Misfire detecting apparatus for an internal combustion engine and a method for detecting misfires

An apparatus for detecting a misfire of an internal combustion engine comprising a controller that:

• determines a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• counts a total number of rotations of the internal combustion engine;
• detects a misfire of the internal combustion engine;
• calculates a rate of misfire using data from detecting said misfire, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• sets a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• and
• determines an abnormal condition of the internal combustion engine when said calculated rate of misfire is greater than the set basic rate of misfire;
• wherein said controller determines the abnormal condition of the internal combustion engine by a coolant temperature and an intake air temperature of the internal combustion engine.

An apparatus for detecting a misfire of an internal combustion engine comprising a controller that:

• determines a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• counts a total number of rotations of the internal combustion engine;
• detects a misfire of the internal combustion engine;
• calculates a rate of misfire using data from detecting said misfire, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• sets a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• determines an abnormal condition of the internal combustion engine when said calculated rate of misfire is greater than the set basic rate of misfire;
• and
• warns of an abnormality of the internal combustion engine when said abnormal condition of the internal combustion engine is determined;
• wherein said controller sets the basic rate of misfire when the internal combustion engine starts in a normal condition lower than a basic rate of misfire when the internal combustion engine starts in a high temperature condition.

An apparatus for detecting a misfire of an internal combustion engine comprising a controller that:

• determines a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• counts a total number of rotations of the internal combustion engine;
• detects a misfire of the internal combustion engine;
• calculates a rate of misfire using data from detecting said misfire, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• sets a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• and
• determines an abnormal condition of the internal combustion engine when said calculated rate of misfire is greater than the set basic rate of misfire;
• wherein said controller varies the basic rate of misfire in response to the total number of rotations.

An apparatus for detecting a misfire of an internal combustion engine comprising a controller that:

• determines a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• counts a total number of rotations of the internal combustion engine;
• detects a misfire of the internal combustion engine;
• calculates a rate of misfire using data from detecting said misfire, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• sets a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• and
• determines an abnormal condition of the internal combustion engine when said calculated rate of misfire is greater than the set basic rate of misfire;
• wherein said controller varies the basic rate of misfire in response to a time elapsed after the internal combustion engine starts.

An apparatus for detecting a misfire of an internal combustion engine comprising a controller that:

• determines a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• counts a total number of rotations of the internal combustion engine;
• detects a misfire of the internal combustion engine;
• calculates a rate of misfire using data from detecting said misfire, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• sets a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• and
• determines an abnormal condition of the internal combustion engine when said calculated rate of misfire is greater than the set basic rate of misfire;
• wherein said controller sets the basic rate of misfire when the total number of rotations is small after the internal combustion engine starts higher than a basic rate of misfire when the total number of rotations is large after the internal combustion engine starts.

An apparatus for detecting a misfire of an internal combustion engine comprising a controller that:

• determines a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• counts a total number of rotations of the internal combustion engine;
• detects a misfire of the internal combustion engine;
• calculates a rate of misfire using data from detecting said misfire, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• sets a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• and
• determines an abnormal condition of the internal combustion engine when said calculated rate of misfire is greater than the set basic rate of misfire;
• wherein said controller sets the basic rate of misfire when a elapsed time is short after the internal combustion engine starts higher than a basic rate of misfire when the elapsed time is long after the internal combustion engine starts.

A method for detecting a misfire of an internal combustion engine, comprising the steps of:

• determining a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• detecting a misfire of the internal combustion engine;
• counting a total number of rotations of the internal combustion engine;
• calculating a rate of misfire using data from said misfire detector, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• setting a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• determining an abnormal condition of the internal combustion engine when said rate of misfire is greater than the basic rate of misfire;
• wherein said determining step comprises the step of:
• determining the abnormal condition of the internal combustion engine by a coolant temperature or an intake air temperature of the internal combustion engine.

A method for detecting a misfire of an internal combustion engine, comprising the steps of:

• determining a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• detecting a misfire of the internal combustion engine;
• counting a total number of rotations of the internal combustion engine;
• calculating a rate of misfire using data from said misfire detector, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• setting a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• determining an abnormal condition of the internal combustion engine when said rate of misfire is greater than the basic rate of misfire;
• wherein said determining step comprises the step of:
• determining the abnormal condition of the internal combustion engine by a coolant temperature and an intake air temperature of the internal combustion engine.

A method for detecting a misfire of an internal combustion engine, comprising the steps of:

• determining a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• detecting a misfire of the internal combustion engine;
• counting a total number of rotations of the internal combustion engine;
• calculating a rate of misfire using data from said misfire detector, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• setting a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• determining an abnormal condition of the internal combustion engine when said rate of misfire is greater than the basic rate of misfire;
• wherein said setting step comprises the step of:
• setting a low value for the basic rate of misfire when the internal combustion engine starts in a normal condition and setting a high value for the basis rate of misfire when the internal combustion engine starts in a high temperature condition.

A method for detecting a misfire of an internal combustion engine, comprising the steps of:

• determining a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• detecting a misfire of the internal combustion engine;
• counting a total number of rotations of the internal combustion engine;
• calculating a rate of misfire using data from said misfire detector, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• setting a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• determining an abnormal condition of the internal combustion engine when said rate of misfire is greater than the basic rate of misfire;
• wherein said setting step comprises the step of:
• varying the basic rate of misfire in response to the total number of rotations.

A method for detecting a misfire of an internal combustion engine, comprising the steps of:

• determining a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• detecting a misfire of the internal combustion engine;
• counting a total number of rotations of the internal combustion engine;
• calculating a rate of misfire using data from said misfire detector, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• setting a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• determining an abnormal condition of the internal combustion engine when said rate of misfire is greater than the basic rate of misfire;
• wherein said setting step comprises the step of:
• varying the basic rate of misfire in response to a time elapsed after the internal combustion engine starts.

A method for detecting a misfire of an internal combustion engine, comprising the steps of:

• determining a starting condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• detecting a misfire of the internal combustion engine;
• counting a total number of rotations of the internal combustion engine;
• calculating a rate of misfire using data from said misfire detector, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• setting a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• determining an abnormal condition of the internal combustion engine when said rate of misfire is greater than the basic rate of misfire;
• wherein said setting step comprises the step of:
• setting a high value for the basic rate of misfire when the total number of rotations is small after the internal combustion engine starts and setting a low value when the total number of rotations is large after the internal combustion engine starts.

A method for detecting a misfire of an internal combustion engine, comprising the steps of:

• determining a staring condition of the internal combustion engine, the starting condition is a condition of the internal combustion engine when the internal combustion engine is initially started;
• detecting a misfire of the internal combustion engine;
• counting a total number of rotations of the internal combustion engine;
• calculating a rate of misfire using data from said misfire detector, the rate of misfire being a number of misfires per a predetermined total number of rotations;
• setting a basic rate of misfire in response to the determined starting condition of the internal combustion engine;
• determining an abnormal condition of the internal combustion engine when said rate of misfire is greater than the basic rate of misfire;
• wherein said setting step comprises the step of:
• setting a high value for the basic rate of misfire whena elapsed time is short after the internal combustion engine starts and setting a low value when the elapsed time is long after the internal combustion engine starts.