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    SYSTEMS AND METHODS FOR COMBUSTING UNCONVENTIONAL FUEL CHEMISTRIES IN A DIESEL ENGINE ARCHITECTURE
    1.
    发明申请
    SYSTEMS AND METHODS FOR COMBUSTING UNCONVENTIONAL FUEL CHEMISTRIES IN A DIESEL ENGINE ARCHITECTURE 有权

    公开(公告)号：US20250027440A1

    公开(公告)日：2025-01-23

    申请号：US18594841

    申请日：2024-03-04

    Applicant: ClearFlame Engines, Inc.

    Inventor： Julie BLUMREITER ,  Bernard JOHNSON

    IPC: F02B9/04 ,  F02B3/08 ,  F02D13/02 ,  F02D19/08 ,  F02D41/00 ,  F02D41/06 ,  F02D41/30 ,  F02D41/40 ,  F02M26/13 ,  F02P5/145 ,  F02P19/04 ,  F02P21/00 ,  F02P23/00

    Abstract: Embodiments described herein relate to systems and methods of operating internal combustion (IC) engines by combusting various fuel chemistries therein. Specifically, engines described herein can operate a wide range of fuel chemistries with varying molecular formulas. The chemical compositions of the fuels described herein make them more difficult to ignite than long chain hydrocarbons (i.e., fuels that include 6 or more carbon atoms in a molecule). In some embodiments, engines described herein can combust fuels that have the chemical properties of alcohols. In some embodiments, engines described herein can combust fuels that include hydroxide groups. Examples of such fuels include methanol and/or ethanol. In some embodiments, engines described herein can combust natural gas. These fuel chemistries are difficult to ignite, particularly at low temperatures and during initial engine startup. Systems and methods described herein address these ignition difficulties, particularly in diesel engine architectures.

    Fast torque response for boosted engines
    2.
    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.

    COLD START FOR HIGH-OCTANE FUELS IN A DIESEL ENGINE ARCHITECTURE
    5.
    发明申请
    COLD START FOR HIGH-OCTANE FUELS IN A DIESEL ENGINE ARCHITECTURE 有权

    公开(公告)号：US20210054777A1

    公开(公告)日：2021-02-25

    申请号：US17092474

    申请日：2020-11-09

    Applicant: ClearFlame Engines, Inc.

    Inventor： Julie BLUMREITER ,  Bernard JOHNSON

    IPC: F02B9/04 ,  F02D41/40 ,  F02P5/145 ,  F02D41/00 ,  F02D13/02 ,  F02D41/06 ,  F02M26/13 ,  F02P23/00 ,  F02P21/00 ,  F02P19/04

    Abstract: Embodiments disclosed herein relate generally to systems and methods of operating internal combustion (IC) engines, and more specifically to systems and methods of starting compression ignition (CI) engines when the surrounding environment is significantly colder than the normal operating temperature of the engine (i.e., “cold-starting”). In some embodiments, the CI engine can include an ignition-assist device. In some embodiments, a method of operating a CI engine during cold-start can include opening an intake valve to draw a volume of air into the combustion chamber, moving a piston from a bottom-dead-center position to a top-dead-center position in a combustion chamber at a compression ratio of between about 15 and about 25, injecting a volume of fuel, the fuel having a cetane number of less than about 30, closing the intake valve, and combusting substantially all of the volume of fuel.

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