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公开(公告)号：US5732687A
公开(公告)日：1998-03-31
申请号：US742902
申请日：1996-11-01
CPC分类号： F02M25/0809 , F02M25/08
摘要： An evaporative fuel-processing system for an internal combustion engine includes a canister for adsorbing evaporative fuel generated in the fuel tank, a charging passage connecting between the canister and the fuel tank, a purging passage connecting between the canister and the intake system of the engine, an open-to-atmosphere passage for communicating the canister with atmosphere, a charge control valve for selectively opening and closing the charging passage, a purge control valve for selectively opening and closing the purging passage, and a vent shut valve for selectively opening and closing the open-to-atmosphere valve, and a pressure sensor inserted in the charging passage at a location on one side of the charge control valve closer to the fuel tank, for detecting internal pressure within the charging passage. When predetermined conditions are satisfied, the purge control valve is closed and the charge control valve and the vent shut valve are opened. It is determined that the vent shut valve is abnormal when the internal pressure detected by the pressure sensor is below a predetermined negative pressure value while the purge control valve, the charge control valve, and the vent shut valve are in the above respective states.
摘要翻译： 用于内燃机的蒸发燃料处理系统包括用于吸附在燃料箱中产生的蒸发燃料的罐，连接在罐和燃料箱之间的充电通道，连接在发动机的罐和进气系统之间的净化通道 ，用于使气罐与大气连通的开放通气通道，用于选择性地打开和关闭充气通道的充气控制阀，用于选择性地打开和关闭吹扫通道的吹扫控制阀，以及用于选择性地打开和关闭吹扫通道的排气关闭阀， 关闭大气开放阀，以及压力传感器，该压力传感器插入到充电控制阀的靠近燃料箱的一侧的位置处的充电通道中，用于检测充电通道内的内部压力。 当满足预定条件时，清除控制阀关闭，并且打开充气控制阀和排气关闭阀。 当清洗控制阀，充气控制阀和排气关闭阀处于上述各自状态时，当由压力传感器检测到的内部压力低于预定负压值时，确定排气关闭阀异常。
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公开(公告)号：US5676119A
公开(公告)日：1997-10-14
申请号：US719565
申请日：1996-09-25
CPC分类号： F02D41/1495 , F02D41/123
摘要： An air-fuel ratio control system for an internal combustion engine has an exhaust gas component concentration sensor having a sensor element and arranged in the exhaust system of the engine, for detecting concentration of a predetermined component present in exhaust gases emitted from the engine. An ECU controls the air-fuel ratio of an air-fuel mixture supplied to the engine, based on results of comparison between an output value from the sensor and a predetermined reference value, and detects deterioration of the exhaust gas component concentration sensor, based on the output value from the sensor. Engine operating condition sensors detect operating conditions of the engine. It is determined whether or not the engine is in a predetermined engine operating condition in which the sensor element temperature of the exhaust gas component concentration sensor lowers, based on outputs from the engine operating condition sensors. Detection of deterioration of the sensor is inhibited over a predetermined time period after the engine leaves the predetermined operating condition.
摘要翻译： 用于内燃机的空燃比控制系统具有排气组分浓度传感器，该排气组分浓度传感器具有传感器元件并且布置在发动机的排气系统中，用于检测从发动机排出的废气中存在的预定组分的浓度。 ECU根据来自传感器的输出值与规定的基准值的比较结果，控制供给到发动机的空气燃料混合物的空燃比，并基于以下方式检测废气成分浓度传感器的劣化 传感器的输出值。 发动机工况条件传感器检测发动机的运行状况。 基于来自发动机工况条件传感器的输出，确定发动机是否处于排气组分浓度传感器的传感器元件温度降低的预定发动机工作状态。 在发动机离开预定操作状态之后的预定时间段内，抑制传感器劣化的检测。
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公开(公告)号：US5850820A
公开(公告)日：1998-12-22
申请号：US771255
申请日：1996-12-20
CPC分类号： F02M25/0809 , F02D41/0032 , F02M25/08
摘要： An evaporative fuel control system for an internal combustion engine having a throttle valve arranged in the intake system. A canister adsorbs evaporative fuel generated in the fuel tank. A purging passage extends between the canister and the intake system, for purging evaporative fuel into the intake system at a location downstream of the throttle valve, and a purge control valve is arranged across the purging passage, for controlling the flow rate of evaporative fuel supplied to the intake system through the purging passage. When the engine is in a predetermined operating condition, the flow rate of evaporative fuel supplied to the engine is changed by controlling the purge control valve, then the degree of influence of the evaporative fuel on an air-fuel ratio of a mixture supplied to the engine is detected before and after the changing of the flow rate of the evaporative fuel, and an operating error of the purge control valve is determined based on the detected degree of influence.
摘要翻译： 一种用于内燃机的蒸发燃料控制系统，其具有布置在进气系统中的节流阀。 一个罐吸附燃料箱中产生的蒸发燃料。 清洗通道在罐和进气系统之间延伸，用于在节流阀下游的位置处将蒸发燃料吹扫到进气系统中，并且净化控制阀布置在净化通道两侧，用于控制供应的蒸发燃料的流量 通过清洗通道进入进气系统。 当发动机处于预定操作状态时，通过控制排气控制阀来改变供给发动机的蒸发燃料的流量，然后蒸发燃料对供给到发动机的混合物的空燃比的影响程度 在改变蒸发燃料的流量之前和之后检测发动机，并且基于检测到的影响程度来确定清洗控制阀的操作误差。
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公开(公告)号：US5119782A
公开(公告)日：1992-06-09
申请号：US738026
申请日：1991-07-30
CPC分类号： F02P5/1523 , F02P5/1504 , F02P5/1521 , Y02T10/46
摘要： An ignition timing control system for vehicle internal combustion engines which retards the ignition timing during acceleration so as to reduce power shock caused by drive shaft vibration generated when the body of a vehicle with a high-powered engine is not able to keep up with the sudden change in engine output torque and so as to avoid the combustion knock that is apt occur during acceleration. In order to compensate for the monifold pressure lag when an acceleration state is detected, the engine load is monitored as to whether it reaches a reference level within prescribed a period, and only after it is confirmed that the engine output torque has actually begun to increase within the prescribed period, the ignition timing retard is commenced. The retarded ignition timing is maintained for another period when the engine load is above a second reference level and then returned in the advance direction at a first slow rate. On the other hand, if the engine load is below the second reference level, the retarded ignition timing is immediately advanced at a second rate which is greater than the first rate.
摘要翻译： 一种用于车辆内燃机的点火正时控制系统，其在加速期间延迟点火正时，以便减少当具有高功率发动机的车辆的车身不能与突然的紧跟时产生的驱动轴振动引起的动力冲击 改变发动机输出扭矩，以避免在加速过程中发生的燃烧爆震。 为了补偿检测到加速状态时的单压力滞后，在规定的期间内监视发动机负载是否达到基准水平，并且仅在确认发动机输出转矩实际开始增加之后 在规定的时间内开始点火正时延迟。 当发动机负载高于第二参考水平然后以第一慢速度在前进方向返回时，延迟点火正时保持另一时段。 另一方面，如果发动机负载低于第二基准水平，则延迟点火正时立即以大于第一速率的第二速率升高。
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公开(公告)号：US5906184A
公开(公告)日：1999-05-25
申请号：US943619
申请日：1997-10-03
CPC分类号： F02D41/22 , F02D2250/16 , Y02T10/40
摘要： When fully closed throttle opening learning device M1 learns a fully closed throttle opening value THMIN on the basis of an actual throttle opening value TH at an idle running time, comparison device M2 compares the sum of the fully closed throttle opening value THMIN and a predetermined value a with the actual throttle opening value TH to decide the possibility of the occurrence of a fault, and fault decision acceptance device M3 decides the acceptance/rejection of execution of the fault decision of an idle revolution controlling unit IC on the basis of the comparison result of the comparison device M2. As a result, even with a degradation in the output characteristics of a throttle opening sensor, an erroneous decision can be avoided by rejecting the execution of the fault decision when there is a possibility of an erroneous decision.
摘要翻译： 当全闭合节气门开度学习装置M1基于怠速行驶时的实际节气门开度值TH学习完全关闭的节气门开度值THMIN时，比较装置M2将完全关闭的节气门开度值THMIN和预定值 a，以确定发生故障的可能性的实际节气门开度值TH，故障判定接收装置M3根据比较结果决定空转革命控制单元IC的故障判定的执行的接受/拒绝 的比较装置。 结果，即使在节气门开度传感器的输出特性的劣化的情况下，当存在错误判定的可能性时，也可以通过拒绝执行故障判定来避免错误的判定。
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6.发明授权Air-fuel ratio sensor deterioration-detecting system for internal combustion engines 失效用于内燃机的空燃比传感器劣化检测系统
公开(公告)号：US5692486A
公开(公告)日：1997-12-02
申请号：US726169
申请日：1996-10-04
申请人： Kojiro Tsutsumi , Yuji Fujiki , Toshitaka Hachiro , Shigeto Kashiwabara , Fumio Hara , Sachito Fujimoto
发明人： Kojiro Tsutsumi , Yuji Fujiki , Toshitaka Hachiro , Shigeto Kashiwabara , Fumio Hara , Sachito Fujimoto
CPC分类号： F02D41/1441 , F02D41/1495
摘要： An air-fuel ratio sensor deterioration-detecting system is provided for an internal combustion engine having first and second air-fuel ratio sensors arranged in the exhaust system upstream and downstream of a catalytic converter therein. An ECU calculates a control parameter, based on an output from the second air-fuel ratio sensor, calculates an air-fuel ratio correction amount, based on an output from the first air-fuel ratio sensor and the calculated control parameter, and executes air-fuel ratio feedback control, based on the calculated air-fuel ratio correction amount. The ECU also determines deterioration of the second air-fuel ratio sensor, based on the output from the same in such a manner that the air-fuel ratio correction amount is increased or decreased by a predetermined amount, based on the output from the second air-fuel ratio when a variation in the second air-fuel ratio sensor output falls within a predetermined small variation range during execution of the air-fuel ratio feedback control, and the second air-fuel ratio sensor is determined to be deteriorated when the output variation falls within the predetermined small variation range even after the increase or decrease of the air-fuel ratio correction amount.
摘要翻译： 本发明提供了一种用于内燃机的空燃比传感器劣化检测系统，该内燃机具有布置在排气系统中的催化转化器的上游和下游的第一和第二空燃比传感器。 ECU根据来自第二空燃比传感器的输出，根据第一空燃比传感器的输出和计算出的控制参数，计算出空燃比校正量的控制参数，并执行空气 - 燃料比反馈控制，基于所计算的空燃比校正量。 ECU还根据第二空燃比传感器的输出，根据第二空气燃料比传感器的输出，以空燃比校正量增加或减少预定量的方式，确定第二空燃比传感器的劣化 当在空燃比反馈控制执行期间第二空燃比传感器输出的变化落在预定的小变化范围内时，确定第二空燃比传感器的输出变化量 即使在空燃比校正量的增加或减少之后，也落在预定的小变化范围内。
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7.发明授权
公开(公告)号：US5113835A
公开(公告)日：1992-05-19
申请号：US737306
申请日：1991-07-29
CPC分类号： F02D41/0077 , F02M26/49 , F02M26/57 , Y02T10/47
摘要： A method of controlling exhaust gas recirculation for an internal combustion engine having an exhaust gas recirculation control system comprises the step of determining that there is failure in the exhaust gas recirculation control system when a difference between an actual value of valve opening of an exhaust gas recirculation valve of the system arranged in an exhaust gas recirculation passage for controlling an amount of exhaust gases returned from an exhaust passage to an intake passage of the engine and a desired value of the valve opening of the exhaust gas recirculation valve is equal to or larger than a predetermined value which is dependent on operating conditions of the engine.
摘要翻译： 一种控制具有排气再循环控制系统的内燃机的废气再循环的方法包括以下步骤：当废气再循环的阀门的开度的实际值之间的差值确定废气再循环控制系统中存在故障时， 设置在废气再循环通道中的系统的阀门，用于控制从排气通道返回到发动机的进气通道的排气量，并且排气再循环阀的阀门开度的期望值等于或大于 取决于发动机的操作条件的预定值。
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