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公开(公告)号：US11999367B2
公开(公告)日：2024-06-04
申请号：US17483307
申请日：2021-09-23
Applicant: PACCAR Inc
CPC classification number: B60W50/06 , B60W40/06 , B60W2520/28 , B60W2540/10
Abstract: Dynamic throttle pedal filtering of a vehicle is provided. An automated throttle filtering system may be included in the vehicle that may operate to filter throttle pedal input based on detection of a rough driving surface. The rough driving surface detection may be based on an evaluation of wheel speed signals or an indication of traction loss. The throttle pedal input may be filtered corresponding to rough driving surface magnitude values determined based on the wheel speed signals. For example, filtered torque demand values may be determined based on the rough driving surface magnitude values and included in a torque demand request communicated to the vehicle's powertrain system. The resulting torque output may modulate an undesirable oscillating torque demand that may be generated in relation to operation of the vehicle on a rough driving surface.
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公开(公告)号：US20240052767A1
公开(公告)日：2024-02-15
申请号：US18302648
申请日：2023-04-18
Applicant: PACCAR Inc
Inventor： Cynthia Chaffin Webb , Charles Wayne Reinhardt Swart
CPC classification number: F01N3/208 , B01D53/9431 , B01D53/9495 , F01N3/28 , F01N13/009
Abstract: 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.
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公开(公告)号：US11879367B2
公开(公告)日：2024-01-23
申请号：US17002570
申请日：2020-08-25
Applicant: PACCAR Inc
Inventor： Cynthia Chaffin Webb , Charles Wayne Reinhardt Swart , Maarten Meijer , Varun Ramesh
CPC classification number: F01N3/208 , F01N11/00 , F02D41/1441 , F02D41/1463 , F02D41/222 , F01N2390/02 , F01N2550/05 , F01N2560/026 , F01N2560/14 , F01N2590/08 , F01N2610/02 , F01N2610/1453 , F01N2900/1402
Abstract: A heavy-duty truck has a diesel engine, an exhaust after-treatment system, and an engine control unit. The exhaust after-treatment system includes a close-coupled selective catalytic reduction system and an underbody selective catalytic reduction system, a first NOx sensor upstream of the close-coupled selective catalytic reduction system, a second NOx sensor between the two selective catalytic reduction systems, and a third NOx sensor downstream of the underbody selective catalytic reduction system. The engine control unit may perform methods allowing intrusive diagnostics to be performed on exhaust gas NOx sensors using the selective catalytic reduction systems during normal operation of the heavy-duty truck.
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公开(公告)号：US20230122537A1
公开(公告)日：2023-04-20
申请号：US17504595
申请日：2021-10-19
Applicant: PACCAR Inc.
Abstract: 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.
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公开(公告)号：US11473478B1
公开(公告)日：2022-10-18
申请号：US17482252
申请日：2021-09-22
Applicant: PACCAR Inc.
Abstract: An exhaust aftertreatment system and associated method for purifying an exhaust gas feedstream of a lean-burn or other compression-ignition internal combustion engine is described. An instruction set is executable to determine an engine-out NO2 concentration upstream of an oxidation catalyst and determine a first parameter associated with O2 concentration. A consumption of oxygen in the oxidation catalyst due to oxidation reactions is determined, and a concentration of NO2 generated by the oxidation catalyst is determined based upon the consumption of oxygen in the oxidation catalyst. A concentration of NO2 downstream of the oxidation catalyst is determined. A NO2/NOx ratio in the exhaust gas feedstream downstream of the oxidation catalyst is determined based upon the concentration of NO2 downstream of the oxidation catalyst and the NOx concentration measured by the downstream NOx sensor. The oxidation catalyst is evaluated based upon the NO2/NOx ratio.
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Patent Agency Ranking
公开(公告)号：US11313301B2
公开(公告)日：2022-04-26
申请号：US16817201
申请日：2020-03-12
Applicant: PACCAR Inc
Inventor： Cynthia Chaffin Webb , Michael Douglas Gerty , Uday Vadlamani , Kimberly Denise McKinnon , Constantin Emil Nedelcu , Maarten Meijer , Charles Wayne Reinhardt Swart
Abstract: 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：US20220025802A1
公开(公告)日：2022-01-27
申请号：US17002570
申请日：2020-08-25
Applicant: PACCAR Inc
Inventor： Cynthia Chaffin Webb , Charles Wayne Reinhardt Swart , Maarten Meijer , Varun Ramesh
Abstract: A heavy-duty truck has a diesel engine, an exhaust after-treatment system, and an engine control unit. The exhaust after-treatment system includes a close-coupled selective catalytic reduction system and an underbody selective catalytic reduction system, a first NOx sensor upstream of the close-coupled selective catalytic reduction system, a second NOx sensor between the two selective catalytic reduction systems, and a third NOx sensor downstream of the underbody selective catalytic reduction system. The engine control unit may perform methods allowing intrusive diagnostics to be performed on exhaust gas NOx sensors using the selective catalytic reduction systems during normal operation of the heavy-duty truck.
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公开(公告)号：US20250048495A1
公开(公告)日：2025-02-06
申请号：US18766031
申请日：2024-07-08
Applicant: PACCAR Inc.
Inventor： Charles Wayne Reinhardt Swart
Abstract: Systems and methods for modulating power provided to a heating element of a vehicle exhaust system is provided. One system includes a controller controlling a switch, and an alternator having a first field terminal input, wherein the first field terminal input is connected to the switch. The system further includes a heating element connected to at least an output of the alternator. The controller is configured to determine a power demand for the electric heating element and modulate the first field terminal input to cause the alternator to provide power to the heating element according to the power demand.
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公开(公告)号：US12037956B1
公开(公告)日：2024-07-16
申请号：US18463076
申请日：2023-09-07
Applicant: PACCAR Inc
Inventor： Charles Wayne Reinhardt Swart , Stephen Anthony Ciatti , Nick Hertlein
CPC classification number: F02D41/062 , F02D13/0215 , F02D41/3076 , F02P5/1504 , F02D2200/021 , F02D2200/101
Abstract: A method for starting a vehicle's engine includes: causing a crankshaft of the engine to begin to rotate and to rotate through a first plurality of rotations; and causing, for each combustion chamber of at least one combustion chamber of the engine, an exhaust valve of the combustion chamber to remain in an opened position while the crankshaft rotates through the first plurality of rotations and prior to fuel being injected into the combustion chamber.
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公开(公告)号：US11879375B2
公开(公告)日：2024-01-23
申请号：US17830123
申请日：2022-06-01
Applicant: PACCAR Inc
Inventor： Cynthia Chaffin Webb , John Lyle Lahti , Charles Wayne Reinhardt Swart
CPC classification number: 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
Abstract: 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.
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