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    • 4. 发明授权
    • Abnormality diagnostic device of internal combustion engine with turbocharger
    • 具有涡轮增压器的内燃机异常诊断装置
    • US08413497B2
    • 2013-04-09
    • US13044021
    • 2011-03-09
    • Ryozo KayamaToshihiko TanakaMasahiro Kubo
    • Ryozo KayamaToshihiko TanakaMasahiro Kubo
    • G01M15/10
    • F02D41/22F02D41/0007F02D41/0085Y02T10/40
    • When a wastegate valve, which opens and closes an exhaust bypass passage bypassing an exhaust turbine, is open, exhaust gases of respective cylinders bypass the exhaust turbine and pass a sensing point of an air-fuel ratio sensor downstream of the exhaust turbine. Accordingly, the exhaust gases of the respective cylinders can be avoided from being mixed by the exhaust turbine, so an influence of an inter-cylinder variation in an air-fuel ratio due to an inter-cylinder imbalance abnormality becomes apt to appear in an output waveform of the air-fuel ratio sensor. Therefore, existence or nonexistence of the inter-cylinder imbalance abnormality is determined based on the output of the air-fuel ratio sensor when the wastegate valve is open. Eventually, the existence or nonexistence of the inter-cylinder imbalance abnormality can be determined accurately, thereby improving detection accuracy of the inter-cylinder imbalance abnormality.
    • 当打开和关闭旁路排气涡轮机的排气旁通通道的废气门打开时,各个气缸的废气旁路排气涡轮并将排气涡轮下游的空燃比传感器的感测点通过。 因此,可以避免各气缸的排气被排气涡轮混合,因此,由于气缸内不平衡异常引起的气缸内的变化对空燃比的影响容易出现在输出 空燃比传感器的波形。 因此,当排气门阀打开时,基于空燃比传感器的输出来确定气缸间不平衡异常的存在或不存在。 最终,可以精确地确定气缸内不平衡异常的存在或不存在,从而提高气缸间不平衡异常的检测精度。
    • 8. 发明申请
    • CONTROL APPARATUS AND CONTROL METHOD OF INTERNAL COMBUSTION ENGINE
    • 内燃机控制装置及控制方法
    • US20090292446A1
    • 2009-11-26
    • US12302178
    • 2007-10-04
    • Toshihiko Tanaka
    • Toshihiko Tanaka
    • F02D43/00F02D23/00
    • F02D41/0007F02B37/18F02D41/0255Y02T10/144Y02T10/26
    • A control apparatus of an internal combustion engine performs control to warm up a catalyst. More specifically, the control apparatus keeps a wastegate valve open when the temperature of the catalyst is less than a predetermined temperature and closes the wastegate valve when the temperature of the catalyst becomes equal to or greater than the predetermined temperature. The control apparatus executes control to increase and decrease the fuel injection quantity such that the internal combustion engine alternately switches between lean burn and rich burn when the wastegate valve is closed. Accordingly, rich gas and lean gas can be reliably mixed in the catalyst, and CO can be reliably combusted in the catalyst. Therefore, the catalyst can be promptly warmed up while CO, HC, and the like can be appropriately suppressed from flowing through the catalyst.
    • 内燃机的控制装置进行控制以预热催化剂。 更具体地,当催化剂的温度小于预定温度时,控制装置保持废气门阀打开,并且当催化剂的温度等于或大于预定温度时,关闭废气门阀。 控制装置执行控制以增加和减少燃料喷射量,使得内燃机在废气门关闭时在稀燃和富燃之间交替切换。 因此,在催化剂中可以可靠地混合富气和贫气,并且可以在催化剂中可靠地燃烧CO。 因此,可以适当地抑制CO,HC等流过催化剂而迅速升温催化剂。
    • 9. 发明授权
    • Improper fuel mixing determining apparatus for internal combustion engine
    • 用于内燃机的不正确的燃料混合确定装置
    • US07603981B2
    • 2009-10-20
    • US12166843
    • 2008-07-02
    • Toshihiko Tanaka
    • Toshihiko Tanaka
    • F02D41/22
    • F02D41/0025F02D19/0636F02D19/0649F02D35/027F02D2200/0612F02P5/1527Y02T10/36Y02T10/46
    • If improper fuel (light oil or kerosene) is mixed into fuel (gasoline) supplied to the engine, a knock limit of an ignition timing is retarded. Based on such a characteristic, every when knocking is detected based on a detection signal from a knock sensor, the ignition timing is stored as the knock occurring ignition timing and the ignition timing is retarded by a predetermined amount. After repeating the above processes, it is determined whether the knock occurring ignition timing is retarded more than a determination value (for example, a retarded limit value of the knock occurring ignition timing in a case that proper gasoline is served). When the knock occurring ignition timing is retarded more than the determination value, it is determined that the improper fuel is mixed in the fuel.
    • 如果不正确的燃料(轻油或煤油)混入供应给发动机的燃油(汽油)中,则点火正时的爆震极限将被延迟。 基于这样的特征,每当基于来自爆震传感器的检测信号检测到爆震时,点火正时被存储为爆震点火正时,并且点火正时被延迟预定量。 在重复上述过程之后,确定爆震发生的点火正时是否比确定值延迟(例如,在服用适当的汽油的情况下,发生点火正时的延迟极限值)。 当爆震发生的点火正时被延迟超过确定值时,确定不合适的燃料混合在燃料中。