Abstract: An arrangement for controlling the recirculation of exhaust gases within internal combustion engines, includes a recycling system of conduits connecting the engine exhaust manifold to the main inlet manifold of the carburetion system and having a recirculating valve interposed within such circuit. The obturator of the recirculation valve has a truncated-cone configuration of such design that the increase in the variable area of the opening between the stopper or obturator and its seat is a function of the engine speed and load. In recycling the exhaust gases, the invention serves as an antipollution means for the exhaust gases of internal combustion engines.

Abstract: An improved apparatus for injecting fluid into an internal combustion engine includes a fluid conduit in the engine's cylinder head for discharging fluid into the zone of the valve head. The fluid conduit outlet is positioned so that when the valve is in the seated or closed position, the outlet is substantially closed, and when the valve is in the open, unseated position, the outlet is open, thereby permitting a substantial flow of fluid through the conduit only when the valve is open.

Abstract: A piston type internal combustion engine operating on the stratified charge principle with the object of nonpolluting combustion wherein the engine has a standard valve-charging with a rich mixture. After admission of the rich mixture a quantity of air is introduced into the combustion region opposite the spark plug, before ignition, through the exhaust valve opening or by an independent valve opening into the combustion chamber or a precombustion chamber. The introduction of air can be effected either by the exhaust valve with a precombustion chamber being associated with the inlet valve or exhaust valve.

Abstract: A petalled tulip-shaped end of a transmission shaft is formed by a cold forging operation consisting of four stages. In a first stage a blank is formed to the approximate size of the component desired, one end of the blank being chamfered eventually to provide a stem. In the second forging operation the petals and stem of the component are roughed out by reverse and direct drawing respectively and a central recess having radial recesses branching off therefrom is formed in the end face of the blank remote from the stem. In the third forging operation the radial recesses and the lateral faces thereof are pushed in the direction of the stem to produce oblique ramps which are extended to provide surplus walls. The fourth and final forging operation involves a cutting off of these surplus walls.

Abstract: A braking pressure limiter device in which an inertia responsive valve normally closes under deceleration of the vehicle but has its closing action impeded by a linkage connected to an anti-roll bar so as to be responsive to the loading of the vehicle, for example the vehicle suspension to sense loading of the rear axle.

Abstract: The invention relates to a lacquer hardness testing apparatus comprising a wheel formed around its outer periphery with a sharp central edge and a weight exerting its pressure on said wheel. The apparatus comprises a horizontal shaft rotatably supporting said wheel at one forked end and having its other end operatively connected to a vertical lever through means permitting an angular movement between the two members. The vertical lever is connected in the same manner to one end of another horizontal lever carrying said weight at its opposite end, said weight thus exerting a constant force on said wheel irrespective of the position of the lacquered surface to be tested. This apparatus is intended more particularly for testing the degree of curing of lacquered surfaces of the bodies of motor vehicles.

Abstract: The invention relates to a pneumatic device for controlling the termination of an operation on a workpiece by means of the spindle of a machine. Said device comprises, around the front or tool end of the spindle, a sleeve provided with a front seal adapted, at the end of the operation, to engage the workpiece or a jig clamping same, so as to form with said workpiece or jig a closed, sealed space supplied with compressed air, an air exhaust port opening into said space and being adapted to be connected to a pneumatic receiver for controlling the end of the operation.

Abstract: An apparatus for transferring and finishing items cast several at a time in a chill mold which comprises a conveyor for cooling the items connected at its upper end to a means of transfer of the items from the output of a casting machine and below to a means of transfer which feeds a turntable on which the items are selectively mounted for their machining while passing before a turning unit and a broaching unit. In a preferred embodiment the present invention is utilized for transferring and finishing pistons.

Abstract: The invention is applied to a combustion engine having a stator and a rotor which defines, with the stator inner wall, radial rotating cylinders in which reciprocating pistons are adapted to reciprocate in such manner that the induction ports and exhaust ports in the stator inner wall communicate with each cylinder respectively during the induction and exhaust stages of a four-stroke cycle. The feature of the invention is the provision of two series of induction ports disposed in parallel. The fuel feed device of the engine has respective fuel feed means associated with each of the two series of induction ports.

Abstract: Apparatus for molding, by inoculation, cast iron parts requiring a spheroidal graphite texture, includes a mold containing the impression of the item to be cast and a treatment chamber, situated within the inlet channel of the mold, which opens into the impression of the part. The chamber contains the necessary inoculant for the casting of parts, and the volume of the chamber is equal to the sum of the volumes of the part being cast and the deadhead. The chamber is closed off from the impression portion of the mold by means of a temporary plug which is capable of being destroyed by means of the combined action of the temperature and pressure of the molten metal, the inoculation being performed within this chamber during the time necessary for the destruction of the temporary plug.

Abstract: The invention relates to an air and oil suspension device notably for motor vehicles adapted to act both as a shock absorber and as a pneumatic spring. It comprises means for compensating the expansion of the fluids contained therein in case of temperature increment. In a cylinder divided into two chambers one containing a gas and the other a hydraulic fluid is slidably mounted another hollow cylinder closed at both ends and containing essentially a hydraulic fluid and a reduced volume of gas under pressure. This second cylinder has an integral external piston-forming flange provided with opposite non-return valves permitting the passage in either direction of the hydraulic fluid which is thus caused to undergo a substantial loss of pressure, and at least one opening through the wall of said second cylinder under said flange so that the pressures can balance each other on either side of the wall of said second cylinder.

Abstract: Two series of separate elastically yieldable blocks having different stiffnesses are disposed between the damper and the vehicle body and between the damper and the engine-drive unit.The accelerations transmitted to the body and to the engine are then substantially equal. In this way, the relative movements between the engine-drive unit and the body and the resulting vibrations are reduced while the noises transmitted by the engine through its suspension are also reduced.

Abstract: An internal-combustion engine fed with a stratified charge and comprising an inlet leading into a combustion chamber for feeding thereinto a main charge of a lean mixture of a first fuel and air, and an injection device for injecting a second fuel into an ignition zone of the combustion chamber in an amount such that the mixture of the second fuel and the air contained in the lean mixture, in the ignition zone at the time of ignition, attains the level of the ignition richness of the second fuel. Thereby, the second fuel undergoes ignition and combustion and effects flame propagation to produce ignition of the first fuel. A holder with a ball valve protects the fuel injector of the injection device by obturating the injector at the end of the compression stroke and during ignition and the subsequent expansion stroke.

Abstract: The bushing comprising a substantially cylindrical portion at one end and a frustoconical resilient portion at the other end and, at said other end, a retaining flange, has angularly spaced radial and longitudinal slots formed in said other portion, and the flange segment formed by said slots are either disposed on a common circle or of helical or substantially helical configuration like the wings of a fan-washer.

Abstract: A pressure drop indicator for a braking system comprising two independent circuits, one of said circuits comprising a pressure limiter, said indicator comprising a body formed with a bore, a movable member slidably mounted in said bore and responsive to the pressure in both circuits, said movable member being adapted to co-act with a control element of an electric switch so as to close an electric signal circuit in case of fluid leakage in one of said circuits, said movable member comprising a first piston provided with a rod movable in a bore formed in the other or second piston, said second piston being adapted to co-act with said electric switch control element between two axial abutment positions, said piston providing at the ends of said bore in said body first and second chambers to which the feed lines of said first and second circuits are adapted to be connected, said second circuit comprising said pressure limiter, the pressure drop indicator being characterized in that the end of the rod of said fir

Abstract: The mechanism comprises two sub-assemblies constituting respectively a keeper and a bolt, one of which sub-assemblies has a mount on which is mounted a spring-biased movable member adapted to cooperate with a part of the other sub-assembly to lock the part when the sub-assemblies are brought together and the movable member is brought to a locking position by a manual control. The mount carries a fixed member having an end portion extending out of the mount and the movable member has an end portion also extending out of the mount. The two end portions define aligned eyes for the manual control.

Abstract: A method and apparatus for determining the rotational speed of an engine, using electrical pulses produced with revolving parts of the engine, including the use of a number of series of transducers or pickups producing numbers of asynchronous pulses, different for each series during each revolution of the engine, the transducers corresponding to as many series of detection elements comprising teeth and/or bosses spaced on the periphery of corresponding revolving parts of the engine, such that if n is the number of detection elements of a largest series giving the highest pulse frequency for a corresponding transducer due to engine revolution, and q is the total number of transducers associated with another series of detection elements, then the angular location of said another series of detection elements is obtained to the nearest 360.degree./qn.

Abstract: A lubricating system for an internal combustion engine includes a crankcase within which are located the rotating shafts, one of which is the crankshaft, and the bearings for these shafts, the crankcase having disposed above it the cylinder block of the engine, and within its bottom portion the sump for the lubricating oil. The oil pump body is radially centered within a cylinder casing by peripheral engagement with a pump seat, formed within one of the end walls of the cylinder casing of the engine crankcase and the pump body serves as the end bearing for the rotating shaft of the engine, the extension of which constitutes the pump shaft.

Abstract: The invention relates to a collapsible device for the steering column of motor vehicles, which is adapted to recede in case of sudden and strong impact, comprising a pair of members normally assembled and interlocked through sliding surfaces, each member comprising on parallel sliding surfaces conjugate male and female contours, said members being retained in their locked condition by cementing same to each other under calibrated strength conditions, and further comprising means for securing them to separate sections of a steering column.

Abstract: Each wheel is connected to the body through a hydraulic shock-absorber comprising two chambers of variable volume which communicate by way of a constricted passage. One of the chambers has a wall connected to the unsuspended part of the vehicle so that upward movement of the wheel tends to reduce the volume of this chamber. The motor bears on the body through at least one variable volume enclosure which is filled with an incompressible fluid and is connected by a connecting pipe to said chamber of the shock-absorber whose volume tends to be reduced when the wheel undergoes an upward relative displacement.