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公开(公告)号：US10138847B2
公开(公告)日：2018-11-27
申请号：US15738898
申请日：2015-06-23
IPC分类号： F02M25/08 , B60K15/035 , B60K15/03
摘要： An evaporated fuel processing device includes: an evaporated fuel passage connecting a fuel tank and a canister; a purge passage connecting the canister and an intake passage of an internal combustion engine a first purge control valve arranged to open and close the purge passage; a tank open passage connecting a position on an upstream side of the first purge control valve in the purge passage, and the tank; and a second purge control valve arranged to open and close the tank open passage, when the fuel tank becomes a negative pressure, the second purge control valve being opened to introduce an atmospheric pressure through the canister.
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公开(公告)号：US10184430B2
公开(公告)日：2019-01-22
申请号：US15739020
申请日：2015-06-23
摘要： A diagnosis device for an evaporated fuel processing device includes: a pump arranged to pressurize or depressurize a system including the fuel tank and the canister; at least one pressure sensor arranged to sense a pressure within the system; and a fuel temperature sensor arranged to sense a temperature of a fuel within the fuel tank, the diagnosis device being configured to select a first leakage diagnosis using a positive pressure or a negative pressure existing within the fuel tank, or a second leakage diagnosis using a forcible pressurization or a forcible depressurization by the pump, based on a temperature difference between a fuel temperature at a start of driving, and a fuel temperature after an end of the driving, with respect to a request of a leakage diagnosis.
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公开(公告)号：US20180171939A1
公开(公告)日：2018-06-21
申请号：US15738898
申请日：2015-06-23
IPC分类号： F02M25/08 , B60K15/035
CPC分类号： F02M25/0836 , B60K15/035 , B60K15/03519 , B60K2015/03302 , F02M25/08 , F02M25/0818 , F02M25/0872 , F02M25/089 , F02M2025/0845
摘要： An evaporated fuel processing device includes: an evaporated fuel passage connecting a fuel tank and a canister; a purge passage connecting the canister and an intake passage of an internal combustion engine a first purge control valve arranged to open and close the purge passage; a tank open passage connecting a position on an upstream side of the first purge control valve in the purge passage, and the tank; and a second purge control valve arranged to open and close the tank open passage, when the fuel tank becomes a negative pressure, the second purge control valve being opened to introduce an atmospheric pressure through the canister.
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公开(公告)号：US20180171938A1
公开(公告)日：2018-06-21
申请号：US15739020
申请日：2015-06-23
CPC分类号： F02M25/0818 , F02D41/0037 , F02D2041/224 , F02D2041/225 , F02D2200/0414 , F02D2200/0602 , F02D2200/0606 , F02M25/0836 , F02M25/089 , F02M2025/0845
摘要： A diagnosis device for an evaporated fuel processing device includes: a pump arranged to pressurize or depressurize a system including the fuel tank and the canister; at least one pressure sensor arranged to sense a pressure within the system; and a fuel temperature sensor arranged to sense a temperature of a fuel within the fuel tank, the diagnosis device being configured to select a first leakage diagnosis using a positive pressure or a negative pressure existing within the fuel tank, or a second leakage diagnosis using a forcible pressurization or a forcible depressurization by the pump, based on a temperature difference between a fuel temperature at a start of driving, and a fuel temperature after an end of the driving, with respect to a request of a leakage diagnosis.
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