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    Engine diagnostics with skip fire control
    2.
    发明授权
    Engine diagnostics with skip fire control 有权
    发动机诊断与跳火控制

    公开(公告)号：US09581098B2

    公开(公告)日：2017-02-28

    申请号：US14939498

    申请日：2015-11-12

    Applicant: Tula Technology Inc.

    Inventor： Shikui Kevin Chen ,  Xin Yuan ,  Joshua P. Switkes ,  Steven E. Carlson ,  Mark A. Shost

    IPC: F02D17/02 ,  F02D41/00 ,  F02D17/00 ,  F02D37/02 ,  F02D41/02 ,  F02D41/20

    CPC classification number: F02D41/0087 ,  F02D17/00 ,  F02D17/02 ,  F02D37/02 ,  F02D41/00 ,  F02D41/0082 ,  F02D41/0235 ,  F02D2041/2027 ,  F02D2250/18 ,  Y02T10/44

    Abstract: Methods and devices are described for performing engine diagnostics during skip fire operation of an engine while a vehicle is being driven. Knowledge of the firing sequence is used to determine appropriate times to conduct selected diagnostics and/or to help better interpret sensor inputs or diagnostic results. In one aspect, selected diagnostics are executed when a single cylinder is fired a plurality of times in isolation relative to a sensor used in the diagnosis. In another aspect, selected diagnostics are conducted while the engine is operated using a firing sequence that insures that no cylinders in a first cylinder bank are fired for a plurality of engine cycles while cylinders in a second bank are at least sometimes fired. The described tests can be conducted opportunistically, when conditions are appropriate, or specific firing sequences can be commanded to achieve the desired isolation or skipping of one or more selected cylinders.

    Abstract translation: 描述了用于在车辆被驱动时在发动机的跳过点火操作期间执行发动机诊断的方法和装置。 了解激发序列用于确定适当的时间以进行选定的诊断和/或帮助更好地解释传感器输入或诊断结果。 在一个方面，当单个气缸相对于诊断中使用的传感器被隔离多次时，执行选择的诊断。 在另一方面，当使用确保在第一气缸组中没有气缸在多个发动机循环中被点火的点火顺序来操作发动机时，进行选择的诊断，而在第二组中的气缸至少有时被点火。 所描述的测试可以在条件合适的情况下机会地进行，或者可以命令特定的点火顺序来实现一个或多个选择的气缸的期望的隔离或跳过。

    Control of manifold vacuum in skip fire operation
    3.
    发明授权
    Control of manifold vacuum in skip fire operation 有权
    在跳火操作中控制歧管真空

    公开(公告)号：US09273643B2

    公开(公告)日：2016-03-01

    申请号：US13961701

    申请日：2013-08-07

    Applicant: Tula Technology, Inc.

    Inventor： Steven E. Carlson ,  Xin Yuan ,  Joshua P. Switkes ,  Louis J. Serrano

    IPC: F02M25/08 ,  F02M35/10 ,  F02D41/00 ,  F02D17/02 ,  F02D29/02 ,  F02D9/02

    CPC classification number: F02M25/08 ,  F02D17/02 ,  F02D29/02 ,  F02D41/003 ,  F02D41/0087 ,  F02D2009/024 ,  F02D2250/08 ,  F02D2250/41 ,  F02M25/089 ,  F02M35/10222 ,  F02M35/10229

    Abstract: A variety of methods and arrangements are described for selectively reducing intake manifold pressure in a skip fire engine control system. In some embodiments, a throttle is adjusted to generate a manifold vacuum, which is used for various applications, including but not limited to purging a fuel vapor canister, reducing pressure within a brake vacuum booster reservoir and/or venting gas from a crankcase interior. An engine firing fraction is increased to help maintain a desired torque level. Other techniques for reducing the intake manifold pressure are also described, such as applications involving a return to idle.

    Abstract translation: 描述了各种方法和布置，用于选择性地减少跳火消防车控制系统中的进气歧管压力。 在一些实施例中，调节节气门以产生歧管真空，其用于各种应用，包括但不限于清除燃料蒸汽罐，降低制动真空助力器容器内的压力和/或从曲轴箱内部排出气体。 发动机点火分数增加以帮助保持期望的转矩水平。 还描述了用于降低进气歧管压力的其它技术，例如涉及返回空转的应用。

    Engine braking controller
    7.
    发明授权
    Engine braking controller 有权
    发动机制动控制器

    公开(公告)号：US09328672B2

    公开(公告)日：2016-05-03

    申请号：US13953615

    申请日：2013-07-29

    Applicant: Tula Technology, Inc.

    Inventor： Louis J. Serrano ,  Steven E. Carlson ,  Joshua P. Switkes ,  Ronald D. Yuille

    IPC: F02D13/04 ,  F02D41/00 ,  F02D17/02 ,  F02D41/12 ,  F02D13/02

    CPC classification number: F02D17/02 ,  F02D13/0203 ,  F02D13/04 ,  F02D41/0005 ,  F02D41/0087 ,  F02D41/123

    Abstract: In one aspect of the invention, an engine is operated in a skip cylinder engine braking mode. In the skip cylinder engine braking mode, selected working cycles of selected working chambers are deactivated. Other selected working cycles of the selected working chambers are operated in a braking mode. Accordingly, individual working chambers are sometimes deactivated and sometimes operated in the braking mode while the engine is operating in the skip cylinder engine braking mode. Various methods for cylinder control are described, which improve fuel economy, catalytic converter performance, and vehicle NVH characteristics.

    Abstract translation: 在本发明的一个方面，发动机以跳过气缸发动机制动模式操作。 在跳过气缸发动机制动模式下，所选择的工作室的选定工作循环被停用。 所选择的工作室的其他选定的工作循环在制动模式下操作。 因此，当发动机以跳过气缸发动机制动模式运行时，单个工作室有时被停用并且有时在制动模式下操作。 描述了用于气缸控制的各种方法，其提高燃料经济性，催化转化器性能和车辆NVH特性。

    Engine torque smoothing
    9.
    发明授权
    Engine torque smoothing 有权

    公开(公告)号：US10787979B2

    公开(公告)日：2020-09-29

    申请号：US16278075

    申请日：2019-02-16

    Applicant: Tula Technology, Inc.

    Inventor： Mohammad R. Pirjaberi ,  Kian Eisazadeh-Far ,  Steven E. Carlson ,  Louis J. Serrano

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

    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.

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

    公开(公告)号：US10196995B2

    公开(公告)日：2019-02-05

    申请号：US15679419

    申请日：2017-08-17

    Applicant: Tula Technology, Inc.

    Inventor： Mohammad R. Pirjaberi ,  Kian Eisazadeh-Far ,  Steven E. Carlson ,  Ying Ren ,  Joel D. Van Ess

    IPC: F02D41/00 ,  F02D41/30 ,  F02D41/14 ,  B60W20/00

    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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