Method for controlling a spark-ignition direct-injection internal combustion engine at low loads

A spark ignition and injection technology, applied in spark ignition controllers, internal combustion piston engines, electrical control, etc., can solve problems such as increasing combustion instability and reducing fuel efficiency

Inactive Publication Date: 2011-01-12
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] however, excess fuel reformation to increase the operable range of controlled auto-ignition may increase combustion instability and thereby reduce fuel efficiency

Method used

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  • Method for controlling a spark-ignition direct-injection internal combustion engine at low loads
  • Method for controlling a spark-ignition direct-injection internal combustion engine at low loads
  • Method for controlling a spark-ignition direct-injection internal combustion engine at low loads

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Embodiment Construction

[0069] Referring now to the drawings, the illustrations therein are for illustration of certain exemplary embodiments only and are not intended to limit the invention. figure 1 An internal combustion engine 10 constructed in accordance with an embodiment of the present disclosure and associated control module 5 is schematically shown. Engine 10 is selectively operable in a variety of combustion modes, including a controlled auto-ignition combustion mode, a homogeneous spark-ignition combustion mode, and a stratified spark-ignition combustion mode. Engine 10 is selectively operated at a stoichiometric air / fuel ratio and at a stoichiometric predominantly lean air / fuel ratio. The present disclosure can be applied to various internal combustion engine systems and combustion cycles.

[0070] In one embodiment, engine 10 may be connected to a transmission arrangement (not shown) for transmitting tractive power to a powertrain (not shown) of a motor vehicle. The transmission, which...

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Abstract

A spark-ignition direct-injection internal combustion engine is controlled at low loads through split fuel injections and spark discharges including one injection and spark during a negative valve overlap period and another injection and spark during a compression phase of the engine cycle.

Description

technical field [0001] The present disclosure relates to the operation and control of homogeneous compression ignition (HCCI) engines. 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, which ignites after injection. Combustion for both gasoline and diesel engines involves a premixed or diffusion flame controlled by fluid mechanics. [0004] SI engines are capable of operating in a number of different combustion modes, including homogeneous SI combustion mode and stratified SI combustion mode. SI engines can be set to operate in a combustion mode of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D13/02F02D41/34F02D41/40F02P5/04F01N9/00F02B23/10
CPCY02T10/44F02D13/0265F02D41/402F02D41/3041F02D41/1462F02P15/08Y02T10/46F02D2250/36F02P5/1508Y02T10/40
Inventor N·维尔穆思P·M·纳特H·允
Owner GM GLOBAL TECH OPERATIONS LLC
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