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公开(公告)号：US06532808B1
公开(公告)日：2003-03-18
申请号：US09570540
申请日：2000-05-12
IPC分类号： G01M1500
CPC分类号： F02D41/222 , F01P11/16 , F01P2023/00 , F01P2031/20 , F01P2031/32 , F02D41/187 , F02D2200/0414 , Y02T10/40
摘要： In a thermostat failure diagnosis apparatus for an internal combustion engine in which a failure diagnosis of a thermostat can be effectively made, in the case where, after starting of the engine, an intake air quantity of the engine or a parameter related to the intake air quantity is equal to or higher than a predetermined value, and a cooling water temperature is equal to or higher than an intake air temperature (outside air temperature), on the basis of a time in which a rising quantity in the cooling water temperature at an upstream side of the thermostat reaches a predetermined value, or a time in which the cooling water temperature rises to a predetermined temperature, the failure of the thermostat is judged. By this, the failure diagnosis is not made in the state where an engine generating heat quantity is small so that there is a fear that an erroneous diagnosis occurs, and the failure diagnosis of the thermostat can be rationally made only in the state where the engine generating heat quantity is large to some degree so that there is no fear of erroneous diagnosis.
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公开(公告)号：US06397824B1
公开(公告)日：2002-06-04
申请号：US09633345
申请日：2000-08-04
申请人： Takashi Takatsuka , Hidetsugu Kanao , Tomonobu Sakagami , Kenji Saito , Tateo Kume , Haruki Fukuda
发明人： Takashi Takatsuka , Hidetsugu Kanao , Tomonobu Sakagami , Kenji Saito , Tateo Kume , Haruki Fukuda
IPC分类号： F02M3302
CPC分类号： F02D41/22 , F02M25/0809
摘要： A fault diagnosing apparatus for evapopurge systems, including a device adapted to detect a pressure in the interior of an evapopassage including a fuel tank, a depressurization device adapted to close a first valve provided in an atmosphere-opened port of a canister and depressurize the interior of the evapopassage by a negative pressure occurring in a suction passage of an internal combustion engine, a repressurization device adapted to close a second valve after the operation of the depressurization device finishes, to repressurize the interior of the evapopassage, and a fault judgement device adapted to allow a judgement, which is based on an output from the pressure detecting device, that an evapopurge system is abnormal to be given on condition that the depressurization and repressurization devices are operated plural times.
摘要翻译： 一种用于蒸发系统的故障诊断装置，包括适于检测包括燃料箱的蒸发器内部的压力的装置，适于关闭设置在罐的大气开放端口中的第一阀的减压装置，并且使内部 通过在内燃机的吸入通道中产生的负压引起的蒸发作用，在减压装置的运转结束后适合关闭第二阀的再加压装置，对蒸发器的内部进行再加压，以及适应的故障判断装置 为了允许基于来自压力检测装置的输出的判断，在减压和再加压装置多次操作的条件下，蒸发系统异常。
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公开(公告)号：US06752011B2
公开(公告)日：2004-06-22
申请号：US10350106
申请日：2003-01-24
IPC分类号： G01M1500
CPC分类号： F02D41/222 , F01P11/16 , F01P2023/00 , F01P2031/20 , F01P2031/32 , F02D41/187 , F02D2200/0414 , Y02T10/40
摘要： In a thermostat failure diagnosis apparatus for an internal combustion engine in which a failure diagnosis of a thermostat can be effectively made, in the case where, after starting of the engine, an intake air quantity of the engine or a parameter related to the intake air quantity is equal to or higher than a predetermined value, and a cooling water temperature is equal to or higher than an intake air temperature (outside air temperature), on the basis of a time in which a rising quantity in the cooling water temperature at an upstream side of the thermostat reaches a predetermined value, or a time in which the cooling water temperature rises to a predetermined temperature, the failure of the thermostat is judged. By this, the failure diagnosis of the thermostat can be rationally made only when the engine generating heat quantity is large to some degree to prevent erroneous diagnosis.
摘要翻译： 在用于内燃机的恒温器故障诊断装置中，其中可以有效地进行恒温器的故障诊断，在发动机起动之后，发动机的进气量或与进气有关的参数的情况下 数量等于或高于预定值，并且冷却水温度等于或高于进气温度（室外空气温度），其基于冷却水温度的上升量 恒温器的上游侧达到预定值，或者冷却水温度上升到预定温度的时间，判断恒温器的故障。 由此，只有在发动机发热量大到一定程度时才能合理地进行恒温器的故障诊断，以防止误诊。
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