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公开(公告)号：US12085031B2
公开(公告)日：2024-09-10
申请号：US17523534
申请日：2021-11-10
发明人： Hitoki Sugimoto
CPC分类号： F02D41/0087 , F02D41/1454 , F02D41/182 , F02D41/22
摘要： When an intake air amount is greater than or equal to the lower limit intake air amount and less than or equal to the upper limit intake air amount, a CPU sets, from the first cylinder group that increases a detection value of an upstream air-fuel ratio sensor, one of cylinders that has the smallest cutoff frequency, which is stored in a storage device, as a cylinder to which the supply of fuel will be cut off. Then, the CPU obtains the maximum value of an upstream air-fuel ratio as a maximum air-fuel ratio. When the maximum air-fuel ratio is greater than a determination value, the CPU determines that specific cylinder fuel cutoff control is normal. When the maximum air-fuel ratio is less than or equal to the determination value, the CPU determines that the specific cylinder fuel cutoff control is anomalous.
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公开(公告)号：US12044188B2
公开(公告)日：2024-07-23
申请号：US18274243
申请日：2022-01-13
发明人： Daniel Alberer , Andreas Kerschbaummayr , Andreas Leyrer , Bernhard Ramsebner , Martin Ranzmaier
摘要： A vehicle drive has an internal combustion engine, an air conduit system, an exhaust system and a diagnostic unit for identifying a leak in the air conduit system of the internal combustion engine. The diagnostic unit is designed to carry out a method for diagnosing a leak in an internal combustion engine, including by determining mass flows in the air conduit system, and identifying a leakage mass flow.
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公开(公告)号：US11988163B2
公开(公告)日：2024-05-21
申请号：US17930892
申请日：2022-09-09
申请人： PACCAR Inc
发明人： Trevor Ott , Maarten Meijer , Stephen Ciatti , Brandon Rouse
CPC分类号： F02D41/0007 , F02B37/12 , F02B39/10 , F02D41/0087 , F02D41/1454 , F02D41/18 , F02B2037/122 , F02D2200/101
摘要： Providing additional mass air flow to an engine of a vehicle to expand an operating range of cylinder deactivation (CDA) is provided. Aspects of the present disclosure describe a method and system to provide additional mass air flow to an engine using an auxiliary air source coupled to a turbocharger. When a low air-to-fuel ratio state is determined in association with operating the vehicle in CDA mode, the auxiliary air source is activated to assist the turbocharger with increase the supply of supercharged intake air to the engine. Accordingly, the operating range of CDA is expanded.
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4.发明公开公开(公告)号：US20240141845A1
公开(公告)日：2024-05-02
申请号：US18497688
申请日：2023-10-30
发明人： Kunpeng Wang , Ke Wang , Yuan Zoe , Zhou Cao
CPC分类号： F02D41/024 , F02D41/0087 , F02D41/18 , F02D2041/1412 , F02D2200/0802
摘要： Systems and methods for aftertreatment system thermal management using cylinder deactivation and/or intake-air throttling are disclosed. Systems and methods for thermal management of an aftertreatment system are provided herein. A controller coupled to an engine and an exhaust aftertreatment system is configured to: receive a first temperature value associated with the exhaust aftertreatment system and a second temperature value associated with the engine; determine, based on comparing the first temperature value to a first threshold, a thermal management mode including a first thermal management mode or a second thermal management mode; determine, responsive to determining the thermal management mode and based on comparing the second temperature value to a second threshold, an operating mode for the thermal management mode including at least one of a first operating mode or a second operating mode; and initiate the at least one of the first or the second operating mode.
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公开(公告)号：US20230323830A1
公开(公告)日：2023-10-12
申请号：US18295172
申请日：2023-04-03
申请人： Robert Bosch GmbH
发明人： Alexandre Wagner , Benedikt Alt
CPC分类号： F02D41/182 , F02D41/1454 , F02D41/1401 , F02D2041/1433 , F02D2041/1432 , F02D2200/0616
摘要： A method for adjusting a fuel mass to be injected into an internal combustion engine. The internal combustion engine including an intake tract, at least one cylinder, and an exhaust tract. In the method, an air mass introduced into the internal combustion engine is ascertained and a fuel mass to be injected into the internal combustion engine is determined. An air-fuel ratio in the exhaust tract of the internal combustion engine is determined which is adjusted in time. Based on the time-adjusted air-fuel ratio and the calculated fuel mass to be injected, a first wall film fuel mass is calculated and the fuel mass to be injected is adjusted based on the first wall film fuel mass.
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公开(公告)号：US11635035B2
公开(公告)日：2023-04-25
申请号：US17569308
申请日：2022-01-05
摘要： Engine controllers and control schemes are provided for managing engine state transitions requiring increased compressor pressure ratios in turbocharged engines. In some circumstances, turbo lag can be mitigated by initially transitioning the engine to an intermediate engine state that directly or indirectly increases airflow through the engine and turbocharger relative to what would be possible if the engine were immediately commanded to operate at the target engine state. After reaching a point where the desired torque is actually generated at the intermediate engine state, the operational settings are gradually reduced to the target effective firing density while increasing the operational compressor pressure ratio to the target compressor ratio.
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公开(公告)号：US20230093638A1
公开(公告)日：2023-03-23
申请号：US17938913
申请日：2022-09-06
申请人： Nikki Co., Ltd.
发明人： Atsuhiro Fujii , Ryuichi Oguro
摘要： A method for controlling fuel injection to an engine may include calculating an amount of air passing through a throttle, which is actually controlled, from a calculated amount of air in an intake manifold, which is calculated from a pressure value detected by a pressure sensor installed in the intake manifold connecting the throttle and a cylinder to each other, and a calculated pressure change in the intake manifold. The method may further include predicting an actual amount of air to be sucked into the cylinder when mixed with fuel from the calculated amount of air in the intake manifold and the calculated amount of air passing through the throttle. The method may also include injecting an amount of fuel according to the predicted actual amount of air to be sucked into the cylinder.
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公开(公告)号：US11518366B2
公开(公告)日：2022-12-06
申请号：US16794874
申请日：2020-02-19
发明人： Aed M. Dudar
IPC分类号： B60W20/50 , F02D41/18 , F02D41/22 , B60W40/08 , F02M35/10 , F02N11/00 , G01M15/10 , F02D41/04 , F02D41/00 , G01N33/00
摘要： Methods and systems are provided for pinpointing a source of degradation in a vehicle engine system. In one example, a method includes spinning an engine of a vehicle unfueled in a forward and a reverse direction, in no particular order, and recording a first intake air flow and a second intake air flow, respectively, in an intake of the engine, and where the source of degradation is indicated as a function of both the first air flow and the second air flow. In this way, the degradation of the vehicle engine system may be pinpointed as to being located in the intake manifold, the exhaust system, or the engine.
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公开(公告)号：US11384700B2
公开(公告)日：2022-07-12
申请号：US17069461
申请日：2020-10-13
申请人： Cummins Inc.
发明人： Ming-Feng Hsieh , Andrew G. Kitchen , Axel Otto zur Loye , Jinghua Zhong , Richard A. Booth , Robert J. Thomas , Jisang Sun
IPC分类号： G06G7/70 , F02D37/02 , F02P5/145 , F02D41/14 , F02D41/00 , F02B37/16 , F02B37/18 , F02B37/24 , F02D41/18
摘要： Control of a spark ignited internal combustion in response to an exhaust manifold pressure measurement of an engine is disclosed. An engine out NOx amount for at least one cylinder is determined at least in part in response to the exhaust manifold pressure measurement and a brake mean effective pressure of the at least one cylinder. An operating condition of the engine is adjusted in response to the engine out NOx amount.
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公开(公告)号：US11377093B2
公开(公告)日：2022-07-05
申请号：US16879263
申请日：2020-05-20
发明人： Aed M. Dudar
IPC分类号： B60W20/50 , F02M35/09 , F02D41/04 , F02D41/22 , F01N1/16 , B60W50/08 , F02B39/10 , F01N3/021 , F02D41/18 , G05D1/00
摘要： Methods and systems are provided for diagnostics of an exhaust tuning valve during vehicle-off conditions. In one example, the engine may be reverse rotated, unfueled while the position of the exhaust is varied and an intake air flow is estimated at each position of the exhaust tuning valve. The exhaust tuning valve may be diagnosed based on a change in air flow with the variation in the position of the exhaust tuning valve.
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