Patent application number | Description | Published |
20080210773 | Fuel Injection Device for Internal Combustion Engine - A fuel injection device for an internal combustion engine. The fuel injection device includes an injecting head integral with an end of a needle mobile in translation inside an injection housing supplied with high pressure fuel and having a seat for the injecting head, and a piezoelectric or magnetoresistive vibratory element capable, when energized, to act on the needle, maintained by a return spring, to cause the needle to vibrate, such that the injecting head co-operates with its seat to periodically open and close a passage for fuel injection. A controller controls movement of the needle in translation, countering the return spring, independent of the vibratory element. | 09-04-2008 |
20080309381 | Device for Controlling a High-Voltage Transistor, in Particular a Mos Transistor of a High-Voltage Radio-Frequency Generator for the Spark Ignition of an Internal Combustion Engine - A control device including: an input terminal for receiving a logic control signal; an output terminal for delivering an output control signal from the high-voltage MOS transistor; a first NMOS control transistor with low internal impedance, which is connected between ground and the output terminal and the gate of which is connected to the input terminal; and a second PMOS control transistor, which is connected between a supply terminal and the output terminal and the gate of which is connected to the input terminal by a bipolar transistor mounted to a common base, and which is current controlled at the emitter thereof by a capacitive connecting circuit. | 12-18-2008 |
20080315019 | Fuel Injecting Device and Method for Controlling Said Device - A fuel injecting device and method of controlling the fuel injection device. The fuel injection device includes a cylindrical body, a needle whose end includes with a head forming a valve on a seat supported by the end of the cylindrical body, an actuator made of an electroactive material, including a rod and that displaces the head such that the valve is opened, and a prestressing device holding the needle and a counterweight such that they are pressed against the rod opposite end. The needle extends coaxially to the cylindrical body in a form of a rigid bar and axially resonates when exposed to axial pulses at a determined excitation frequency by the actuator. | 12-25-2008 |
20090014554 | FUEL INJECTOR FOR AN INTERNAL COMBUSTION ENGINE - A fuel injector for an internal combustion engine, particularly of inwards or outwards opening needle injector type, includes an injector body, e.g., forming a nozzle ending in an injection office, a mechanism for closing off the injection orifice of the injector body, the closing-off mechanism including a vibrating pintle ending in a head for closing off the injection orifice, a return mechanism returning the closing-off to the position in which they close off the injection orifice, and a mechanism for setting the pintle and/or the nozzle into cyclic longitudinal vibration so as to open and close the injection orifice alternately. The fuel injector includes a selectively activatable mechanism immobilizing the pintle with respect to the body. | 01-15-2009 |
20090050123 | SPARK PLUG FOR AN INTERNAL COMBUSTION ENGINE - A spark plug for an internal combustion engine of a motor vehicle; the spark plug is embodied with a generally essentially long shape and includes: an essentially capacitive lower part including two coaxial electrodes, one of which is a central electrode, and the other a threaded shell for screwing in the spark plug on the engine; and an essentially inductive upper part including a central winding including a plurality of coils wound around a coaxial mandrel, an envelope, and an insulator inserted between the envelope and the winding. The essentially capacitive part and the essentially inductive part are mechanically interconnected as to enable transmission of a clamping couple applied to the envelope to the essentially capacitive lower part. The mandrel can be elastically deformed as to compensate effects of dilation of the insulator. | 02-26-2009 |
20090114179 | PLASMA SPARK PLUG FOR AN INTERNAL COMBUSTION ENGINE - An essentially-elongated spark plug for an internal combustion engine of a motor vehicle, including: an essentially-capacitive lower part including two coaxial electrodes; an essentially-inductive upper part including a central mandrel, a coaxial winding around the mandrel, and an external tubular casing that serves as electromagnetic armour; and an insulant disposed radially between the casing and the winding. The essentially-inductive upper part includes a second internal casing of electromagnetic armour, which is disposed radially between the insulant and the external casing. | 05-07-2009 |
20090146542 | RADIOFREQUENCY PLASMA SPARK PLUG - A radiofrequency plasma spark plug configured to equip a combustion chamber including: an annular shell with a main axis; a central electrode made of a conductive material, extending along the main axis and including an inner portion arranged inside the annular shell and an outer portion arranged outside the annular shell: an annular electrically insulating part extending at least about the inner portion of the central electrode so as to be interposed between the shell and the electrode, the insulating part only covering part of the outer portion of the central electrode. The insulating part includes an annular flange concealing the entire circular terminal surface of the shell relative to the uncovered part of the electrode. | 06-11-2009 |
20090309499 | OPTIMIZATION OF THE EXCITATION FREQUENCY OF A RESONATOR - A radio frequency plasma generator power supply, including: an interface that receives a request to determine an optimal control frequency; an output interface configured to be connected to a plasma generation resonator; a power supply module configured to apply a voltage at a set point frequency to the output interface, the voltage, depending on its frequency, selectively unable to allow generation of plasma of the resonator on receipt of a request during a phase optimizing power supply frequency of the generator and able to allow generation of plasma of the resonator during an operating phase; an interface that receives an electrical measurement of power supply of the resonator; a module that determines optimal control frequency, successively provides various set point frequencies to the power supply module on receipt of a request, and determines an optimal control frequency depending on electrical measurements received by the reception interface. | 12-17-2009 |
20090323249 | PSEUDOPERIODIC LOGIC SIGNAL GENERATOR - A generator of a pseudoperiodic logic signal of mean period T | 12-31-2009 |
20100187329 | FLUID INJECTION DEVICE - A fluid injection device having a main injection axis and including at least: a housing; an actuator axially mounted in the housing and including a stack with two axially opposed front faces and including at least one electro-active portion with an electro-active material; and a pre-stressing mechanism adapted for at least partially pre-stressing the stack. The pre-stressing mechanism includes at least a tightening clamp outside the stack and provided between the stack and the housing. | 07-29-2010 |
20100187999 | RADIOFREQUENCY PLASMA GENERATION DEVICE - A device including two plasma generation electrodes, a series resonator having a resonant frequency above 1 MHz and including a capacitor with two terminals, and an induction coil surrounded by a screen, the capacitor and the coil being placed in series, the electrodes being connected to the respective terminals of the capacitor. The ratio of the spark plug to the radius of the screen is equal to 0.56. The device can optimize the Q-factor of such a device by adjusting the radius of the coil to that of the screen. | 07-29-2010 |
20100212631 | COMBUSTION ENGINE AND METHOD OF CONTROLLING A COMBUSTION ENGINE - An internal combustion engine including: a pulse current generator; at least one electrode including at least one tip; a mechanism controlling the electrical supply to the electrode by the generator; and a combustion chamber in which the tip of the electrode is positioned, the tip being separated from the inner wall of the chamber by a minimum separation distance. The current generator and the electrode are configured such that the power density generated while the electrode is being supplied is less than 10 | 08-26-2010 |
20100251995 | OPTIMIZED GENERATION OF A RADIOFREQUENCY IGNITION SPARK - A method for controlling a radio-frequency plasma generator including a supply circuit with a switch controlled by at least one control pulse train, for applying an intermediate voltage at a control frequency on an output to which is connected a resonator for generating a spark between two electrodes when a high voltage level is applied to the output. The method receives first and second measurement signals respectively representative of the operation of a combustion engine and of the type of spark generated; and real-time adjusts, based on the received measurement signals, at least one parameter selected from at least the intermediate voltage level, the control frequency, and the duration of the control train, to promote branching of the spark generated. | 10-07-2010 |
20100307455 | FLUID INJECTION DEVICE - The invention relates to an injector including a needle mounted in a nozzle and having an end defining a valve, the needle being connected at the other end to an actuator including first, second and third portions, the first and third portions being provided on either side of the second portion, the three portions being tightened together in order to form a block having two axially opposite limits, the first portion being connected with the needle at one of said limits, and an excitation means for vibrating the second portion according to setpoint period τ. According to the invention, the length between the two limits of the block is such that the propagation time T of the acoustic waves generated by the vibrations of the second portion of the actuator and running along that length meets the equation: T=n*[τ/2], where n is an integer positive multiplication coefficient different from zero. | 12-09-2010 |
20100313841 | CONTROL OF A PLURALITY OF PLUG COILS VIA A SINGLE POWER STAGE - A plasma generating device including: a supply circuit including a switch controlled by a control signal for applying an intermediate voltage on an output of the control circuit at a frequency defined by the control signal; a plurality of plasma-generating plug coils arranged in parallel on the output via connectors, each connector being adapted to be removably connected to a corresponding plug coil and including a mechanism adapted to offset the resonance frequency of the plug coil so that each plug coil has a distinct resonance frequency; a control device of the supply circuit, that determines the control frequency from the resonance frequencies of the plug coils to selectively control the plug coils according to the control frequency used. | 12-16-2010 |
20110023827 | FLUID INJECTION DEVICE - An injector including a nozzle that includes an opening and a seat, a needle movably mounted in the nozzle and having an end defining a valve in a contact area with the seat, a mechanism for vibrating the valve, a first acoustic-impedance breaking area at a first distance from the valve along the nozzle, and another first acoustic-impedance breaking area at a second distance from the valve along the needle. Each of the first and second distances is such that the respective propagation time of acoustic waves along the distance is: T | 02-03-2011 |