System and method for diagnosing and calibrating internal combustion engines

A method for determining a predetermined operating condition of an internal combustion engine, the method comprising:

• storing in memory data corresponding to a volumetric efficiency table;
• determining a first assessed air mass value using data received from at least one hardware sensor and the volumetric efficiency table;
• measuring a cylinder pressure in at least one combustion chamber at a predetermined point in a combustion cycle;
• determining at least a first value for an operating parameter of the engine using the measured cylinder pressure;
• determining a second value for the operating parameter of the engine using data received from at least one engine sensor;
• and
• generating a predetermined signal if a difference between the first value and the second value has a predetermined relationship.

A method for determining a predetermined operating condition of an internal combustion engine, the method comprising:

• measuring a cylinder pressure in at least one combustion chamber, for at least one cylinder, at a predetermined point in a combustion cycle;
• inputting the measured cylinder pressure for the at least one cylinder into a neural network;
• determining from the neural network output, whether a predetermined condition exists in at least one cylinder;
• and
• adjusting a component of the at least one cylinder, if an abnormal condition has been detected.

A machine-readable storage medium having stored thereon machine executable instructions, the execution of said instructions adapted to implement a method for determining a predetermined operating condition of an internal combustion engine, the method comprising:

• measuring a cylinder pressure in at least one combustion chamber at a predetermined point in a combustion cycle;
• determining at least a first value for an operating parameter of the engine using the measured cylinder pressure;
• determining a second value for the operating parameter of the engine using data received from at least one engine sensor;
• and
• generating a predetermined signal if a difference between the first value and the second value has a predetermined relationship.

A machine-readable storage medium having stored thereon machine executable instructions, the execution of said instructions adapted to implement a method for determining a predetermined operating condition of an internal combustion engine, the method comprising:

• storing in memory data corresponding to a volumetric efficiency table;
• determining a first assessed air mass value using data received from at least one hardware sensor and the volumetric efficiency table;
• measuring a cylinder pressure in at least one combustion chamber at a predetermined point in a combustion cycle;
• determining at least a first value for an operating parameter of the engine using the measured cylinder pressure;
• determining a second value for the operating parameter of the engine using data received from at least one engine sensor;
• and
• generating a predetermined signal if a difference between the first value and the second value has a predetermined relationship.

A machine-readable storage medium having stored thereon machine executable instructions, the execution of said instructions adapted to implement a method for determining a predetermined operating condition of an internal combustion engine, the method comprising:

• measuring a cylinder pressure in at least one combustion chamber, for at least one cylinder, at a predetermined point in a combustion cycle;
• inputting the measured cylinder pressure for the at least one cylinder into a neural network;
• determining from the neural network output, whether a predetermined condition exists in at least one cylinder;
• and
• adjusting a component of the at least one cylinder, if an abnormal condition has been detected.

An apparatus for determining a predetermined operating condition of an internal combustion engine, the apparatus comprising:

• a module configured to measure a cylinder pressure in at least one combustion chamber at a predetermined point in a combustion cycle;
• a module configured to determine at least a first value for an operating parameter of the engine using the measured cylinder pressure;
• a module configured to determine a second value for the operating parameter of the engine using data received from at least one engine sensor;
• and
• a module configured to generate a predetermined signal if a difference between the first value and the second value has a predetermined relationship.

An apparatus for determining a predetermined operating condition of an internal combustion engine, the apparatus comprising:

• storing in memory data corresponding to a volumetric efficiency table;
• a module configured to determine a first assessed air mass value using data received from at least one hardware sensor and the volumetric efficiency table;
• a module configured to measure a cylinder pressure in at least one combustion chamber at a predetermined point in a combustion cycle;
• a module configured to determine at least a first value for an operating parameter of the engine using the measured cylinder pressure;
• a module configured to determine a second value for the operating parameter of the engine using data received from at least one engine sensor;
• and
• a module configured to generate a predetermined signal if a difference between the first value and the second value has a predetermined relationship.

An apparatus for determining a predetermined operating condition of an internal combustion engine, the apparatus comprising:

• a module configured to measure a cylinder pressure in at least one combustion chamber, for at least one cylinder, at a predetermined point in a combustion cycle;
• a module configured to input the measured cylinder pressure for the at least one cylinder into a neural network;
• a module configured to determine from the neural network output, whether a predetermined condition exists in at least one cylinder;
• and
• a module configured to adjust a component of the at least one cylinder, if an abnormal condition has been detected.