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公开(公告)号:US11506098B1
公开(公告)日:2022-11-22
申请号:US17652573
申请日:2022-02-25
发明人: Jason Brian Martz , Liangjun Hu , Paul Joseph Tennison , Eric Matthew Kurtz , Gregory McConville
摘要: Methods and systems are provided for a turbocharger. In one example, a method may include flowing bleed air to control a catalyst temperature. The bleed air is directed from a bleed port of a compressor of an engine system.
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公开(公告)号:US11480122B1
公开(公告)日:2022-10-25
申请号:US17303212
申请日:2021-05-24
发明人: Jason Brian Martz , Christopher Cundy , Daniel William Kantrow , Eric Matthew Kurtz , Daniel Joseph Styles , Sathish Atluri , Clayton Mikush , Joshua Zachary Fried
IPC分类号: F02D41/38 , F02D41/02 , F02B75/02 , F01L13/00 , F02D41/06 , F01L13/08 , F01N13/10 , F02D41/00
摘要: Methods and systems are provided for cylinder deactivation to reduce tailpipe emissions and increase exhaust temperature. In one example, a method may include operating a first set of cylinders in a first combustion cycle over modified eight strokes and a second set of cylinders in a second combustion cycle over modified four strokes. Each cylinder in the first set of cylinders may be selectively deactivated via a variable displacement engine (VDE) mechanism while each cylinder in the second set of cylinders may be selectively deactivated via an active decompression technology (ADT) mechanism.
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公开(公告)号:US11473494B1
公开(公告)日:2022-10-18
申请号:US17220630
申请日:2021-04-01
摘要: Methods and systems are provided for a turbocharger. In one example, a method may include bypassing exhaust gases flowing to the turbocharger in response to a catalyst temperature being less than a threshold temperature. The bypassing includes opening a bypass valve and adjusting a position of one or more turbine nozzle vanes.
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公开(公告)号:US20230033813A1
公开(公告)日:2023-02-02
申请号:US17444044
申请日:2021-07-29
IPC分类号: F02D13/02 , F02D41/40 , F02D13/06 , F02M35/104 , F01N13/10
摘要: Methods and systems are provided for re-combustion of exhaust in a cylinder of a multi-cylinder engine in order to increase the temperature of the exhaust for enhancing catalytic conversion within the multi-cylinder engine. In one example, a method may include expelling combusted gases from the cylinder into an intake manifold via an intake valve during an exhaust stroke, in order to rebreathe in the combusted gases from the intake manifold via the intake valve in a subsequent intake stroke.
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公开(公告)号:US20220316389A1
公开(公告)日:2022-10-06
申请号:US17220630
申请日:2021-04-01
摘要: Methods and systems are provided for a turbocharger. In one example, a method may include bypassing exhaust gases flowing to the turbocharger in response to a catalyst temperature being less than a threshold temperature. The bypassing includes opening a bypass valve and adjusting a position of one or more turbine nozzle vanes.
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公开(公告)号:US11181017B2
公开(公告)日:2021-11-23
申请号:US16830773
申请日:2020-03-26
摘要: Methods and systems for maintaining a temperature of catalyst above a threshold temperature during vehicle braking and coasting is described. In one example, engine pumping work may be increased without increasing flow of cool fresh air through the engine's exhaust system to provide a desired level of engine braking. The net air flow through the engine may be reduced via activating a decompression actuator.
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公开(公告)号:US20230124649A1
公开(公告)日:2023-04-20
申请号:US18069445
申请日:2022-12-21
IPC分类号: F02D13/02 , F02M35/104 , F02D41/40 , F02D13/06 , F01N13/10
摘要: Methods and systems are provided for re-combustion of exhaust in a cylinder of a multi-cylinder engine in order to increase the temperature of the exhaust for enhancing catalytic conversion within the multi-cylinder engine. In one example, a method may include expelling combusted gases from the cylinder into an intake manifold via an intake valve during an exhaust stroke, in order to rebreathe in the combusted gases from the intake manifold via the intake valve in a subsequent intake stroke.
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公开(公告)号:US11585284B1
公开(公告)日:2023-02-21
申请号:US17444044
申请日:2021-07-29
IPC分类号: F02D13/02 , F02D41/40 , F01N13/10 , F02D13/06 , F02M35/104
摘要: Methods and systems are provided for re-combustion of exhaust in a cylinder of a multi-cylinder engine in order to increase the temperature of the exhaust for enhancing catalytic conversion within the multi-cylinder engine. In one example, a method may include expelling combusted gases from the cylinder into an intake manifold via an intake valve during an exhaust stroke, in order to rebreathe in the combusted gases from the intake manifold via the intake valve in a subsequent intake stroke.
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公开(公告)号:US11519313B1
公开(公告)日:2022-12-06
申请号:US17444471
申请日:2021-08-04
摘要: Methods and systems are provided for expediting exhaust catalyst light-off prior to an anticipated engine cold-start event. In one example, a method may include, in anticipation of an engine cold-start, preemptively operating an electric booster and routing compressed air to the catalyst to increase a temperature of the exhaust catalyst while maintaining the engine inactive.
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公开(公告)号:US20210301690A1
公开(公告)日:2021-09-30
申请号:US16830773
申请日:2020-03-26
摘要: Methods and systems for maintaining a temperature of catalyst above a threshold temperature during vehicle braking and coasting is described. In one example, engine pumping work may be increased without increasing flow of cool fresh air through the engine's exhaust system to provide a desired level of engine braking. The net air flow through the engine may be reduced via activating a decompression actuator.
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