Patents Assigned to Regie Nationale des Usines Renault
  • Process for shutoff of fuel injection during the deceleration phases of an internal combustion engine
    Patent number: 4558672
    Abstract: A process whereby fuel injection is interrupted in response to detection of a deceleration and injection is again ordered when a threshold linked to the engine speed is reached. The engine speed (N) or period of rotation (T) is measured from consecutive equal intervals or angles of rotation. A difference (.DELTA.T, .DELTA.N) is then computed between the value of the last measured speed or period and the value seen through a high-pass filter of the speed or period measured at the preceding interval. This difference (.DELTA.T, .DELTA.N) is compared with a fixed threshold (S) and if an engine deceleration condition is detected, fuel injection is again ordered when the difference (.DELTA.T, .DELTA.N) is greater than the threshold (S).
    Type: Grant
    Filed: May 14, 1984
    Date of Patent: December 17, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventors: Yves Boccadoro, Bernard Lepretre
  • Process for stabilizing the idle speed of an internal combustion engine with controlled ignition
    Patent number: 4552109
    Abstract: A process for stabilizing the idle speed of an internal combustion engine with controlled ignition, wherein the angle of ignition advance to be generated is determined as a function of the rotation speed of the engine and of the pressure prevailing in the intake manifold and, at each cycle for determining the angle of ignition advance, it is determined if the engine is in no-load operation and, if so, there is determined a corrective term of dynamic advance proportional to the instantaneous speed of the engine seen through a high-pass filter (N*) and there is generated an angle of ignition advance (Av) equal to the algebraic sum of a static advance (Avs) determined as a function of the engine speed after low-pass filtering and the intake manifold pressure, on the one hand, and of the corrective term (C), on the other hand.
    Type: Grant
    Filed: December 30, 1983
    Date of Patent: November 12, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventors: Yves Boccadoro, Paul Chastagner
  • Hydraulic control device, particularly for power steering
    Patent number: 4549468
    Abstract: The slide (61) of an electrohydraulic valve (31) delimits two end chambers (57, 58) respectively fed by a control pressure that is a slave to the open or closed state of one of the two solenoid valves (51, 52) controlled by signals processed by an electronic control (50) and the establishment of a state acts on the slide (61) in direction of a throttling of the delivery which causes a feed channel of the valve (31) and a working line (27, 28) from a pump (1) to communicate with the line (70) for connection with the fluid tank (2).
    Type: Grant
    Filed: February 1, 1984
    Date of Patent: October 29, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventors: Christian Trintignac, Jean-Claude Jaccod
  • Device for separation, orientation, and positioning of parts generally flat in shape
    Patent number: 4549646
    Abstract: A device for separation, orientation, and positioning of parts essentially flat in their general shape, characterized by the fact that the parts are supplied in flat position upon a storage rail and that the device includes, in combination, a tilter which can be activated by a piston between an initial, raised position and a second, tilted position, with the tilter including a support forming a continuation of the storage rail when the tilter is in raised position so as to receive the first of parts from the reserve, with stops arresting the rest of the parts, and with the support further including retaining members (9) for preventing the part from being dislodged, while stop pads stop the first part remaining on the rail during tilting of the tilter.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: October 29, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventors: Patrick Le Tiec, Marc Lacroix
  • Electromagnetic control injection systems for diesel engines of the pressure-time type where the injector needle is controlled by the charging and discharging of a chamber
    Patent number: 4545352
    Abstract: Improvements in electromagnetic control injection systems for diesel engines of the pressure-time type where the injection needle is controlled by the discharging then charging of a chamber. Electromagnetic control fuel injection system for diesel engines in which a three-way solenoid valve is placed in the injection holder, the injector needle being controlled during its opening by the pressure drop of the fuel contained in the control space. A disc having a nozzle is used to throttle the passage assuring the pressure drop in the control chamber without throttling the passage during a rise in pressure so that the injector needle begins to move only after the complete movement of the solenoid valve.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: October 8, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventors: Jean-Pierre Jourde, Pedro Cmapo-Garraza, Marc Miettaux, Thierry Michaux
  • Welding and fluid tightness process for the production of sensors
    Patent number: 4543116
    Abstract: A process for producing pressure sensors and other similar devices in which a fluid-tight bond between a sealing glass and another material is obtained under the effect of the application of heat and an electric field.The process is characterized in that the parts to be assembled float on the surface of a molten metal bath. The bath is positioned in a chamber within which a partial vacuum prevails.
    Type: Grant
    Filed: November 28, 1983
    Date of Patent: September 24, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventors: Claude Lombard, Olivier Morvan
  • Process and device for the rapid warmup and thermal regulation of the lubricating oil of an internal combustion engine
    Patent number: 4541368
    Abstract: Process and apparatus for the rapid warmup and thermal regulation of the lubricating oil (18) of an internal combustion engine of the type cooled by a cooling fluid (12) with a high specific heat and slight viscosity such as a water-additives mixture, circulating around the cylinders (6) or liners (8) of this engine. According to the invention, this process consists in a heat exchange between this cooling fluid (12) and lubricating oil (18) at the upper zones of these cylinders or these liners, this oil (18) being able to pick up the calories coming from the cylinder head (2) of this engine to transfer them to this cooling fluid (12).Application: particularly to cooling and lubricating of internal combustion engines.
    Type: Grant
    Filed: April 26, 1984
    Date of Patent: September 17, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventor: Armand Castarede
  • Locking device, particularly for a spare wheel cradle
    Patent number: 4537431
    Abstract: A locking device, particularly for a spare wheel cradle 12 mounted to pivot under the floor 14 of an automobile, the cradle being able to be released from inside the automobile by a control mechanism 28-34 connected to a locking mechanism 16 including a housing 18 mounted under the floor, a retaining hook 36 for retaining the cradle 12 and a safety hook 38, the cradle causing being automatically locked by the retaining hook when the cradle is put in place under the floor. The locking mechanism 16 includes a mechanism for retaining the safety hook in a retracted position when the cradle is in the released position, release of the retaining mechanism 100 being controlled by the automatic locking of the cradle 42 by the retaining hook 36.
    Type: Grant
    Filed: May 6, 1983
    Date of Patent: August 27, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventor: Calin Philippe
  • Rectilinear transfer mechanism with pulleys and belts
    Patent number: 4537084
    Abstract: A mechanism to set in motion the rectilinear transfer of a moving body sliding in relation to a support is disclosed. A servomotor drives a shaft in rotation. The rotation is transformed by pulleys and belts. Two belts are staggered along the shaft axis and are wound on two pulleys of the same diameter. A first end of each of these belts is attached to the corresponding pulley, while the second end of each of these belts is attached to the moving body, the winding directions being opposite so that each rotation in one direction or the other of the shaft causes the winding of one of the belts and the unwinding of the other. Application is to Cartesian displacement robot arms and devices of rectilinear transfer with cross-motions back and forth and up and down.
    Type: Grant
    Filed: September 10, 1982
    Date of Patent: August 27, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventors: Jean R. Passemard, Gaston Keledjian
  • Automobile automatic transmission control device
    Patent number: 4532824
    Abstract: An automobile automatic transmission control device consists of a sector fixed to a vehicle. A control lever is pivoted to the sector about a fixed axis. A plurality of lockout notches are formed on an edge of the sector along a locus centered on said fixed axis. A plurality of self-locking notches are formed in said sector about a locus centered on said fixed axis. The control lever is provided with a rod biased into engagement with the lockout notches so as to prevent the unintentional pivoting of the lever. The control lever is also provided with a plurality of self-locking elements which cooperate with the self-locking notches to establish transmission selection positions. The rod can be moved out of engagement with the lockout notches by engagement of a trigger release mounted on one end of the lever.
    Type: Grant
    Filed: January 6, 1983
    Date of Patent: August 6, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventors: Jean-Michel Lamy, Joel Jacquet
  • Turbocharged internal combustion engine having means for controlling supercharging pressure
    Patent number: 4528816
    Abstract: An apparatus for pneumatic control of supercharging pressure in a turbocompressed engine, characterized by the fact that the spring of a pneumatic actuator opens a dump valve, and that a collection pipe receives the pressure in the intake pipe above the butterfly valve and below the compressor and transmits the pressure to two parallel tubes, one leading to the closing chamber of the actuator, and the other leading through a throttling constriction to the opening chamber of this actuator, which chamber communicates through a tube and through a pressure valve with the atmosphere, while a third tube supplies the control chamber of the pressure valve.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: July 16, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventor: Henri Arnaud
  • Turbocharged internal combustion engine having means for controlling supercharging pressure
    Patent number: 4528815
    Abstract: An apparatus for controlling the supercharging pressure in a turbocompressed engine, of the type including a turbocompressor the turbine portion of which is supplied through the exhaust pipe of the engine, with a shunted dump-valve, while the compressor portion supplies the engine's intake piping which is provided with a butterfly valve, and in which the dump-valve is controlled by a pneumatic actuating cylinder having a return spring for closing the actuator and a control chamber which is connected through a connection tube to either intake piping or to exhaust pipe, and a delay valve inserted within said connection tube, with the valve including a throttling constriction and a check valve set up in parallel.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: July 16, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventor: Henri Arnaud
  • Swivelling handle with three axes of rotation for an industrial robot
    Patent number: 4527945
    Abstract: A swivelling handle includes three reduction gear assemblies, each assuring the control of movement about the three axes of rotation. Each reduction gear assembly has a first reduction stage and a second reduction stage with coaxial drive. This arrangement makes possible great compactness. The third motor can be placed transversally, essentially in the axis of the second reduction unit. Thus a swivelling handle is obtained with three axes of rotation, with full electrical controls, in which the movements of rotation are created by three independent electric motors corresponding to each of the three axes of rotation. The unit is especially compact and adaptable to any type of industrial robot.
    Type: Grant
    Filed: September 14, 1982
    Date of Patent: July 9, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventors: Jean-Robert Passemard, Gaston Keledjian
  • Retractable key carrier
    Patent number: 4524594
    Abstract: A key carrier includes an electromagnetic wave transmitter and a key. The key is pivotally mounted within a drum rotatably mounted in the key case. When the drum is rotated so that an opening of the drum is in alignment with an opening of the case, a spring mounted between the key and the drum biases the key out of the case. When the drum is rotated so that the openings are out of alignment, a stop surface of the case retains the key within the drum. A second spring is provided for biasing the drum such that the openings are out of alignment. A manual control wheel is provided for rotating the drum so that the openings are in alignment, so that the key can be extracted from case.
    Type: Grant
    Filed: March 9, 1983
    Date of Patent: June 25, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventor: Jacques Bascou
  • Process and device for controlling the idling speed of a heat engine
    Patent number: 4524738
    Abstract: A process and a device for controlling the idling speed of a heat engine with controlled ignition by modification of the airflow admitted to the intake manifold of the engine when predetermined idling conditions are detected, wherein the air flow modification is performed by a double-action actuator that causes the passage section of a bypass to vary in parallel with the ordinary gas butterfly or the position of the idling stop of this butterfly. A control signal for controlling the actuator is processed by a microprocessor which receives signals indicative of predetermined input parameters, including the primary current for ignition, and derives the control signal on the basis of the received signals. For each ignition pulse provided by the interruption of the primary ignition current, the period between ignition pulses is determined, as well as the slope of the period.
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: June 25, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventor: Paul Chastagner
  • Manual gearbox ratio change control device
    Patent number: 4509384
    Abstract: The low demultiplication manual control lever (1) swivels at a fixed point (2) by means of an elastic block (3). The lever's (1) longitudinal and transverse movements are transmitted by a change rod (6) to a demultiplication link (9) at one point of which an output lever (14) is fixed by a joint (16), this output lever (14) being connected to the control shaft (13) carrying the peg (12) changing the gears in the gearbox.Therefore the demultiplication of the manual lever (1) movement is performed immediately next to the gearbox and partly inside it. This results in excellent efficiency with respect both to force and to movement.
    Type: Grant
    Filed: August 13, 1982
    Date of Patent: April 9, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventors: Jean-Michel Lamy, Jean-Jacques Boutant
  • Ball-and-socket joint, especially for mounting the casing of an orientable rear-view mirror
    Patent number: 4504165
    Abstract: The invention provides a ball-and-socket joint comprising two joint components one of which is constituted by a ball having a convex spherical surface integrally connected to a supporting rod, while the other joint component is constituted by a socket having a concave spherical surface partially surrounding said ball and frictionally connected thereto, wherein at least one of said components comprises a plurality of elements each of which defines a spherical surface section complementary to the spherical surface of the other joint component, said elements being pressed in substantially radial directions with their respective spherical surface sections, by biasing means, against the spherical surface of the other joint component.
    Type: Grant
    Filed: December 31, 1981
    Date of Patent: March 12, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventor: Guy Moeremans
  • Rocker arm for axial engine
    Patent number: 4502427
    Abstract: A timing device for an axial engine comprising for each valve a return spring, a rocker arm and a push rod actuated by a cam. Each rocker arm is pivotably mounted in a rocker arm carrier which is itself mounted so that it can slide in a direction perpendicular to the corresponding valve stem and the position of which in this perpendicular direction is maintained by means of an externally controlled regulating element which actuates this rocker arm which bears on a push rod and the valve stem.
    Type: Grant
    Filed: March 4, 1983
    Date of Patent: March 5, 1985
    Assignees: Regie Nationale des Usines Renault, Maurice Brille
    Inventor: Maurice Brille
  • Automotive vehicle drive train
    Patent number: 4499791
    Abstract: A longitudinally mounted drive train for an automotive vehicle usable with either a manual transmission or an automatic transmission. A housing encloses a clutch in the manual drive train or a torque converter in the automatic drive train. The housing is fastened, in the manual drive train, directly onto the housing of the manual transmission or, in the automatic drive train, by means of a bearing support housing to the housing of the automatic transmission. The housing can be formed of two parts. In both drive trains a shaft having a differential bevel pinion can be provided to couple the transmission to a differential to permit front wheel drive or four wheel drive. The use of common components for the normal drive train and for the automatic drive train results in greatly reduced production costs and lower parts inventory.
    Type: Grant
    Filed: April 15, 1981
    Date of Patent: February 19, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventor: Roger Brisabois
  • Synchronous electrodynamic machine with permanent magnets and cooled by a liquid
    Patent number: 4498024
    Abstract: This invention has as its object an electrodynamic machine (10) cooled by a liquid contained in a housing (12) in which is mounted a stator (14) whose inner peripheral wall (16) works with the outer peripheral wall (20) of a rotor mounted to turn in the housing (12) to define between them a gap (22) in which said fluid circulates. The machine according to the invention is characterized in that the peripheral walls (16, 20) are cylindrical and wherein their surface in contact with the cooling liquid is continuous and smooth so as to minimize the energy losses due to the laminar flow of the cooling liquid.Application to the cooling of electrodynamic machines.
    Type: Grant
    Filed: April 21, 1983
    Date of Patent: February 5, 1985
    Assignee: Regie Nationale des Usines Renault
    Inventors: Antonio Moretti, Louis Banon