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公开(公告)号：US09926868B2
公开(公告)日：2018-03-27
申请号：US15298542
申请日：2016-10-20
Applicant: Tula Technology, Inc. , GM Global Technology Operations LLC
Inventor： Louis J. Serrano , Steven E. Carlson , Steven J. Haase , Donavan L. Dibble , Allen B. Rayl
CPC classification number: F02D41/0087 , B60W10/023 , B60W10/06 , B60W30/188 , B60W2710/025 , F02D17/02 , F02D37/02 , F02D41/0215 , F02D2041/001 , F02D2250/21 , F02P5/145 , F02P5/1504
Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire and potentially variable displacement operation of an engine. In general, cam first transition strategies are described in which the cam phase is changed to, or close to a target cam phase before a corresponding firing fraction change is implemented. When the cam phase change associated with a desired firing fraction change is relatively large, the firing fraction change is divided into a series of two or more firing fraction change steps—with each step using a cam first transition approach. A number of intermediate target selection schemes are described as well.
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公开(公告)号：US10094313B2
公开(公告)日：2018-10-09
申请号：US15902685
申请日：2018-02-22
Applicant: Tula Technology, Inc. , GM Global Technology Operations LLC
Inventor： Louis J. Serrano , Steven E. Carlson , Steven J. Haase , Donavan L. Dibble , Allen B. Rayl
Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire or other dynamic firing level modulation operation of an engine. In general, actuator first transition strategies are described in which an actuator position (e.g., cam phase, TCC slip, etc.) is changed to, or close to a target position before a corresponding firing fraction change is implemented. When the actuator change associated with a desired firing fraction change is relatively large, the firing fraction change is divided into a series of two or more firing fraction change steps. A number of intermediate target selection schemes are described as well.
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公开(公告)号：US20180058345A1
公开(公告)日：2018-03-01
申请号：US15245652
申请日：2016-08-24
Applicant: GM Global Technology Operations LLC
Inventor： Allen B. Rayl , Donovan L. Dibble , Darrell W. Burleigh , Steven J. Haase
CPC classification number: F02D17/02 , F02D41/0002 , F02D41/1406 , F02D41/26 , F02D2200/1004 , F02D2700/02 , F02D2700/05
Abstract: A method for operating an internal combustion engine includes providing a vehicle having an internal combustion gasoline engine including multiple cylinders and wherein the engine is capable of running on at least one of a plurality firing fractions, providing a vacuum offset (Offsetvac) to adjust airflow capacity for each of the plurality of firing fractions, determining a torque capacity of each of the plurality firing fractions and a plurality of available firing fractions that provides at least enough torque capacity to accommodate a current torque requested (Treq), determining a plurality of viable firing fractions of the plurality of available firing fractions, and determining and implementing an optimal firing fraction of the viable firing fractions if the optimal firing fraction provides enough fuel economy benefit over a current firing fraction.
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公开(公告)号：US09903283B1
公开(公告)日：2018-02-27
申请号：US15245652
申请日：2016-08-24
Applicant: GM Global Technology Operations LLC
Inventor： Allen B. Rayl, Jr. , Donovan L. Dibble , Darrell W. Burleigh , Steven J. Haase
CPC classification number: F02D17/02 , F02D41/0002 , F02D41/1406 , F02D41/26 , F02D2200/1004 , F02D2700/02 , F02D2700/05
Abstract: A method for operating an internal combustion engine includes providing a vehicle having an internal combustion gasoline engine including multiple cylinders and wherein the engine is capable of running on at least one of a plurality firing fractions, providing a vacuum offset (Offsetvac) to adjust airflow capacity for each of the plurality of firing fractions, determining a torque capacity of each of the plurality firing fractions and a plurality of available firing fractions that provides at least enough torque capacity to accommodate a current torque requested (Treq), determining a plurality of viable firing fractions of the plurality of available firing fractions, and determining and implementing an optimal firing fraction of the viable firing fractions if the optimal firing fraction provides enough fuel economy benefit over a current firing fraction.
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