Transient combustion noise control in a hybrid powertrain including an HCCI engine
An engine and transmission system technology, applied in engine control, hybrid vehicles, combustion engines, etc., to solve problems such as incomplete combustion, torque interference, and annoying combustion noise
Active Publication Date: 2011-11-09
GM GLOBAL TECH OPERATIONS LLC
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AI Technical Summary
Problems solved by technology
Until the desired charge temperature and composition are achieved, incomplete combustion or rattling may occur, resulting in torque disturbance and annoying combustion noise, respectively
Method used
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Embodiment Construction
[0050] Referring now to the drawings, which are described for the purpose of illustrating certain exemplary embodiments only and not for the purpose of limiting the invention, figure 1 is a schematic cross-sectional view of an internal combustion engine 10 and accompanying engine control module 5 constructed in accordance with an embodiment of the present invention. Engine 10 is selectable to operate in a number of combustion modes, including a homogeneous charge compression ignition (HCCI) combustion mode and a homogeneous ignition combustion mode (SI). Engine 10 can alternatively be operated at a stoichiometric air-fuel ratio and a substantially lean stoichiometric air-fuel ratio. The invention is applicable to different internal combustion engine systems and combustion cycles.
[0051] The exemplary engine 10 includes a multi-cylinder direct injection four-stroke internal combustion engine having a piston 14 reciprocally slidably movable within cylinders 15 that define a v...
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The invention relates to the transient combustion noise control in a hybrid powertrain including an HCCI engine. The method for controlling a direct injection internal combustion engine and a torque machine configured to transfer torque to a driveline responsive to an operator torque request includes operating the direct injection internal combustion engine to transfer torque to the driveline, monitoring the operator torque request, determining a time constant associated with the operator torque request, detecting a fast transient condition associated with the operator torque request, providing a restricted engine torque command as a function of the operator torque request and the time constant, and during fast transient conditions controlling engine operation to achieve the restricted engine torque command, and operating the torque machine responsive to a motor torque command, the motor torque command corresponding to a difference between the operator torque request and the restricted engine torque command.
Description
technical field [0001] The present invention relates to a hybrid powertrain comprising an engine and a torque-generative device operable in an HCCI combustion mode. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] Known spark-ignition (SI) engines introduce an air / fuel mixture into each cylinder, which is compressed during the compression stroke and ignited by a spark plug. Known compression ignition engines inject pressurized fuel into the combustion cylinder near top dead center (TDC) of the compression stroke, where the fuel burns after injection. Combustion in both gasoline and diesel engines involves premixed or diffuse flames controlled by fluid mechanics. [0004] SI engines can operate in a number of different combustion modes, including homogeneous SI combustion mode and stratified charge SI combustion mode. SI engines may be configured t...
Claims
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IPC IPC(8): B60W10/06B60W10/08B60W20/00B60W40/08
CPCB60K6/48F02D41/1497Y02T10/6286B60W10/08B60W2510/0671Y02T10/642B60W10/06B60L2240/423B60W2540/106B60W2710/083B60W2510/0657B60L2240/443Y02T10/6221B60W30/192Y02T10/12Y02T10/62Y02T10/64
Inventor J-M.康张曼锋C-F.常
Owner GM GLOBAL TECH OPERATIONS LLC