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Multiple injection blend for direct injected engines

An engine, fuel injection technology, used in combustion engines, engine controls, machines/engines, etc., to solve problems such as high hydrocarbon emissions and particulate matter

Inactive Publication Date: 2008-08-27
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the dual-injection mode of operation produces high hydrocarbon emissions and particulate matter

Method used

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  • Multiple injection blend for direct injected engines
  • Multiple injection blend for direct injected engines
  • Multiple injection blend for direct injected engines

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Embodiment Construction

[0017] The description that follows is merely exemplary in nature and does not limit the disclosure, its application, or uses in any way. For the sake of clarity, the same reference numerals are used in the drawings to denote the same elements. As used herein, the term module and / or device refers to an application-specific integrated circuit (ASIC), electronic circuit, processor (shared, dedicated, or group) and memory used to execute one or more software or firmware programs , a combinational logic circuit and / or other suitable components for realizing the described functions.

[0018] Referring now to FIG. 1 , an engine system 10 includes an engine 12 that combusts a mixture of air and fuel to produce drive torque. Air is drawn into the intake manifold 14 through a throttle valve 16 . A throttle valve 16 controls mass air flow into the intake manifold 14 . Air in the intake manifold 14 is distributed among a plurality of cylinders 18 . Although a single cylinder 18 is sh...

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Abstract

A fuel injection system for a direct fuel injection engine is provided. The system includes an injection mode module that selects a fuel injection mode to be one of a single injection mode and a dual injection mode during engine operation and a fuel injection command module that commands fuel injection events based on a crankshaft position, the fuel injection mode and a fuel percentage blending schedule.

Description

technical field [0001] The present invention relates to methods and systems for direct fuel injection 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] Controlling the amount of fuel and air supplied to each cylinder of a four-stroke internal combustion engine is very important to achieve its optimum performance. Proper intake and exhaust valve timing also provides better performance. A conventional engine includes a camshaft that regulates the timing of the valves. The rotation of the camshaft can be controlled to ensure proper timing of each valve. In addition, cam phasers can be used to vary the position of the camshaft relative to the crankshaft, which provides additional opportunities to correctly adjust the timing of each valve. [0004] The position of the injector in the engine and the control of fuel injection timing also have an...

Claims

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Application Information

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IPC IPC(8): F02D41/40F02D41/08
CPCF02B2075/125F02D2200/501Y02T10/44F02D41/402F02D41/3064Y02T10/123F02D41/009Y02T10/12Y02T10/40
Inventor J·M·格威德特J·T·施巴塔V·拉马潘S·R·史密斯M·J·卢奇多
Owner GM GLOBAL TECH OPERATIONS LLC
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