公开(公告)号：US11879375B2

公开(公告)日：2024-01-23

申请号：US17830123

申请日：2022-06-01

申请人： PACCAR Inc

发明人： Cynthia Chaffin Webb ,  John Lyle Lahti ,  Charles Wayne Reinhardt Swart

IPC分类号： F01N3/20 ,  F01N3/08

CPC分类号： F01N3/208 ,  F01N3/0807 ,  F01N3/0814 ,  F01N3/0871 ,  F01N3/0885 ,  F01N3/206 ,  F01N3/2006 ,  F01N3/2066 ,  F01N2250/12 ,  F01N2550/03 ,  F01N2560/026 ,  F01N2610/02 ,  F01N2610/146 ,  F01N2900/04 ,  F01N2900/0412 ,  F01N2900/1402 ,  F01N2900/1614 ,  F01N2900/1616 ,  F01N2900/1621 ,  F01N2900/1622

摘要： Controlling exhaust after-treatment in a heavy-duty motor vehicle includes operating a diesel engine of a heavy-duty truck such that the diesel engine generates an exhaust gas flow that enters an exhaust after-treatment system of the heavy-duty truck, the exhaust after-treatment system including a selective catalytic reduction system, measuring a level of NOx gases in the exhaust gas flow downstream of the selective catalytic reduction system, and controlling a diesel exhaust fluid injector upstream of the selective catalytic reduction system to inject diesel exhaust fluid into the exhaust gas flow upstream of the selective catalytic reduction system at an injection rate that is based on the measured level of NOx gases.

公开(公告)号：US20230392532A1

公开(公告)日：2023-12-07

申请号：US17830123

申请日：2022-06-01

申请人： PACCAR Inc

发明人： Cynthia Chaffin Webb ,  John Lyle Lahti ,  Charles Wayne Reinhardt Swart

IPC分类号： F01N3/20

CPC分类号： F01N3/208 ,  F01N2900/1402 ,  F01N2610/146

摘要： Controlling exhaust after-treatment in a heavy-duty motor vehicle includes operating a diesel engine of a heavy-duty truck such that the diesel engine generates an exhaust gas flow that enters an exhaust after-treatment system of the heavy-duty truck, the exhaust after-treatment system including a selective catalytic reduction system, measuring a level of NOx gases in the exhaust gas flow downstream of the selective catalytic reduction system, and controlling a diesel exhaust fluid injector upstream of the selective catalytic reduction system to inject diesel exhaust fluid into the exhaust gas flow upstream of the selective catalytic reduction system at an injection rate that is based on the measured level of NOx gases.

公开(公告)号：US11808194B2

公开(公告)日：2023-11-07

申请号：US17720261

申请日：2022-04-13

申请人： PACCAR Inc

发明人： Cynthia Chaffin Webb ,  Charles Wayne Reinhardt Swart ,  Maarten Meijer ,  Phillip William Stephenson ,  Trevor Joseph Ott

IPC分类号： F01N3/20 ,  F01N3/10 ,  F01N3/08 ,  F01N11/00 ,  F01N9/00

CPC分类号： F01N3/208 ,  F01N3/106 ,  F01N3/2013 ,  F01N3/2033 ,  F01N3/0871 ,  F01N3/206 ,  F01N3/2066 ,  F01N9/005 ,  F01N11/005 ,  F01N2610/02 ,  F01N2610/10 ,  F01N2610/1453 ,  F01N2900/04 ,  F01N2900/1402 ,  F01N2900/1404 ,  F01N2900/1602 ,  F01N2900/18 ,  F01N2900/1811

摘要： A modular exhaust subsystem for purifying an exhaust gas feedstream of a compression-ignition internal combustion engine upstream of a base exhaust aftertreatment system includes a selective catalytic reduction (SCR) catalyst, and a first exhaust gas sensor and a first temperature sensor that are arranged to monitor the SCR catalyst. A reductant delivery system is arranged to inject a reductant upstream of the SCR catalyst. A controller is in communication with an engine-out exhaust gas sensor, a second exhaust gas sensor and a second temperature sensor that are arranged to monitor the base exhaust aftertreatment system. The controller controls the reductant delivery system to inject the reductant into the exhaust gas feedstream upstream of the SCR catalyst based upon inputs from the first and second exhaust gas sensors, the engine-out exhaust gas sensor, and the first and second temperature sensors.

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

IPC分类号： F02D41/06 ,  F02M26/13 ,  F01N3/021 ,  F01N3/20 ,  F01N3/28 ,  F02B63/04 ,  F02D17/02

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.

公开(公告)号：US20220364489A1

公开(公告)日：2022-11-17

申请号：US17737641

申请日：2022-05-05

申请人： PACCAR Inc

发明人： Cynthia Chaffin Webb ,  Charles Wayne Reinhardt Swart

IPC分类号： F01N3/20 ,  B01D53/94 ,  F01N3/28

摘要： A heavy duty truck includes a diesel engine that generates an exhaust gas flow and an exhaust after-treatment system for treatment of the exhaust gas flow. The exhaust after-treatment system includes at least one temperature sensor at an underbody SCR system within the exhaust after-treatment system and a DEF injector upstream of a close-coupled SCR system within the exhaust after-treatment system. The DEF injector is operated to inject DEF into the exhaust gas flow at a rate that varies as a function of a temperature measured by the temperature sensor.

公开(公告)号：US20240200481A1

公开(公告)日：2024-06-20

申请号：US18395125

申请日：2023-12-22

申请人： PACCAR Inc

发明人： Cynthia Chaffin Webb ,  John Lyle Lahti ,  Charles Wayne Reinhardt Swart

IPC分类号： F01N3/20 ,  F01N3/08

CPC分类号： F01N3/208 ,  F01N3/0807 ,  F01N3/0814 ,  F01N3/0871 ,  F01N3/0885 ,  F01N3/2006 ,  F01N3/206 ,  F01N3/2066 ,  F01N2250/12 ,  F01N2550/03 ,  F01N2560/026 ,  F01N2610/02 ,  F01N2610/146 ,  F01N2900/04 ,  F01N2900/0412 ,  F01N2900/1402 ,  F01N2900/1614 ,  F01N2900/1616 ,  F01N2900/1621 ,  F01N2900/1622

摘要： Controlling exhaust after-treatment in a heavy-duty motor vehicle includes operating a diesel engine of a heavy-duty truck such that the diesel engine generates an exhaust gas flow that enters an exhaust after-treatment system of the heavy-duty truck, the exhaust after-treatment system including a selective catalytic reduction system, measuring a level of NOx gases in the exhaust gas flow downstream of the selective catalytic reduction system, and controlling a diesel exhaust fluid injector upstream of the selective catalytic reduction system to inject diesel exhaust fluid into the exhaust gas flow upstream of the selective catalytic reduction system at an injection rate that is based on the measured level of NOx gases.

公开(公告)号：US20240183303A1

公开(公告)日：2024-06-06

申请号：US18440570

申请日：2024-02-13

申请人： PACCAR Inc

发明人： Trevor Joseph Ott ,  Cynthia Chaffin Webb ,  Charles Wayne Reinhardt Swart

IPC分类号： F01N11/00 ,  F01N3/10 ,  F01N3/20 ,  F01N13/00

CPC分类号： F01N11/002 ,  F01N3/103 ,  F01N3/2013 ,  F01N3/208 ,  F01N13/008 ,  F01N2900/1404 ,  F01N2900/1411

摘要： A lean-burn internal combustion engine and an exhaust aftertreatment system having an oxidation catalyst are described. A controller determines a fueling rate and a mass flowrate of the exhaust gas feedstream. An inlet temperature of the exhaust gas feedstream upstream of the oxidation catalyst is determined via the first temperature sensor, and an in-use outlet temperature of the exhaust gas feedstream is determined downstream of the oxidation catalyst via the second temperature sensor. An expected outlet temperature from the oxidation catalyst is determined based upon the inlet temperature, the fueling rate, and the mass flowrate of the exhaust gas feedstream. The oxidation catalyst is evaluated based upon the expected outlet temperature and the in-use outlet temperature.

公开(公告)号：US11661878B2

公开(公告)日：2023-05-30

申请号：US17737641

申请日：2022-05-05

申请人： PACCAR Inc

发明人： Cynthia Chaffin Webb ,  Charles Wayne Reinhardt Swart

IPC分类号： F01N3/20 ,  B01D53/94 ,  F01N3/28 ,  F01N13/00

CPC分类号： F01N3/208 ,  B01D53/9431 ,  B01D53/9495 ,  F01N3/28 ,  F01N3/2066 ,  F01N13/009 ,  F01N13/0093 ,  F01N2570/14 ,  F01N2590/08 ,  F01N2610/02 ,  F01N2610/146 ,  F01N2900/0422 ,  F01N2900/1404 ,  F01N2900/1602

摘要： A heavy duty truck includes a diesel engine that generates an exhaust gas flow and an exhaust after-treatment system for treatment of the exhaust gas flow. The exhaust after-treatment system includes at least one temperature sensor at an underbody SCR system within the exhaust after-treatment system and a DEF injector upstream of a close-coupled SCR system within the exhaust after-treatment system. The DEF injector is operated to inject DEF into the exhaust gas flow at a rate that varies as a function of a temperature measured by the temperature sensor.

公开(公告)号：US20230072563A1

公开(公告)日：2023-03-09

申请号：US17901697

申请日：2022-09-01

申请人： PACCAR Inc

发明人： Jorge Rafael Lozada Ramirez ,  Carl Anders Hergart ,  Cynthia Chaffin Webb ,  Christopher S. Balton

IPC分类号： F01N3/20 ,  B60W10/06 ,  B60W10/11 ,  B60W30/188 ,  B60W50/00 ,  F02D41/02 ,  G01C21/34 ,  G05B13/04

摘要： Embodiments are directed towards controlling uncontrolled release of ammonia from an engine of a vehicle. An estimated status of the engine is determined prior to an event, such as an estimated load on the engine prior to the vehicle going up a hill. A predictive model of uncontrolled ammonia release is generated for the estimated status. At least one engine-related countermeasure is selected based on the predictive model. If the predictive model of uncontrolled ammonia release with the selected countermeasures satisfies a threshold condition, then the selected engine-related countermeasure is employed.

公开(公告)号：US11434800B2

公开(公告)日：2022-09-06

申请号：US17141038

申请日：2021-01-04

申请人： PACCAR Inc

发明人： Jorge Rafael Lozada Ramirez ,  Carl Anders Hergart ,  Cynthia Chaffin Webb ,  Christopher S. Balton

IPC分类号： F01N3/20 ,  F02D41/02 ,  B60W30/188 ,  B60W10/11 ,  B60W10/06 ,  B60W50/00 ,  G05B13/04 ,  G01C21/34

摘要： Embodiments are directed towards controlling uncontrolled release of ammonia from an engine of a vehicle. An estimated status of the engine is determined prior to an event, such as an estimated load on the engine prior to the vehicle going up a hill. A predictive model of uncontrolled ammonia release is generated for the estimated status. At least one engine-related countermeasure is selected based on the predictive model. If the predictive model of uncontrolled ammonia release with the selected countermeasures satisfies a threshold condition, then the selected engine-related countermeasure is employed.