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公开(公告)号：US11371456B2
公开(公告)日：2022-06-28
申请号：US17257440
申请日：2019-07-10
发明人： Jean Cannavo , Thierry Bavois
IPC分类号： F02D41/20 , H02M1/00 , F02D41/18 , H02M3/157 , H03K17/082
摘要： Disclosed is a method for controlling a DC-DC voltage converter for current-driving at least one fuel injector of a motor vehicle internal combustion engine. The method notably includes the steps of determining a time referred to as the “recovery” time at which the output voltage crosses the predefined high voltage threshold, of determining a time referred to as the “drop” time, corresponding to the start of injection, at which the output voltage decreases below the predefined high voltage threshold, and of calculating the time elapsed between the recovery time and the drop time.
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公开(公告)号：US11459969B2
公开(公告)日：2022-10-04
申请号：US17286893
申请日：2019-10-22
发明人： Cedrick Biellmann , Thierry Bavois
摘要： Disclosed is a method for controlling a DC/DC voltage converter for controlling the current of at least one fuel injector of an internal combustion engine of a motor vehicle, the vehicle including a supply battery and the converter including a coil and a switch. The method includes the steps of measuring the value of the voltage delivered by the battery, of determining a threshold value of the current passing through the coil from the measured value of the voltage and from a predetermined curve of the current as a function of the voltage, and of actuating the opening of the switch when the current passing through the coil reaches the determined threshold value of the current in order to regulate the power of the converter.
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公开(公告)号：US11496040B2
公开(公告)日：2022-11-08
申请号：US17259060
申请日：2019-07-09
发明人： Jean Cannavo , Cedrick Biellmann , Thierry Bavois
摘要： Disclosed is a method for triggering the switching of a switching transistor of a quasi-resonant DC-to-DC voltage converter to the on state. The method includes the steps of phase-shifting the drain voltage of the transistor by a predetermined temporal phase-shift value that corresponds to the difference between the duration of a quarter of the period of the damped sinusoidal oscillation generated when the transistor is switched off and the period of time that elapses between the command to switch the transistor to the on state and the transistor actually conducting, and, when the phase-shifted voltage is equal to the reference voltage, triggering the command to switch the transistor to the on state such that the transistor starts conducting at the time when the value of the drain voltage is at a minimum.
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公开(公告)号：US11428182B2
公开(公告)日：2022-08-30
申请号：US17424354
申请日：2020-03-26
发明人： Thierry Bavois
摘要： Disclosed is a method for controlling a fuel injector provided with a solenoid for actuating a needle which opens the injector and with a spring for returning the needle to the closed position. The solenoid is supplied with power by a controller including a first potential and a second potential, a first diode and a second diode, a first transistor, a second and a third transistor which is controlled so as to generate various currents using the potentials.
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