公开(公告)号：US11208093B1

公开(公告)日：2021-12-28

申请号：US17138064

申请日：2020-12-30

Applicant: Tula Technology, Inc.

Inventor： Vijay Srinivasan ,  Louis Joseph Serrano

IPC: B60T1/00 ,  B60W20/13 ,  B60W20/15 ,  F02P9/00 ,  F02D13/02 ,  F02D13/04 ,  B60W10/06 ,  F02D41/00 ,  F02D41/14 ,  B60W10/08

Abstract: Methods, systems, and devices for managing motor torque smoothing for internal combustion engine cylinder recharging events are described herein. An engine controller in a vehicle for managing motor torque smoothing for internal combustion engine cylinder recharging events may be configured to operate the internal combustion engine at a firing fraction that is less than a value of 1.0, wherein one or more cylinders are not designated to be fired, determine a recharge event time period where a particular one of the cylinders that have not been designated to be fired is recharged, identify a disruption quantity of torque during the recharging event time period, and actuate an additional motor to initiate a supplemental quantity of torque during the recharge event time period based on the disruption quantity of torque.

公开(公告)号：US20210372312A1

公开(公告)日：2021-12-02

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

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：US11125175B2

公开(公告)日：2021-09-21

申请号：US17026706

申请日：2020-09-21

Applicant: Tula Technology, Inc.

Inventor： Shikui Kevin Chen ,  Aditya Mandal ,  Li-Chun Chien ,  Elliott Ortiz-Soto

IPC: F02D41/14 ,  F02B5/02 ,  F01N13/10 ,  F02D41/00 ,  F02D41/22 ,  F02B9/04 ,  G06N20/00 ,  G06N5/04

Abstract: Using machine learning for cylinder misfire detection in a dynamic firing level modulation controlled internal combustion engine is described. In a classification embodiment, cylinder misfires are differentiated from intentional skips based on a measured exhaust manifold pressure. In a regressive model embodiment, the measured exhaust manifold pressure is compared to a predicted exhaust manifold pressure generated by neural network in response to one or more inputs indicative of the operation of the vehicle. Based on the comparison, a prediction is made if a misfire has occurred or not. In yet other alternative embodiment, angular crank acceleration is used as well for misfire detection.

公开(公告)号：US20210199061A1

公开(公告)日：2021-07-01

申请号：US17183856

申请日：2021-02-24

Applicant: Tula Technology, Inc.

Inventor： Jerry F. FUSCHETTO ,  Matthew A. YOUNKINS ,  Ihab S. SOLIMAN ,  Mark A. WILCUTTS ,  Steven E. CARLSON ,  Louis J. SERRANO

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

Abstract: Various methods and arrangements for improving fuel economy and noise, vibration, and harshness (NVH) in a skip fire controlled engine are described. An engine controller dynamically selects a gas spring type for a skipped firing opportunity. Determination of the skip/fire pattern and gas spring type may be made on a firing opportunity by firing opportunity basis.

公开(公告)号：US10927780B2

公开(公告)日：2021-02-23

申请号：US16839609

申请日：2020-04-03

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Vijay Srinivasan

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

Abstract: A skip fire controlled internal combustion engine supplies motive power to move to a platform. 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 operational firing fraction is based in part on the platform weight.

公开(公告)号：US20210040904A1

公开(公告)日：2021-02-11

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 ,  F01N9/00 ,  F02D41/12 ,  F02D13/06

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：US10830166B2

公开(公告)日：2020-11-10

申请号：US16246888

申请日：2019-01-14

Applicant: Tula Technology, Inc.

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

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

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：US10816438B2

公开(公告)日：2020-10-27

申请号：US16180703

申请日：2018-11-05

Applicant: Tula Technology, Inc.

Inventor： Shikui Kevin Chen ,  Aditya Mandal ,  Li-Chun Chien ,  Elliott Ortiz-Soto

IPC: G01M15/11 ,  F02D35/02 ,  G06N3/08 ,  G06N5/04 ,  G06N20/00 ,  F02D41/00 ,  F02D41/14 ,  G06N3/04

Abstract: Using machine learning for misfire detection in a Dynamic firing level modulation controlled internal combustion engine is described. A neural network is used to calculate expected crank acceleration from various inputs, including the dynamically defined cylinder skip fire sequence. The output of the neural network is then compared to a signal indicative of the measured crank acceleration. Based the comparison, a prediction is made if a misfire has occurred or not. In alternative embodiment, the neural network is expanded to include the measured crank acceleration as an additional input. With the latter embodiment, the neural network is arranged to directly predict misfire events.

公开(公告)号：US20200088151A1

公开(公告)日：2020-03-19

申请号：US16694621

申请日：2019-11-25

Applicant: Tula Technology, Inc.

Inventor： Elliot A. ORTIZ-SOTO ,  Matthew A. YOUNKINS

IPC: F02P5/04 ,  F02D13/06 ,  F02D41/30 ,  F02D13/02 ,  F01N13/00 ,  F02D41/00 ,  F02P5/15

Abstract: Methods, devices, controllers, and algorithms are described for operating an internal combustion engine wherein at least some firing opportunities utilize low temperature gasoline combustion (LTGC). Other firing opportunities may be skipped or utilize some other type of combustion, such as spark ignition. The nature of any particular firing opportunity is dynamically determined during engine operation, often on a firing opportunity by firing opportunity basis. Firings that utilize LTGC produce little, if any, nitrous oxides in the exhaust stream and thus, in some implementations, may require no aftertreatment system to remove them from the exhaust stream.

公开(公告)号：US10578037B2

公开(公告)日：2020-03-03

申请号：US15918258

申请日：2018-03-12

Applicant: Tula Technology, Inc.

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

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

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 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.