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公开(公告)号：US20230129315A1
公开(公告)日：2023-04-27
申请号：US18088318
申请日：2022-12-23
IPC分类号： F02B9/04 , F02M26/13 , F02D13/02 , F02D41/00 , F02D41/06 , F02D41/40 , F02P5/145 , F02P19/04 , F02P21/00 , F02P23/00
摘要： Embodiments disclosed herein relate generally to systems and methods of operating internal combustion (IC) engines, and more specifically to systems and methods of starting compression ignition (CI) engines when the surrounding environment is significantly colder than the normal operating temperature of the engine (i.e., “cold-starting”). In some embodiments, the CI engine can include an ignition-assist device. In some embodiments, a method of operating a CI engine during cold-start can include opening an intake valve to draw a volume of air into the combustion chamber, moving a piston from a bottom-dead-center position to a top-dead-center position in a combustion chamber at a compression ratio of between about 15 and about 25, injecting a volume of fuel, the fuel having a cetane number of less than about 30, closing the intake valve, and combusting substantially all of the volume of fuel.
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公开(公告)号：US11635004B2
公开(公告)日：2023-04-25
申请号：US17233271
申请日：2021-04-16
发明人： Rani Kiwan , Chris Paul Glugla , Brad VanDerWege
摘要： Methods and systems are provided for providing secondary air to an exhaust system during catalyst warm-up. In one example, a method may include, during a cold start condition, operating an engine with a first number of cylinders unfired and a remaining number of cylinders fired during an engine cycle, opening an intake valve of an unfired cylinder of the first number of cylinders during an expansion stroke of the unfired cylinder, and opening an exhaust valve of the unfired cylinder during a compression stroke of the unfired cylinder. In this way, the unfired cylinders may provide the secondary air to the exhaust system during a stroke that increases mixing of the secondary air with burned exhaust gas from fired cylinders, thus increasing exotherm production in the exhaust system to increase a temperature of the catalyst.
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公开(公告)号：US11628818B2
公开(公告)日：2023-04-18
申请号：US16922840
申请日：2020-07-07
发明人： Yanan Zhao , Christopher John Teslak , Stuart N. Ford , Ralph Wayne Cunningham , Judhajit Roy , Chenliu Stephen Lu , Girish Gokul Chennupalli
IPC分类号： B60W20/00 , F02N11/04 , F02N11/08 , B60W10/06 , B60W10/30 , F02D41/12 , B60W10/10 , F02D41/04 , F02D41/06 , F16H61/14 , B60W10/02 , B60K6/387 , B60K6/26
摘要： A method and system for operating a vehicle that includes an automatic transmission with a torque converter clutch is described. In one example, the method includes predicting a time that the torque converter clutch will open so that stopping rotation of the engine may be requested before the torque converter clutch is opened. The stopping rotation of the engine is requested to conserve fuel.
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公开(公告)号：US11585264B2
公开(公告)日：2023-02-21
申请号：US17356265
申请日：2021-06-23
摘要： Methods and systems are proposed for controlling a temperature of exhaust gases generated by the engine by operating an E-Turbo of the vehicle. In one embodiment, a method is provided, comprising increasing a power generated by an electric machine mechanically coupled with an exhaust turbine of an E-Turbo of a vehicle or adjusting an engine power based on a speed of the exhaust turbine and an air-fuel ratio (AFR) of an engine of the vehicle of the engine responsive to the speed of the exhaust turbine increasing above a threshold turbine speed. By increasing or decreasing the power generated by the electric machine and/or adjusting the engine power, the temperature of the exhaust gas may be maintained within a threshold temperature range where an efficiency of an aftertreatment system may be maximized, thereby reducing an emissions of the vehicle.
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公开(公告)号：US11566579B2
公开(公告)日：2023-01-31
申请号：US17063337
申请日：2020-10-05
发明人： Dallas J. Blake
摘要： A system and method for operating an engine comprises an engine speed sensor generating an engine speed signal, a throttle position sensor generating a throttle position signal, a sensor module comprising at least one of a fuel pressure sensor generating a fuel pressure signal corresponding to a fuel pressure and a fuel temperature sensor generating a fuel temperature signal corresponding to a fuel temperature into the engine. A controller is coupled to the fuel injector, the engine speed sensor and the sensor module. The controller determines a pulse width duration for the fuel injector based on engine speed and throttle position, determining a pulse width correction factor as a function of at least one of the fuel temperature signal and the fuel pressure signal, determining a second pulse width duration based on the first pulse width, and operating the fuel injector with the second pulse width duration.
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公开(公告)号：US20220412278A1
公开(公告)日：2022-12-29
申请号：US17851832
申请日：2022-06-28
发明人： Matthew K. Volmerding , Simon Guest
摘要： A controller for an aftertreatment system coupled to an engine is configured to: in response to receiving an engine shutdown signal, determine an estimated amount of ammonia stored on a selective catalytic reduction (SCR) catalyst included in the aftertreatment system; in response to determining that the estimated amount of ammonia stored in the SCR catalyst is less than an ammonia storage threshold, cause flow of a heated gas towards the SCR catalyst; cause insertion of reductant into an exhaust gas flowing through the aftertreatment system; and in response to determining that the estimated amount of ammonia stored in the SCR catalyst is equal to or greater than the ammonia storage threshold, cause shutdown of the engine.
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公开(公告)号：US11525389B2
公开(公告)日：2022-12-13
申请号：US17319321
申请日：2021-05-13
IPC分类号： F02B37/18 , F01N3/20 , F01N3/22 , F02D41/00 , F01N3/32 , F02B37/10 , F02B37/16 , F02D41/06 , F02D13/02
摘要： An engine assembly and a method of control thereof is provided. The engine assembly comprises: an exhaust gas aftertreatment device having an inlet for receiving exhaust gases leaving an engine; a heater for selectively heating gases at or upstream of the exhaust gas aftertreatment device; an air moving device for driving a flow of gases into the inlet of the exhaust gas aftertreatment device when the engine is in a non-running condition; and a controller configured to, prior to the engine being started: operate the heater to heat gases at or upstream of the inlet; and operate the air moving device to drive a flow of gases into the inlet to thereby heat the exhaust gas treatment device.
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公开(公告)号：US20220381193A1
公开(公告)日：2022-12-01
申请号：US17884473
申请日：2022-08-09
申请人： Cummins Inc.
发明人： Avra Brahma , Yongsoon Yoon
摘要： Systems and apparatuses include an engine, an aftertreatment system including a catalyst, and a controller coupled to the aftertreatment system and the engine. During a warmup period for an engine, the controller determines a value regarding a mass flow rate of exhaust gas based on information received from at least one of the engine or the aftertreatment system. The controller receives a target value regarding the mass flow rate of the exhaust gas. The controller controls at least one of the engine, the aftertreatment system, or at least one component associated therewith to reach or attempt to reach the target value regarding the mass flow rate of the exhaust gas.
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公开(公告)号：US11512627B2
公开(公告)日：2022-11-29
申请号：US17401121
申请日：2021-08-12
申请人： Deere & Company
IPC分类号： F02B39/16 , F02B39/10 , F02D41/00 , F02B37/10 , F02D41/06 , F01N5/04 , F02B33/40 , F02B37/00 , F02B37/12 , F02D29/06 , F02D35/02 , F02D41/14 , F02D41/22
摘要： An intake system for use with an internal combustion engine having one or more cylinders. The intake system including a compressor assembly having an inlet and an outlet, and where the outlet is configured to be open to and in fluid communication with at least one of the one or more cylinders. The intake system also includes a passageway extending between and in fluid communication with the inlet and the outlet and configured to direct a first flow of gasses and a controller in operable communication with the compressor assembly. Where the intake system is operable in a first mode in which the majority of gasses of the first flow of gasses flow through the passageway toward the outlet, and a second mode in which the majority of gasses of the first flow of gasses flow through the passageway toward the inlet.
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公开(公告)号：US20220372905A1
公开(公告)日：2022-11-24
申请号：US17325426
申请日：2021-05-20
发明人： David Cox , David Hesketh , Themi Petridis
摘要： Methods and system are provided to heat a catalyst of an after-treatment system for a vehicle. The after-treatment system comprises a heating module having a plurality of heating elements. Each of the plurality of heating elements is independently operable to provide thermal energy to the catalyst of the after-treatment system. One or more of the heating elements of the heating module are selectively operated to provide heat to the catalyst based on an operational parameter of the after-treatment system.
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