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    • 93. 发明授权
    • Apparatus for detecting malfunction in evaporated fuel purge system used
in internal combustion engine
    • 用于检测内燃机中使用的蒸发燃料净化系统故障的装置
    • US5295472A
    • 1994-03-22
    • US998191
    • 1992-12-29
    • Takayuki OtsukaKouichi OsawaTatsumasa SugiyamaKatsuhiko TeraokaNobuyuki KobayashiKoji Okawa
    • Takayuki OtsukaKouichi OsawaTatsumasa SugiyamaKatsuhiko TeraokaNobuyuki KobayashiKoji Okawa
    • F02D41/00F02M25/08F02M33/02
    • F02M25/0809
    • A malfunction detecting apparatus for an evaporated fuel purge system includes a first control valve for controlling a flow of fuel vapor in a purge passage between a canister and an intake passage, a second control valve for controlling a flow of air from the atmosphere to the canister via an air inlet opening of the canister, a first control part for turning OFF the second control valve and for turning ON the first control valve during a first time period, so as to subject the purge passage, the canister, and a vapor passage to a negative pressure of the intake passage during the first time period, and a first discriminator for detecting whether or not a malfunction has occurred in the system, in accordance with a pressure change rate derived from pressures of the system sensed at a start of the first time period and at an end thereof. The apparatus further includes a second control part for detecting whether or not a pressure of the system reaches a prescribed negative pressure after it is detected that no malfunction has occurred in the system, and for turning OFF the first and second control valves during a second time period after the prescribed negative pressure is reached, and a second discriminator for detecting whether or not a malfunction has occurred in the system, in accordance with a pressure change rate derived from pressures of the system sensed at a start of the second time period and at an end thereof.
    • 用于蒸发燃料净化系统的故障检测装置包括:第一控制阀,用于控制罐和进气通道之间的净化通道中的燃料蒸汽的流动;第二控制阀,用于控制从大气到罐的空气流 通过所述罐的进气口,具有用于关闭所述第二控制阀并在第一时间段内接通所述第一控制阀的第一控制部件,以使所述清洗通道,所述罐和蒸汽通道经受 在第一时间段期间进气通道的负压,以及用于检测系统中是否发生故障的第一鉴别器,根据从第一时间段开始时感测到的系统的压力导出的压力变化率 时间段和结尾。 该装置还包括第二控制部件,用于在检测到系统中没有发生故障之后检测系统的压力是否达到规定的负压,并且在第二时间内关闭第一和第二控制阀 达到规定负压后的时间段,以及第二鉴别器,用于根据从第二时间段开始时感测到的系统的压力导出的压力变化率,以及在第二时间段开始时感测到的压力变化率来检测系统中是否发生故障 结束了。
    • 95. 发明授权
    • Device for detecting occurrence of misfiring in multicylinder engine
    • 用于检测多功能发动机中发生故障的装置
    • US5245866A
    • 1993-09-21
    • US934829
    • 1992-08-24
    • Yukihide HashiguchiNobuyuki Kobayashi
    • Yukihide HashiguchiNobuyuki Kobayashi
    • F02D45/00F02P17/12G01M15/04G01M15/11
    • G01M15/11
    • A device for detecting an occurrence of misfiring comprising a crankshaft sensor, which crankshaft sensor is used to detect the elapsed time required for the crankshaft to turn by a predetermined crankshaft angle during combustion in the cylinders. The difference in the elapsed time between cylinders where every other power stroke is performed is found and a determination is made as to at which cylinder the misfiring occurred when the difference exceeds a set value. The difference in elapsed times between cylinders with power strokes of crank angles 360.degree. apart is found and an estimated value of the difference changing due to acceleration or deceleration is found from that difference. This estimated value is used to correct the set value.
    • 一种用于检测发动不良的装置,包括曲轴传感器,该曲轴传感器用于检测在气缸中燃烧期间曲轴转动预定曲轴角所需的经过时间。 找到执行了其他动力冲程的气缸之间的经过时间的差异,并且确定当该差异超过设定值时发生了失火的气缸。 发现曲柄角度为360°的功率行程的气缸之间的经过时间的差异,并且从该差异中发现由于加速或减速而导致的差异变化的估计值。 该估计值用于校正设定值。