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公开(公告)号：US20220112827A1
公开(公告)日：2022-04-14
申请号：US17561468
申请日：2021-12-23
Applicant: Tula Technology, Inc.
Inventor： Matthew A. YOUNKINS , Shikui Kevin CHEN
Abstract: System and methods are described for optimizing exhaust flow rate and temperature during specified operational periods warm-up and keep-warm conditions, by minimizing or maximizing heat flux during those specified operational periods.
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公开(公告)号：US20220065182A1
公开(公告)日：2022-03-03
申请号：US17373247
申请日：2021-07-12
Applicant: Tula Technology, Inc. , Cummins, Inc.
Inventor： Louis Joe Serrano , Xiaoping Cai , Yongyan Cao , Vijay Srinivasan , Kevin Shikui Chen , Andrea Marie Evans , Avra Brahma
Abstract: A variety of methods and arrangements are described for managing recharging of cylinders of an internal combustion engine during skip fire operation of the engine. In one method, a maximum allowed deactivation time for a cylinder is determined and the cylinder is recharged before the maximum allowed deactivation time is exceeded.
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63.发明申请公开(公告)号：US20210404912A1
公开(公告)日：2021-12-30
申请号：US17469357
申请日：2021-09-08
Applicant: Tula Technology, Inc. , Cummins Inc.
Inventor： Shikui Kevin CHEN
Abstract: A diagnostic system and method that (a) that uses models indicative of both successful firing and skips to determine if cylinders of a skip fire controlled internal combustion engine have successfully fired or successfully skipped and (b) uses filtered exhaust gas pressure readings for detecting faults associated with EGR systems and/or turbocharger systems.
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公开(公告)号：US20210404364A1
公开(公告)日：2021-12-30
申请号：US17459776
申请日：2021-08-27
Applicant: Tula Technology, Inc.
Inventor： Matthew A. YOUNKINS , Shikui Kevin CHEN
Abstract: System and methods are described for optimizing exhaust flow rate and temperature during specified operational periods warm-up and keep-warm conditions, by minimizing or maximizing heat flux during those specified operational periods.
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公开(公告)号：US20210301703A1
公开(公告)日：2021-09-30
申请号：US17347083
申请日：2021-06-14
Applicant: Tula Technology, Inc.
Inventor： Matthew A. Younkins , Shikui Kevin Chen , Mark A. Wilcutts
Abstract: A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. The aftertreatment monitor obtains data relating to a temperature of one or more aftertreatment elements, such as 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 such that the temperature of the aftertreatment element is controlled within its effective operating range.
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Patent Agency Ranking
公开(公告)号：US11060430B2
公开(公告)日：2021-07-13
申请号：US16654373
申请日：2019-10-16
Applicant: Tula Technology, Inc.
Inventor： Matthew A. Younkins , Shikui Kevin Chen , Mark A. Wilcutts
Abstract: A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. The aftertreatment monitor obtains data relating to a temperature of one or more aftertreatment elements, such as 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 such that the temperature of the aftertreatment element is controlled within its effective operating range.
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公开(公告)号：US11053828B2
公开(公告)日：2021-07-06
申请号：US16576972
申请日：2019-09-20
Applicant: Tula Technology, Inc.
Inventor： Shikui Kevin Chen , Matthew A. Younkins , Louis J. Serrano
Abstract: A skip fire engine controller and method of control is described wherein during transitions from a first firing density to a second firing density, a firing density and a pumping density are separately set so as to balance the conflicting demands of (a) torque control, (b) Noise, Vibration and Harshness (NVH), (c) air flow through the engine and (d) air-fuel ratio.
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公开(公告)号：US10982617B2
公开(公告)日：2021-04-20
申请号：US16552052
申请日：2019-08-27
Applicant: Tula Technology, Inc.
Inventor： Xi Luo , Jerry F. Fuschetto , Xin Yuan , Matthew A. Younkins
Abstract: A vehicle, engine controller and method for coordinating direct split injection of two or more pulses of fuel during a working cycle of a reactivated cylinder which was deactivated in a previous working cycle is described. By using split injection for the reactivated cylinder, the particulate matter and particulate number (“PM/PN”) generated by the reactivated cylinder is reduced.
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公开(公告)号：US10954877B2
公开(公告)日：2021-03-23
申请号：US16749607
申请日：2020-01-22
Applicant: Tula Technology, Inc.
Inventor： Masaki Nagashima , Mohammad R. Pirjaberi , Louis J. Serrano , Xin Yuan , John W. Parsels , Mark A. Wilcutts
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 dynamic firing level modulation manner. A smoothing torque is determined by adaptive control 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 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：US10941722B2
公开(公告)日：2021-03-09
申请号：US16270349
申请日：2019-02-07
Applicant: Tula Technology Inc. , GM Global Technology Operations LLC
Inventor： Mark A. Shost , Louis J. Serrano , Steven E. Carlson , Vijay Srinivasan , Eric J. Defenderfer , Nitish J. Wagh , Randall S. Beikmann , Jinbiao Li , Xin Yuan , Li-Chun Chien
Abstract: In one aspect, a skip fire engine controller is described. The skip fire engine controller includes a skip fire module arranged to determine an operational firing fraction and associated cylinder load for delivering a desired engine output. The skip fire engine controller also includes a firing controller arranged to direct firings in a skip fire manner that delivers the selected operational firing fraction. Various methods, modules, lookup tables and arrangements related to the selection of a suitable operational firing fraction are also described.
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