公开(公告)号：US11492987B2

公开(公告)日：2022-11-08

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: F02D41/06 ,  F02D41/00 ,  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：US11434839B2

公开(公告)日：2022-09-06

申请号：US17137955

申请日：2020-12-30

Applicant: Tula Technology, Inc.

Inventor： Shikui Kevin Chen ,  Aditya Mandal ,  Louis J. Serrano ,  Xiaoping Cai

IPC: F02D41/00 ,  F02D17/02 ,  F02D41/14 ,  F02D41/22 ,  G06N20/00 ,  G06N5/04 ,  F01N13/10

Abstract: A system and method for the use of machine learning for detecting faults for cylinder intake and/or exhaust valves that do not properly open or close as commanded and for generating a flag for such faults.

公开(公告)号：US11428133B2

公开(公告)日：2022-08-30

申请号：US17330062

申请日：2021-05-25

Applicant: Cummins Inc. ,  Tula Technology, Inc.

Inventor： Jennifer Kay Light-Holets ,  J. Steven Kolhouse ,  Govindarajan Kothandaraman ,  Carlos Alcides Lana

IPC: F01N3/20 ,  F02D41/02 ,  F02D41/40 ,  G01S19/42 ,  F02D41/00

Abstract: Systems and apparatuses include a controller including at least one processor coupled to a memory storing instructions that, when executed by the at least one processor, causes the controller to: determine a set of emission regulations based on a location of a vehicle; determine a target temperature of a catalyst of an aftertreatment system of the vehicle in response to the determined set of emission regulations; compare a current temperature of the catalyst to the determined target temperature; and in response to the current temperature of the catalyst being below the determined target temperature, provide a thermal management command to increase the catalyst temperature toward the determined target temperature.

公开(公告)号：US11415483B2

公开(公告)日：2022-08-16

申请号：US17469357

申请日：2021-09-08

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：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：US20220195954A1

公开(公告)日：2022-06-23

申请号：US17693016

申请日：2022-03-11

Applicant: Tula Technology, Inc.

Inventor： Matthew A. YOUNKINS ,  Xi LUO

IPC: F02D41/06 ,  F02D17/02 ,  F02P5/14 ,  F02D41/30 ,  F01L1/34 ,  F02D41/00 ,  F01N3/10 ,  F01N3/035 ,  F01N3/20 ,  F01M1/16 ,  F01L9/16 ,  F01M1/02 ,  F01M5/00

Abstract: A system and method for a variable displacement internal combustion engine using different types of pneumatic cylinder springs on skipped working cycles to control engine and aftertreatment system temperatures are described. The system and method may be used to rapidly heat up the aftertreatment system(s) and/or an engine block of the engine following a cold start by using one or more different types of pneumatic cylinder springs during skipped firing opportunities. By rapidly heating the aftertreatment system(s) and/or engine block, noxious emissions such as hydrocarbons, carbon monoxide, NOx and/or particulates, following cold starts are significantly reduced.

公开(公告)号：US11359561B2

公开(公告)日：2022-06-14

申请号：US16950632

申请日：2020-11-17

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

Inventor： Vijay Srinivasan

IPC: F02D13/06 ,  F02D17/02 ,  F02D41/00 ,  F02D41/30 ,  F02D41/40 ,  F01L13/00

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：US11300026B2

公开(公告)日：2022-04-12

申请号：US17017229

申请日：2020-09-10

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Shikui Kevin Chen ,  Matthew A. Younkins ,  Louis J. Serrano

IPC: F01N3/00 ,  F01N3/20 ,  F02D41/00 ,  F01N11/00 ,  F01N3/021 ,  F02D41/40 ,  F01N13/00 ,  F01N3/08

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.

公开(公告)号：US20220074361A1

公开(公告)日：2022-03-10

申请号：US17530179

申请日：2021-11-18

Applicant: Tula Technology, Inc.

Inventor： Mohammad R. PIRJABERI ,  Kian EISAZADEH-FAR ,  Steven E. CARLSON ,  Louis J. SERRANO

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

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.

公开(公告)号：US11248546B1

公开(公告)日：2022-02-15

申请号：US17080082

申请日：2020-10-26

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Elliott A. Ortiz-Soto ,  Shahaboddin Owlia

IPC: F02D41/00 ,  F02B37/12 ,  F02D17/02 ,  F02P9/00 ,  F02B5/02 ,  F02B9/04

Abstract: Engine controllers and control schemes are provided for managing engine state transitions requiring increased compressor pressure ratios in turbocharged engines operating in a cylinder output level modulation mode (e.g., skip fire, multi-level skip fire, or firing level modulation modes). In some circumstances, turbo lag can be mitigated by initially transitioning the engine to an intermediate effective firing density that is higher than both the initial and target effective firing density to increase the flow of gases through the engine and the turbocharger while maintaining a compressor ratio the same as or close to the initial compressor pressure ratio. After reaching a point where the desired torque is actually generated at the intermediate effective firing density, the operational effective firing density is gradually reduced to the target effective firing density while increasing the operational compressor pressure ratio to the target compressor ratio.