公开(公告)号：US20220307434A1

公开(公告)日：2022-09-29

申请号：US17213387

申请日：2021-03-26

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

Inventor： Louis J. Serrano ,  Kevin Shikui Chen ,  Xiaoping Cai ,  John Fuerst

IPC: F02D41/00 ,  B60W20/15 ,  B60W10/06 ,  B60W10/08 ,  B60W30/18 ,  F02D41/12 ,  F02D41/02

Abstract: A variety of methods and arrangements are described for operating an engine in a skip fire manner so that engine requirements, such as exhaust temperature, exhaust flow, torque and NVH, are met.

公开(公告)号：US20220251992A1

公开(公告)日：2022-08-11

申请号：US17686247

申请日：2022-03-03

Applicant: Tula Technology, Inc.

Inventor： Shikui Kevin CHEN ,  Matthew A. YOUNKINS ,  Louis J. SERRANO

IPC: 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：US20220220919A1

公开(公告)日：2022-07-14

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：US20220205398A1

公开(公告)日：2022-06-30

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 ,  F02D41/22 ,  F02D41/14 ,  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：US11333099B2

公开(公告)日：2022-05-17

申请号：US17218657

申请日：2021-03-31

Applicant: Tula Technology, Inc.

Inventor： Andrew W. Phillips ,  Jerry F. Fuschetto

IPC: F02D41/00 ,  F02D41/40 ,  F02D13/02 ,  F02D41/38

Abstract: A skip fire engine controller is disclosed that commands an early direct-injection of fuel during a skipped working cycle in which a cylinder is not exhausted. With early direct injection, the fuel has more time to vaporize and mix with air for combustion in an immediately following working cycle in which the cylinder is fired. By increasing the degree of vaporization and mixing, the combustion is both cleaner and more efficient.

公开(公告)号：US11326534B2

公开(公告)日：2022-05-10

申请号：US17407984

申请日：2021-08-20

Applicant: Tula Technology, Inc.

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

IPC: F02D41/14 ,  F01N13/10 ,  F02D41/00 ,  F02D41/22 ,  F02B5/02 ,  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：US11261807B2

公开(公告)日：2022-03-01

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: F02D13/06 ,  F02D17/02 ,  F02D41/00 ,  F01N11/00 ,  F01N9/00 ,  F02D41/12 ,  F02D41/30 ,  F01L13/00

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：US11208964B2

公开(公告)日：2021-12-28

申请号：US17002309

申请日：2020-08-25

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：US20210348573A1

公开(公告)日：2021-11-11

申请号：US17186979

申请日：2021-02-26

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Vijay SRINIVASAN ,  Louis J. SERRANO ,  Xiaoping CAI ,  J. Steven KOLHOUSE ,  Avra BRAHMA ,  Adrian P. DALE

IPC: F02D41/00 ,  F02M26/05

Abstract: Managing firing fraction transitions of a variable displacement internal combustion engines by (a) avoiding transport delays in an Exhaust Gas Recirculation (EGR) feed by starting movement of an EGR valve position after a decision to transition to a new firing fraction has been made, but prior to the start of the transition and (b) adjusting the EGR valve as needed during the transition so as to maintain an EGR fraction within a predetermined range during the transition. By performing both (a) and (b), spikes of nitrous oxide (NOx) and/or hydrocarbon emissions are reduced or altogether eliminated during the transition.

公开(公告)号：US20210199060A1

公开(公告)日：2021-07-01

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

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.