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.

公开(公告)号：US20220128011A1

公开(公告)日：2022-04-28

申请号：US17569308

申请日：2022-01-05

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Elliott A. ORTIZ-SOTO ,  Shahaboddin OWLIA

IPC: F02D41/00 ,  F02B37/24 ,  F02D41/14 ,  F02D41/18

Abstract: Engine controllers and control schemes are provided for managing engine state transitions requiring increased compressor pressure ratios in turbocharged engines. In some circumstances, turbo lag can be mitigated by initially transitioning the engine to an intermediate engine state that directly or indirectly increases airflow through the engine and turbocharger relative to what would be possible if the engine were immediately commanded to operate at the target engine state. After reaching a point where the desired torque is actually generated at the intermediate engine state, the operational settings are gradually reduced to the target effective firing density while increasing the operational compressor pressure ratio to the target compressor ratio.

公开(公告)号：US20220252017A1

公开(公告)日：2022-08-11

申请号：US17725125

申请日：2022-04-20

Applicant: Tula Technology, 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.

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：US20210404397A1

公开(公告)日：2021-12-30

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: F02D41/00 ,  F02D41/24 ,  F02D17/02

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.