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公开(公告)号：US09983583B2
公开(公告)日：2018-05-29
申请号：US15672132
申请日：2017-08-08
Applicant: Tula Technology, Inc.
Inventor： Ram Subramanian , Louis J. Serrano , Matthew A. Younkins
CPC classification number: G05D1/0061 , B60W30/1882 , F02D11/105 , F02D17/02 , F02D29/02 , F02D41/0087 , F02D41/1402 , F02D2200/501 , F02D2250/18 , F02P5/1512
Abstract: The present invention relates generally to techniques for improving fuel efficiency of a vehicle powered by an internal combustion engine capable of operating at various displacement levels. An autonomous driving unit or cruise controller selects when possible an engine torque output that corresponds to a fuel efficient displacement level. The resultant vehicle speed profile and NVH level is acceptable to vehicle occupants.
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公开(公告)号：US09964051B2
公开(公告)日：2018-05-08
申请号：US15357398
申请日：2016-11-21
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Adya S. Tripathi , Louis J. Serrano
CPC classification number: F02D17/02 , F02D13/06 , F02D37/02 , F02D41/0087 , F02D2041/286 , F02D2200/101
Abstract: In various described embodiments skip fire control is used to deliver a desired engine output. A controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. In one aspect, the skip fire controller is arranged to select a base firing fraction that has a repeating firing cycle length that will repeat at least a designated number of times per second at the current engine speed. Such an arrangement can be helpful in reducing the occurrence of undesirable vibrations.
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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：US20180043893A1
公开(公告)日：2018-02-15
申请号：US15792175
申请日：2017-10-24
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Steven E. CARLSON
IPC: B60W30/188 , B60W10/06 , B60W10/02
CPC classification number: B60W30/1882 , B60W10/023 , B60W10/06 , B60W30/188 , B60W2710/025 , B60W2710/0677 , F02D17/02 , F02D37/02 , F02D41/0002 , F02D41/0087 , F02D41/0215 , F02D2041/001 , F02D2250/21 , F02P5/145 , F02P5/1504 , F02P9/002 , Y02T10/42
Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire or 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：US20170370804A1
公开(公告)日：2017-12-28
申请号：US15701155
申请日：2017-09-11
Applicant: Tula Technology Inc.
Inventor： Shikui Kevin CHEN , Masaki NAGASHIMA , Li-Chun CHIEN
CPC classification number: G01M15/11 , F02D35/024 , F02D41/0087 , F02D41/0097 , F02D41/22 , F02D2200/1012 , F02D2200/1015
Abstract: A variety of methods and arrangements for detecting misfire and other engine-related errors are described. In one aspect, a window is assigned to a target firing opportunity for a target working chamber. There is an attempt to fire a target working chamber during the target firing opportunity. A change in an engine parameter (e.g., crankshaft angular acceleration) is measured during the window. A model (e.g., a pressure model) is used to help determine an expected change in the engine parameter during the target firing opportunity. Based on a comparison of the expected change and the measured change in the engine parameter, a determination is made as to whether an engine error (e.g., misfire) has occurred.
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Patent Agency Ranking
公开(公告)号：US20170369063A1
公开(公告)日：2017-12-28
申请号：US15288847
申请日：2016-10-07
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Steven E. CARLSON
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, 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 i 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：US09784644B2
公开(公告)日：2017-10-10
申请号：US14880652
申请日：2015-10-12
Applicant: Tula Technology Inc.
Inventor： Shikui Kevin Chen , Masaki Nagashima , Li-Chun Chien
CPC classification number: G01M15/11 , F02D35/024 , F02D41/0087 , F02D41/0097 , F02D41/22 , F02D2200/1012 , F02D2200/1015
Abstract: A variety of methods and arrangements for detecting misfire and other engine-related errors are described. In one aspect, a window is assigned to a target firing opportunity for a target working chamber. There is an attempt to fire a target working chamber during the target firing opportunity. A change in an engine parameter (e.g., crankshaft angular acceleration) is measured during the window. A model (e.g., a pressure model) is used to help determine an expected change in the engine parameter during the target firing opportunity. Based on a comparison of the expected change and the measured change in the engine parameter, a determination is made as to whether an engine error (e.g., misfire) has occurred.
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公开(公告)号：US09745905B2
公开(公告)日：2017-08-29
申请号：US14857371
申请日：2015-09-17
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Louis J. Serrano , Xin Yuan , Steven E. Carlson , Siamak Hashemi , Ryan A. Kuhlenbeck
CPC classification number: F02D37/02 , F02D17/02 , F02D41/0002 , F02D41/0087 , F02D2041/286 , F02D2200/0406 , F02D2200/101 , F02P5/1504 , Y02T10/42 , Y02T10/46
Abstract: Methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help smooth the transitions. Generally, firing fractions transitions are implemented gradually, preferably in a manner that relatively closely tracks manifold filling dynamics. In some embodiments, the commanded firing fraction is altered each firing opportunity. Another approach contemplates altering the commanded firing fraction by substantially the same amount each firing opportunity for at least a portion of the transition. These approaches work particularly well when the commanded firing fraction is provided to a skip fire controller that includes an accumulator functionality that tracks the portion of a firing that has been requested, but not delivered, or vice versa. In various embodiments, commanded firing fraction changes are delayed relative to initiation of the change in throttle position to help compensate for inherent delays associated with changing the manifold air pressure.
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公开(公告)号：US20170218866A1
公开(公告)日：2017-08-03
申请号：US15487127
申请日：2017-04-13
Applicant: Tula Technology, Inc.
Inventor： Mark A. SHOST , Matthew A. YOUNKINS
CPC classification number: F02D41/0082 , F01L1/146 , F01L1/185 , F01L1/34 , F01L13/0005 , F01L13/0026 , F01L2013/001 , F01L2013/0068 , F01L2013/0073 , F01L2013/103 , F01L2105/00 , F01L2800/08 , F01L2820/01 , F02B75/20 , F02B2075/1816 , F02D13/06 , F02D17/02 , F02D41/0002 , F02D41/0087 , F02D2041/0012 , Y02T10/18 , Y02T10/42
Abstract: Internal combustion engine having cam actuated valves that can be controlled to facilitate the use of different air charge levels in different cylinders or sets of cylinders are described. In one aspect a first set of cylinders is operated in a skip fire manner in which the corresponding cylinders are deactivated during skipped working cycles. Cam actuated intake valves associated with a second set of cylinders are operated differently so that the air charge in the cylinders in the second set is different than the air charge in fired cylinders subject to the skip fire control. According to another aspect, an engine having cam actuated intake valves is operated in a dynamic firing level modulation mode. During the dynamic firing level modulation operation, the cam actuated intake valves are controlled in at least two different manners to such that different cylinder working cycles have different air charges.
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公开(公告)号：US09689328B2
公开(公告)日：2017-06-27
申请号：US15274029
申请日：2016-09-23
Applicant: Tula Technology, Inc.
Inventor： Matthew A. Younkins , Louis J. Serrano
IPC: F02D41/00 , F02D41/04 , F02D13/06 , F02D13/02 , F02D17/02 , F02D41/10 , F02D41/12 , F02P5/145 , F01L1/047 , F02D41/26 , F02P5/15
CPC classification number: F02D41/0087 , F01L1/047 , F02D11/02 , F02D13/0223 , F02D13/0273 , F02D13/06 , F02D17/02 , F02D41/0002 , F02D41/008 , F02D41/04 , F02D41/107 , F02D41/123 , F02D41/26 , F02D2041/001 , F02D2041/0012 , F02D2250/18 , F02P5/145 , F02P5/1502 , Y02T10/142 , Y02T10/42
Abstract: In one aspect, a method for controlling operation of an internal combustion engine is described. The engine is operated in a skip fire manner such that selected skipped working cycles are skipped and selected active working cycles are fired to deliver a desired engine output. A particular level of torque output is selected for each of the fired working chambers. Various methods, arrangements and systems related to the above method are also described.
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