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Engine knock control for turbocharged engines

An engine system and control system technology, applied in the direction of engine control, general control system, control/regulation system, etc., can solve the problems of increased ignition delay, consumption, etc.

Active Publication Date: 2008-12-10
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the ignition delay is continuously increased until the ignition delay authority is fully consumed

Method used

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  • Engine knock control for turbocharged engines
  • Engine knock control for turbocharged engines
  • Engine knock control for turbocharged engines

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Embodiment Construction

[0017] The following description of the preferred embodiments is merely exemplary in nature and not intended to limit the invention, its application or uses. For purposes of clarity, the same reference numbers will be used in the drawings to identify similar elements. As used herein, the term module refers to an application-specific integrated circuit, an electronic circuit, a processor (shared, dedicated, or grouped) and memory, combinational logic circuits, and / or providing the functionality described other appropriate components.

[0018] now refer to figure 1 , which illustrates an exemplary engine system 10 . Engine system 10 includes an engine 12 having an intake manifold 14 and an exhaust manifold 16 . The air is mixed with fuel, and the air / fuel mixture is combusted within cylinders 18 of engine 12 . Although figure 1 The exemplary engine shown includes four cylinders, it is contemplated that the engine may include more or fewer cylinders. For example, engines ha...

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Abstract

An engine knock control system for an engine having a turbocharger includes a first module that determines octane scalars indicative of an engine knock propensity for each cylinder of the engine system and a second module that determines a cylinder air mass limit based on the octane scalars. A third module limits a boost output of the turbocharger based on the cylinder air mass limit.

Description

technical field [0001] The present invention relates to internal combustion engines, and more particularly to knock control systems in turbocharged engines. Background technique [0002] Internal combustion engines combust a mixture of air and fuel within cylinders to produce drive torque. More specifically, the combustion event reciprocally drives pistons, which in turn drive a crankshaft to provide torque output from the engine. The air-fuel mixture is ignited or ignited at the desired crank angle. In some cases, however, the air-fuel mixture auto-ignites in the cylinder ahead of the flame front, causing unwanted engine knock. [0003] Accordingly, engine knock control systems have been developed for detecting and mitigating engine knock. One such engine knock control system is disclosed in US Patent No. 5,560,337, entitled Knock Control System Using Fuzzy Logic and issued October 1, 1996. This conventional system detects the propensity of a particular cylinder to igni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P5/152G05B13/02
CPCF02D23/00F02D35/027F02D41/0007F02D2200/0406F02D2200/0414F02P5/04Y02T10/12
Inventor D·J·巴布库克R·M·巴克曼E·里岑
Owner GM GLOBAL TECH OPERATIONS LLC