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公开(公告)号：US20180238264A1
公开(公告)日：2018-08-23
申请号：US15436856
申请日：2017-02-19
Applicant: GM Global Technology Operations LLC
Inventor： Alberto Lorenzo VASSALLO , Giuseppe GRIOLI , Vincenzo PEZZA
IPC: F02F3/26
CPC classification number: F02B23/0693 , F02B23/0672 , F02B23/0678
Abstract: A piston for a diesel engine, includes a piston body having a generally planar crown and a skirt extending from the crown. A stepped combustion bowl is recessed in the crown and includes an outer bowl recessed relative to the crown and an inner bowl recessed relative to the outer bowl.
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公开(公告)号：US20180313283A1
公开(公告)日：2018-11-01
申请号：US15583296
申请日：2017-05-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
CPC classification number: F02D41/029 , B60W20/16 , B60W30/1882 , F01N3/021 , F01N3/0842 , F01N3/103 , F02D41/0275 , F02D41/3005 , F02D41/405 , F02D2041/026
Abstract: A vehicle propulsion system includes an internal combustion engine configured to output a primary output torque and at least one fuel injector arranged to supply fuel to a combustion chamber of the engine. The propulsion system also includes at least one exhaust aftertreatment device to capture combustion byproducts within an exhaust flow. The propulsion system also includes an electric machine coupled to the engine to exchange torque. A controller is programmed to supply a baseline fuel injection corresponding to a first engine output to satisfy a driver torque demand and to periodically supplement the baseline target fuel injection quantity to increase engine output torque to overshoot the first engine output thereby increasing combustion byproducts to regenerate the at least one exhaust aftertreatment device. The controller is also programmed to apply a resistive torque from the electric machine such that an overall propulsion system torque remains at the driver torque demand.
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