Abstract: The invention relates to a system for managing a reagent dispensing device in the exhaust line of an engine, said circuit including a tank (1), an injection means (3), a means for conditioning the reagent, sensors capable of determining the representative parameters of the condition of the dispensing circuit and of the reagent, and actuators for controlling the conditioning and injection means driven by a calculation unit based on the condition of the dispensing circuit and of the reagent and on the engine parameters determined by an engine control unit (5) characterised in that the calculation unit is integrated in the engine control unit (5) and in that the system includes an analog/digital interface (4) for processing the analog signals from the sensors (2) and the actuators (3, 7, 8, 9), provided in the vicinity of the tank (1) and connected to the engine control unit by a multiplexed digital link.

Abstract: The invention relates to an absorption air conditioner that comprises a desorber (100), a condenser, an evaporator and an absorber, wherein the absorbing fluid may consist of lithium bromide. The method comprises the following steps: calculating the concentration of the absorbing fluid solution at the outlet of the desorber (100); and comparing the calculated concentration with a predetermined critical value and, if the calculated concentration gets closer to the predetermined critical value, increasing the charge loss in the duct (20) connecting the desorber (100) to the condenser, which interrupts the condensation in the condenser and results in a pressure increase in the desorber that stops the desorption and in a concentration increase, the charge loss being on the other hand reduced for resuming the desorption when the calculated concentration deviates from the predetermined critical value. The invention can be used in automobiles and absorption air-conditioners.

Abstract: The invention relates to a system for estimating at least one characteristic of a motor vehicle suspension, whereby said suspension or each suspension connects a motor vehicle wheel to the body shell thereof. The inventive system comprises means (12, 14) for acquiring vertical accelerations experienced by the wheel and body shell in a reference system of the vehicle and means (26) for calculating the at least one characteristic of the suspension as a function of the vertical accelerations acquired from the wheel and the body shell.

Abstract: The invention relates to a method for starting an internal combustion engine associated with a starter for driving the engine when starting the latter and to means for adapting the amount of injected fuel. According to the invention, the method comprises the following steps: during a first start operation, counting the number of revolutions (PMH) of the engine when it is driven by the starter; during a second starting operation following the first operation, adapting the amount (Q) of injected fuel based on the number of revolutions (PHM) counted during the first starting operation.

Abstract: The invention essentially concerns a method for fast starting of a hybrid vehicle. Said method uses a power transmission device (1.1) comprising a traction chain consisting of a heat engine (2), a clutch (3), an electrical machine (4), and wheels (6). The invention is characterized in that said method, in order to rapidly accelerate the vehicle when it is stopped, consists in starting the heat engine (2) concurrently with the actuation of the electrical machine, using a starting system (7) mechanically independent of the electrical machine (4).

Abstract: System for controlling the operation of a motor vehicle diesel engine in which the supply of fuel to the cylinders is controlled as a function of the pressure of a reference cylinder acquired and a predetermined desired fuel supply value for each cylinder, the supply of fuel to the reference cylinder is slaved to its desired supply value as a function of the pressure acquired, the drive shaft rotation speed generated by the displacement of the piston of the reference cylinder and the drive shaft rotation speed generated by the displacement of the piston of at least one other cylinder are acquired, and the supply of fuel to this at least one other cylinder is actuated as a function of the speeds acquired by slaving the drive shaft rotation speed related to the at least one other cylinder to the drive shaft rotation speed related to the reference cylinder.

Abstract: The inventive system comprises means (10) for determining the vehicle running mode, means (11) for determining the mass of elementary carbon exhausted by the engine according said running mode, means (15) for accumulating said elementary masses during the engine operation and obtaining a total mass thereof, means (18) for calculating the volume of ash from engine lubrication oil, means (20) for calculating the volume of ash from engine feed fuel, means (21) for calculating the effective volume of the depollution means on the basis of the total volume of the means thereof as they are new or cleaned, the already calculated volume of ash and means for calculating the degree of soot loading of the depollution means on the basis of the total mass, the effective volume and the maximum density of deposits on the depollution means.

Abstract: The invention relates to, in essence, a switching device (10, 11) for a motor vehicle. This switching device comprises two idler gears (17, 18) and a claw (14). This claw (14) assures, by displacement, a selective connection of a drive shaft (9) to one of the two idler gears (17, 18). According to the invention, the claw (14) comprises axial protrusions (65, 66) for simultaneously connecting it to the two idler gears (17, 18). To this end, the gears (17, 18) each have axial projections (67, 68). The protrusions (65, 66) are designed for entering the spaces made between the projections (67, 68). The inventive switching device (10, 11) is preferably used with a hybrid transmission device (1).

Abstract: The inventive system for assisting in the regeneration of depollution means (1) which is integrated in the exhaust means (3) of a diesel engine (4), wherein the engine (4) is associated with a common rail supplying means (7, 8) for injecting fuel into cylinders thereof using at least one post-injection and for carrying out at least two regeneration strategies by isotorque modifying the parameters of the engine operation control, wherein the first regeneration strategy comprises a first level strategy and a second level strategy and the second regeneration strategy comprising the first level strategies and a sequence alternating the second and second over-calibrated level strategies, thereby making it possible to obtain different thermal levels in the line.

Abstract: The invention relates to a method for starting an internal combustion engine associated with means for adapting, during an engine start operation, an amount of fuel injected based on an estimation of the volatility (PVR) of the fuel based on the comparison between a gradient of the engine speed measured upon a preceding start operation and a reference gradient (110) corresponding to a predetermined fuel, characterised by the step (111) of correcting the reference gradient based on a change (?CMF) in the engine friction torque.

Abstract: The invention relates to a method for controlling the coupling and the decoupling of the first motor and of the second motor of a parallel hybrid motive power group comprising a first motor (11) driving an input shaft (4) at the entrance of a gear box (15), a second motor (12) and a coupling/decoupling means (13) of the second motor and of the first motor, maneuverable between an open position and a closed position, for enabling a change with regard to the gearbox when the motor group operates in hybrid mode, according to which the motive power group is controlled for decoupling the second motor and the first motor then changing the ratio of the gear box, and recoupling the second motor and the first motor.

Abstract: The invention concerns a system for assisting regeneration of pollution management means (1) associated with oxidation catalyst forming means (2) implementing an oxygen storage capacity (OSC) function, and integrated in an exhaust line of a motor vehicle diesel engine (4), wherein the engine is associated with common ramp means (7) supplying fuel to the cylinders thereof. The invention is characterized in that it comprises means (8) for determining the frequency of the pollution management means regeneration and for comparing same to predetermined threshold values (10), to control the engine (4) in a first lean mixture regeneration operating mode (11) for frequencies less than the threshold values or in a second regeneration operating mode implementing engine operating sequences alternating rich mixture and lean mixture operating phases (12) for frequencies more than the threshold values.

Abstract: The invention relates to a method for controlling a coupling device between an input shaft driven by a motor and an output shaft that can transmit a maximum torque according to the position of an actuator of the coupling device 5 complying with a law of behavior of the coupling means according to which: a set value (Cemb,cons) of maximum torque to be transmitted is defined; the actual position (Xemb,mes) of the actuator of the coupling device is measured; a set value (Xemb,cons) is determined for actuating the coupling device and is sent to the actuator of the coupling device, while using a law of behavior of the coupling means obtained by interpolation between a first law of reference of behavior of the coupling means and at least one second law of reference of behavior of the coupling means, and; an auto-adaptation of the law of behavior of the coupling means is carried out for taking into consideration its evolution resulting from the use.

Abstract: Bipolar plate for a fuel cell, of the type comprising a cathode bipolar half-plate and an anode bipolar half-plate which are secured to each other, each bipolar half-plate (1) being constituted by a plate which comprises, in the central portion thereof, an active zone (2) and, at the peripheral portion thereof, a plurality of cut-outs (5) which are intended to constitute at least two oxidant units, at least two fuel units and at least two heat-exchange fluid units, at least one bipolar half-plate (1) comprising at least one connection between a peripheral cut-out (5) and the active zone (2), and comprising, at the periphery thereof, at least one hollow housing (140) which is intended to receive a connector (141) for electrical measurement.

Abstract: An arrangement of a stress transducer (8) mountable on one arm (31) of welding pliers, wherein an insert (10) is positioned between the arm (31) of the pliers and the stress transducer (8). A method for mounting said stress transducer is also provided.

Abstract: The invention relates to a fuel cell bipolar plate (22) comprising at least one ridge (47, 23a, 33a, 40a, 27a, 35a, 41a, 23a) on at least one of the faces (51) thereof, such as seal at least one fluid circuit in the cell from among the oxidant, fuel and coolant inlet circuits and the oxidant, fuel and coolant outlet circuits, said circuits being formed by stacking openings which are provided in the plate (22) and which form an inlet and an outlet for the oxidant and the fuel (33, 40, 35, 41) respectively and openings which form an inlet and an outlet for the coolant (23, 27) respectively during the assembly of the constituent cells (1) of the fuel cell.

Abstract: The invention concerns a system for assisting regeneration of pollution management means (1) associated with oxidation catalyst forming means implementing an oxygen storage capacity (OSC) function, and integrated in an exhaust line (3) of a motor vehicle diesel engine (4), wherein the engine is associated with common ramp means (7) supplying fuel to the cylinders thereof. The invention is characterized in that it comprises means (8) for determining the number of incomplete regeneration processes of the pollution management means and for comparing same to predetermined threshold values (10) to control the engine (4) in a first lean mixture regeneration operating mode (11) for a number less than the threshold values or in a second regeneration operating mode of engine operation sequences alternating rich mixture and lean mixture operating phases (12) for a number greater than the threshold values.

Abstract: In this method, during the same operating cycle of the cylinder, the following phases are carried out: an opening phase at the exhaust (OE-OF); a first opening phase at the intake (OA1-FA1); a second opening phase at the intake (OA2-FA2); a fuel injection phase (OI-FI) and a combustion phase. The exhaust closing time (FE) is between the first intake opening time (OA1) and the second intake opening time (OA2). The invention also relates to an internal-combustion engine having a cylinder which operates in accordance with such a method, and a motor vehicle provided with such an engine.

Abstract: The invention mainly concerns a fuel cell seal (52) designed to be affixed on a bipolar plate (22) in the form of a membrane whereof the profile corresponds approximately to the peripheral frame (50) of the bipolar plate (22) and comprising a central opening (66) coinciding approximately with the central zone (46) dispensing the reagents of the bipolar plate (22). The invention also concerns a fuel cell comprising an electrode membrane assembly (70) which includes in particular an active region (74), which is the site of anode and cathode reactions, and a peripheral frame (75) and which is sandwiched between two bipolar plates (22) whereon is affixed the inventive seal (52).

Abstract: The invention concerns a monopolar fuel cell endplate (4) of the type with proton exchanging membrane consisting of a cathode or anode monopolar half-plate (41) attached to a closure plate (42). The monopolar half-plate comprises, in its central part, a cathode or anode active region (411), and, at its periphery, at least two oxidant boxes, if the monopolar half-plate is cathodic, or fuel boxes, if the monopolar half-plate is anodic. Each oxidant or fuel box comprises at least one channel (414) emerging outside the active region (411) to enable oxidant or fuel to be circulated outside the monopolar plate on the monopolar plate side, the oxidant or fuel boxes not comprising an opening emerging into the central region of the closure plate, such that the central part of said closure plate is not swept either with fuel or with oxidant.