Anti-knocking in internal combustion engine

A system for controlling knocking in an internal combustion engine, comprising:

• a knock sensor for outputting a signal in response to the vibrations in said engine;
• means for deriving a knock magnitude value from the output signal of said knock sensor generated within a predetermined engine rotational angle at an interval thereby obtaining a plurality of knock magnitude values, said knock magnitude value corresponding to the magnitude of a knock component of said output signal of said knock sensor;
• means for detecting the presence of knocking by comparing said knock magnitude value with a reference;
• means for determining a pattern of distribution of said plurality of said knock magnitude values on the basis of the results of comparison between the frequency that said knock magnitude value exceeds an upper threshold value and the frequency that the knock magnitude value goes below a lower threshold value;
• means for detecting a knocking condition of said engine in accordance with the determined distribution pattern;
• means for correcting said reference in accordance with the detected knocking condition;
• and
• means for controlling said engine to prevent the knocking in response to the detection of knocking made by comparing said knock magnitude value with the corrected reference.

A system for controlling knocking in an internal combustion engine, comprising:

• a knock sensor for outputting a signal in response to the vibrations in said engine;
• means for deriving a knock magnitude value from the output signal of said knock sensor generated within a predetermined engine rotational angle at an interval thereby obtaing a plurality of knock magnitude values, said knock magnitude value corresponding to the magnitude of a knock component of said output signal of said knock sensor;
• means for detecting the presence of knocking by comparing said knock magnitude value with a reference;
• means for determining a pattern of distribution of said plurality of said knock magnitude values on the basis of the results of comparison between the frequency that said knock magnitude value exceeds an upper threshold value and the frequency that the knock magnitude value goes below a lower threshold value;
• means for detecting a knocking condition of said engine in accordance with the determined distribution pattern;
• means for controlling said engine to prevent the knocking in response to the detection of knocking made by comparing said knock magnitude value with the reference;
• and
• means for limiting the range of the engine control in accordance with the detected knocking condition.

A system for controlling knocking in an internal combustion engine, comprising:

• a knock sensor for outputting a signal in response to the vibrations in said engine;
• means for deriving a knock magnitude value from the output signal of said knock sensor generated within a predetermined engine rotational angle at an interval thereby obtaing a plurality of knock magnitude values, said knock magnitude value corresponding to the magnitude of a knock component of said output signal of said knock sensor;
• means for detecting the presence of knocking by comparing said knock magnitude value with a reference;
• means for detecting the frequency of knock generation;
• means for determining a condition of knocking on the basis of a pattern of distribution of said plurality of said knock magnitude values;
• means for correcting said reference on the basis of the frequency of knock generation and the determined knocking condition;
• and
• means for controlling said engine to prevent the knocking in accordance with the frequency of knock generation.

A system for controlling knocking in an internal combustion engine, comprising:

• a knock sensor for outputting a signal in response to the vibrations in said engine;
• means for deriving a knock magnitude value from the output signal of said knock sensor generated within a predetermined engine rotational angle at an interval thereby obtaining a plurality of knock magnitude values, said knock magnitude value corresponding to the magnitude of a knock component of said output signal of said knock sensor;
• means for detecting the presence of knocking by comparing said knock magnitude value with a reference;
• means for controlling said engine to prevent the knocking in accordance with the detection of the knocking;
• means for determining a condition of knocking on the basis of a pattern of distribution of said plurality of said knock magnitude values;
• means for correcting a knock control factor in accordance with the determined knocking condition;
• means for detecting the variation of the correction amount of said engine control factor;
• and
• means for correcting said reference on the basis of the variation of the correction amount and the determined knocking condition.

An apparatus for detecting knocking in an internal combustion engine, comprising:

• a knock sensor for outputting a signal in response to the vibrations in said engine;
• means for deriving a knock magnitude value from output signal of said knock sensor generated within a predetermined engine rotational angle at an interval thereby obtaing a plurality of knock magnitude values, said knock magnitude value corresponding to the magnitude of a knock component of said output signal of said knock sensor;
• means for determining a pattern of distribution of said plurality of said knock magnitude values on the basis of the results of comparison between the frequency that said knock magnitude value exceeds an upper threshold value and the frequency that the knock magnitude value goes below a lower threshold value;
• and
• means for detecting a knocking condition of said engine in accordance with the determined distribution pattern.