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Method for producing an internal combustion engine operating cycle synchronization signal

A technology for internal combustion engines and engine operation, applied in engine control, machines/engines, mechanical equipment, etc., can solve problems such as increasing pollutant emissions, affecting operation, and weakening engine combustion

Inactive Publication Date: 2011-01-19
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, the invention requires weakening of the engine's combustion, which affects its operation and increases pollutant emissions

Method used

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  • Method for producing an internal combustion engine operating cycle synchronization signal
  • Method for producing an internal combustion engine operating cycle synchronization signal
  • Method for producing an internal combustion engine operating cycle synchronization signal

Examples

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Embodiment Construction

[0026] Throughout the specification, the same reference numerals denote functionally identical or similar components, regardless of variations of the embodiments of the invention.

[0027] Referring to the drawings, there is shown an engine control system which implements the method for generating the synchronization signal which is the object of the present invention. Only the parts necessary for understanding the invention are shown. Also, in this example, the synchronization signal may be used to control the injection system, although the application of the signal is not limited thereto, and the synchronization signal could be used to control other engine components or methods.

[0028] A four-stroke internal combustion engine 1 for a motor vehicle comprises three cylinders (C1, C2, C3), each cylinder comprising an electronically controlled multi-point fuel injection device, through which each cylinder is supplied from a specific electronic injector 5 fuel.

[0029] The o...

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Abstract

The invention relates to a method for producing a synchronization signal (NOCYL) for a four-stroke internal combustion engine with an odd number of cylinders (C1, C2, C3) using an electronic control system (7), the synchronization signal (NOCYL) making it possible to identify a predetermined instant in the thermodynamic cycle of each of the cylinders of the engine and to determine, from a TDC signal identifying a determined position of each cylinder, and from a signal (Cg, Bn) representing a parameter indicative of the crankshaft dynamics generated by each of the combustions, both generated from information from an engine crankshaft position sensor (22). According to the invention, the method involves the following steps: operating the engine for a given period with ignition in the cylinders at each cylinder turn, so as to produce systematic combustion of the injected fuel; calculating the representative signal (Cg, Bn); comparing the signal (Cg, Bn) against a reference value; resetting the synchronization signal (NOCYL) if the analysis of the comparison indicates that the synchronization signal is incorrectly timed.

Description

technical field [0001] The invention relates to a method of generating synchronization signals characterizing the course of the operating cycle of a four-stroke internal combustion engine, said internal combustion engine being a multi-cylinder engine, wherein, as in the case of an odd-numbered cylinder four-stroke engine, during the rotational movement of the crankshaft, the The expansion phase occurs at different angular positions during which combustion occurs. [0002] The invention relates more particularly to a method for generating a signal that can be used to identify a predetermined moment of a cycle, for example the transition through intake top dead center or just past intake bottom dead center. Background technique [0003] Engine performance levels and emission control of pollutants are associated with various methods used to control engine operation. These methods - such as fuel injection or ignition - require precise information of the thermodynamic cycles wit...

Claims

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Application Information

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IPC IPC(8): F02D41/06F02D41/34
CPCF02D41/009F02D2041/0092F02D2200/1012F02D41/062F02D2200/1004
Inventor G·巴勒斯特罗斯
Owner RENAULT SA
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