公开(公告)号：US20220120230A1

公开(公告)日：2022-04-21

申请号：US17075072

申请日：2020-10-20

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Mark A. WILCUTTS ,  Xi LUO ,  Anastasios ARVANITIS

IPC: F02D41/00 ,  F01N3/021 ,  F01M1/02 ,  B60W10/08 ,  F01N3/10 ,  F02D41/02 ,  F02D41/14 ,  B60W30/20 ,  F02D41/06 ,  B60W10/06 ,  F01N3/20 ,  F02B67/06 ,  F02D13/02 ,  F02D41/40 ,  F01M5/00

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 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：US20230392561A1

公开(公告)日：2023-12-07

申请号：US17830925

申请日：2022-06-02

Applicant: Tula Technology, Inc.

Inventor： Louis J. SERRANO ,  Xin YUAN ,  Shikui Kevin CHEN ,  Xi LUO ,  Robert C. WANG ,  Xiaoping CAI ,  Vijay SRINIVASAN

IPC: F02D41/00 ,  F02D41/24

CPC classification number: F02D41/0087 ,  F02D41/2403 ,  F02D41/0085 ,  F02D2200/1002 ,  F02D2200/50 ,  F02D2200/0802

Abstract: A system and method for operating an ICE by (a) generating a running history of one or more-cylinder events per cylinder, and (b) using the running history to select a least-used non-rotating firing pattern, among a plurality of non-rotating firing patterns, provided for each firing fraction less than one (1). By making the least used selection based on the running history, unequal usage among cylinders of the ICE can be mitigated.

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：US20210363931A1

公开(公告)日：2021-11-25

申请号：US17224648

申请日：2021-04-07

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Matthew A. YOUNKINS ,  Xi LUO

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

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：US20200072152A1

公开(公告)日：2020-03-05

申请号：US16552052

申请日：2019-08-27

Applicant: Tula Technology, Inc.

Inventor： Xi LUO ,  Jerry F. FUSCHETTO ,  Xin YUAN ,  Matthew A. YOUNKINS

IPC: F02D41/30 ,  F02D41/40

Abstract: A vehicle, engine controller and method for coordinating direct split injection of two or more pulses of fuel during a working cycle of a reactivated cylinder which was deactivated in a previous working cycle is described. By using split injection for the reactivated cylinder, the particulate matter and particulate number (“PM/PN”) generated by the reactivated cylinder is reduced.