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公开(公告)号：US20220065182A1
公开(公告)日：2022-03-03
申请号：US17373247
申请日：2021-07-12
发明人： Louis Joe Serrano , Xiaoping Cai , Yongyan Cao , Vijay Srinivasan , Kevin Shikui Chen , Andrea Marie Evans , Avra Brahma
摘要： A variety of methods and arrangements are described for managing recharging of cylinders of an internal combustion engine during skip fire operation of the engine. In one method, a maximum allowed deactivation time for a cylinder is determined and the cylinder is recharged before the maximum allowed deactivation time is exceeded.
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公开(公告)号：US20240191667A1
公开(公告)日：2024-06-13
申请号：US18582574
申请日：2024-02-20
CPC分类号： F02D41/029 , F02D41/0087 , F02D41/1448 , F02D41/1454 , F01N3/0233 , F01N3/0864 , F01N9/002 , F01N9/005 , F01N11/002 , F01N11/005 , F01N2430/02 , F01N2430/06 , F01N2430/08 , F01N2430/085 , F01N2430/10 , F01N2550/04 , F01N2560/025 , F01N2900/0418 , F01N2900/0421 , F01N2900/0422 , F01N2900/1606 , F01N2900/1611 , F01N2900/1806 , F02D2200/021 , F02D2200/701
摘要： A system includes an exhaust aftertreatment system including a particulate filter and a controller. The controller is configured to: receive information comprising a temperature regarding a filter of the aftertreatment system; and responsive to determining that the temperature regarding the filter is below a temperature threshold, command the engine to operate according to a first firing fraction. The first firing fraction may define a number of active cylinders of the engine relative to a total number of cylinders of the engine, and correspond to a predetermined temperature value of the filter.
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公开(公告)号：US20230407804A1
公开(公告)日：2023-12-21
申请号：US17843473
申请日：2022-06-17
CPC分类号： F02D41/029 , F02D41/0087 , F02D41/1454 , F02D41/1448 , F02D2200/021 , F02D2200/701
摘要： A system includes an exhaust aftertreatment system including a particulate filter and a controller. The controller is configured to: receive a particulate filter regeneration event trigger; receive information, the information comprising a temperature regarding the particulate filter; determine the temperature regarding the particulate filter is below a temperature threshold associated with a particulate filter regeneration event; and responsive to determining the temperature regarding the particulate filter is below the temperature threshold, command the engine to operate in a cylinder deactivation mode, whereby at least one cylinder of a plurality of cylinders of the engine is deactivated.
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公开(公告)号：US20220154657A1
公开(公告)日：2022-05-19
申请号：US16950632
申请日：2020-11-17
发明人： Vijay Srinivasan
摘要： A variety of methods and arrangements are described for managing transitions between operational states of an internal combustion engine during skip fire operation of the engine.
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公开(公告)号：US10927780B2
公开(公告)日：2021-02-23
申请号：US16839609
申请日：2020-04-03
发明人： Vijay Srinivasan
摘要： A skip fire controlled internal combustion engine supplies motive power to move to a platform. The skip fire engine controller includes a skip fire module arranged to determine an operational firing fraction and associated cylinder load for delivering a desired engine output. The operational firing fraction is based in part on the platform weight.
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公开(公告)号：US11359561B2
公开(公告)日：2022-06-14
申请号：US16950632
申请日：2020-11-17
发明人： Vijay Srinivasan
摘要： A variety of methods and arrangements are described for managing transitions between operational states of an internal combustion engine during skip fire operation of the engine.
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公开(公告)号：US11946423B2
公开(公告)日：2024-04-02
申请号：US17373247
申请日：2021-07-12
发明人： Louis Joe Serrano , Xiaoping Cai , Yongyan Cao , Vijay Srinivasan , Kevin Shikui Chen , Andrea Marie Evans , Avra Brahma
CPC分类号： F02D41/0087 , F02D35/024 , F02D41/0007 , F02D41/0055 , F02D41/0077 , F02D41/1401 , F02D41/38 , F02D2041/0012 , F02D2041/141 , F02D2041/1433 , F02D2200/0406
摘要： A variety of methods and arrangements are described for managing recharging of cylinders of an internal combustion engine during skip fire operation of the engine. In one method, a maximum allowed deactivation time for a cylinder is determined and the cylinder is recharged before the maximum allowed deactivation time is exceeded.
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公开(公告)号：US11933237B2
公开(公告)日：2024-03-19
申请号：US17843473
申请日：2022-06-17
CPC分类号： F02D41/029 , F02D41/0087 , F02D41/1448 , F02D41/1454 , F01N3/0233 , F01N3/0864 , F01N9/002 , F01N9/005 , F01N11/002 , F01N11/005 , F01N2430/02 , F01N2430/06 , F01N2430/08 , F01N2430/085 , F01N2430/10 , F01N2550/04 , F01N2560/025 , F01N2900/0418 , F01N2900/0421 , F01N2900/0422 , F01N2900/1606 , F01N2900/1611 , F01N2900/1806 , F02D2200/021 , F02D2200/701
摘要： A system includes an exhaust aftertreatment system including a particulate filter and a controller. The controller is configured to: receive a particulate filter regeneration event trigger; receive information, the information comprising a temperature regarding the particulate filter; determine the temperature regarding the particulate filter is below a temperature threshold associated with a particulate filter regeneration event; and responsive to determining the temperature regarding the particulate filter is below the temperature threshold, command the engine to operate in a cylinder deactivation mode, whereby at least one cylinder of a plurality of cylinders of the engine is deactivated.
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公开(公告)号：US11549455B2
公开(公告)日：2023-01-10
申请号：US16839651
申请日：2020-04-03
摘要： An internal combustion engine operates so that it delivers zero or negative torque. The engine operates in either a deceleration cylinder cut off (DCCO) mode or skip cylinder compression braking mode. In the skip cylinder compression braking mode, selected working cycles of selected working chambers are operated in a compression release braking mode. Accordingly, individual working chambers are sometimes not fired and sometimes operated in the compression release braking mode while the engine is operating in the skip cylinder compression braking mode.
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公开(公告)号：US11459965B2
公开(公告)日：2022-10-04
申请号：US17186979
申请日：2021-02-26
发明人： Vijay Srinivasan , Louis J. Serrano , Xiaoping Cai , J. Steven Kolhouse , Avra Brahma , Adrian P. Dale
摘要： Managing firing fraction transitions of a variable displacement internal combustion engines by (a) avoiding transport delays in an Exhaust Gas Recirculation (EGR) feed by starting movement of an EGR valve position after a decision to transition to a new firing fraction has been made, but prior to the start of the transition and (b) adjusting the EGR valve as needed during the transition so as to maintain an EGR fraction within a predetermined range during the transition. By performing both (a) and (b), spikes of nitrous oxide (NOx) and/or hydrocarbon emissions are reduced or altogether eliminated during the transition.
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