公开(公告)号：EP1705352A1

公开(公告)日：2006-09-27

申请号：EP05425121.0

申请日：2005-03-04

Applicant: STMicroelectronics S.r.l.

Inventor： Cesario, Nicola ,  Amato, Paolo ,  Di Meglio, Maurizio ,  Pirozzi, Francesco ,  Moselli, Giovanni ,  Taglialatela, Ferdinando ,  Carpentieri, Francesco

IPC: F02D35/02 ,  F02D41/14

CPC classification number: F02D41/2454 ,  F02D35/023 ,  F02D41/1401 ,  F02D41/1404 ,  F02D41/1405 ,  F02D41/1458 ,  F02D41/187 ,  F02D2041/141 ,  G06K9/6223

Abstract: A method of sensing the air/fuel ratio in a combustion chamber of an internal combustion engine that may be easily implemented by a respective low-cost device is disclosed.
The device includes a pressure sensor and a learning machine that generates a sensing signal representing the air/fuel ratio by processing the waveform of the pressure in at least a cylinder of the engine. In practice, the learning machine extracts characteristic parameters of the waveform of the pressure and in function of a certain number of them generates the sensing signal.

Abstract translation: 公开了一种可以容易地由相应的低成本装置实现的内燃机的燃烧室中的空燃比的检测方法。 该装置包括压力传感器和学习机，其通过处理发动机的至少一个气缸中的压力波形来产生表示空气/燃料比的感测信号。 在实践中，学习机提取压力波形的特征参数，并且在一定数量的函数中产生感测信号。

公开(公告)号：EP1696218A1

公开(公告)日：2006-08-30

申请号：EP05425105.3

申请日：2005-02-25

Applicant: STMicroelectronics S.r.l.

Inventor： Taglialatela, Ferdinando ,  Moselli, Giovanni ,  Lavorgna, Mario

IPC: G01L23/22 ,  F02P5/152

CPC classification number: F02D35/023 ,  F02D35/027 ,  F02P5/152 ,  G01L23/225 ,  Y02T10/46

Abstract: A knocking presence evaluation circuit in an internal combustion engine having at least a pressure sensor (3) facing in combustion chamber for each cylinder comprised in the engine itself and suitable to detect a pressure signal ( Pr_Sign ). Advantageously, the circuit comprises:

a processing block (7), connected, in correspondence with an input terminal (IN4) of the knocking presence evaluation circuit (4), to the pressure sensor (3) and receiving therefrom the pressure signal ( Pr_Sign ), the processing block (7) performing a processing of the pressure signal ( Pr_Sign ) for insulating the oscillations and generating a derived pressure signal ( Fl_Pr_Sign );
an acquisition block (8), connected at input to the processing block (7) and receiving therefrom the derived pressure signal ( Fl_Pr_Sign ), the acquisition block (8) generating a first and a second measure signals ( Pul_Cnt, Pul_Dur ) respectively corresponding to a number and a total duration of digital pulses obtained from said derived pressure signal ( Fl_Pr_Sign ); and
a soft-computing block (9) connected at input to the acquisition block (8) and receiving therefrom the first and second measure signals ( Pul_Cnt, Pul_Dur ) and connected to an output signal (OUT4) of the knocking presence evaluation circuit (4) to which the output terminal supplies a knocking intensity index ( Knock_index ), calculated by soft-computing techniques, starting from the first and second measure signals ( Pul_Cnt, Pul_Dur ).

A knocking identification and control system associated with an internal combustion engine and a processing method of a pressure signal for the detection and the evaluation of a combustion phenomenon in an internal combustion engine are also described.

Abstract translation: 的爆震存在评估电路在内燃机具有至少一个压力传感器（3）在燃烧室面临在发动机本身包括每个汽缸和适合于检测的压力信号（Pr_Sign）。 有利地，该电路包括：处理块（7），连接，对应于到爆震存在评估电路（4）连接到压力传感器的输入端（IN4）（3）和从所述压力信号接收有（Pr_Sign） 中，处理块（7），用于绝缘振荡并产生衍生（Fl_Pr_Sign）的压力信号进行的压力信号（Pr_Sign）的处理; 获取块（8），在输入端连接到所述处理块（7）上，并从所导出的压力信号（Fl_Pr_Sign）接收那里，获取块（8）产生第一和第二测量信号（Pul_Cnt，Pul_Dur）分别对应于 一个数字和衍生自所述压力信号（Fl_Pr_Sign）获得的数字脉冲的总持续时间; 并在输入端连接到所述获取块（8）和从所述第一和第二测量信号（Pul_Cnt，Pul_Dur）接收存在并连接到设置在爆震存在评估电路的输出信号（OUT4）一个计算软嵌段（9）（4 ）到哪个输出端提供由软计算技术来计算，从第一和第二测量信号（Pul_Cnt，Pul_Dur）开始的爆震强度指数（Knock_index）。 因此描述了在内燃机和用于检测压力信号和的燃烧现象在内燃发动机的评价的处理方法相关的爆震识别和控制系统。