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公开(公告)号：US11352967B2
公开(公告)日：2022-06-07
申请号：US17314309
申请日：2021-05-07
Applicant: Tula Technology, Inc.
Inventor： Shikui Kevin Chen , Louis J. Serrano , Vijay Srinivasan , Elliott A. Ortiz-Soto , Matthew A. Younkins
Abstract: A system and method for controlling an internal combustion engine involving (1) cylinder trapping strategies where one of several pneumatic spring types are dynamically selected for cylinders based at least partially on a predicted number of upcoming skips for each of the cylinders respectively and/or (2) staggering various valvetrain dependent operational engine strategies as operating conditions permit as the internal combustion engine warms up following a cold start.
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公开(公告)号：US11260844B2
公开(公告)日：2022-03-01
申请号：US17029560
申请日：2020-09-23
Applicant: Tula Technology, Inc.
Inventor： Andrew W. Phillips , Louis J. Serrano , Xiaoping Cai
Abstract: Methods and controllers for coordinating firing fraction transitions that occur in conjunction with transmission shifts are described. In one aspect, an engine controller transmits a do-not-shift instruction to a transmission controller based at least in part on a determination that a particular type of firing fraction transition is desired. The firing fraction transition is then implemented using a skip fire transition protocol. In this manner, the transmission is affirmatively prevented from shifting during the firing fraction transition. The described approaches are well suited for use in connection with transitions to DCCO or DFCO operation.
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公开(公告)号：US11136928B2
公开(公告)日：2021-10-05
申请号：US17064354
申请日：2020-10-06
Applicant: Tula Technology, Inc.
Inventor： Louis J. Serrano , Xin Yuan , John W. Parsels , Mohammad R. Pirjaberi , Mark A. Wilcutts , Masaki Nagashima
Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.
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公开(公告)号：US10519876B2
公开(公告)日：2019-12-31
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
Abstract: Methods and controllers are described that facilitate the determination of an operational skip fire firing fraction for an engine based at least in part noise levels and/or vehicle vibration levels that are not induced by engine operation. In some embodiments, the firing fraction is determined based at least in part of noise or vibrations associated with road roughness and/or cabin noise levels.
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公开(公告)号：US10436133B2
公开(公告)日：2019-10-08
申请号：US16038622
申请日：2018-07-18
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Kian Eisazadeh-Far , Steven E. Carlson , Louis J. Serrano
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.
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Patent Agency Ranking
公开(公告)号：US10393085B2
公开(公告)日：2019-08-27
申请号：US15830388
申请日：2017-12-04
Applicant: Tula Technology, Inc.
Inventor： Louis J. Serrano
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.
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公开(公告)号：US10221786B2
公开(公告)日：2019-03-05
申请号：US15340291
申请日：2016-11-01
Applicant: Tula Technology, Inc.
Inventor： Louis J. Serrano , Xin Yuan , John W. Parsels , Mohammad R. Pirjaberi , Mark A. Wilcutts , Masaki Nagashima
Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.
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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.
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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.
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公开(公告)号：US09777658B2
公开(公告)日：2017-10-03
申请号：US15147690
申请日：2016-05-05
Applicant: Tula Technology, Inc.
Inventor： Masaki Nagashima , Mohammad R. Pirjaberi , Louis J. Serrano
CPC classification number: F02D41/1401 , F02D41/0002 , F02D41/0087 , F02D41/04 , F02D41/18 , F02D2041/001 , F02D2041/141 , F02D2200/0406 , F02D2200/1004 , F02D2250/21 , Y02T10/42
Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire 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 firing fractions during transitions such that the resulting changes in the firing fraction better track cylinder air charge changing dynamics associated with the transition.
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