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311.发明申请公开(公告)号：US20180106201A1
公开(公告)日：2018-04-19
申请号：US15847481
申请日：2017-12-19
Applicant: Tula Technology, Inc.
Inventor： Xin Yuan , Louis J. Serrano
CPC classification number: F02D41/0005 , F01N9/00 , F01N11/007 , F01N2430/02 , F01N2430/08 , F01N2900/0412 , F01N2900/08 , F02D13/06 , F02D41/0087 , F02D41/12 , F02D2041/0012 , F02D2200/0406 , F02D2200/602 , Y02T10/42 , Y02T10/47
Abstract: Methods and arrangements for transitioning an engine between a deceleration cylinder cutoff (DCCO) state and an operational state are described. In one aspect, transitions from DCCO may begin with reactivating cylinders to pump air to reduce the pressure in the intake manifold prior to firing any cylinders. The number of pumping cycles, if any, is based on intake manifold absolute pressure (MAP).
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公开(公告)号：US20180046184A1
公开(公告)日：2018-02-15
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：US09878718B2
公开(公告)日：2018-01-30
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：US20170370342A1
公开(公告)日：2017-12-28
申请号：US15697639
申请日：2017-09-07
Applicant: Tula Technology, Inc.
Inventor： Masaki NAGASHIMA , Mohammad R. PIRJABERI , Louis J. SERRANO
CPC classification number: F02P5/145 , F02D11/105 , F02D13/02 , F02D17/02 , F02D37/02 , F02D41/0002 , F02D41/0087 , F02D2041/001 , F02D2041/141 , F02D2041/1431 , F02D2200/0406 , F02D2200/1004 , F02D2250/21 , Y02T10/42
Abstract: A variety of methods and arrangements are described for controlling transitions between effective firing fractions during dynamic firing level modulation operation of an engine in order to help reduce undesirable NVH consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the effective firing fractions during transitions such that the resulting changes in the effective firing fraction better track cylinder air charge changing dynamics associated with the transition.
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315.发明申请公开(公告)号：US20170370301A1
公开(公告)日：2017-12-28
申请号：US15681601
申请日：2017-08-21
Applicant: Tula Technology, Inc.
Inventor： Vijay SRINIVASAN
CPC classification number: F02D17/02 , F02D41/0087 , F02D41/021 , F02D41/0225 , F02D41/047 , F02D41/1406 , F02D41/2422 , F02D2200/021 , F02D2200/025 , F02D2200/101 , F02D2200/501 , F02D2200/702 , F02D2250/18 , F02P5/1512 , F02P9/002
Abstract: A system and method for dynamically varying an amount slippage of a Torque Converter Clutch (TCC) provided between an engine and a transmission of a vehicle in response to non-powertrain factors. By varying a slippage output signal, the amount of TCC slippage between the engine and the transmission can be adjusted. Small amounts of slippage, relative to large amounts of slippage, provide (a) improved vehicle fuel economy, but (b) induce more powertrain noise and vibration in the vehicle cabin. By dynamically adjusting the slippage, a tradeoff between improved fuel economy vs. a satisfying driver experience can be realized.
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Patent Agency Ranking
公开(公告)号：US20170350331A1
公开(公告)日：2017-12-07
申请号：US15171931
申请日：2016-06-02
Applicant: Tula Technology, Inc. , FCA US LLC
Inventor： Mark A. SHOST , Ihab S. SOLIMAN , James J. DALEY
CPC classification number: F02D41/0085 , F02D13/06 , F02D17/00 , F02D17/02 , F02D29/02 , F02D41/008 , F02D41/0087 , F02D41/26 , F02D2041/0012 , F02D2200/1004
Abstract: In one aspect, a method is described. An operational engine torque is calculated. The engine is operated in a skip fire manner to deliver the operational engine torque. A reference engine torque is calculated using a torque model. The torque model involves estimating torque at a working chamber level. The reference engine torque is compared to the calculated operational engine torque to assess the accuracy of the operational engine torque calculation. Various embodiments of the present invention involve software, devices, systems and engine controllers that are related to one or more of the above operations.
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公开(公告)号：US09835522B2
公开(公告)日：2017-12-05
申请号：US14919385
申请日：2015-10-21
Applicant: Tula Technology Inc.
Inventor： Shikui Kevin Chen , Allan J. Kotwicki , Joel D. Van Ess , Robert S. Bailey , Mohammad R. Pirjaberi
CPC classification number: G01M15/05 , F02M35/1038 , G01M15/09
Abstract: A variety of methods and arrangements for detecting failure of the commanded air induction in an internal combustion engine are described. In some embodiments, the intake manifold pressure is monitored. An air induction event generates a fluctuation in the intake manifold pressure, which is recorded. The signal is processed through a diagnostic filter to help determine whether the actual induction matched the commanded induction. In other embodiments, measured crankshaft acceleration is compared with estimated crankshaft acceleration. If the two quantities differ by a threshold amount an induction fault is detected. The two detection methods may also be combined. The describe approaches are particularly well suited for use in engines operating in a skip fire mode with cylinder deactivation and/or a dynamic firing level modulation mode.
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公开(公告)号：US20170321617A1
公开(公告)日：2017-11-09
申请号：US15490092
申请日：2017-04-18
Applicant: Tula Technology, Inc.
Inventor： Srihari KALLURI , Steven E. CARLSON
CPC classification number: F02D41/0087 , F01N3/101 , F01N9/00 , F01N13/082 , F01N13/10 , F01N2410/00 , F01N2410/10 , F01N2900/08 , F02D15/00 , F02D41/0055 , F02D41/123 , F02D41/3058 , F02M26/13 , F02M26/15 , Y02T10/47
Abstract: Various methods and arrangements for improving fuel economy in decel fuel cut-off (DFCO) operation of an internal combustion engine are described. In one aspect, a catalytic converter bypass valve diverts the pumped air in DFCO mode from flowing through a catalytic converter. The diverted, pumped air may flow through a bypass line or be returned to the engine intake manifold through an exhaust gas recirculation return line. Another aspect of the invention relates to directing the diverted pumped air through an emission control device.
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公开(公告)号：US09726094B2
公开(公告)日：2017-08-08
申请号：US14548138
申请日：2014-11-19
Applicant: Tula Technology Inc.
Inventor： Matthew A. Younkins , Ram Subramanian , Leo Breton
IPC: F02D43/00 , F02D41/04 , F01N3/20 , F01N11/00 , F02D41/00 , F02D41/06 , F02D41/14 , F02D41/26 , F02D41/02
CPC classification number: F02D41/0087 , F02D41/025 , F02D41/0255 , F02D41/06 , F02D41/1446 , F02D41/1454 , F02D41/263 , F02D2041/0265 , F02D2200/0802 , F02D2200/0804 , Y02T10/26
Abstract: Various methods and arrangements for controlling catalytic converter temperature are described. In one aspect, an engine controller includes a catalytic monitor and a firing timing determination unit. The catalytic monitor obtains data relating to a temperature of a catalytic converter. Based at least partly on this data, the firing timing determination unit generates a firing sequence for operating the engine in a skip fire manner. Another aspect of the invention relates to an engine exhaust system that can help expedite the heating of a catalytic converter.
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公开(公告)号：US09725082B2
公开(公告)日：2017-08-08
申请号：US14743656
申请日：2015-06-18
Applicant: Tula Technology Inc. , FCA US LLC
Inventor： Ihab S. Soliman , Mark A. Shost , Truc Trung Le , Joseph B. Adams
IPC: F02P5/00 , B60W20/00 , F02D17/02 , B60W10/06 , F02D29/02 , F02D41/30 , F02N11/08 , F02P5/15 , F02N11/04
CPC classification number: B60W20/00 , B60W10/06 , F02D17/02 , F02D29/02 , F02D41/3058 , F02D2200/0406 , F02N11/04 , F02N11/0829 , F02N2011/0896 , F02N2200/022 , F02P5/1506 , Y02T10/46 , Y02T10/48 , Y10S903/905
Abstract: A variety of methods and arrangements for implementing a start/stop feature in a skip fire engine control system are described. In one aspect, the implementation of the start/stop feature involves automatically turning off an internal combustion engine under selected circumstances during a drive cycle. A determination is made that the engine should be restarted. During the engine startup period, the engine is operated in a skip fire manner such that a desired engine speed is reached.
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