公开(公告)号：US20230115272A1

公开(公告)日：2023-04-13

申请号：US17860838

申请日：2022-07-08

Applicant: Tula Technology, Inc.

Inventor： Louis J. SERRANO ,  Elliott A. ORTIZ-SOTO ,  Shikui Kevin CHEN ,  Li-Chun CHIEN ,  Aditya MANDAL

IPC: F02D41/22 ,  F01L13/00 ,  F02D41/00 ,  G01M15/11 ,  G01M15/05 ,  G05B13/02

Abstract: A classifier capable of predicting if cylinder valves of an engine commanded to activate or deactivate failed to activate or deactivate respectively. In various embodiments, the classifier can be binary or multi-class Logistic Regression, or a Multi-Layer Perceptron (MLP) classifier. The variable displacement engine can operate in cooperation with a variable displacement engine using cylinder deactivation (CDA) or skip fire, including dynamic skip fire and/or multi-level skip fire.

公开(公告)号：US20220235718A1

公开(公告)日：2022-07-28

申请号：US17723581

申请日：2022-04-19

Applicant: Tula Technology, Inc. ,  Cummins, Inc.

Inventor： Benjamin Wolk ,  Justin Lee ,  Timothy Hayden Shipp

IPC: F02D41/00 ,  F02D41/30 ,  F02D41/40

Abstract: A variety of methods and arrangements are described for determining a pilot injection mass during skip fire operation of an internal combustion engine.

公开(公告)号：US20220228538A1

公开(公告)日：2022-07-21

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

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：US20220205399A1

公开(公告)日：2022-06-30

申请号：US17466888

申请日：2021-09-03

Applicant: Tula Technology, Inc.

Inventor： Louis Joseph Serrano ,  Vijay Srinivasan

IPC: F02D41/00 ,  F02D17/02

Abstract: Methods, systems, and devices for operating an internal combustion engine at a firing fraction that is less than a value of 1.0, wherein one or more cylinders of the internal combustion engine are not designated to be fired, determining a smoothing event time period where a particular one of the cylinders that have not been designated to be fired is either skipped or recharged, selecting a periodic disruptive waveform to approximate that is related to a skip or recharge event that is part of the smoothing event time period, determining a first harmonic sinusoid from a group of harmonic sinusoids that reduces the error between an approximated waveform and the disruptive waveform, determining a timeframe for utilizing the first harmonic, and actuating an additional motor to initiate a supplemental quantity of torque during the smoothing event time period based on the disruption quantity of torque.

公开(公告)号：US11359562B2

公开(公告)日：2022-06-14

申请号：US17463814

申请日：2021-09-01

Applicant: Tula Technology, Inc.

Inventor： Louis J. Serrano ,  Xin Yuan ,  John W. Parsels ,  Mohammad R. Pirjaberi ,  Mark A. Wilcutts ,  Masaki Nagashima

IPC: F02D41/00 ,  F02D41/14 ,  F02D41/30 ,  B60W30/20

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.

公开(公告)号：US11352966B2

公开(公告)日：2022-06-07

申请号：US17082981

申请日：2020-10-28

Applicant: Tula Technology, Inc.

Inventor： Steven E. Carlson ,  Xin Yuan ,  Siamak Hashemi ,  Vijay Srinivasan ,  Srihari Kalluri ,  Andrew W. Phillips ,  Mark A. Wilcutts ,  Louis J. Serrano ,  Shikui Kevin Chen

IPC: F02D41/00 ,  F01N11/00 ,  F02D13/06 ,  F01N9/00 ,  F02D41/12

Abstract: Controllers and methods for managing transitions into and/or out of a cylinder cut off mode are described. In some embodiments, a skip fire based transition into a cylinder cut off mode is used in which the fraction of working cycles that are fired is gradually reduced to a threshold firing fraction. Once the threshold firing fraction has been reached, all of the working chambers are deactivated.

公开(公告)号：US20220154657A1

公开(公告)日：2022-05-19

申请号：US16950632

申请日：2020-11-17

Applicant: Tula Technology, Inc. ,  Cummins, Inc.

Inventor： Vijay Srinivasan

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

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：US11280276B2

公开(公告)日：2022-03-22

申请号：US17192252

申请日：2021-03-04

Applicant: Tula Technology, Inc.

Inventor： Mohammad R. Pirjaberi ,  Adya S. Tripathi ,  Louis J. Serrano

IPC: F02D17/02 ,  F02D13/06 ,  F02D41/00 ,  F02D37/02 ,  F02D41/28

Abstract: Engine controllers and methods are described that facilitate skip fire control of an internal combustion engine. An engine controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. The engine controller selects an operational firing fraction from a set of available firing fractions. A firing controller then directs cylinder firings in a skip fire manner that delivers the selected operational firing fraction. The firing controller includes an accumulator that helps smooth transitions between different firing fractions.

公开(公告)号：US11236690B2

公开(公告)日：2022-02-01

申请号：US17332763

申请日：2021-05-27

Applicant: Tula Technology, Inc.

Inventor： Yongyan Cao ,  Elliott A. Ortiz-Soto ,  Louis J. Serrano

IPC: F02D17/02 ,  F02D41/00 ,  F02D41/24

Abstract: A variety of engine controllers and methods are described for controlling engines operating in a cylinder output level modulation mode. In one aspect transitions between different effective firing fractions are managed by gradually ramping an effective firing density. In another, when an engine transitions to a multi-level skip fire firing density that has more than one possible high/low/skip sequence, the phase of the high/low pattern is set relative to the phase of the firing pattern to ensure that a preferred high/low/skip sequence is generated. In another aspect, rapid large torque changes can be implemented in part by immediately changing the operational high/low fraction in response to a command to increase or reduce the desired engine torque.

公开(公告)号：US20220018296A1

公开(公告)日：2022-01-20

申请号：US17314309

申请日：2021-05-07

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Shikui Kevin CHEN ,  Louis J. SERRANO ,  Vijay SRINIVASAN ,  Elliott A. ORTIZ-SOTO ,  Matthew A. YOUNKINS

IPC: F02D41/00 ,  F02D41/06 ,  F01L9/16

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.