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公开(公告)号：US20220397073A1
公开(公告)日：2022-12-15
申请号：US17705570
申请日：2022-03-28
申请人： PACCAR Inc
发明人： Cynthia Chaffin Webb , Michael Douglas Gerty , Uday Vadlamani , Kimberly Denise McKinnon , Constantin Emil Nedelcu , Maarten Meijer , Charles Wayne Reinhardt Swart
摘要： Methods of improving SCR performance in heavy duty vehicles may use multiple interdependent control techniques to increase engine exhaust temperatures in a fuel efficient manner. One method combines cylinder deactivation and mechanical loading of an engine by an electrical generator used to input energy into an exhaust stream to manipulate the exhaust temperature through the combined effect of modified air-to-fuel ratio and supplemental energy input. In particular, cylinder deactivation may be used to modify the engine air flowrate and the electric generator may be used to apply mechanical load on the engine to manipulate the engine fuel flow rate to control the engine air-to-fuel ratio and thereby increase exhaust temperatures. The exhaust temperatures may be further increased by using the electrical generator to add the energy generated as input energy to the exhaust stream.
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公开(公告)号：US11761396B2
公开(公告)日：2023-09-19
申请号：US17705570
申请日：2022-03-28
申请人： PACCAR Inc
发明人： Cynthia Chaffin Webb , Michael Douglas Gerty , Uday Vadlamani , Kimberly Denise McKinnon , Constantin Emil Nedelcu , Maarten Meijer , Charles Wayne Reinhardt Swart
CPC分类号： F02D41/068 , F01N3/021 , F01N3/2013 , F01N3/2066 , F01N3/28 , F02B63/04 , F02D17/02 , F02M26/13
摘要： Methods of improving SCR performance in heavy duty vehicles may use multiple interdependent control techniques to increase engine exhaust temperatures in a fuel efficient manner. One method combines cylinder deactivation and mechanical loading of an engine by an electrical generator used to input energy into an exhaust stream to manipulate the exhaust temperature through the combined effect of modified air-to-fuel ratio and supplemental energy input. In particular, cylinder deactivation may be used to modify the engine air flowrate and the electric generator may be used to apply mechanical load on the engine to manipulate the engine fuel flow rate to control the engine air-to-fuel ratio and thereby increase exhaust temperatures. The exhaust temperatures may be further increased by using the electrical generator to add the energy generated as input energy to the exhaust stream.
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公开(公告)号：US11313301B2
公开(公告)日：2022-04-26
申请号：US16817201
申请日：2020-03-12
申请人： PACCAR Inc
发明人： Cynthia Chaffin Webb , Michael Douglas Gerty , Uday Vadlamani , Kimberly Denise McKinnon , Constantin Emil Nedelcu , Maarten Meijer , Charles Wayne Reinhardt Swart
摘要： Methods of improving SCR performance in heavy duty vehicles may use multiple interdependent control techniques to increase engine exhaust temperatures in a fuel efficient manner. One method combines cylinder deactivation and mechanical loading of an engine by an electrical generator used to input energy into an exhaust stream to manipulate the exhaust temperature through the combined effect of modified air-to-fuel ratio and supplemental energy input. In particular, cylinder deactivation may be used to modify the engine air flowrate and the electric generator may be used to apply mechanical load on the engine to manipulate the engine fuel flow rate to control the engine air-to-fuel ratio and thereby increase exhaust temperatures. The exhaust temperatures may be further increased by using the electrical generator to add the energy generated as input energy to the exhaust stream.
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