Abstract: The invention relates to a method for controlling a hybrid vehicle that comprises a traction chain with a propulsion unit (10) including a thermal engine (18) coupled to the vehicle wheels (14, 16) via a gearbox (22), an electric machine ME (40) that can be configured either as an electric motor for providing a traction torque to the vehicle or as a generator for supplying an electric current to an electric-energy storage means (50) via an electric network (52) of the vehicle, a coupling device (42) positioned between the electric machine and a driving shaft (48) coupled to the vehicle wheels (34, 36), and comprising a control input Ec so as to be switched either into a so-called coupling position providing a mechanical coupling between the electric machine (40) and the driving shaft (48), or into an uncoupling position interrupting the mechanical coupling between said electric machine and the driving shaft, at least one sensor (64, 66) supplying a value of a parameter (Vt, Dc) characteristic of the vehicle m

Abstract: The invention relates to an electric circuit for an automobile, that comprises a ground line (M), an onboard network (R) with a battery (1) connected to the network (R) and to the ground (M) by a branch (b1) comprising a switch (K1) and by a second branch (b2) including a switch (K2), an alternator (3) connected to the battery, a starter and consumer members (4) connected to said onboard network and to the ground. The circuit further includes a voltage holding device that comprises a bridge (b3) connecting the branch (b1) to the branch (b2) and a capacitor (2) connected to the bridge (b3) at a location between the third switch (K2) and the second branch (b2), and an internal supply device (8) that allows the current flow in the second branch (b2) only when recharging the capacitor (2).

Abstract: The invention relates to an internal combustion engine (1) that includes an inlet circuit (3) for oxidant air, an exhaust circuit (6), a compressor (4) having an input shaft (41), capable of increasing the air pressure in the inlet circuit when the input shaft thereof is rotated, an engine output shaft (21), a means for selective coupling (42) between the engine output shaft and the compressor input shaft, a Rankine cycle circuit (7) with an evaporator (71) in thermal contact with the exhaust circuit and provided with an expansion member (72) driven by the gas from the evaporator, characterised in that it further comprises a means for selective coupling (44) between the expansion member (72) and the input shaft (41) of the compressor.

Abstract: The invention relates to a method of heating a motor vehicle cabin by means of a circuit (20) for circulating a cooling fluid for cooling an engine (10) and including a pump (23), an air heater unit (22), and a heat exchanger (21) disposed in an exhaust system (15) that is also provided with a depollution assembly (16). The exhaust gas is directed towards the heat exchanger (21) or towards a bypass duct (18) downstream from the depollution assembly (16) as a function of engine operating conditions, of the outside temperature, of the heating temperature requested in the vehicle cabin, and of the temperature of the engine cooling fluid. The invention applies more particularly to direct injection diesel engines.

Abstract: A system for controlling the function of a diesel engine (1) in a motor vehicle having anti-pollution means (6, 7) includes an oxidation catalyst (6) and arranged in the exhaust system (3) of said engine (1). The catalyst (6) has at least one non-initialized state and one initialized state and the engine (1) has means (8) for supplying the engine cylinders with fuel with at least one injection during the recovery phase thereof. The system includes a single temperature sensor (18) downstream of the catalyst (6) and means (19) for controlling the supply means (8) by switching of the phase control and/or the quantity of fuel injected during the recovery phase between a first value for the initialization of the catalyst and a second value for maintaining the initialized state of the catalyst as a function of the measured temperature downstream of the catalyst.

Abstract: The invention mainly relates to a power transmission device (1) between an internal combustion engine (2) and vehicle wheels (3) consisting of a pair of electrical machines (4.1, 4.2) and a mechanical assembly (90), wherein said assembly (90) comprises at least two epicycloidal trains (5, 9) each of which is provided with three mutually engageable elements. According to said invention, a switching device (23.1) comprises means (23, 28) for simultaneously connecting the machine shaft (11) to two other elements (11.1, 11.2) of the mechanical assembly (90) during switching between two operating modes of the transmission device (1).

Abstract: The invention essentially concerns a method for fast starting on an up slope or with a high load. Said method uses a power transmission device (1.1) comprising a traction chain. Said traction chain consists in particular of a heat engine (2), a clutch (3), an electrical macine (4), and wheels (6). The invention is characterized in that while the vehicle is stopped or is running at low speed up a slope, the heat engine (2) is stopped, and when the vehicle is accelerated, the heat engine (2) is started using a starting system (7) mechanically independent of the electrical machine.

Abstract: The inventive system for evaluating the charged state of depollution means integrated into the exhaust line of a motor vehicle engine is characterised in that it comprises means (7) for determining a pressure in the depollution means, means (8) for determining the volume gas flowrate upstream said depollution means (10) and means for comparing the depollution means state defined by the thus determined pressure and the volume flowrate with a predetermined diagram (11) of the absent, overcharged and clogged states of the depollution means in order to evaluate the state thereof.

Abstract: The invention concerns a system for determining inflating pressure of tires mounted on a motor vehicle front and rear wheels. Said system comprises means (12, 14) for acquiring inflating pressures of the front and rear wheels, means (16, 18) for acquiring vertical accelerations of the front and rear wheels, and means (32) for emerging the acquired pressures and the acquired accelerations to estimate the inflating pressures of the front and rear tires.

Abstract: The invention concerns a hybrid drive train comprising a heat engine (2), at least one first electrical machine (31) and at least a second electrical machine (32) each including a stator and a rotor, a battery (BAT) connected to the first and second electrical machines (31, 32), and a controlling member (5) for controlling the charge or discharge of the battery (BAT), the heat engine (2) and the first and second electrical machines (31, 32). The invention is characterized in that the first electrical machine (31) is arranged between the transmission member (4) and one (7D) of the driven wheels (7G, 7D), and in that the second electrical machine (32) is arranged inside the heat engine (2), the rotor of the second electrical machine (32) being fixed on a crank web and its stator (34) being fixed in the housing (36) of the heat engine (2).

Abstract: The invention relates to a cylinder sleeve (2) for lining the cylindrical wall of a cylinder (A1) of an internal combustion engine. The inventive sleeve (2) comprises an inner wall (3) which is intended to guide a piston in translation and an outer wall (4) which is intended to rest on the cylindrical wall of the cylinder. The outer wall (4) of the sleeve of the cylinder (2) comprises an upper part (6) which is flared toward a top edge (5) of the sleeve (2), which is defined between the inner (3) and outer (4) walls of the cylinder sleeve. The invention also relates to a cylinder block of an internal combustion engine, comprising at least two cylinders (A1, B1) which are each equipped with one such cylinder sleeve.

Abstract: The invention relates to a method for determining service intervals for a motor vehicle fitted with an exhaust gas treatment system, the treatment consisting in selective catalytic reduction, in a catalytic converter, of the exhaust gases, using a reducing agent injected into the exhaust line, the method comprising the following steps, performed upon vehicle start-up:—the step of determining an initial value for the distance still to be covered before the next service,—the step of determining an actual distance covered since the last start,—the step of determining a quantity of reducing agent consumed since the last start,—the step of determining, as a function of this consumed quantity of reducing agent, a vehicle driving harshness factor,—the step of correcting the actual distance covered on the basis of the harshness factor, in order to obtain a weighted distance covered, and—the step of updating, on the basis of this weighted distance covered, an updated value of the distance still to be covered before th

Abstract: The invention relates to an electromagnetic control device for the opening and closing of a mechanical element, particularly a valve of an internal combustion engine. The positioning of the mechanical element in at least one position (open or closed) is achieved by the action of at least one solenoid (90) acting on a plate controlling the position of the mechanical element. The device has at least two gaps which are closed by the plate on the positioning of the mechanical element in at least one position, the plate being mounted to rotate such that the axis of rotation of the plate is between the two gaps. The device also has at least one permanent magnet (99b) to polarize the device such as to hold the plate in at least one position in the absence of current through the solenoid (90), said permanent magnet (99b) not being crossed by the principal magnetic flux (92) of the solenoid (90).

Abstract: Method of assisting regeneration of a depollution device (1) associated with an oxidation catalyst (2) and integrated in an exhaust line (3) of a motor vehicle diesel engine (4), in which a common ramp supplies fuel to the cylinders of the engine, by shifting the engine (4), through modification of engine operation control parameters and use of fuel post-injections into the cylinders, among four strategies of regeneration of the depollution device (1), the first called normal engine operation strategy, the second called level 1 strategy, the third called level 2 strategy and the fourth called over-calibrated level 2 strategy, enabling different thermal levels to be achieved in the exhaust line, with looping back of the strategies, until detection of a request for stopping the regeneration.

Abstract: Method for identifying the thresholds at which pollutant gases are emitted with a view to controlling the operation in “stop and start” mode by stopping an engine just before and while a motor vehicle is stationary, whereby, upon each re-start, the amount of fuel injected is calculated, and the difference between the amount of fuel injected and the normal amount of fuel needed is calculated, the said resulting quantity being considered to represent the amount of fuel that was injected but not burnt; the said amount of fuel injected but not burnt is then compared against a predetermined threshold value, according to the distance covered, and finally, “stop and start” operation is or is not inhibited according to whether the said amount of fuel injected but not burnt is above or below the predetermined threshold value.

Abstract: The invention relates to a transmission module (10) for an engine-transmission unit, said module comprising an input shaft (11) for connecting to a heat engine, an output shaft (12) for connecting to a gearbox, and a clutch (30) connecting said two shafts. The inventive module also comprises: an independent casing (16) comprising a first half-shell (17) and a second half-shell (18), said two half-shells forming a sealed receiving element (22) containing the clutch (30) which is naturally in the engaged position; a mechanical element (35) for maintaining the clutch (30) in said engaged position by means of a piston in the form of a disk; a hydraulic control circuit (40, 41) for acting directly on the piston against the mechanical element, in the disengaged position of said clutch (30); and a hydraulic circuit (50, 52, 53, 55, 56) for lubricating and cooling the clutch. The invention can be applied to an engine-transmission unit for motor vehicles.

Abstract: The invention pertains to a device for controlling the opening and closing of an internal combustion engine valve. This device is characterized in that the magnetic circuit of the electromagnet and/or the plate contains a magnetic material having a remnant magnetization (Fp) when the valve is in position, the remnant magnetization (Fp) being reversible so as to be cancelled when the valve changes position and having a coercive field strength in the range of 10 Oe to 600 Oe.

Abstract: The invention relates to the field of methods of three-dimensional graphical modelling. This is a method of three-dimensional graphical modelling of an interface between several elements, comprising at least: for at least two elements, a step of determining one or more parameters of the element that relate to the interface; a step of displaying, at the level of a software resource, a three-dimensional graphical modelling of the interface with the aid of the parameters determined, at least one of the elements being a phase of a manufacturing method, at least one determined parameter of which used for the displaying step corresponds to a constraint imposed by the manufacturing method phase.

Abstract: The invention relates to a device for mounting an anti-vibration actuator on an automobile. The device comprises a fastening screw for attaching the actuator on a wall of a frame of the vehicle. The main characteristic of the mounting device is that it comprises a slide attached to the vehicle frame wall, and that the actuator comprises a protrusion capable of being inserted into the slide (19, 29, 39) so that the actuator has two connection points to the wall.

Abstract: The invention concerns a system for evaluation regeneration of pollution management means (1) integrated in an exhaust line (2) of a motor vehicle engine, characterized in that it comprises means (4) for determining the thermal power input by the exhaust gas upstream of the pollution management means during the regeneration phase thereof and means (4) for comparing said power to threshold values (Sb, Sh) to determine a partial or total failure of regenerating said means.