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    Adaptive torque mitigation by micro-hybrid system
    1.
    发明授权
    Adaptive torque mitigation by micro-hybrid system 有权

    公开(公告)号：US10344692B2

    公开(公告)日：2019-07-09

    申请号：US15918284

    申请日：2018-03-12

    Applicant: Tula Technology, Inc.

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

    IPC: F02D41/00 ,  F02D41/14 ,  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 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.

    Firing fraction management in skip fire engine control
    2.
    发明授权
    Firing fraction management in skip fire engine control 有权
    点火发动机控制中的点火部分管理

    公开(公告)号：US09528446B2

    公开(公告)日：2016-12-27

    申请号：US13654248

    申请日：2012-10-17

    Applicant: Tula Technology, Inc.

    Inventor： Mohammad R. Pirjaberi ,  Adya S. Tripathi

    IPC: F02D17/00 ,  F02D17/02 ,  F02D41/00 ,  F02D13/06 ,  F02D37/02 ,  F02D41/28

    CPC classification number: F02D17/02 ,  F02D13/06 ,  F02D37/02 ,  F02D41/0087 ,  F02D2041/286 ,  F02D2200/101

    Abstract: In various described embodiments skip fire control is used to deliver a desired engine output. A controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. In one aspect, the skip fire controller is arranged to select a base firing fraction that has a repeating firing cycle length that will repeat at least a designated number of times per second at the current engine speed. Such an arrangement can be helpful in reducing the occurrence of undesirable vibrations.

    Abstract translation: 在各种描述的实施例中，跳过火控制用于传递期望的发动机输出。 控制器确定跳过火焰射击分数以及（适当地）适合于递送请求的输出的相关联的引擎设置。 在一个方面，跳过火控制器布置成选择具有重复的发射周期长度的基本点火分数，其将以当前发动机转速每秒重复至少指定次数。 这种布置可以有助于减少不期望的振动的发生。

    Skip fire engine control
    3.
    发明授权
    Skip fire engine control 有权
    跳过消防车控制

    公开(公告)号：US08499743B2

    公开(公告)日：2013-08-06

    申请号：US13723169

    申请日：2012-12-20

    Applicant: Tula Technology, Inc.

    Inventor： Adya S. Tripathi ,  Joshua P. Switkes ,  Mohammad R. Pirjaberi ,  Christopher W. Chandler

    IPC: F02D17/02 ,  F02D41/00 ,  G06F19/00

    CPC classification number: F02D17/02 ,  F02D37/02 ,  F02D41/0087 ,  F02D41/1401 ,  F02D41/1402 ,  F02D41/266 ,  F02D2041/2027 ,  F02D2200/602 ,  F02D2250/18 ,  F02D2400/02 ,  F02P5/1512 ,  Y02T10/142 ,  Y02T10/46

    Abstract: A variety of skip fire engine controllers and control techniques are described. In some preferred embodiments, a skip fire engine controller is provided that includes a firing fraction calculator, an engine settings controller, a firing fraction adjuster and a firing controller. The firing fraction calculator determines a reference firing fraction indicative of a firing fraction suitable for delivering a desired engine output at a reference working chamber firing output. The engine settings controller is arranged to set selected engine settings. The firing fraction adjuster determines an adjusted firing fraction that scales the reference firing fraction appropriately such that the engine will deliver the desired engine output at the current engine settings even when the actual working chamber firing outputs do not equal the reference working chamber firing output. The firing controller direct workings chamber firings in a skip fire manner that delivers the adjusted firing fraction.

    Abstract translation: 描述了各种跳火消防车控制器和控制技术。 在一些优选实施例中，提供了一种跳火消防车控制器，其包括点火分数计算器，发动机设置控制器，点火分数调节器和点火控制器。 点火分数计算器确定指示在基准工作室点火输出下适合输送所需发动机输出的点火分数的参考点火分数。 引擎设置控制器被设置为设置所选择的引擎设置。 点火分数调节器确定调节的燃烧分数，适当地缩放参考燃烧分数，使得即使当实际工作室燃烧输出不等于参考工作室点火输出时，发动机也将在当前发动机设置下输送期望的发动机输出。 射击控制器直接工作室以跳火方式发射，从而提供调整后的射击分数。

    Firing fraction management in skip fire engine control
    5.
    发明授权
    Firing fraction management in skip fire engine control 有权

    公开(公告)号：US11280276B2

    公开(公告)日：2022-03-22

    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 ,  F02D37/02 ,  F02D41/28

    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.

    Induction diagnostics for skip fire engines
    9.
    发明授权
    Induction diagnostics for skip fire engines 有权

    公开(公告)号：US09891137B2

    公开(公告)日：2018-02-13

    申请号：US15641097

    申请日：2017-07-03

    Applicant: Tula Technology, Inc.

    Inventor： Shikui Kevin Chen ,  Allan J. Kotwicki ,  Joel D. Van Ess ,  Robert S. Bailey ,  Mohammad R. Pirjaberi

    IPC: G01M15/05 ,  F02M35/10 ,  G01M15/09

    CPC classification number: G01M15/05 ,  F02M35/1038 ,  G01M15/09

    Abstract: A variety of methods and arrangements for detecting failure of the commanded air induction in an internal combustion engine are described. In some embodiments, the intake manifold pressure is monitored. An air induction event generates a fluctuation in the intake manifold pressure, which is recorded. The signal is processed through a diagnostic filter to help determine whether the actual induction matched the commanded induction. In other embodiments, measured crankshaft acceleration is compared with estimated crankshaft acceleration. If the two quantities differ by a threshold amount an induction fault is detected. The two detection methods may also be combined. The describe approaches are particularly well suited for use in engines operating in a skip fire mode with cylinder deactivation and/or a dynamic firing level modulation mode.

    Engine torque smoothing
    10.
    发明授权
    Engine torque smoothing 有权

    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.

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