧。另外,控制器4根据发动机1的运转状态来控制臭氧发生流量。