公开(公告)号：US11624335B2

公开(公告)日：2023-04-11

申请号：US17569722

申请日：2022-01-06

Applicant: Tula Technology, Inc.

Inventor： Robert C. Wang ,  Louis J. Serrano ,  Shikui Kevin Chen

IPC: F02D41/22 ,  F02D41/00 ,  F02D13/06 ,  F02D13/02

Abstract: A method of operating an engine is provided. An exhaust valve actuation fault is detected for a first exhaust valve associated with a first cylinder during a first working cycle. In response to the detection of the exhaust valve actuation fault, fueling to at least the first cylinder is cut off. Actuation of the first exhaust valve is attempted in second working cycles that follow the first working cycle, wherein the second working cycles are not fueled. Whether or not the first exhaust valve actuated properly during the second working cycles is determined. Operation of the first cylinder is resumed when it is determined that the first exhaust valve actuated properly. Operation of the first cylinder is not resumed when it is determined that the first exhaust valve did not actuate properly.

公开(公告)号：US11619187B2

公开(公告)日：2023-04-04

申请号：US17714880

申请日：2022-04-06

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Louis J. Serrano ,  Xiaoping Cai ,  Shikui Kevin Chen ,  Benjamin M. Wolk ,  Avra Brahma ,  Justin R. Lee

IPC: F02D41/00 ,  F02D17/02 ,  F02D37/02 ,  F02D13/06

Abstract: A system and method for transitioning a firing fraction of a variable displacement internal combustion engine when generating a desired torque output. During and following the transition to the second firing fraction, a combustion recipe is ascertained and used operating the cylinders of the variable displacement internal combustion engine to generate the desired torque output. The recipe is preferably optimized for the engine operating at the second firing fraction, at least relative to the previous charge of the previous combustion recipe used with the first firing fraction.

公开(公告)号：US11560822B2

公开(公告)日：2023-01-24

申请号：US17002509

申请日：2020-08-25

Applicant: Tula Technology, Inc.

Inventor： Shahaboddin Owlia

IPC: F01N9/00 ,  F02D13/06 ,  F02D41/02 ,  F01N3/021

Abstract: Methods, systems, and devices for particulate filter soot management for internal combustion engines are described herein. A method for particulate filter soot management for internal combustion engines includes determining a quantity of soot on a particulate filter and adjusting a skip fire firing sequence based at least in part on maintaining the quantity of soot on the particulate filter within a desired soot quantity range.

公开(公告)号：US20220349357A1

公开(公告)日：2022-11-03

申请号：US17867797

申请日：2022-07-19

Applicant: Tula Technology, Inc.

Inventor： Louis Joseph Serrano ,  Vijay Srinivasan

IPC: F02D41/00 ,  F02D17/02

Abstract: Methods, systems, and devices for operating an engine controller in a vehicle for managing motor torque smoothing. One controller is configured to select a periodic disruptive waveform generated over a period of time to approximate that is associated with the vehicle being at idle, determine a first harmonic sinusoid from a group of harmonic sinusoids that reduces the error between an approximated waveform and the disruptive waveform, and initiate a supplemental quantity of torque during the period of time based on the disruption quantity of torque.

公开(公告)号：US11486321B2

公开(公告)日：2022-11-01

申请号：US17390223

申请日：2021-07-30

Applicant: Cummins Inc. ,  Tula Technology, Inc.

Inventor： Aaron William Beinborn ,  J. Steven Kolhouse

IPC: F02D41/14 ,  F02D41/00 ,  F02D13/06

Abstract: A controller for a vehicle includes at least one processor and at least one memory storing instructions that, when executed by the processor, cause the controller to perform various operations. The operations include determining that the vehicle is in reverse and in response, deactivating a cylinder of an engine of the vehicle.

公开(公告)号：US20220341819A1

公开(公告)日：2022-10-27

申请号：US17862143

申请日：2022-07-11

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Shikui Kevin CHEN

IPC: G01M15/10 ,  F02D17/02

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.

公开(公告)号：US11441519B2

公开(公告)日：2022-09-13

申请号：US17110917

申请日：2020-12-03

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Xin Yuan ,  Shikui Kevin Chen ,  Jennifer K. Light-Holets ,  Scott R. Bardakjy

IPC: F02M26/43 ,  F02D41/00 ,  F02M26/05

Abstract: A system and method of integrating an engine having dynamic skip fire control with an exhaust gas recirculation system in a turbocharged internal combustion engine is described. An engine control system determines an appropriate firing pattern based at least in part on a desired exhaust gas recirculation flow rate. Signals from sensors in the intake manifold and exhaust system may also be used as part of a feedback loop to determine a desired exhaust gas recirculation flow rate.

公开(公告)号：US20220268227A1

公开(公告)日：2022-08-25

申请号：US17742070

申请日：2022-05-11

Applicant: Tula Technology, Inc.

Inventor： Vijay Srinivasan

IPC: F02D41/00 ,  F02D13/06 ,  F02D17/02 ,  F02D41/30 ,  F02D41/40

Abstract: A variety of methods and arrangements are described for managing transitions between operational states of an internal combustion engine during skip fire operation of the engine.

公开(公告)号：US11326532B1

公开(公告)日：2022-05-10

申请号：US17412668

申请日：2021-08-26

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Louis J. Serrano ,  Xiaoping Cai ,  Shikui Kevin Chen ,  Benjamin M. Wolk ,  Avra Brahma ,  Justin R. Lee

IPC: F02D41/00 ,  F02D17/02 ,  F02D37/02 ,  F02D13/06

Abstract: A system and method for transitioning a firing fraction of a variable displacement internal combustion engine when generating a desired torque output. During and following the transition to the second firing fraction, a combustion recipe is ascertained and used operating the cylinders of the variable displacement internal combustion engine to generate the desired torque output. The recipe is preferably optimized for the engine operating at the second firing fraction, at least relative to the previous charge of the previous combustion recipe used with the first firing fraction.

公开(公告)号：US20220120230A1

公开(公告)日：2022-04-21

申请号：US17075072

申请日：2020-10-20

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Mark A. WILCUTTS ,  Xi LUO ,  Anastasios ARVANITIS

IPC: F02D41/00 ,  F01N3/021 ,  F01M1/02 ,  B60W10/08 ,  F01N3/10 ,  F02D41/02 ,  F02D41/14 ,  B60W30/20 ,  F02D41/06 ,  B60W10/06 ,  F01N3/20 ,  F02B67/06 ,  F02D13/02 ,  F02D41/40 ,  F01M5/00

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.