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    ENGINE TORQUE SMOOTHING
    112.
    发明申请
    ENGINE TORQUE SMOOTHING 有权

    公开(公告)号：US20220074361A1

    公开(公告)日：2022-03-10

    申请号：US17530179

    申请日：2021-11-18

    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.

    Fast torque response for boosted engines
    113.
    发明授权
    Fast torque response for boosted engines 有权

    公开(公告)号：US11248546B1

    公开(公告)日：2022-02-15

    申请号：US17080082

    申请日：2020-10-26

    Applicant: Tula Technology, Inc. ,  Cummins Inc.

    Inventor： Elliott A. Ortiz-Soto ,  Shahaboddin Owlia

    IPC: F02D41/00 ,  F02B37/12 ,  F02D17/02 ,  F02P9/00 ,  F02B5/02 ,  F02B9/04

    Abstract: Engine controllers and control schemes are provided for managing engine state transitions requiring increased compressor pressure ratios in turbocharged engines operating in a cylinder output level modulation mode (e.g., skip fire, multi-level skip fire, or firing level modulation modes). In some circumstances, turbo lag can be mitigated by initially transitioning the engine to an intermediate effective firing density that is higher than both the initial and target effective firing density to increase the flow of gases through the engine and the turbocharger while maintaining a compressor ratio the same as or close to the initial compressor pressure ratio. After reaching a point where the desired torque is actually generated at the intermediate effective firing density, the operational effective firing density is gradually reduced to the target effective firing density while increasing the operational compressor pressure ratio to the target compressor ratio.

    Skip fire valve control
    114.
    发明授权
    Skip fire valve control 有权

    公开(公告)号：US11236689B2

    公开(公告)日：2022-02-01

    申请号：US17002548

    申请日：2020-08-25

    Applicant: Tula Technology, Inc.

    Inventor： Xin Yuan ,  Matthew A. Younkins

    IPC: F02D41/04 ,  F02D13/06 ,  F02D17/02 ,  F02P5/145 ,  F02D41/00 ,  F02D13/02 ,  F02D41/10 ,  F02D41/12 ,  F01L1/047 ,  F02D41/26 ,  F02P5/15 ,  F02D11/02

    Abstract: In various aspects, internal combustion engines, engine controllers and methods of controlling engines are described. The engine includes a camshaft and a two cylinder sets. Cylinders in the first are deactivatable and cylinders in the second set may be fired at high or low output levels. The air charge for each fired working cycle is set based on whether a high or low torque output is selected. In some implementations, the camshaft is axially shiftable between first and second positions. First cam lobes are configured to cause their associated cylinders to intake a large air charge during intake strokes that occur when the camshaft is in the first position. Second cam lobes for cylinders in the second set cause their associated cylinders to intake a smaller air charge when the camshaft is in the second position. Second cam lobes for cylinders in the first set deactivate their associated cylinders.

    SKIP FIRE VALVE CONTROL
    120.
    发明申请
    SKIP FIRE VALVE CONTROL 有权

    公开(公告)号：US20210262405A1

    公开(公告)日：2021-08-26

    申请号：US17314785

    申请日：2021-05-07

    Applicant: Tula Technology, Inc.

    Inventor： Louis J. SERRANO ,  Matthew A. YOUNKINS

    IPC: F02D41/00 ,  F02D41/04 ,  F02D13/06 ,  F02D13/02 ,  F02D17/02 ,  F02D41/10 ,  F02D41/12 ,  F02P5/145 ,  F01L1/047 ,  F02D41/26 ,  F02P5/15 ,  F02D11/02

    Abstract: In various aspects, internal combustion engines, engine controllers and methods of controlling engines are described. The engine includes a camshaft and a two cylinder sets. Cylinders in the first are deactivatable and cylinders in the second set may be fired at high or low output levels. The air charge for each fired working cycle is set based on whether a high or low torque output is selected. In some implementations, the camshaft is axially shiftable between first and second positions. First cam lobes are configured to cause their associated cylinders to intake a large air charge during intake strokes that occur when the camshaft is in the first position. Second cam lobes for cylinders in the second set cause their associated cylinders to intake a smaller air charge when the camshaft is in the second position. Second cam lobes for cylinders in the first set deactivate their associated cylinders.

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