Patents by Inventor Maurizio Di Meglio
Maurizio Di Meglio has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 8131450Abstract: 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 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 one cylinder of the engine. In practice, the learning machine extracts characteristic parameters of the waveform of the pressure and as a function of a certain number of them generates the sensing signal.Type: GrantFiled: May 17, 2011Date of Patent: March 6, 2012Assignee: STMicroelectronics S.R.L.Inventors: Nicola Cesario, Paolo Amato, Maurizio Di Meglio, Francesco Pirozzi, Giovanni Moselli, Ferdinando Taglialatela-Scafati, Francesco Carpentieri
-
Publication number: 20110218727Abstract: 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 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 one cylinder of the engine. In practice, the learning machine extracts characteristic parameters of the waveform of the pressure and as a function of a certain number of them generates the sensing signal.Type: ApplicationFiled: May 17, 2011Publication date: September 8, 2011Applicant: STMICROELECTRONICS S.R.L.Inventors: Nicola Cesario, Paolo Amato, Maurizio Di Meglio, Francesco Pirozzi, Giovanni Moselli, Ferdinando Taglialatela-Scafati, Francesco Carpentieri
-
Patent number: 7962272Abstract: 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 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 one cylinder of the engine. In practice, the learning machine extracts characteristic parameters of the waveform of the pressure and as a function of a certain number of them generates the sensing signal.Type: GrantFiled: September 2, 2008Date of Patent: June 14, 2011Assignee: STMicroelectronics S.R.L.Inventors: Nicola Cesario, Paolo Amato, Maurizio Di Meglio, Francesco Pirozzi, Giovanni Moselli, Ferdinando Taglialatela-Scafati, Francesco Carpentieri
-
Patent number: 7791304Abstract: A method for determining duty-cycles of respective pulse width modulated (PWM), space vector modulated (SVM) control signals of an inverter, may include storing values of the duty-cycles as a function of a position of the multi-phase electric load in a look-up table. The method also may include determining a phasor angle representing applied sinusoidal voltages. The method also may include determining the duty-cycles as a function of the angle, and storing, in the look-up table, values of two pre-established waveforms relative to at least one duty-cycle as a function of the angle in at least two 60° degree angular sectors, by at least, identifying which of six 60° angular sectors the angle belongs, calculating a difference between the angle and an angular sector lower bound, and generating values as a function of the identified angular sector of the difference and the two pre-established waveforms stored in the look-up table.Type: GrantFiled: January 16, 2008Date of Patent: September 7, 2010Assignee: STMicroelectronics S.R.L.Inventors: Francesco Pirozzi, Maurizio Di Meglio, Stefano Baratto
-
Patent number: 7714571Abstract: A method estimates variations of position of the rotor of a motor having a plurality of uniformly spaced sensors that generate a position pulse at every rotation by a pre-established angle of the rotor. The method may include generating a first clock signal at a first frequency, generating a second clock signal at a second frequency multiple than the first frequency by a first factor, in each interval between two consecutive position pulses, counting the number of pulses of the first clock signal comprised in the interval, counting the number of pulses of the second clock signal comprised in the interval. The method may also include that each time the number of counted pulses of the second clock reaches the number of pulses of the first clock counted in an interval that precedes the currently considered interval, signaling that the position of the rotor has varied of an angle equal to the ratio between the pre-established angle and the factor.Type: GrantFiled: March 22, 2007Date of Patent: May 11, 2010Assignee: STMicroelectronics S.R.L.Inventors: Francesco Pirozzi, Maurizio Di Meglio, Stefano Baratto
-
Patent number: 7659685Abstract: A method for estimating the state of a system, as well as an extended Kalman filter (EKF), allows nonlinear mathematical models to be used for describing the system. Accurate precision is provided since the method is based on an EKF technique while using a filter that implements a first degree Stirling approximation formula. The method may be used for estimating position and speed of a brushless motor, and may be implemented in a relative device. Such a device may be introduced in a control loop of a brushless motor of a power steering system for a vehicle to provide a countering torque on the steering wheel based on speed of the vehicle and a steering angle of the vehicle.Type: GrantFiled: August 2, 2007Date of Patent: February 9, 2010Assignee: STMicroelectronics S.R.L.Inventors: Nicola Cesario, Stefano Baratto, Maurizio Di Meglio
-
Publication number: 20090033259Abstract: A method for estimating the state of a system, as well as an extended Kalman filter (EKF), allows nonlinear mathematical models to be used for describing the system. Accurate precision is provided since the method is based on an EKF technique while using a filter that implements a first degree Stirling approximation formula. The method may be used for estimating position and speed of a brushless motor, and may be implemented in a relative device. Such a device may be introduced in a control loop of a brushless motor of a power steering system for a vehicle to provide a countering torque on the steering wheel based on speed of the vehicle and a steering angle of the vehicle.Type: ApplicationFiled: August 2, 2007Publication date: February 5, 2009Applicant: STMicroelectronics S.r.I.Inventors: Nicola Cesario, Stefano Baratto, Maurizio Di Meglio
-
Publication number: 20090005953Abstract: 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 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 one cylinder of the engine. In practice, the learning machine extracts characteristic parameters of the waveform of the pressure and as a function of a certain number of them generates the sensing signal.Type: ApplicationFiled: September 2, 2008Publication date: January 1, 2009Applicant: STMicroelectronics S.r.l.Inventors: Nicola Cesario, Paolo Amato, Maurizio Di Meglio, Francesco Pirozzi, Giovanni Moselli, Ferdinando Taglialatela -Scafati, Francesco Carpentieri
-
Patent number: 7440839Abstract: 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 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 one cylinder of the engine. In practice, the learning machine extracts characteristic parameters of the waveform of the pressure and as a function of a certain number of them generates the sensing signal.Type: GrantFiled: March 3, 2006Date of Patent: October 21, 2008Assignee: STMicroelectronics S.R.L.Inventors: Nicola Cesario, Paolo Amato, Maurizio Di Meglio, Francesco Pirozzi, Giovanni Moselli, Ferdinando Taglialatela-Scafati, Francesco Carpentieri
-
Publication number: 20080169780Abstract: A method for determining duty-cycles of respective pulse width modulated (PWM), space vector modulated (SVM) control signals of an inverter, may include storing values of the duty-cycles as a function of a position of the multi-phase electric load in a look-up table. The method also may include determining a phasor angle representing applied sinusoidal voltages. The method also may include determining the duty-cycles as a function of the angle, and storing, in the look-up table, values of two pre-established waveforms relative to at least one duty-cycle as a function of the angle in at least two 60° degree angular sectors, by at least, identifying which of six 60° angular sectors the angle belongs, calculating a difference between the angle and an angular sector lower bound, and generating values as a function of the identified angular sector of the difference and the two pre-established waveforms stored in the look-up table.Type: ApplicationFiled: January 16, 2008Publication date: July 17, 2008Applicant: STMicroelectronics S.r.l.Inventors: Francesco Pirozzi, Maurizio DI Meglio, Stefano Baratto
-
Publication number: 20070241741Abstract: A method estimates variations of position of the rotor of a motor having a plurality of uniformly spaced sensors that generate a position pulse at every rotation by a pre-established angle of the rotor. The method may include generating a first clock signal at a first frequency, generating a second clock signal at a second frequency multiple than the first frequency by a first factor, in each interval between two consecutive position pulses, counting the number of pulses of the first clock signal comprised in the interval, counting the number of pulses of the second clock signal comprised in the interval. The method may also include that each time the number of counted pulses of the second clock reaches the number of pulses of the first clock counted in an interval that precedes the currently considered interval, signaling that the position of the rotor has varied of an angle equal to the ratio between the pre-established angle and the factor.Type: ApplicationFiled: March 22, 2007Publication date: October 18, 2007Applicant: STMicroelectronics S.r.l.Inventors: Francesco Pirozzi, Maurizio Di Meglio, Stefano Baratto
-
Publication number: 20060212209Abstract: 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 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 one cylinder of the engine. In practice, the learning machine extracts characteristic parameters of the waveform of the pressure and as a function of a certain number of them generates the sensing signal.Type: ApplicationFiled: March 3, 2006Publication date: September 21, 2006Applicant: STMicroelectronics S.r.l.Inventors: Nicola Cesario, Paolo Amato, Maurizio Di Meglio, Francesco Pirozzi, Giovanni Moselli, Ferdinando Taglialatela-Scafati, Francesco Carpentieri