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公开(公告)号：US11619196B2
公开(公告)日：2023-04-04
申请号：US17443934
申请日：2021-07-28
发明人： Aed Dudar
IPC分类号： F02M25/08
摘要： Methods and systems are provided for diagnosing degradation and/or alteration in an evaporative emission control system of a vehicle. In one example, a method for a vehicle may comprise, during a refueling event, detecting presence or absence of a fuel vapor canister coupled to a vent line of the evaporative emission control system of the vehicle based on a response of a hydrocarbon sensor coupled to the vent line. In this way, hydrocarbon emissions may be reduced by identifying vehicles with tampered or degraded evaporative emission control system.
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公开(公告)号：US11603805B1
公开(公告)日：2023-03-14
申请号：US17453549
申请日：2021-11-04
发明人： Aed Dudar , Finn Tseng
摘要： Methods and systems are provided for reducing a possibility of hydrocarbon (HC) release to atmosphere from an evaporative emissions control (EVAP) system. In one example, a method may include, isolating a fuel vapor canister of the EVAP system from atmosphere and an engine intake manifold upon conditions being met for a potential hydrocarbon (HC) breakthrough from the fuel vapor canister.
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公开(公告)号：US20230034896A1
公开(公告)日：2023-02-02
申请号：US17443934
申请日：2021-07-28
发明人： Aed Dudar
IPC分类号： F02M25/08
摘要： Methods and systems are provided for diagnosing degradation and/or alteration in an evaporative emission control system of a vehicle. In one example, a method for a vehicle may comprise, during a refueling event, detecting presence or absence of a fuel vapor canister coupled to a vent line of the evaporative emission control system of the vehicle based on a response of a hydrocarbon sensor coupled to the vent line. In this way, hydrocarbon emissions may be reduced by identifying vehicles with tampered or degraded evaporative emission control system.
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公开(公告)号：US20220412292A1
公开(公告)日：2022-12-29
申请号：US17304897
申请日：2021-06-28
发明人： Aed Dudar
摘要： Methods and systems for purging fuel vapors from an evaporative emissions system of a vehicle are described. The methods and systems may include opening one or more bypass valves of carbon filled canisters to supply air to a low pressure port of a venturi pump. The bypass valves may be opened when fuel vapors are being moved from a fuel tank to an engine while the engine operates.
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公开(公告)号：US11506150B2
公开(公告)日：2022-11-22
申请号：US17231901
申请日：2021-04-15
发明人： Aed Dudar
IPC分类号： F02M25/08 , B60K15/035 , B60K15/03
摘要： Methods and systems are provided for indication of a degradation in an EVAP and/or fuel system. In one example, a method for indication of a presence or absence of a degradation in a refueling system may include vacuum pull-down and pressure bleed-up tests being carried out based on a state of submersion of a spud valve in liquid fuel in a fuel tank.
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公开(公告)号：US11473533B1
公开(公告)日：2022-10-18
申请号：US17451271
申请日：2021-10-18
发明人： Aed Dudar
IPC分类号： F02M25/08
摘要： Methods and systems are provided for reducing a possibility of hydrocarbon (HC) breakthrough during a diagnostic routine of an evaporative emissions control (EVAP) system. In one example, a method may include, during the diagnostic routine, switching a direction of air-flow through a fuel vapor canister via adjustments to a three-way valve in response to a higher than threshold a change in temperature within the canister.
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公开(公告)号：US11441498B1
公开(公告)日：2022-09-13
申请号：US17305222
申请日：2021-07-01
发明人： Aed Dudar
摘要： Methods and systems are presented for controlling flow through a recirculation tube of an evaporative emissions system. The methods and systems may adjust flow through the recirculation tube by controlling an amount of time an evaporative emissions system valve is held open and held closed during refilling of a fuel tank.
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公开(公告)号：US20220243671A1
公开(公告)日：2022-08-04
申请号：US17651393
申请日：2022-02-16
发明人： Aed Dudar
摘要： Methods and systems are provided for engine braking in a vehicle. In one example, a method may include deactivating fueling to at least one cylinder of an engine, increasing an air mass provided to the engine via an electric boosting device, and adjusting an exhaust valve opening timing of the at least one cylinder in response to a request for engine braking. In this way, an amount of engine braking torque may be increased with reduced wear to engine system components.
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公开(公告)号：US11326560B1
公开(公告)日：2022-05-10
申请号：US17304080
申请日：2021-06-14
发明人： Aed Dudar
摘要： Methods and systems for performing diagnostics on an evaporative emission are described. The methods and systems may include evaluating pressure or vacuum development within an evaporative emissions system over time to determine the presence or absence of a breach in the evaporative emissions system. If a breach is identified, mitigating actions may be performed.
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公开(公告)号：US11319886B1
公开(公告)日：2022-05-03
申请号：US17075579
申请日：2020-10-20
发明人： Aed Dudar
摘要： Systems and methods for regenerating a canister purge valve filter that is included in an evaporative emissions system are disclosed. In one example, pressurized air is applied to a canister purge valve filter to dislodge contaminants from the filter. The contaminants may be discharged from the evaporative emissions system via a check valve that opens in response to the pressurized air.
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