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公开(公告)号：US11598240B2
公开(公告)日：2023-03-07
申请号：US17220815
申请日：2021-04-01
发明人： Thaddeus A Chmielewski , Gurpreet Matharu , Marcus Bengtsson , Carlos Armesto , Bret Alan Zimmerman , Jim Bromham
IPC分类号： F01N3/20
摘要： Methods and systems are provided for estimation of a volume of liquid diesel exhaust fluid (DEF) contained within a DEF tank. In one example, a method for the estimation of the volume of liquid DEF in a DEF tank during DEF freezing conditions may include activating a heater contained within the DEF tank, and then switching estimation of the volume of liquid DEF via a first transfer function to estimation of the volume of liquid DEF via a second transfer function.
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公开(公告)号：US20220316375A1
公开(公告)日：2022-10-06
申请号：US17220815
申请日：2021-04-01
发明人： Thaddeus A Chmielewski , Gurpreet Matharu , Marcus Bengtsson , Carlos Armesto , Bret Alan Zimmerman , Jim Bromham
IPC分类号： F01N3/20
摘要： Methods and systems are provided for estimation of a volume of liquid diesel exhaust fluid (DEF) contained within a DEF tank. In one example, a method for the estimation of the volume of liquid DEF in a DEF tank during DEF freezing conditions may include activating a heater contained within the DEF tank, and then switching estimation of the volume of liquid DEF via a first transfer function to estimation of the volume of liquid DEF via a second transfer function.
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