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    Single-shaft dual expansion internal combustion engine
    24.
    发明授权
    Single-shaft dual expansion internal combustion engine 有权

    公开(公告)号：US09605708B2

    公开(公告)日：2017-03-28

    申请号：US14610409

    申请日：2015-01-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Russell P. Durrett ,  Paul M. Najt ,  Peter Andruskiewicz

    IPC: F02B75/24 ,  F16C7/02 ,  F02B75/32 ,  F02B41/06 ,  F02B33/00

    CPC classification number: F16C7/023 ,  F02B33/00 ,  F02B41/06 ,  F02B75/32

    Abstract: A single-shaft dual expansion internal combustion engine is described, and includes an engine block including first and second power cylinders and an expander cylinder fluidly coupled through a cylinder head, and first and second power pistons that connect to respective first and second crankpins of the crankshaft. A multi-link connecting rod assembly includes a rigid main arm extending orthogonally to a longitudinal axis of the crankshaft and supporting a first pivot pin, a second pivot pin and a third pivot pin. The first pivot pin connects via a connecting rod to an expander piston reciprocating in the third cylinder. A third crankpin of the crankshaft serves as the second pivot pin and has a throw that is located 180 degrees of rotation of the crankshaft from a throw of the first crankpin. The third pivot pin connects to a swing arm connected to the engine block.

    PISTON COMPOUND INTERNAL COMBUSTION ENGINE WITH EXPANDER DEACTIVATION
    25.
    发明申请
    PISTON COMPOUND INTERNAL COMBUSTION ENGINE WITH EXPANDER DEACTIVATION 有权
    活塞式复合内燃机，具有膨胀器停止功能

    公开(公告)号：US20140123958A1

    公开(公告)日：2014-05-08

    申请号：US14050089

    申请日：2013-10-09

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Russell P. Durrett ,  Paul M. Najt ,  Peter Andruskiewicz

    IPC: F02B75/04

    CPC classification number: F02B75/04 ,  F02B41/08

    Abstract: A piston compound internal combustion engine is disclosed with an expander piston deactivation feature. A piston internal combustion engine is compounded with a secondary expander piston, where the expander piston extracts energy from the exhaust gases being expelled from the primary power pistons. The secondary expander piston can be deactivated and immobilized, or its stroke can be reduced, under low load conditions in order to reduce parasitic losses and over-expansion. Two mechanizations are disclosed for the secondary expander piston's coupling with the power pistons and crankshaft. Control strategies for activation and deactivation of the secondary expander piston are also disclosed.

    Abstract translation: 公开了具有膨胀机活塞停用特征的活塞复合式内燃机。 活塞内燃机与二次膨胀活塞混合，其中膨胀机活塞从废气中抽出能量从主动力活塞中排出。 可以在低负载条件下，二次膨胀活塞被去活和固定，或者可以降低其行程，以减少寄生损耗和过度膨胀。 公开了两个机械化用于二次膨胀活塞与动力活塞和曲轴的联接。 还公开了二次膨胀活塞的活化和失活的控制策略。

    Exhaust compound internal combustion engine with controlled expansion
    29.
    发明授权
    Exhaust compound internal combustion engine with controlled expansion 有权

    公开(公告)号：US09897000B2

    公开(公告)日：2018-02-20

    申请号：US14736030

    申请日：2015-06-10

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Russell P. Durrett ,  Paul M. Najt ,  Peter P. Andruskiewicz

    IPC: F02B33/22 ,  F02B75/04 ,  F02B41/08

    CPC classification number: F02B75/04 ,  F02B41/08

    Abstract: A piston compound internal combustion engine is disclosed with an expander piston deactivation feature. A piston internal combustion engine is compounded with a secondary expander piston, where the expander piston extracts energy from the exhaust gases being expelled from the primary power pistons. The secondary expander piston can be deactivated and immobilized, or its stroke can be reduced, under low load conditions in order to reduce parasitic losses and over-expansion. Two mechanizations are disclosed for the secondary expander piston's coupling with the power pistons and crankshaft. Control strategies for activation and deactivation of the secondary expander piston are also disclosed. In addition, six-cylinder engine configurations are defined by replicating groups of two power pistons and one expander piston.

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