-
公开(公告)号：US20190003443A1
公开(公告)日：2019-01-03
申请号：US16022017
申请日：2018-06-28
Applicant: Tula Technology, Inc.
Inventor： Elliot A. ORTIZ-SOTO , Matthew A. YOUNKINS
Abstract: Methods, devices, controllers, and algorithms are described for operating an internal combustion engine wherein at least some firing opportunities utilize low temperature gasoline combustion (LTGC). Other firing opportunities may be skipped or utilize some other type of combustion, such as spark ignition. The nature of any particular firing opportunity is dynamically determined during engine operation, often on a firing opportunity by firing opportunity basis. Firings that utilize LTGC produce little, if any, nitrous oxides in the exhaust stream and thus, in some implementations, may require no aftertreatment system to remove them from the exhaust stream.
-
公开(公告)号：US10138860B2
公开(公告)日：2018-11-27
申请号：US15697639
申请日：2017-09-07
Applicant: Tula Technology, Inc.
Inventor： Masaki Nagashima , Mohammad R. Pirjaberi , Louis J. Serrano
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.
-
233.发明申请公开(公告)号：US20180328292A1
公开(公告)日：2018-11-15
申请号：US16035273
申请日：2018-07-13
Applicant: Tula Technology, Inc.
Inventor： Vijay SRINIVASAN , Louis J. SERRANO , Siamak HASHEMI , Robert S. BAILEY , Geoffrey ROUTLEDGE
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.
-
公开(公告)号：US10100754B2
公开(公告)日：2018-10-16
申请号：US15681601
申请日：2017-08-21
Applicant: Tula Technology, Inc.
Inventor： Vijay Srinivasan
IPC: F02P5/145 , F02D17/02 , F02D41/00 , F02D41/02 , F02D41/04 , F02D41/14 , F02D41/24 , F02P5/15 , F02P9/00
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.
-
公开(公告)号：US20180216551A1
公开(公告)日：2018-08-02
申请号：US15939074
申请日：2018-03-28
Applicant: Tula Technology, Inc.
Inventor： Adya S. TRIPATHI
CPC classification number: F02D41/0087 , F02B75/02 , F02B2075/027 , F02D13/06 , F02D17/02 , F02D37/02 , F02D41/1401 , F02D41/26 , F02D41/266 , F02D41/30 , F02D2200/0614 , F02D2200/602 , F02D2250/18 , F02D2400/02 , F02P5/045 , F02P5/1512 , Y02T10/46
Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines based on skip fire operation of the engine are described. In one aspect the skip fire decisions are made on a working cycle by working cycle basis. During selected skipped working cycles, the corresponding cylinders are deactivated such that air is not pumped through the cylinder during the selected skipped working cycles. In some implementations, the cylinders are deactivated by holding associated intake and exhaust valves closed such that an air charge is not present in the working chamber during the selected skipped working cycles.
-
Patent Agency Ranking
公开(公告)号：US20180179970A1
公开(公告)日：2018-06-28
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
CPC classification number: F02D41/0087 , B60W10/023 , B60W10/06 , B60W30/1886 , B60W2710/025 , F02D17/026 , F02D37/02 , F02D41/0215 , F02D2041/001 , F02D2250/21 , F02P5/1504
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.
-
公开(公告)号：US20180112644A1
公开(公告)日：2018-04-26
申请号：US15830388
申请日：2017-12-04
Applicant: Tula Technology, Inc.
Inventor： Louis J. Serrano
IPC: F02P5/15
CPC classification number: F02P5/1502 , F02D13/06 , F02D17/00 , F02D17/02 , F02D41/0085 , F02D41/0087 , F02D41/3058 , F02D2041/0012 , F02D2041/286 , F02D2250/18 , F02D2250/21 , F02P9/002
Abstract: Methods and controllers for dynamically altering the phase of a firing sequence during operation of an engine are described. The described methods and controllers are particularly useful in conjunction with cylinder output level modulation operation of an engine such as dynamic skip fire operation of the engine and/or multi-charge level operation of the engine.
-
公开(公告)号：US20170370310A1
公开(公告)日：2017-12-28
申请号：US15628309
申请日：2017-06-20
Applicant: Tula Technology, Inc.
Inventor： Allan J. KOTWICKI , Joel D. VAN ESS , Mark A. WILCUTTS
CPC classification number: F02D41/0087 , F02D13/06 , F02D17/02 , F02D41/1401 , F02D41/1402 , F02D41/182 , F02D2041/1436 , F02D2200/0402 , F02D2200/0408 , F02P5/1512 , Y02T10/18
Abstract: Methods, devices, estimators, controllers and algorithms are described for estimating working chamber air charge during engine operations. The described approaches and devices are well suited for use in dynamic firing level modulation controlled engines. Manifold pressure is estimated for a time corresponding to an induction event associated with a selected working cycle. The manifold pressure estimate accounts for impacts from one or more intervening potential induction events that will occur between the time that the manifold pressure is estimated and the time that the induction event associated with the selected working cycle occurs. The estimated manifold pressure is used in the estimation of the air charge for the selected working cycle. The described approach may be used to individually calculate the air charge for each induction event at any time that the engine is operating in a mode that can benefit from the individual cylinder air charge estimations.
-
公开(公告)号：US20170370308A1
公开(公告)日：2017-12-28
申请号：US15282308
申请日：2016-09-30
Applicant: Tula Technology, Inc. , Delphi Technologies Inc.
Inventor： Siamak HASHEMI , Matthew A. YOUNKINS , John E. KIRWAN
CPC classification number: F02D41/0087 , F02B33/00 , F02B37/00 , F02D11/105 , F02D13/06 , F02D41/0002 , F02D41/0047 , F02D41/064 , F02D41/1446 , F02D41/1497 , F02D2041/0012 , F02D2041/3052 , F02D2200/08 , F02D2200/602 , F02D2250/18 , Y02T10/144 , Y02T10/18 , Y02T10/42 , Y02T10/47
Abstract: A gasoline compression ignition engine is operated in two modes. In a one mode of operation the engine is operated with a firing fraction of one, corresponding to all of the cylinders being active, working cylinders. In a second skip fire mode of operation a firing fraction of less than one may be used under conditions, such as a low load condition, to improve efficiency. The skip fire mode of operation may also be selected in part based on other considerations, such as maintaining an exhaust temperature conducive for efficient catalytic converter operation or limiting cylinder output variability.
-
公开(公告)号：US20170342920A1
公开(公告)日：2017-11-30
申请号：US15679419
申请日：2017-08-17
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. PIRJABERI , Kian EISAZADEH-FAR , Steven E. CARLSON , Ying REN , Joel D. VAN ESS
CPC classification number: F02D41/0087 , B60W20/00 , F02D41/0002 , F02D41/1498 , F02D41/3058 , F02D41/307 , F02D2041/0012 , F02D2200/0406 , F02D2250/28 , Y02T10/42
Abstract: Methods, devices, estimators, controllers and algorithms are described for estimating the torque profile of an engine and/or for controlling torque applied to a powertrain by one or more devices other than the engine itself to manage the net torque applied by the engine and other device(s) in manners that reduce undesirable NVH. The described approaches are particularly well suitable for use in hybrid vehicles in which the engine is operated in a skip fire or other dynamic firing level modulation manner—however they may be used in a variety of other circumstances as well. In some embodiments, the hybrid vehicle includes a motor/generator that applies the smoothing torque.
-
-
-
-
-
-
-
-
-
Search Results
342
records
(took 0.04 seconds)
