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公开(公告)号：US20220025800A1
公开(公告)日：2022-01-27
申请号：US17002515
申请日：2020-08-25
申请人： PACCAR Inc
摘要： The present disclosure describes methods for evaluating quality of DEF dosed to an EAS including a close coupled SCR unit a downstream SCR unit. A NOx conversion efficiency of the close coupled SCR unit and a NOx conversion efficiency of the downstream SCR unit are used to evaluate quality of DEF. In some embodiments, the NOx conversion efficiency of close coupled SCR unit is used to evaluate quality of DEF. Operation of an EAS using the results of the evaluation of quality of DEF are described.
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2.发明公开公开(公告)号：US20240254935A1
公开(公告)日：2024-08-01
申请号：US18635568
申请日：2024-04-15
申请人： PACCAR Inc
发明人： Trevor OTT , Maarten MEIJER , Stephen CIATTI , Brandon ROUSE
CPC分类号： F02D41/0007 , F02B37/12 , F02B39/10 , F02D41/0087 , F02D41/1454 , F02D41/18 , F02B2037/122 , F02D2200/101
摘要： Providing additional mass air flow to an engine of a vehicle to expand an operating range of cylinder deactivation (CDA) is provided. Aspects of the present disclosure describe a method and system to provide additional mass air flow to an engine using an auxiliary air source coupled to a turbocharger. When a low air-to-fuel ratio state is determined in association with operating the vehicle in CDA mode, the auxiliary air source is activated to assist the turbocharger with increase the supply of supercharged intake air to the engine. Accordingly, the operating range of CDA is expanded.
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公开(公告)号：US20220025798A1
公开(公告)日：2022-01-27
申请号：US17002496
申请日：2020-08-25
申请人： PACCAR Inc
摘要： The present disclosure describes methods for evaluating NOx conversion efficiency of a close coupled SCR unit of an EAS including the close coupled SCR unit and a downstream SCR unit. The determined NOx conversion efficiency of the close coupled SCR unit is used to diagnose the close coupled SCR unit and or EAS and to control operation parameters of the EAS and/or internal combustion engine operably connected to the EAS.
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4.发明公开公开(公告)号：US20240084751A1
公开(公告)日：2024-03-14
申请号：US17930892
申请日：2022-09-09
申请人： PACCAR Inc
发明人： Trevor OTT , Maarten MEIJER , Stephen CIATTI , Brandon ROUSE
CPC分类号： F02D41/0007 , F02B37/12 , F02B39/10 , F02D41/0087 , F02D41/1454 , F02D41/18 , F02B2037/122 , F02D2200/101
摘要： Providing additional mass air flow to an engine of a vehicle to expand an operating range of cylinder deactivation (CDA) is provided. Aspects of the present disclosure describe a method and system to provide additional mass air flow to an engine using an auxiliary air source coupled to a turbocharger. When a low air-to-fuel ratio state is determined in association with operating the vehicle in CDA mode, the auxiliary air source is activated to assist the turbocharger with increase the supply of supercharged intake air to the engine. Accordingly, the operating range of CDA is expanded.
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公开(公告)号：US20230034184A1
公开(公告)日：2023-02-02
申请号：US17965540
申请日：2022-10-13
申请人： PACCAR Inc
摘要： The present disclosure describes methods for evaluating quality of DEF dosed to an EAS including a close coupled SCR unit a downstream SCR unit. A NOx conversion efficiency of the close coupled SCR unit and a NOx conversion efficiency of the downstream SCR unit are used to evaluate quality of DEF. In some embodiments, the NOx conversion efficiency of close coupled SCR unit is used to evaluate quality of DEF. Operation of an EAS using the results of the evaluation of quality of DEF are described.
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公开(公告)号：US20220316376A1
公开(公告)日：2022-10-06
申请号：US17714810
申请日：2022-04-06
申请人： PACCAR Inc
摘要： The present disclosure describes methods for evaluating ammonia storage capacity of a close-coupled SCR unit while remaining compliant with prescribed emissions limits, methods of controlling an emission aftertreatment system including multiple SCR units and emission management systems for a vehicle including an internal combustion engine and an emission aftertreatment system that includes two or more SCR units.
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公开(公告)号：US20220025799A1
公开(公告)日：2022-01-27
申请号：US17002507
申请日：2020-08-25
申请人： PACCAR Inc
摘要： The present disclosure describes methods for evaluating ammonia storage capacity of a close-coupled SCR unit while remaining compliant with prescribed emissions limits, methods of controlling an emission aftertreatment system including multiple SCR units and emission management systems for a vehicle including an internal combustion engine and an emission aftertreatment system that includes two or more SCR units.
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